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Ordering number:EN3295
Monolithic Digital IC
LB1693
3-Phase Brushless Motor Driver
Overview
The LB1693 is a driver IC for 3-phase brushless motors. It is ideally suited for office automation equipment and DC fan motors.
Package Dimensions
unit:mm 3037A-DIP20H
[LB1693]
Features
* 3-Phase brushless motor driver. * 45V withstand voltage and 2.5A output current. * PWM switch regulator control section. * Current limitter. * Overvoltage and overcurrent protection circuit. * Thermal shutdown cirucit. * Hall amp with hysteresis characteristic.
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Maximum Output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VM max IO Pd max Topr Tstg Independent IC With infinte heat sink Conditions
SANYO : DIP20H
Ratings 45 45 2.5 3 20 -20 to +80 -55 to +150
Unit V V A W W
C C
Allowable Operating Conditions at Ta = 25C
Parameter Supply voltage Voltage regulator output current VH supply voltage Comparator output current Symbol VCC VM IVH VH IOSC Conditions Ratings 9 to 36 VH to 41 0 to 20 4.5 to 5.5 0 to 30 Unit V V mA V 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 Bussiness Headquaters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
83198HA (KT)/4250TA, TS(GTPS) No.3295-1/9
LB1693
Electrical Characteristics at Ta = 25C, VCC=VM=24V
Parameter Supply current Output saturation voltage Output leakage current Voltage regulator output voltage Voltage regulator load fluctuation Voltage regulator load fluctuation Voltage Regulator temperature coefficient [Hall amp] Input bias current Common-mode input voltage range Hysteresis width Low to high input voltage High to low input voltage Oscillator High-level output voltage Low-level output voltage Oscillation frequency Amplitude Temperature coefficient Comparator Output voltage Rising time Falling time Forward/Stop/Reverse Forward Stop Reverse Brake operation off Brake operation on Current limiter Limiter1 Lmiter2 Overvoltage protection votlage Hysteresis width Thermal shutdown temperature Hysteresis width Low-voltage protection voltage Hysteresis width Upper diode voltage VRf1 VRf2 VOVSD VOVSD TSD TSD VLVSD VLVSD VF IO=1A 3.6 0.04 0.8 Design target 0.42 0.34 38 0.8 150 0.5 0.4 42 1.3 180 25 4.0 0.11 2.8 4.4 0.18 4.7 0.6 0.48 44.5 1.8 V V V V VFSR1 VFSR2 VFSR3 VBR1 VBR2 2.1 4.2 2.0 0 2.5 5.0 0.8 0.8 2.9 V V V V V VOSC tr tf IOSC=30mA 1.1 0.5 0.5 1.5 V s s f f R=36k, C=4700pF 2.1 3.45 1.0 10 2.45 0.1 2.8 V V kHz Vp-p VIN VSLH VSHL IHB 1.5 28 8 -32 38 20 -20 1 4 VH-1.8 46 32 -8 A V mV mV mV Symbol ICC1 ICC2 VO sat1 VO sat2 IO leak VH VH1 VH2 IVH=10mA VCC=9.5 to 36V IVH=0 to 20mA 6.5 7.0 70 140 -2 Stop mode Hall current=5mA IO=1A, VO(sink)+VO(source) IO=2A, VO(sink)+VO(source) Conditions Ratings min typ 5 15 2.1 3.0 max 8 21 3.0 4.2 100 7.5 200 250 Unit mA mA V V A V mV mV
mV/C
%/C
C C
V V V
No.3295-2/9
LB1693
Pin Assignment
Pin Description
Pin Name IN1+, IN1- IN2+, IN2- IN3+, IN3- OUT1 OUT2 OUT3 VCC VM Rf GND Pin No. 17, 18 OUT1:Hall element input pins for Phase 1. High logic is the state when IN1+ > IN1-. OUT2: Hall element input pins for Phase 2. High" logic is the state when IN1+ > IN1-. OUT3: Hall element input pins for Phase 3. High logic is the state when IN1+ > IN1-. Output pin for Phase 1. Output pin for Phase 2. Output pin for Phase 3. Power supply pin for applying voltage to each section other than output section. Power supply for output section. Output current detect pin; Rf is inserted between this pin and ground to detect the output current as a voltage. Ground for other output The minimum potential of output transistor is at the Rf pin. Brake pin The brake is switched on/off by setting this pin high (2V or more)/low (0.8V or less). Forward/Stop/Reverse control pin. The motor is driven forward, stopped, or driven in reverse according to the voltage at this pin. Forward : 0 to 0.8V Stop : 2.1 to 2.9V Reverse : 4.2 to 5.0V Power pin for Hall elements When using the internal (stabilized) power supply : VH=7V typ. When using the external (stabilized) power supply : VH=5V typ. Sets the oscillation frequency for the switching regulator/ Outputs duty-controlled pulsed ; open collector output. Speed control pin ; varies the swithcing regulator output votlage. Suppresses ripples in the motor current during operation of current limiter 2. Description
