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INTEGRATED CIRCUITS
DATA SHEET
TDF5242T Brushless DC motor drive circuit
Preliminary specification Supersedes data of 1997 Apr 23 File under Integrated Circuits, IC11 1997 Sep 12
Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
FEATURES * Full-wave commutation without position sensors * Built-in start-up circuitry * Six outputs that can drive three external transistor pairs: - output current 0.2 A (typ.) - low saturation voltage - built-in current limiter * Thermal protection * Tacho output without extra sensor * Transconductance amplifier for an external control transistor * Brake control input * Direction control input. GENERAL DESCRIPTION APPLICATIONS
TDF5242T
* High-power applications, for instance: - high-end hard disk drives - automotive applications.
The TDF5242T is a bipolar integrated circuit for driving 3-phase brushless DC motors in full-wave mode. The device functions sensorless, thus saving 3 hall-effect sensors, using the back-EMF (Electro Motive Force) sensing technique to sense the rotor position. It includes 6 pre-drivers able to control external FETs (Field Effect Transistors) or bipolar transistors. It offers brake and direction control. It is ideally suited for high-power applications such as high-end hard disk drives and automotive applications.
QUICK REFERENCE DATA Measured over full voltage and temperature range. SYMBOL VP VVMOT VO ILIM Note 1. An unstabilized supply can be used. ORDERING INFORMATION TYPE NUMBER TDF5242T PACKAGE NUMBER SO28 DESCRIPTION plastic small outline package; 28 leads; body width 7.5 mm VERSION SOT136-1 PARAMETER supply voltage input voltage to the output driver stages driver output voltage current limiting IO = 100 mA; lower transistor IO = 100 mA; upper transistor VVMOT = 14.5 V; RO = 47 note 1 CONDITIONS 4 3 - 1.05 150 MIN. - - - - 200 TYP. MAX. 18 18 0.35 - 250 UNIT V V V V mA
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
BLOCK DIAGRAM
handbook, full pagewidth
TDF5242T
AMP OUT 21
VMOT 6 OUTPUT DRIVER STAGE
+AMP IN -AMP IN
19 20
TRANSCONDUCTANCE AMPLIFIER
27 CAP-ST 16 START-UP OSCILLATOR
OUT-NA
CAP-DC CAP-CD
15 14
ADAPTIVE COMMUTATION DELAY
OUTPUT DRIVER STAGE
28
OUT-PA
TEST
8
THERMAL PROTECTION
TIMING
OUTPUT DRIVER STAGE COMMUTATION LOGIC
1
OUT-NB
CAP-TI
18 ROTATION SPEED AND DETECTOR OUTPUT STAGE
OUTPUT DRIVER STAGE
2
OUT-PB
FG
10
OUTPUT DRIVER STAGE
4
OUT-PC
DIRECTION LOGIC BRAKE LOGIC OUTPUT DRIVER STAGE 5 OUT-NC
22
COMP-A
TDF5242T
23 COMP-B
n.c.
