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Ordering number : ENN7229
Monolithic Digital IC
LB11920
Three-Phase Brushless Motor Driver for Office Equipment Applications
Overview
The LB11920 is a direct PWM drive motor driver IC for 3-phase power brushless motors. The PWM duty can be controlled by IC inputs, and it can be used over the wide supply voltage range of 9.5 to 30 V.
Package Dimensions
unit: mm 3147C-DIP28H (500mil)
[LB11920]
28 15
Functions and Features
Three-phase bipolar drive (35 V, 3.5 A) Direct PWM drive Built-in high and low side kickback absorbing diodes Braking function (short-circuit braking) Built-in forward/reverse direction switching circuit Full complement of built-in protection circuits, including current limiter, low-voltage protection, motor lock (physical constraint) protection, and thermal protection circuits * The PWM duty can be controlled by IC inputs * * * * * *
R1.7 12.7 11.2 8.4 0.4
1
20.0 26.75
14
(1.81)
1.78
0.6
1.0
4.0
4.0
SANYO: DIP-28H
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Supply voltage 1 Supply voltage 2 Output voltage Output current Allowable power dissipation 1 Allowable power dissipation 2 Operating temperature Storage temperature Symbol VM max VCC max VOUT max IO max Pd max1 Pd max2 Topr Tstg OUT1 to OUT3 T 500 ms Independent IC With an infinitely large heat sink. Conditions Ratings 35 7 35 3.5 3 20 -20 to +80 -55 to +150 Unit V V V A W W C C
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O3003SI (OT) No. 7229-1/10
LB11920 Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage range 1 Supply voltage range 2 HP pin applied voltage HP pin output current Symbol VM VCC VHP IHP Conditions Ratings 9.5 to 30 4.5 to 5.5 0 to 32 0 to 3 Unit V V V mA
Electrical Characteristics at Ta = 25C, VM = RF = 27 V, VCC = 5 V
Parameter Supply current 1 Supply current 2 [Output block] Output saturation voltage 1 Output saturation voltage 2 Output saturation voltage 3 Output leakage current Output delay time 1 Output delay time 2 Lower diode forward 1 Lower diode forward 2 Lower diode forward 3 Upper diode forward 1 Upper diode forward 2 Upper diode forward 3 [Hall Amplifier Block] Input bias current Common-mode input voltage range 1 Common-mode input voltage range 2 Hall input sensitivity Hysteresis width Input voltage L H Input voltage H L [PWM oscillator] Output H level voltage Output L level voltage External C charge current Oscillator frequency Amplitude [CSD circuit] Operating voltage External C charge current Operating time VOH (CSD) ICHG (CSD) T (CSD) VCSD = 0V C = 10 F *Design target value 3.6 -15 3.9 -11 3.5 4.2 -7 V A s VOH (PWM) VOL (PWM) ICHG (PWM) f (PWM) V (PWM) VPWM = 2.1 V C = 1000 pF 2.75 1.0 -60 15.8 1.6 3.0 1.2 -45 20 1.8 3.25 1.3 -30 24.2 2.1 V V A kHz Vp-p VIN VSLH VSHL IHB VICM1 VICM2 Hall device used For input one-side bias (Hall IC application) at differential input -2 0.5 0 50 20 5 -25 30 15 -15 50 25 -5 -0.1 VCC - 2.0 VCC A V V mVp-p mV mV mV VO sat1 VO sat2 VO sat3 IO leak td1 td2 VD1-1 VD1-2 VD1-3 VD2-1 VD2-2 VD2-3 PWMIN "H" "L" PWMIN "L" "H" ID = -1.0 A ID = -2.0 A ID = -3.0 A ID = 1.0 A ID = 2.0 A ID = 3.0 A 1.25 1.8 1.1 1.3 1.5 1.3 2.0 2.7 IO = 1.0 A, VO (SINK) + VO (SOURCE) IO = 2.0 A, VO (SINK) + VO (SOURCE) IO = 3.0 A, VO (SINK) + VO (SOURCE) 1.7 2.0 2.4 2.4 2.9 3.5 100 2.5 3.6 1.5 1.9 2.3 1.7 2.7 3.7 V V V A s s V V V V V V Symbol IVCC-1 IVCC-2 VCC pin VCC pin at stop mode Conditions Ratings min typ 9 2.0 max 13 3.0 Unit mA mA
Note: *This parameter is a design target value and is not measured.
Continued on next page.