15, 16
13, 14 6 7 8 11 10 9 12
BR FSR
19 20
VH
5
CR OSC VCONT C
1 2 3 4
No.3295-3/9
LB1693
Truth Table
Block Diagram and Peripheral Circuit Diagram PWM control (1)
No.3295-4/9
LB1693
PWM control (2)
No.3295-5/9
LB1693
VCC=VH=5V PMW control
No.3295-6/9
LB1693
VCC=5V, VM are No speed control
1. Switching regulator oscillation circuit (PWM generation circuit) 1-1. Oscillation circuit (40 to 50kHz max.) Figure 1 shows the oscillation circuit that generates the triangular waves. The oscillation frequency for this circuit is detemined by the following equation (with VH=7V typ.) f= 1 (Hz) t0 + t1
t0~0.56CR (charging) t1~1.34CRN (discharging) (RN is the internal resistance of 1.4k approx.) In actual applications, R >> RN is used to suppress the influence of variation in the IC's internal resistance.
Figure 1
Oscillation Circuit
No.3295-7/9
LB1693
1-2. Comparator circuit Figure 2 shows the comparator circuit for comparing the triangular wave output, the speed control signal, etc. input terminals CR Input the triangular wave output. VCONT Input the speed control signal. C Goes high when current limiter 2 is operating. (When VC(H) > VCR(H), the OSC output is off.)
Figure 2
Comparator Circuit
2. Position detection circuit (Hall element input circuit) The position detection circuit is a differential amp with hysteresis (38mV typ.). For the operating DC level, use within the common-mode phase input voltage range (1.5 to VH-1.8V). Also it is recommended that the input level is at least three times (150 to 200mVp-p) the hysteresis. 3. VH power supply circuit The VH power supply pins can be used to from the internal power supply or an external power supply. When using the internal power supply, the internal logic operates with VH=7V typical (VCC=24V). When using an external power supply, set VCC=VH=5V and operate the internal logic at 5V. 4. Current limiter circuits 4-1. Current limiter 1 The current is limited by moving the sink side transistor from saturated to undaturated, so ASO can be a problem. I= VRf1 Rf
(A)
Therefore, design so that as much as possible current limiter 1 is not triggered. Also, take particular care not to exceed the maximum output current (2.5A) when current limiter 1 is triggered. 4-2. Current limiter 2 This circuit limits the current by lowering the PWM output duty, thus lowering the VM voltage. When current limiter 2 is triggered, the output current is no greater than 2A. I= VRf2 Rf
When not controlling the PWM, add a current limiter to the VM power supply. (A current setting no greater than 60% to 70% of the current value of current limiter 1 and a short delay time are recommended.) 5. Protection circuits 5-1. Overvoltage protection circuit If the voltage at the VCC pin rises above the regulated votlage (38V), PWM output is inhibited and the sink side output driver is switched off. 5-2. Low-votlage protection circuit If the voltage at the VCC pin falls below the regulated voltage, just as in 5-1, PWM output is inhibited and the sink side output driver is switched off. 5-3. Thermal shutdown circuit If the junction temperature rises above the regulated temperature, just as in 5-1, PMW output is inhibited and the sink output driver is switched off.
No.3295-8/9
LB1693
6. Minimum voltage at VM power Use a voltage greater than the VH voltage for the VM power supply votlage VMVH
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 and all SANYO products described or contained herein fall under strategic products (including services) controlled under the Foreign Exchange and Foreign Trade Control Law of Japan, such products must not be exported without obtaining export license from the Ministry of International Trade and Industry 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 August, 1998. Specifications and information herein are subject to change without notice.
PS No.3295-9/9

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