12, 17, 25 EMF COMPARATORS 7 DIR 9 BRAKE 11 3 13
24 26
COMP-C MOT0
MGG988
GND2 GND1
VP
Fig.1 Block diagram.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
PINNING SYMBOL OUT-NB OUT-PB GND1 OUT-PC OUT-NC VMOT DIR TEST BRAKE FG GND2 n.c. VP CAP-CD CAP-DC PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 DESCRIPTION driver output B for driving the n-channel power FET or power NPN driver output B for driving the p-channel power FET or power PNP ground (0 V) motor supply return for output stages driver output C for driving the p-channel power FET or power PNP driver output C for driving the n-channel power FET or power NPN input voltage for the output driver stages direction input command test input/output brake input frequency generator: output of the rotation speed detector stage ground supply return for control circuits not connected supply voltage external capacitor connection for adaptive communication delay timing external capacitor connection for adaptive communication delay timing copy external capacitor connection for start-up oscillator not connected external capacitor connection for timing non-inverting input of the transconductance amplifier inverting input of the transconductance amplifier transconductance amplifier output (open collector) comparator input corresponding to output A
OUT-NC 5 VMOT 6 DIR 7
handbook, halfpage
TDF5242T
SYMBOL COMP-B COMP-C n.c. MOT0 OUT-NA OUT-PA
PIN 23 24 25 26 27 28
DESCRIPTION comparator input corresponding to output B comparator input corresponding to output C not connected input from the star point of the motor coils driver output A for driving the n-channel power FET or power NPN driver output A for driving the p-channel power FET or power PNP
OUT-NB 1 OUT-PB 2 GND1 3 OUT-PC 4
28 OUT-PA 27 OUT-NA 26 MOT0 25 n.c. 24 COMP-C 23 COMP-B 22 COMP-A
TDA5242T
TEST 8 BRAKE 9 FG 10 GND2 11 n.c. 12 VP 13 CAP-CD 14
MGG987
21 AMP OUT 20 -AMP IN 19 +AMP IN 18 CAP-TI 17 n.c. 16 CAP-ST 15 CAP-DC
CAP-ST n.c. CAP-TI +AMP IN -AMP IN AMP OUT COMP-A
16 17 18 19 20 21 22
Fig.2 Pin configuration.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
FUNCTIONAL DESCRIPTION Introduction Full-wave driving of a three phase motor requires three push-pull output stages. In each of the six possible states two outputs are active, one sourcing (H) and one sinking (L). The third output presents a high impedance (Z) to the motor, which enables measurement of the motor back-EMF (Electro Motive Force) in the corresponding motor coil by the EMF comparator at each output. The commutation logic is responsible for control of the output transistors and selection of the correct EMF comparator. In Table 1, the six possible states of the externally connected output transistors have been depicted and the corresponding output levels on the NA, PA, NB, PB, NC and PC outputs of the TDF5242T. The zero-crossing in the motor EMF (detected by the comparator selected by the commutation logic) is used to calculate the correct moment for the next commutation, that is, the change to the next output state. The delay is calculated (depending on the motor loading) by the adaptive commutation delay block. The output stages are protected by a current limiting circuit and by thermal protection. The detected zero-crossings are used to provide speed information. The information has been made available on the FG output pin. This output provides an output signal with a frequency equal to the commutation frequency. Table 1 DIR H H H H H H L L L L L L Note 1. H = HIGH state; L = LOW state; Z = high-impedance OFF-state. Output states (note 1) STATE 1 2 3 4 5 6 1 2 3 4 5 6 MOT1 Z H H Z L L Z L L Z H H OUT-NA L L L L H H L H H L L L OUT-PA H L L H H H H H H H L L MOT2 L L Z H H Z L Z H H Z L OUT-NB OUT-PB H H L L L L H L L L L H H H H L L H H H L L H H MOT3 H Z L L Z H H H Z L L Z
TDF5242T
The system will only function when the EMF voltage from the motor is present. Therefore, a start oscillator is provided that will generate commutation pulses when no zero-crossings in the motor voltage are available. A timing function is incorporated into the device for internal timing and for timing of the reverse rotation detection. The TDF5242T also contains an uncommitted transconductance amplifier (OTA) that can be used as a control amplifier. The output is capable of directly driving an external power transistor. The TDF5242T is designed for systems with low current consumption. It uses I2L logic and adaptive base drive for the output transistors (patented). Start-up and commutation control The system has been designed in such a way that the tolerances of the application components are not critical. However, the approximate values of the following components must still be determined: * The start capacitor; this determines the frequency of the start oscillator * The two capacitors in the adaptive commutation delay circuit; these are important in determining the optimum moment for commutation, depending on the type and loading of the motor * The timing capacitor; this provides the system with its timing signals.
