View LB1820_327678.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Ordering number: EN3302B
Monolithic Digital IC
LB1820
Office Automation-Use
3-Phase Brushless Motor Driver
Overview
The LB1820 is a three-phase brushless motor with a digital speed control circuit built in. The LB1820 is ideally suited for use in office automation applications such as laser beam printers and drum motor drivers.
Package Dimensions
unit: mm 3147C
[LB1820]
28 15
Features
* Three-phase brushless motor driver with digital speed control
function
8.4
* 30 V withstand voltage and 2.5 A output current * Current limiter built in * Low-voltage protection circuit built in * Thermal shutdown circuit built in * Hall amp with hysteresis * Start/stop pin built in * Crystal oscillator and divider built in * Digital speed control circuit built in * Lock detector built in
R1.7
12.7 11.2
1
20.0 26.75
14
(1.81)
1.78
0.6
1.0
SANYO: DIP-28H (500 mil)
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage 1 Maximum supply voltage 2 Output current Allowable power dissipation 1 Allowable power dissipation 2 Operating temperature Storage temperature Symbol VCC VM IO Pd max1 Pd max2 Topr Tstg t100 ms Independent IC With arbitrarily large heat sink Conditions Ratings 30 30 2.5 3 20 -20 to +80 -55 to +150 Unit V V A W W C C
Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage range 1 Supply voltage range 2 Voltage regulator output current Comparator output current Lock detector output current Symbol VCC VM IVH IOSC ILD Conditions Ratings 9.5 to 28 5 to 28 0 to +20 0 to +30 0 to +20 Unit V V mA mA mA
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
10903AS/43096HA (II)/3260TA, TS (GTPS) No.3302-1/7
4.0
4.0
0.4
LB1820 Electrical Characteristics at Ta = 25C, VCC = VM = 24 V
Parameter Supply current 1 Supply current 2 Output saturation voltage Output leak current Voltage regulator Output voltage Voltage variation Load variation Temperature coefficient Hall amp Input bias current Common-mode input voltage Hall input sensitivity Hysteresis width Low-to-high input voltage High-to-low input voltage Oscillator High-level output voltage Low-level output voltage Oscillation amplitude Oscillation frequency Temperature coefficient Comparator output voltage Current limiter Limiter 1 Limiter 2 Thermal shutdown Thermal shutdown temperature Hysteresis width Low-voltage protection voltage Hysteresis width FG amp Input offset voltage Input bias current High-level output voltage Low-level output voltage FG input sensitivity Schmitt width at next stage Operating frequency range Open-loop voltage gain Speed discriminator High-level output voltage Low-level output voltage Maximum clock frequency Number of counts Integrator Input offset voltage Input bias current High-level output voltage Low-level output voltage Open-loop gain Gain-bandwidth product Reference voltage Symbol ICC1 ICC2 VO (sat)1 VO(sat)2 IO leak VH VH1 VH2 Conditions Stop mode IO = 1 A IO = 2 A min typ 33 3 2.1 3.0 max 50 5 3.0 4.2 100 4.5 150 150 Unit mA mA V V A V mV mV mV/ C A V mVp-p mV mV mV V V V kHz %/ C V V V C C V V mV A V V mV mV kHz dB V V MHz 2048 +10 +0.4 4.9 1.2 mV A V V dB MHz V
IVH = 10 mA VCC = 9.5 to 28 V IVH = 5 to 20 mA
3.8
4.15 60 60 -2 1
IHB VICM VIN VSLH VSHL VOH(CR) VOL(CR) f f VOSC VRf1 VRf2 TSD TSD VLVSD VLVSD VIO(FG) IB(FG) VOH(FG) VOL(FG) Design target, Note 1 R = 30 k, C = 1500 pF IOSC = 20 mA
1.5 100 24 8 -25 2.9 0.9 1.8
4 2.8 42 32 -1 3.5 1.3 2.4
33 20 -13 3.2 1.1 2.1 18.5 0.1
1.5 0.42 0.4 150 0.5 0.44 180 30 8.1 0.6 0.6 0.48
7.5 0.45 -10 -1 5.6 5
8.7 0.75 +10 +1 6.8 1.5
IFG = -2 mA IFG = 2 mA 10 x Gain
6.2 1 16
5 60 VOH(D) VOL(D) 1.0 2044 VIO(INT) IB(INT) VOH(INT) VOL(INT) -10 -0.4 3.7 60 -5% 1.6 V5/2 5% 4.7 0.3 2046
4.3 0.8
Note 1: For parameters which have an entry of "design target value" in the "Conditions" column, no measurements are made.
