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Ordering number: ENN3949D
LB1838M
Monolithic Digital IC
LB1838M Low-saturation, Bidirectional Motor Driver for Low-voltage Applications
Overview
The LB1838M is a low-saturation two-channel bidirectional motor driver IC for use in low-voltage applications. The LB1838M is a bipolar stepper-motor driver IC that is ideal for use in printers, FDDs, cameras and other portable devices.
Package Dimensions
unit : mm
3111-MFP14S
0.625 0.1 1.5 1.8max 0.15
[LB1838M]
14 8
Features
* Low voltage operation (2.5 V min) * Low saturation voltage (upper transistor + lower transistor residual voltage; 0.40 V at 400 mA). * Through-current prevention circuit built in * Separate logic power supply and motor power supply * Spark killer diodes built in * Thermal shutdown circuit built in * Compact package (14-pin MFP)
5.15 6.4 4.4 1 8.0 7 0.35 1.0 1.0
SANYO : MFP14S
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Output applied voltage Input applied voltage Ground pin flow-out current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VS max VOUT VIN IGND Pd max1 Pd max2 Topr Tstg Per channel Independent IC * With board Conditions Ratings -0.3 to +10.5 -0.3 to +10.5 VS+VSF -0.3 to +10 1.0 550 800 -20 to +75 -40 to +125 Unit V V V V A mW mW C C
*Note: Mounted on 20 x 30 x 1.5 mm3 glass epoxy PCB
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.
82599TH(II)/21097HA(II)/O1596HA(II)/4302TS(US)No.3949-1/5 No. 3949-1/5
LB1838M Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage Input high-level voltage Input low-level voltage Symbol VCC VS VIH VIL Conditions Ratings 2.5 to 9.0 1.8 to 9.0 1.8 to 9.0 -0.3 to +0.7 Unit V V V V
Electrical Characteristics at Ta = 25C, VCC = 3 V
Parameter Supply current 1 Supply current 2 Output saturation voltage Input current 1 Input current 2 Output sustaining voltage Spark killer diode reverse current Spark killer diode forward voltage Symbol I CC0 I CC1 VOUT1 VOUT2 I IN IENA VO (sus) IS (leak) VSF Conditions ENA1, 2 = 0 V, VIN 1 = 3 V or 0 V ENA1 = 3 V, VIN 1 = 3 V or 0 V ENA= 3 V, V IN = 3 V or 0 V, I OUT = 200 mA ENA= 3 V, V IN = 3 V or 0 V, I OUT = 400 mA VCC = 6 V, VIN = 6 V VCC = 6 V, ENA = 6 V I OUT = 400 mA VCC1, V S = 7 V I OUT = 400 mA 9 30 1.7 min Ratings typ 0.1 12 0.2 0.4 max 10 18 0.28 0.6 200 200 Unit A mA V V A A V A V
Pin Assignment
Note: Both GND pins should be connected to ground.
Truth Table
IN 1, 2 L H L H ENA 1, 2 H H L L OUT 1, 3 H L OFF OFF OUT 2, 4 L H OFF OFF Mode Forward Reverse Standby Standby
No. 3949-2/5
LB1838M Block Diagram
60k 80k 60k 80k
Thermal shutdown
60k 80k 60k 80k
Note: As long as the voltages applied to VCC ,VS1, VS2, ENA1, ENA2, IN1, and IN2 are within the limits set by the absolute maximum ratings, there are no restrictions on the relationship of each voltage level in comparison with the others (regarding which is higher or lower). (ex. VCC = 3 V, VS1, 2 = 2 V, ENA = IN = 5 V)
Vcont pin
Control
(= constant)
As shown in the above diagram, the Vcont pin outputs the voltage of the band gap Zener VZ +VF (= 1.93 V). In normal use, this pin is left open. The drive current I D is varied by the Vcont voltage. However, because the band gap Zener is shared, it functions as a bridge.
Control
No. 3949-3/5
LB1838M
Allowable power dissipation, Pd max - mW
Specified board (30 x 30 x 1.5 mm3 glass epoxy )
Ambient temperature, Ta - C I IN - VIN Output saturation voltage, VO (sat) - V
Output saturation voltage, VO (sat) - V
Output current, IO - mA VO (sat) - Ta
value
Input current, IIN - A
Input voltage, VIN -V
Ambient temperature, Ta - C
IS - VS
I CC - VCC
For 1 channel
For 1 channel
Current drain, IS - mA
Current drain, ICC - mA
Reverse
Forward
Supply voltage, VS - V
Supply voltage, V CC - V
No. 3949-4/5
LB1838M
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 expor ted without obtaining the expor t license from the author ities 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 August, 1999. Specifications and information herein are subject to change without notice.
PS No. 3949-5/5

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