OUT-NC OUT-PC L L H H L L L L L H H L L H H H H L L L H H H H
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
START CAPACITOR (CAP-ST) This capacitor determines the frequency of the start oscillator. It is charged and discharged, with a current of 2 A, from 0.05 to 2.2 V and back to 0.05 V. The time to complete one cycle is: t start = ( 2.15 x C ) s (with C in F ) (1)
TDF5242T
Example: J = 72 x 10-6 kg.m2, K = 25 x 10-3 Nm/A, p = 6 and I = 0.5 A; this gives fosc = 5 Hz. If the damping is high, a start frequency of 2 Hz can be chosen or t = 500 ms, thus, according to equation (1): C = 0.5/2.15 = 0.23 F (choose 220 nF). ADAPTIVE COMMUTATION DELAY (CAP-CD AND CAP-DC) In this circuit the capacitor CAP-CD is charged during one commutation period, with an interruption of the charging current during the diode pulse. During the next commutation period the capacitor is discharged at twice the charging current. The charging current is 8.1 A and the discharging current 16.2 A; the voltage range is from 0.9 to 2.2 V. The voltage must stay within this range at the lowest commutation frequency of interest, fC1: 8.1 x 10 6231 C = ------------------------- = ------------ (C in nF) f x 1.3 f C1 If the commutation frequency is lower, a constant commutation delay after the zero-crossing is generated by the discharge from 2.2 down to 0.9 V at 16.2 A; maximum delay = (0.076 x C) ms (with C in nF) Example: nominal commutation frequency = 900 Hz and the lowest usable frequency = 400 Hz; so: 6231 CAP-CD = ------------ = 15.6 (choose 18 nF) 400 The other capacitor, CAP-DC, is used to repeat the same delay by charging and discharging with 15.5 A. The same value can be chosen as for CAP-CD. Figure 3 illustrates typical voltage waveforms.
-6
The start oscillator is reset by a commutation pulse and is only active when the system is in the start-up mode. A pulse from the start oscillator will cause the outputs to change to the next state. If the movement of the motor generates enough EMF, the TDF5242T will run the motor. If the amount of EMF generated is insufficient, then the motor will move one step only and will oscillate in its new position. The amplitude of the oscillation must decrease sufficiently before the arrival of the next start pulse, to prevent the pulse arriving during the wrong phase of the oscillation. The start capacitor should be chosen to meet this requirement. The oscillation frequency of the motor is given by: 1 f osc = ---------------------------------Kt x I x p 2 ---------------------J where: Kt = torque constant (Nm/A) I = current (A) p = number of magnetic pole-pairs J = inertia J (kg.m2).
handbook, full pagewidth
Vmax = VIH voltage on CAP-CD VIL COM(1) COM COM COM COM COM
voltage on CAP-DC t ZCR(2) ZCR ZCR ZCR ZCR ZCR
MGG993
(1) COM = commutation. (2) ZCR = zero-crossing.
Fig.3 CAP-CD and CAP-DC typical voltage waveforms in normal running mode.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
THE TIMING CAPACITOR (CAP-TI) Capacitor CAP-TI is used for timing the successive steps within one commutation period; these steps include some internal delays. The most important function is the watchdog time in which the motor EMF has to recover from a negative diode-pulse back to a positive EMF voltage (or vice versa). A watchdog timer is a guarding function that only becomes active when the expected event does not occur within a predetermined time. The EMF usually recovers within a short time if the motor is running normally (<<1 ms). However, if the motor is motionless or rotating in the reverse direction, the time can be longer (>>1 ms). A watchdog time must be chosen such that it is long enough for a motor without detectable EMF, however, it must be short enough to detect reverse rotation. If the watchdog time is made too long, then the motor may run in the wrong direction (with little torque). The capacitor is charged with a current of 57 A from 0.2 to 0.3 V. Above this level, it is charged with a current of 5 A up to 2.2 V only if the selected motor EMF remains in the wrong polarity (watchdog function). At the end, or, if the motor voltage becomes positive, the capacitor is discharged with a current of 28 A. The watchdog time is the time taken to charge the capacitor, with a current of 5 A, from 0.3 to 2.2 V. To ensure that the internal delays are covered CAP-TI must have a minimum value of 2 nF. For the watchdog function a value for CAP-TI of 10 nF is recommended.