Continued on next page.
No.3302-2/7
LB1820
Continued from preceding page.
Parameter 5 V supply Lock detector Low-level output voltage Lock range Start/stop pin Start/stop operating voltage Crystal Oscillator Precision of oscillating frequency Temperature coefficient Drift in rotational speed Referenced to indicated frequency -500 -3 0.01 +500 ppm ppm/ C % 0.4 0.5 0.6 V VOL(LD) ILD=10 mA 3.125 0.5 V % Symbol V5 Conditions min 4.6 typ 5 max 5.4 Unit V
Truth Table
Source Sink 1 2 3 4 5 6 OUT3 OUT2 OUT3 OUT1 OUT2 OUT1 OUT2 OUT3 OUT1 OUT3 OUT1 OUT2 Input IN1 H H H L L L IN2 H L L L H H IN3 L L H H H L
Pin Assignment
INTOUT FGOUT FGIN+ FGIN-DOUT INTIN
IN1+
IN2+
28 27 26 25 24 23 22 21 20 19 18 17 16 15
LB1820
1
OSC
IN3+
IN1--
IN2--
IN3--
X'tal
LD
2
VCC
3
CR
4
C
5
NC
6
OUT1
7
NC
8
OUT2
9
NC
10 11 12 13 14
OUT3 5V GND Rf VM
Top view
ILB00707
24
Pd max -- Ta
Allowable power dissipation, Pd max -- W
20
With arbitrarily large heat sink
16
12
8
4 3 0 --20
Without heat sink
0
20
40
60
80
100
120
Ambient temperature, Ta -- C
ILB00708
No.3302-3/7
4V
+
VCC
START / STOP
+
FGOUT VCC
DOUT
INT IN C CR
INT OUT
OSC -+ Speed Discriminator -INT + 2.5V
+
--Comp + OSC
FG IN--
+
Internal Equivalent Circuit Block Diagram
FG IN+
Reg
7V 0.4V LD
Current Limiter2
+
LB1820
5V TSD Divider LVSD
0.5V
-VM
Current Limiter1 0.5V
X'tal
OSC
OUT1 driver Logic OUT3 OUT2
+
--
1.2V
GND LD 4V
IN1
IN2
IN3
Rf
ILB00709
No.3302-4/7
LB1820 Pin Description
Pin No. 19, 20 17, 18 15, 16 6 8 10 2 12 11 14 3 1 24 25 23 4 22 27 26 28 21 13 Pin Name IN+1, IN-1 IN+2, IN-2 IN+3, IN-3 OUT 1 OUT 2 OUT 3 VCC VM Rf GND CR OSC INTOUT INTIN DOUT C LD FGIN- FGIN+ FGOUT Xtal 5V Functions OUT1: Hall element input pins for Phase 1. ``H'' logic is the state when IN+ > IN-. OUT2: Hall element input pins for Phase 2. ``H'' logic is the state when IN+ > IN-. OUT3: Hall element input pins for Phase 3. ``H'' logic is the state when IN+ > IN-. Output pin 1. Output pin 2. Output pin 3. Power supply for other than output blocks. Power supply for output blocks. Output current detection pin. Rf is connected across this pin and GND to detect the output current as voltage. Ground for other than output blocks. The lowest potential of output transistor is the voltage at Rf pin. Sets the oscillating frequency of the switching regulator. Outputs duty-controlled pulses. Open-collector output. Integrator output pin (speed control pin). Varies the switching regulator output voltage. Integrator input pin. Speed discriminator output pin. Goes LOW when the specified speed is exceeded. Suppresses ripples in the motor current during operation of current limiter 2. Lock detection pin. Goes HIGH when the motor rotation speed is within the locking range. FG pulse input (Start/Stop control) pin. FG pulse input (4 V supply) pin. FG amp output pin. Crystal oscillator connecting pin. 5 V supply pin.