No. 7229-2/10
LB11920
Continued from preceding page.
Parameter [HP pin] Output low level voltage Output leakage current [Thermal shutdown operation] Thermal shutdown operating temperature Hysteresis width [Current limiter circuit(RF pin)] Limiter voltage [Low-voltage protection circuit] Operating voltage Release voltage Hysteresis width [PWMIN pin] Input frequency H level input voltage L level input voltage Input open voltage Hysteresis width H level input current L level input current [S/S pin] H level input voltage L level input voltage Input open voltage Hysteresis width H level input current L level input current [F/R pin] H level input voltage L level input voltage Input open voltage Hysteresis width H level input current L level input current [BR pin] H level input voltage L level input voltage Input open voltage Hysteresis width H level input current L level input current VIH (BR) VIL (BR) VIO (BR) VIS (BR) IIH (BR) IIL (BR) VBR = VCC VBR = 0 V 2.0 0 VCC - 0.5 0.15 -10 -116 0.25 0 -87 VCC 1.0 VCC 0.35 10 -58 V V V V A A VIH (FR) VIL (FR) VIO (FR) VIS (FR) IIH (FR) IIL (FR) VF/R = VCC VF/R = 0 V 2.0 0 VCC - 0.5 0.15 -10 -116 0.25 0 -87 VCC 1.0 VCC 0.35 10 -58 V V V V A A VIH (SS) VIL (SS) VIO (SS) VIS (SS) IIH (SS) IIL (SS) VS/S = VCC VS/S = 0 V 2.0 0 VCC - 0.5 0.15 -10 -116 0.25 0 -87 VCC 1.0 VCC 0.35 10 -58 V V V V A A f (PI) VIH (PI) VIL (PI) VIO (PI) VIS (PI) IIH (PI) IIL (PI) VPWMIN = VCC VPWMIN = 0 V 2.0 0 VCC - 0.5 0.15 -10 -116 0.25 0 -87 50 VCC 1.0 VCC 0.35 10 -58 kHz V V V V A A VSDL VSDH VSD 3.6 4.1 0.35 3.8 4.3 0.5 4.0 4.5 0.65 V V V VRF 0.45 0.5 0.55 V TTSD TSD *Design target value (junction temperature) *Design target value (junction temperature) 150 180 45 C C VOL (HP) Ileak (HP) IHP = 2 mA VHP = 30 V 0.1 0.4 10 V A Symbol Conditions Ratings min typ max Unit
Note: *This parameter is a design target value and is not measured.
No. 7229-3/10
LB11920
Pd max -- Ta
24
Allowable power dissipation, Pdmax -- W
20
With an infinitely large heat sink
16
12
8
4 3
Without any heat sink
0 -20
0
Ambient temperature, Ta -- C
20
40
60
80
100
ILB01545
Truth Table
Source Sink 1 2 3 4 5 6 OUT2 OUT1 OUT3 OUT1 OUT3 OUT2 OUT1 OUT2 OUT1 OUT3 OUT2 OUT3 IN1 H H H L L L F/R = "L" IN2 L L H H H L IN3 H L L L H H IN1 L L L H H H F/R = "H" IN2 H H L L L H IN3 L H H H L L
S/S Pin
Input state High or open L IC state Stopped Start
PWMIN Pin
Input state High or open L IC state Output off Output on
BR Pin
Input state High or open L IC state -- Brake state
The PWMIN pin must be held at the low-level voltage when this IC is operated with a voltage applied to the TOC pin. Pin Assignment
OUT1 28 NC 27 GND2 26 VM 25 RF 24 GND3 23 IN3+ 22 IN3- 21 IN2+ 20 IN2- 19 IN1+ 18 IN1- 17 CSD 16 TOC 15
LB11920
1 OUT2
2
3
4 NC
5 VM
6 RF
7 HP
8 BR
9 PWMIN
10 F/R
11 S/S
12 VCC
13
14
OUT3 GND2
GND1 PWM Top view
No. 7229-4/10
+ CSD CSD LVSD CIRCUIT VM CURR LIM Rf 27 V +
5V
VCC
Equivalent Circuit Block Diagram
+ TSD LOGIC RF OUT1 HALL LOGIC DRIVER OUT2 HALL HYS AMP F/R BR OUT3 F/R BR HP IN1 IN2 IN3 GND2 VCC H H H
GND1
GND3
-
TOC
+
PWM
PWM
LB11920
OSC
RESET
VREF
S/S
PWM
IN
S/S
PWMIN
No. 7229-5/10
LB11920 Pin Functions
Pin No. Pin Function
VM
Equivalent circuit
5 300 RF 6 25 24
28 1 2
OUT1 OUT2 OUT3 Motor drive output pin
3, 26 5, 25
GND2 VM
Output GND pin Power pin Output Tr power and output current detector pins, which connect low resistance (Rf) to VM.