TDF5242T
To ensure a good start-up and commutation, care must be taken that no oscillations occur at the trailing edge of the flyback pulse. Snubber networks at the outputs should be critically damped. Typical voltage waveforms are illustrated by Fig.4. Miscellaneous functions In addition to start-up and commutation control, the TDF5242T provides the following functions: * Generation of the tacho signal FG * General purpose Operational Transconductance Amplifier (OTA) * Possibilities of motor control * Direction function and brake function * High current and temperature protection. THE OPERATIONAL TRANSCONDUCTANCE AMPLIFIER (OTA) The OTA is an uncommitted amplifier with a high output current (40 mA) that can be used as a control amplifier or as a level converter in a Switched Mode Power Supply (SMPS). The common mode input range includes ground (GND) and rises to VP - 1.7 V. The high sink current enables the OTA to drive a power transistor directly in an analog control amplifier or in a SMPS driver. Although the gain is not extremely high (0.3 S), care must be taken with the stability of the circuit if the OTA is used as a linear amplifier as no frequency compensation is provided.
handbook, full pagewidth
VMOT1
VSWH voltage on CAP-TI VSWM VSWL
MGG994
If the chosen value of CAP-TI is too small, oscillations can occur in certain positions of a blocked rotor. If the chosen value is too large, then it is possible that the motor may run in the reverse direction (synchronously with little torque).
Fig.4 Typical CAP-TI and VMOT1 voltage waveforms in normal running mode.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
The convention for the inputs (inverting or not) is the same as for a normal operational amplifier: with a resistor (as a load) connected from the output (AMP OUT) to the positive supply, a positive-going voltage is found when the non-inverting input (+AMP IN) is positive with respect to the inverting input (-AMP IN). Note that a `plus' input causes less current, and consequently a positive voltage. MOTOR CONTROL DC motors can also be operated with analog control using the OTA. For the analog control an external transistor is required. The OTA can supply the base current for this transistor and act as a control amplifier (see Fig.8). FG SIGNAL The FG (Frequency Generator) signal is generated in the TDF5242T by using the zero-crossing of the motor EMF from the three motor windings and the commutation signal. Output FG switches from HIGH-to-LOW on all zero crossings and from LOW-to-HIGH on all commutations. Output FG can source typically 75 A and sink more than 3 mA. Example: a 3-phase motor with 6 magnetic pole-pairs at 1500 rpm and with a full-wave drive has a commutation frequency of 25 x 6 x 6 = 900 Hz, and generates a tacho signal of 900 Hz. DIRECTION FUNCTION
TDF5242T
* If the voltage on pin 7 is <2.3 V the motor is running in one direction (depending on the motor connections) * If pin 7 is floating or the voltage is >2.7 V the motor is running in the other direction. BRAKE FUNCTION * If the voltage on pin 9 (pin BRAKE) is <2.3 V the motor brakes; in this condition the external outputs are driven to a HIGH voltage level * If pin 9 is floating or the voltage is >2.7 V the motor runs normally. RELIABILITY The output stages are protected in two ways: * Current limiting of the `lower' output transistors. The `upper' output transistors use the same base current as the conducting `lower' transistor (+15%). This means that the current to and from the output stages is limited. * Thermal protection of the six output transistors is achieved in such a way that the transistors are switched off when the junction temperature becomes too high.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP VI PARAMETER supply voltage input voltage; all pins except VMOT, CAP-ST, CAP-TI, CAP-CD and CAP-DC VMOT input voltage output voltage FG AMP OUT OUT-NA, OUT-NB and OUT-NC OUT-PA, OUT-PB and OUT-PC VI Tstg Tamb Ptot Ves input voltage CAP-ST, CAP-TI, CAP-CD and CAP-DC storage temperature operating ambient temperature total power dissipation electrostatic handling see Fig.5 see Chapter "Handling" HANDLING
handbook, halfpage
TDF5242T
CONDITIONS 4 VI < 18 V
MIN. 18 -0.3
MAX. V V VP + 0.5
UNIT
VVMOT VO
3 GND - - 0.2 - -55 -40 - -
18 VP 18 - 2.5 +150 +85 - 500
V V V V V C C V
VVMOT - 0.9 V
3
MGG989
Ptot (W) 2
Every pin withstands the ESD test according to "MIL-STD-883C class 2". Method 3015 (HBM 1500 , 100 pF) 3 pulses + and 3 pulses - on each pin referenced to ground. QUALITY SPECIFICATION In accordance with "SNW-FQ-611-E". The number of the quality specification can be found in the "Quality Reference Handbook". The handbook can be ordered using the code 9397 750 00192.
1
0 -50
0
50
100
150 200 Tamb (C)
Fig.5 Power derating curve.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
CHARACTERISTICS VP = 14.5 V 10%; Tamb = -40 to +85 C; unless otherwise specified. SYMBOL Supply VP IP VVMOT supply voltage supply current input voltage to the output driver stages note 1 note 2 see Fig.1 4 - 3 - 5.2 - PARAMETER CONDITIONS MIN. TYP.
TDF5242T
MAX.
UNIT
18 6.25 18
V mA V
Thermal protection TSD T temperature at temperature sensor causing shut-down decrease in temperature before switch-on after shut-down 130 - 140 150 C K
TSD - 30 -
COMP-A, COMP-B, COMP-C and MOT0 VI II VCSW VCSW Vhys VO(n) input voltage input bias current comparator switching level variation in comparator switching levels comparator input hysteresis Tamb = 25 C upper transistor; IO = -100 mA; Tamb = 25 C lower transistor; IO = 10 mA; Tamb = 25 C VO(p) p-channel driver output voltage note 3 -0.5 0.5 V < VI < VVMOT - 1.5 V -10 20 -3 - -1.05 - - 25 0 75 - VVMOT 0 30 +3 - - V A mV mV V
OUT-NA, OUT-NB, OUT-NC, OUT-PA, OUT-PB and OUT-PC n-channel driver output voltage V
-
- - - - - 180 - - - 4 -
0.35 - 0.35 180 180 250
V V V mV mV mA
upper transistor; -1.05 IO = -10 mA; Tamb = 25 C - lower transistor; IO = 100 mA; Tamb = 25 C
VOL VOH ILIM VI
variation in saturation voltage between lower transistors variation in saturation voltage between upper transistors current limiting
IO = 100 mA; Tamb = 25 C - IO = -100 mA; Tamb = 25 C -
lower transistor; RO = 47 150 -0.3 - Tamb = 25 C Tamb = 25 C - - -
+AMP IN and -AMP IN input voltage differential mode voltage without `latch-up' Ib CI Voffset input bias current input capacitance input offset voltage VP - 1.7 V VP 650 - 10 V nA pF mV
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
TDF5242T
SYMBOL
PARAMETER
CONDITIONS
MIN. -
TYP. -
MAX.
UNIT
AMP OUT (open collector) Isink Vsat VO SR gm(tr) DIR VIL VIH IIL IIH BRAKE VBM brake-mode voltage enable brake mode; 4 V < VP < 18 V normal mode; 4 V < VP < 18 V II input current brake mode; Tamb = 25 C normal mode; Tamb = 25 C FG (push-pull) VOL VOH tTHL f FG ------------f comm CAP-ST Isink Isource VSWL VSWH output sink current output source current LOW level switching voltage HIGH level switching voltage Tamb = 25 C Tamb = 25 C 1.5 -2.5 - - 2.0 -2.0 0.20 2.20 2.5 -1.5 - - A A V V LOW level output voltage HIGH level output voltage HIGH-to-LOW transition time ratio of FG frequency and commutation frequency IO = 1.6 mA IO = -60 A Tamb = 25 C; CL = 50 pF; RL = 10 k Tamb = 25 C - - - - - 0.5 1 0.4 - - V V s VP - 0.3 - - 2.7 - - - - -20 0 2.3 - -30 20 V V A A LOW level input voltage (reverse rotation) HIGH level input voltage (normal rotation) LOW level input current (reverse rotation) HIGH level input current (normal rotation) reverse mode; 4 V < VP < 18 V normal mode; 4 V < VP < 18 V reverse mode; Tamb = 25 C normal mode; Tamb = 25 C - 2.7 - - - - -20 0 2.3 - - - V V A A output sink current saturation voltage output voltage slew rate transfer gain RL = 330 ; CL = 50 pF II = 40 mA 40 - -0.5 40 0.3 mA V V mA/s S 1.5 - - - 2.1 +18 - -
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
TDF5242T
SYMBOL CAP-TI Isink Isource VSWL VSWM VSWH CAP-CD Isink Isource Isink/Isource VIL V IL ----------T VIH CAP-DC Isink Isource Isink/Isource VIL V IL ----------T VIH Notes
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT A A A mV V V A A mV mV/K
output sink current output source current LOW level switching voltage MIDDLE level switching voltage HIGH level switching voltage 0.2 V < VCAP-TI < 0.3 V 0.3 V < VCAP-TI < 2.2 V Tamb = 25 C Tamb = 25 C Tamb = 25 C
20 -64 -6.5 - - -
28 -57 -5.5 50 0.30 2.20
38 -50 -4.5 - - -
output sink current output source current ratio of sink to source current LOW level input voltage temperature coefficient of LOW level input voltage HIGH level input voltage Tamb = 25 C
10.6 -5.3 1.85 825 - 2.3
16.2 -8.1 2.05 850 -1.4 -
22 -11 2.25 875 - 2.5
V A A mV mV/K
output sink current output source current ratio of sink to source current LOW level input voltage temperature coefficient of LOW level input voltage HIGH level input voltage Tamb = 25 C
10.1 -20.9 0.9 825 - 2.3
15.5 -15.5 1.025 850 -1.4 -
20.9 -10.1 1.15 875 - 2.5
V
1. An unstabilized supply can be used. 2. VVMOT = VP; all other inputs at 0 V; all outputs at VP; IO = 0 mA. 3. Switching levels with respect to driver outputs OUT-NA, OUT-NB, OUT-NC, OUT-PA, OUT-PB and OUT-PC.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
APPLICATION INFORMATION
TDF5242T
handbook, full pagewidth
RY
(1)
330 n.c. 28 27 26 25
RX
(1)
1 k
1 k
1 k
10 nF n.c. 21 20 19 18 17
100 nF 16 15
18 nF
24
23
22
RY
(1)
TDF5242T 1 2 3 4 5 6 7 8 9 10 11 12 n.c. 13 14 18 nF
RX
(1)
RY
(1)
FG VP DIR BRAKE 1 F
RX
(1)
1 F VMOT
MGG990
(1) RX = RY > 8 (VMOT - 1.5).
Fig.6
Application diagram without use of the Operational Transconductance Amplifier (OTA) with bipolar power transistors.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
TDF5242T
handbook, full pagewidth
330 n.c. 28 27 26 25
1 k
1 k
1 k
10 nF n.c. 21 20 19 18 17
100 nF 16 15
18 nF
24
23
22
TDF5242T 1 2 3 4 5 6 7 8 9 10 11 12 n.c. 13 14 18 nF
FG VP DIR 1 F VMOT
MGG991
BRAKE
1 F
Fig.7 Application diagram without use of the Operational Transconductance Amplifier (OTA) with MOSFETs.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
TDF5242T
handbook, full pagewidth
BD434 +14 V 680
39 k
10 k
470 47 nF 120 47 nF
1 F
21 47 k
19
6
from DAC
20
TDF5242T
220 nF
16
START-UP OSCILLATOR
OUT-PA
28
18 nF
15 14
ADAPTIVE COMMUTATION DELAY
OUT-NA
27
18 nF 8 2
TEST
THERMAL PROTECTION
TIMING
OUT-PB
10 nF
18 ROTATION SPEED AND DETECTOR OUTPUT STAGE
COMMUTATION LOGIC OUT-NB 1
FG to microcontroller
10
OUT-PC
4
DIRECTION LOGIC GND2 11 OUT-NC BRAKE LOGIC 22 5
GND1 3
23
+5 V
13 EMF COMPARATORS
24 26
n.c.
12, 17, 25 7 DIR 9
MGG992
BRAKE
Fig.8 Application of the TDF5242T as a scanner driver, with the use of the uncommitted on-chip OTA.
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
PACKAGE OUTLINE SO28: plastic small outline package; 28 leads; body width 7.5 mm
TDF5242T
SOT136-1
D
E
A X
c y HE vMA
Z 28 15
Q A2 A1 pin 1 index Lp L 1 e bp 14 wM detail X (A 3) A
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. OUTLINE VERSION SOT136-1 REFERENCES IEC 075E06 JEDEC MS-013AE EIAJ EUROPEAN PROJECTION A max. 2.65 0.10 A1 0.30 0.10 A2 2.45 2.25 A3 0.25 0.01 bp 0.49 0.36 c 0.32 0.23 D (1) 18.1 17.7 0.71 0.69 E (1) 7.6 7.4 0.30 0.29 e 1.27 0.050 HE 10.65 10.00 L 1.4 Lp 1.1 0.4 Q 1.1 1.0 0.043 0.039 v 0.25 0.01 w 0.25 0.01 y 0.1 0.004 Z
(1)
0.9 0.4 0.035 0.016
0.012 0.096 0.004 0.089
0.019 0.013 0.014 0.009
0.419 0.043 0.055 0.394 0.016
8o 0o
ISSUE DATE 95-01-24 97-05-22
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Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our "IC Package Databook" (order code 9398 652 90011). Reflow soldering Reflow soldering techniques are suitable for all SO packages. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 C. Wave soldering
TDF5242T
Wave soldering techniques can be used for all SO packages if the following conditions are observed: * A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. * The longitudinal axis of the package footprint must be parallel to the solder flow. * The package footprint must incorporate solder thieves at the downstream end. During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Maximum permissible solder temperature is 260 C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 C within 6 seconds. Typical dwell time is 4 seconds at 250 C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. Repairing soldered joints Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 C.
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Preliminary specification
Brushless DC motor drive circuit
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
TDF5242T
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale.
1997 Sep 12
18
Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
NOTES
TDF5242T
1997 Sep 12
19
Philips Semiconductors - a worldwide company
Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. Box 213, Tel. +43 160 1010, Fax. +43 160 101 1210 Belarus: Hotel Minsk Business Center, Bld. 3, r. 1211, Volodarski Str. 6, 220050 MINSK, Tel. +375 172 200 733, Fax. +375 172 200 773 Belgium: see The Netherlands Brazil: see South America Bulgaria: Philips Bulgaria Ltd., Energoproject, 15th floor, 51 James Bourchier Blvd., 1407 SOFIA, Tel. +359 2 689 211, Fax. +359 2 689 102 Canada: PHILIPS SEMICONDUCTORS/COMPONENTS, Tel. +1 800 234 7381 China/Hong Kong: 501 Hong Kong Industrial Technology Centre, 72 Tat Chee Avenue, Kowloon Tong, HONG KONG, Tel. +852 2319 7888, Fax. +852 2319 7700 Colombia: see South America Czech Republic: see Austria Denmark: Prags Boulevard 80, PB 1919, DK-2300 COPENHAGEN S, Tel. +45 32 88 2636, Fax. +45 31 57 0044 Finland: Sinikalliontie 3, FIN-02630 ESPOO, Tel. +358 9 615800, Fax. +358 9 61580920 France: 4 Rue du Port-aux-Vins, BP317, 92156 SURESNES Cedex, Tel. +33 1 40 99 6161, Fax. +33 1 40 99 6427 Germany: Hammerbrookstrae 69, D-20097 HAMBURG, Tel. +49 40 23 53 60, Fax. +49 40 23 536 300 Greece: No. 15, 25th March Street, GR 17778 TAVROS/ATHENS, Tel. +30 1 4894 339/239, Fax. +30 1 4814 240 Hungary: see Austria India: Philips INDIA Ltd, Band Box Building, 2nd floor, 254-D, Dr. Annie Besant Road, Worli, MUMBAI 400 025, Tel. +91 22 493 8541, Fax. +91 22 493 0966 Indonesia: see Singapore Ireland: Newstead, Clonskeagh, DUBLIN 14, Tel. +353 1 7640 000, Fax. +353 1 7640 200 Israel: RAPAC Electronics, 7 Kehilat Saloniki St, PO Box 18053, TEL AVIV 61180, Tel. +972 3 645 0444, Fax. +972 3 649 1007 Italy: PHILIPS SEMICONDUCTORS, Piazza IV Novembre 3, 20124 MILANO, Tel. +39 2 6752 2531, Fax. +39 2 6752 2557 Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108, Tel. +81 3 3740 5130, Fax. +81 3 3740 5077 Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL, Tel. +82 2 709 1412, Fax. +82 2 709 1415 Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR, Tel. +60 3 750 5214, Fax. +60 3 757 4880 Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905, Tel. +9-5 800 234 7381 Middle East: see Italy Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB, Tel. +31 40 27 82785, Fax. +31 40 27 88399 New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND, Tel. +64 9 849 4160, Fax. +64 9 849 7811 Norway: Box 1, Manglerud 0612, OSLO, Tel. +47 22 74 8000, Fax. +47 22 74 8341 Philippines: Philips Semiconductors Philippines Inc., 106 Valero St. Salcedo Village, P.O. Box 2108 MCC, MAKATI, Metro MANILA, Tel. +63 2 816 6380, Fax. +63 2 817 3474 Poland: Ul. Lukiska 10, PL 04-123 WARSZAWA, Tel. +48 22 612 2831, Fax. +48 22 612 2327 Portugal: see Spain Romania: see Italy Russia: Philips Russia, Ul. Usatcheva 35A, 119048 MOSCOW, Tel. +7 095 755 6918, Fax. +7 095 755 6919 Singapore: Lorong 1, Toa Payoh, SINGAPORE 1231, Tel. +65 350 2538, Fax. +65 251 6500 Slovakia: see Austria Slovenia: see Italy South Africa: S.A. PHILIPS Pty Ltd., 195-215 Main Road Martindale, 2092 JOHANNESBURG, P.O. Box 7430 Johannesburg 2000, Tel. +27 11 470 5911, Fax. +27 11 470 5494 South America: Rua do Rocio 220, 5th floor, Suite 51, 04552-903 Sao Paulo, SAO PAULO - SP, Brazil, Tel. +55 11 821 2333, Fax. +55 11 829 1849 Spain: Balmes 22, 08007 BARCELONA, Tel. +34 3 301 6312, Fax. +34 3 301 4107 Sweden: Kottbygatan 7, Akalla, S-16485 STOCKHOLM, Tel. +46 8 632 2000, Fax. +46 8 632 2745 Switzerland: Allmendstrasse 140, CH-8027 ZURICH, Tel. +41 1 488 2686, Fax. +41 1 481 7730 Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1, TAIPEI, Taiwan Tel. +886 2 2134 2865, Fax. +886 2 2134 2874 Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd., 209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260, Tel. +66 2 745 4090, Fax. +66 2 398 0793 Turkey: Talatpasa Cad. No. 5, 80640 GULTEPE/ISTANBUL, Tel. +90 212 279 2770, Fax. +90 212 282 6707 Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7, 252042 KIEV, Tel. +380 44 264 2776, Fax. +380 44 268 0461 United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes, MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421 United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409, Tel. +1 800 234 7381 Uruguay: see South America Vietnam: see Singapore Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD, Tel. +381 11 625 344, Fax.+381 11 635 777
For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 (c) Philips Electronics N.V. 1997
Internet: http://www.semiconductors.philips.com
SCA55
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
297027/1200/02/pp20
Date of release: 1997 Sep 12
Document order number:
9397 750 02378

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