No.3302-5/7
LB1820
Operation Notes
Speed Control Circuit This IC uses a speed discrimination circuit to perform speed control. The rotation accuracy of the speed discrimination method depends on the counter count. The counter count in this IC is 2046. On the FG1 cycle, a speed error signal with a resolution of 1/2046 is output from the DOUT pin (charge pump method). The DOUT output shifts among three states: high, high impedance, and low: High : Output S (acceleration signal) High impedance : When neither output S nor output F is output Low : Output F (deceleration signal) The relationship between the FG frequency (fFG) and the quartz oscillation frequency (fOSC) can be calculated as follows: fFG = fOSC / (ECL division ratio x count) fOSC / (8 x 2046) fOSC / 16368 PAM Drive System This IC controls motor rotations by configuring an external switching regulator, and controlling the voltage (VM) of the regulator. Select a switching regulator diode with a short reverse recovery time such as an FRD (First Recovery Diode). Because even a smooth coil can become a noise source, attention must be paid to the arrangement of components on the board (especially avoiding the effects of FG signal lines and integrated amplifiers). Select a normal rectifier diode for the upper and lower motor drive pin section (OUT1 to 3). Current Limiter Circuit The current limiter circuit consists of two limiter circuits. 1 Limiter 1 Detection voltage VRf1 = 0.5 V typ. Current is limited by putting the lower output transistor in the nonsaturated state and then dropping the voltage applied to the motor. 2 Limiter 2 Detection voltage VRf2 = 0.44 V typ. The VM voltage is limited by limiting the OSC pin ``on duty'' ratio. Normally, if an excessive load is put on the motor, limiter 1 operates first, and after a delay in the switching regulator, limiter 2 operates. Sometimes, after startup, the ASO of the output transistor is very severe. In such a case, it is necessary to perform a soft start (in which VM is increased gradually). When using soft starts, connect a capacitor between the pin (VM, 5 V, etc.) on which the voltage is to be increased during startup and the C pin. If soft starts are not to be used, connect a capacitor between the C pin and ground. Speed Lock Range The speed lock signal is output from the LD pin. The speed lock range is within 3.13%; if the motor rotations fall within the lock range, the LD pin goes low (open collector output). Start/stop Operation The FGIN- pin also serves as the start/stop pin. When the FGIN- pin is connected to a transistor, etc., and the voltage is 0.5 V typ or less, the stop state goes into effect. In the stopped state, in addition to the drive outputs being turned off, the FGIN+, 5 V, and other regulator outputs are also turned off. When it is necessary to drive the motor at high speed, improvement is possible by adding a resistor (of approximately 1 M) between FGOUT and VCC. (The time from when the transistor is turned off until FGIN- goes to 0.5 V is reduced.) Initial Reset Operation At startup, it is possible to apply an initial reset to the logic circuits by delaying the increase in voltage on FGIN-. If an initial reset is not applied, the LD pin may go low from start until the FG pulse is input to the logic circuits (until output of approximately 16 mVp-p is generated on FGOUT). When an FG reset is applied, the capacitor between the FGIN+ and GND should be 4.7 F or more (in order to delay the rise in FGIN-). Caution is required, because if the FG amplifier input capacitor is too small and the feedback capacitor is too large, the reset time will be shorter. At start, a delay of about 5 s or more from the rising edge of the 5 V regulator output until the FGIN- voltage goes to 1.2 V is desirable.
No.3302-6/7
LB1820 PWM Frequency Setting The PWM frequency is determined by the resistor and capacitor connected to the CR pin. When a resistor is connected to the FGIN+ pin, the PWM frequency can be roughly calculated by the following formula: fPWM 1 / (1.2 x C x R) The resistor must not be less than 30 k. It is desirable for the PWM frequency to be about 15 kHz. Quartz Oscillator An oscillator, capacitor and resistor are to be connected to the quartz oscillator. When selecting the oscillator and the external capacitor and resistor, always obtain approval from the manufacturer of the oscillator in order to avoid problems. (Circuit with external quartz oscillator)
X'tal
External constants (reference values)
Xtal (MHz) 3 to 4 4 to 5 C1 (pF) 39 39 39 39 C2 (pF) 82 82 47 27 R (k) 0.82 1.0 1.5 2.0
X C1
R C2
ILB00710
5 to 7 7 to 10
However, use a crystal such that the base wave fO impedance : 3fO impedance = 1 : 5 or more
When inputting external signals (of several MHz) to the quartz oscillator, connect external components as shown in the diagram below. 5V pin fIN = 1 to 8 MHz Input signal level High level voltage: 4.0 V min. Ra Low level voltage: 1.5 V max. Xtal pin Ra = 2 k, Rb = 1 k (reference values) Rb
Input
ILB00711
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 January, 2003. Specifications and information herein are subject to change without notice.
PS No. 3302-7/7

▲Up To Search▲

Price & Availability of LB1820

	To Download LB1820 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .