LB1948M

LB1948M_09 SANYO | Alldatasheet

Document overview

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Technical content

Features

• Supports 12V power supply systems
• Low saturation voltage: VO(sat) = 0.5V (typical) at IO = 400mA
• Zero current drawn in standby mode
• Braking function
• Supports parallel connection: IO max = 1.6A, VO(sat) = 0.6V (typical) at IO = 800mA
• Built-in spark killer diode
• Built-in thermal shutdown circuit
• Miniature package: MFP-10S (6.4mm × 5.0mm) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage V CC max -0.3 to +20 V Output voltage VOUT -0.3 to +20 V Input voltage VIN -0.3 to +18 V Ground pin source current I GND Per channel 800 mA Pd max1 Independent IC 350 mW Allowable power dissipation Pd max2 Mounted on a specified board* 870 mW Operating temperature Topr -20 to +85 °C Storage temperature Tstg -40 to +150 °C * Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board. Monolithic Digital IC 12V Low Saturation Voltage Drive Forward/Reverse Motor Driver http://semicon.sanyo.com/en/network

No.7714-2/6 Allowable Operating Range at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage V CC 2.5 to 16 V Input high-level voltage V IH 1.8 to 10 V Input low-level voltage V IL -0.3 to +0.7 V Electrical Characteristics at Ta = 25°C, VCC = 5V Ratings Parameter Symbol Conditions min typ max Unit ICC0 IN1, 2, 3, 4 = 0V (Standby mode) 0.1 10 µA ICC1 *1 (Forward or reverse mode) 15 21 mA Current drain ICC2 *2 (Brake mode) 30 40 mA VO(sat)1 I OUT = 200mA (High Side and Low Side) 0.25 0.35 V Output saturation voltage VO(sat)2 I OUT = 400mA (High Side and Low Side) 0.50 0.75 V Input current I IN V IN = 5V 85 110 µA Spark Killer Diode Reverse current I S(leak) 30 µA Forward voltage V SF I OUT = 400mA 1.7 V *1:IN1/IN2/IN3/IN4=H/L/L/L or L/H/L/L or L/L/H/L or L/L/L/H. *2:IN1/IN2/IN3/IN4=H/H/L/L or L/L/H/H. Package Dimensions unit : mm (typ) 3086B Pin Assignment 1VCC 2IN1 3IN2 4IN3 5IN4 OUT1 OUT2 OUT3 OUT4 GND LB1948M Top view SANYO : MFP10S(225mil) (0.5) 1.7max 1.00.35 5.0 0.15 6.4 (1.5) 0.1 4.4 0.63 -20 0 20 40 60 80 1000 1.0 0.8 0.6 0.4 0.2 Pd max -- Ta 0.87 0.35 0.45 0.18 Ambient temperature, Ta -- °C Allowable power dissipation, Pd max -- W Specified board: 114.3×76.1×1.6mm3 glass epoxy board. Independent IC

No.7714-3/6 Truth Table Input Output IN1 IN2 IN3 IN4 OUT1 OUT2 OUT3 OUT4 Notes L L L L OFF OFF OFF OFF Standby mode L L OFF OFF Standby mode H L H L Forward L H L H Reverse H H L L 1CH Brake L L OFF OFF Standby mode H L H L Forward L H L H Reverse H H L L 2CH Brake Block Diagram VCC IN1 IN2 IN3 IN4 OUT1 OUT2 OUT3 OUT4 GND M M 60kΩ 80kΩ 60kΩ 80kΩ 60kΩ 80kΩ 60kΩ 80kΩ 10µF Control block Thermal shutdown circuit

No.7714-4/6 Design Documentation (1) Voltage magnitude relationship There are no restrictions on the magnitude relationships between the voltages applied to VCC and IN1 to IN4. (2) Parallel connection The LB1948M can be used as a single-channel H-bridge power supply by connecting IN1 to IN3, IN2 to IN4, OUT1 to OUT3, and OUT2 to OUT4 as shown in the figure. (IOmax = 1.6A, VO(sat) = 0.6V (typical) at IO = 800mA) 1V CC

2 IN1

3 IN2

4 IN3

5 IN4

M (3) Observe the following points when designing the printed circuit board pattern layout.

• Make the VCC and ground lines as wide and as short as possible to lower the wiring inductance.
• Insert bypass capacitors between VCC and ground mounted as close as possible to the IC.
• Resistors of about 10KΩ must be inserted between the CPU output ports and the IN1 to IN4 pins if the microcontroller and the LB1948M are mounted on different printed circuit boards and the ground potentials differ significantly. Thermal Shutdown Temperature (1) Thermal shutdown temperature The thermal shutdown temperature Ttsd is 200 ± 20°C with fluctuations. (2) Thermal shutdown operation The operation of the thermal shutdown circuit is shown in the figure below. When the chip temperature Tj is in the direction of increasing (solid line), the output turns off at approximately 200°C. When the chip temperature Tj is in the direction of decreasing (dotted line), the output turns on (returns) at approximately 125°C. 100 120 140 160 180 200 220 VCC = 12V 100°C 220°C 220°C 100°C Return TSD operation Chip temperature, Tj -- °C Output voltage, VO -- V LB1948M Thermal shutdown reference chart

No.7714-5/6 Thermal Shutdown Circuit Block Diagram Vref Reference voltage circuit Thermal shutdown circuit Drive circuit Function equivalent circuit Note: The above is an example of thermal shutdown circuits although there are some differences from the actual internal circuit. Thermal Shutdown Operation The thermal shutdown circuit compares the voltage of the heat sensitive element (diode) with the reference voltage and shuts off the drive circuit at a certain temperature to protect the IC chip from overheating. ICC -- VCC IIN -- VIN VO(sat) -- IO ICC -- Ta 0 5 10 15 20 0 5 10 15 20 400 100 200 300 0.6 0.1 0.3 0.5 0.2 0.4 0 100 200 300 400 500 600 -40 -20 0 20 40 60 80 100 120 140 VIN = 5V (= IN1 / IN2 or IN3 / IN4) H / H H / L, L /H L / L VCC = 12V IN1~4 VCC = 12V VCC = 12V (IN1 / 2) H /H H / L, L /H Current drain, ICC -- mA Supply voltage, VCC -- V Input current, IIN -- µA Input voltage, VIN -- V Output saturation voltage, VO(sat) -- V Current drain, ICC -- mA Output current, IO -- mA Ambient temperature, Ta -- °C High side and Low side

PS No.7714-6/6 SANYO Semiconductor Co.,Ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ra tings, operating condition ranges, or other parameters) listed in products specif ications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-qual ity high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to acci dents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. When designing equipment, adopt safety measures so that these kinds of accidents or e vents cannot occur. Such measures include but are not limited to protective circuits and error prevention c ircuits for safe design, redundant design, and structural design. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable f or any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. Information (including circuit diagr ams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equi pment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. In the event that any or all SANYO Semiconductor C o.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require 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 in formation storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. 0.1 0.2 0.3 0.4 0.5 0.7 0.6 0 40 80 12020 60 100 140 VCC = 12V High side and Low side IO = 400mA 300mA 200mA 100mA VO(sat) -- Ta -20-40 Output saturation voltage, VO(sat) -- V Ambient temperature, Ta -- °C This catalog provides information as of December, 2008. Specifications and inform ation herein are subject to change without notice.