1 2 28
6, 24
RF
The output current is restricted to the current value set with IOUT = VRF/Rf.
3
VCC
26
7
7
HP
Hall element signal three-phase composite output. Withstand voltage 35 V max.
VCC
8
BR
Brake input pin. "L" for brake and "H" or open for normal rotation.
50 k 3.5 k 8 VCC 50 k 3.5 k 9 VCC 50 k 3.5 k 10
9
PWM IN
PWM pulse input pin. L for output drive and H or open for output OFF
10
F/R
Forward/reverse input pin
Continued on next page.
No. 7229-6/10
LB11920
Continued from preceding page.
Pin No. Pin Function
VCC
Equivalent circuit
11
S/S
Start with L and stop with H or in the open condition
50 k 3.5 k 11
VCC 200 2 k 14 VCC
Start/stop control pin.
12 13
VCC GND1
Control circuit power pin GND pin (control circuit block)
14
PWM
Pin to set the PWM oscillation frequency. Connect a capacitor between this pin and GND.
PWM waveform comparator pin. 15 TOC Normally use with "L" or open. To control the output duty by applying the voltage to this pin without using the PWMIN pin, set the PWMIN pin to "L".
50 k VCC
15
Pin to set the operation time of motor lock protection circuit. 16 CSD Insertion of a capacitor (about 10 F) between CSD and GND enables setting of the protection operation time of about 3.5 sec.
300 500 16
Continued on next page.
No. 7229-7/10
LB11920
Continued from preceding page.
Pin No. Pin Function
VCC
Equivalent circuit
18 17 20 19 22 21
IN1+ IN1- IN2+ IN2- IN3+ IN3- Hall amplifier input. IN+ > IN- is the input high state, and the reverse is the input low state. Connect a capacitor between the IN+ and IN- inputs if there is noise in the Hall sensor signals.
18 20 22 300 300
19
21
23
23 4 27
GND3
SUBGND pin to connect to GND1 that is GND of the control circuit NC pin that can be used for wiring.
NC
LB11920 Function Description 1. Output drive circuit This IC is of a direct PWM drive type that suffers less power loss at the output. On the basis of the signal ("H" level for OFF and "L" level for ON) entered in the PWMIN pin, the lower output Tr performs PWM switching, causing change in the motor drive power. To control by means of the DC voltage, apply the voltage to the TOC pin (in this case, the PWMIN pin should be in the "L" level input condition). The TOC pin voltage is compared with the oscillation voltage of PWM pin, determining the duty. As the TOC pin voltage is lower, the output duty increases. 2. Hall input signal For Hall input, entry of the signal whose amplitude is larger than the hysteresis width (50 mV max) is necessary. Considering effects of noise and phase delay, entry of the amplitude of 120 mVp-p (at differential input) or more is recommended. When noise causes disturbance in the output waveform (at phase switching) or in the HP output (Hall signal threephase composite output), insert a capacitor, etc. as near as possible to the pin between inputs to prevent such effects. The Hall input is used as a signal for judgment of the input of the motor lock protection circuit. Though it is designed to ignore noise to a certain extent, due attention should be paid to check for incorrect operation of the protection circuit. Both upper and lower outputs are OFF when all three phases of Hall input signal are in the common-mode input condition. When the Hall IC output is to be entered, entry of 0 - VCC can be made for another single-side input by fixing either one side (+ or -) of input to the voltage within the common-mode input range with the Hall element used. 3. Current limiting circuit The current limiting circuit performs limiting with the current determined from I = VRF/Rf (VRF = 0.5 Vtyp, Rf: current detector resistance)(that is, this circuit limits the peak current). The control operation functions to reduce the on state duty of the output and thus reduce the current. Switching during current limiting is made on the basis of the frequency oscillated with the PWM pin. The PWM frequency is determined from the capacitance C (F) of capacitor connected to the PWM pin. fPWM 1/ (50000 x C) The PWM frequency of 15k to 25 kHz is recommended. As PWM oscillation is used also as a clock signal of the internal logic circuit, its oscillation is necessary even in the application where current limiting is not needed.
Continued on next page.
No. 7229-8/10
LB11920
Continued from preceding page.
4. Power save circuit This IC enters the power save condition to decrease the current dissipation in the stop mode. In this condition, the bias current of most of circuits is cut off. 5. Forward/backward changeover The motor rotation can be changed over with the F/R pin. Following cautions should be observed when F/R changeover is to be made while the motor is running: * The circuit incorporates a measure against the through current at a time of changeover. However it is necessary to take an appropriate measure to prevent the voltage from exceeding the rated voltage (35 V) because of rising of the VM voltage at changeover (instantaneous return of the motor current to the power supply). When this is a problem, increase the capacitance of a capacitor between VM and GND. * When the motor current after changeover is the current limit or more, the lower Tr is turned OFF. But the upper Tr enters the short-brake condition, and the current determined from the motor counter-electromotive voltage and coil resistance flows. It is necessary to prevent this current from exceeding the rated current (3.5 A). (F/R changeover at high rotation speed is dangerous.) 6. Brake operation Brake operation is made through setting of the BR pin to the "L" level. This operation consists of a short-brake operation in which all of lower outputs are turned OFF while all of upper outputs are turned ON. While the brake is operating, current limiting and motor lock protection circuits are not operative. Apply brake only when the current during operation does not exceed the rated current (3.5 A). The circuit incorporates a measure against the through current at a time of changeover. However it is necessary to take an appropriate measure to prevent the voltage from exceeding the rated voltage (35 V) because of rising of the VM voltage at changeover (instantaneous return of the motor current to the power supply). When this is a problem, increase the capacitance of a capacitor between VM and GND. 7. Motor lock protection circuit A motor lock protection circuit is incorporated for protection of IC and motor when the motor is locked. The lower output Tr is turned OFF when the Hall input signal is not switched for a certain period in the motor drive condition. The time is set by means of a capacity of a capacitor connected to the CSD pin. Time setting of about 3.5 sec is possible for the capacitance of 10 F. (Variance 30%) Set time (s) 0.35 x C (F) Due care must be taken on any leakage current in the capacitor used because it may adversely affect error of the set time, etc. To cancel the motor lock protection condition, one of following steps must be taken: * Stop mode * Maintaining the output duty 0% condition through input of PWMIN or TOC for more than the period of tPWM x 8. (tPWM: IC internal PWM oscillation period) * Power must be applied again (in the stop condition). Connect the CSD pin to GND when the motor lock protection circuit is not to be used. The motor lock protection active period at restart becomes shorter than the setting when the stop time to cancel motor lock protection is shorter because the charge of capacitor cannot be fully discharged. Therefore, it is necessary to provide a certain allowance to the stop period while referring to the following formula as a guideline. Stop time(ms) 15 x C (F) 8. Circuit for low-voltage protection This circuit detects the voltage applied to the VCC pin. When this voltage drops below the operation voltage (see the electric characteristics), the lower side output is turned OFF. To prevent repetition of output ON/OFF near the protection activation voltage, the hysteresis is provided. Accordingly, the output is not recovered unless the voltage rises by about 0.5 V above the activation voltage. 9. HP output For the HP output, the composite signal of three phases of Hall element signal is output. This is an open collector output. This can be used for the motor rotation detection signal, etc.
Continued on next page. No. 7229-9/10
LB11920
Continued from preceding page.
10. Power supply stabilization This IC has a large output current, which causes deviation of the power line readily. To ensure stability, it is necessary to insert a capacitor with sufficient capacitance between the VM pin and GND. To eliminate the highfrequency noise due to switching, insert a ceramic capacitor of about 0.1 F as near as possible to the pin between VM (pin 5) and GND 2 (pin 3). When inserting diode in the power line to prevent breakdown due to reverse connection of power supply, select the sufficiently large capacitance because the power line tends to develop deviation readily. The VCC voltage that is a control power supply must also be fully stabilized by means of a capacitor when such voltage tends to fluctuate because of routing. 11. Routing of a printed circuit board Two pins are provided for each of VM, RF, and GND2 pins where large current flows. On the printed circuit board, both of these pins should be connected and used. If the use of only one pin is possible in certain cases, use pins 3, 5, and 6. GND3 that is a sub-GND (internal separation layer) should be connected with control GND or GND1 with the shortest possible wiring.
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of October, 2003. Specifications and information herein are subject to change without notice. PS No. 7229-10/10

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