Ordering number: EN7258 Monolithic Linear IC LA5636M DC/DC Converter Secondary Side Control IC Overview Package Dimensions The LA5636M is a DC/DC Converter Secondary Side Control IC that draws power from a car battery and is ideal for use in rechargers for lithium ion batteries, etc. Because this IC incorporates only the basic functions (constant voltage control and constant current control) that are needed in an IC for charging, it can be easily used in combination with other ICs for charging. unit: mm 3086B [3086B] 1 5 0.15 0.1 (1.5) • Includes integrated circuitry for preventing the malfunction of the system in the event that the input voltage (car battery voltage) drops. • Produces constant voltage output in proportion to the PWM input signal. (Permits output voltage control by microcontroller.) • High-precision reference current (current control amp): 92.5 µA±2.7% • Output voltage can be set through an external resistor. • Each loop of the voltage amp and current amp is independent. 1.7max 4.4 Features 6.4 6 0.63 5.0 10 0.35 1.0 (0.5) SANYO: MFP-10S(225mil) Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage VCC max 14.5 V Allowable power dissipation Pd max 350 mW DOUT terminal current/voltage PWM input voltage ICONST terminal voltage Idtmax/Vdtmax 1/ –0.2 to VCC mA/V Vpwm –0.2 to 3.0 V V VICONST –0.2 to VCC C1 terminal voltage VC1 –0.2 to VCC V Operating temperature Topr1 –40 to +85 °C Performance garanteed temperature Topr2 –25 to +75 °C Storage temperature Tstg –40 to +150 °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 52303AS (II) No.7258-1/7 LA5636M Electrical Characteristics at Ta = 25°C, VCC=12V Parameter Symbol Ratings Conditions min Operating voltage VCC Current drain ICC typ 10.3 Dout = off, Vpwm = off, R = 27 kΩ Unit max 13.0 4 PWM input high voltage VpwmH 1.7 2.9 PWM input low voltage VpwmL 0 0.8 PWM input current Ipwm Vpwm = 0.0 V V mA 30 V V nA PWM input frequency Fpwm 30 32 37 Hz Reference voltage 1 V-IN1 VCC = 10.5 to 13 V, PWM = L * Ta = –25 to 75°C –4 (1.92 V) 2.0 V +4 (2.08 V) % Reference voltage 2 V-IN2 VCC = 10.5 to 13 V, PWM = H * Ta = –25 to 75°C –6 0.72 V +6 (0.68 V) (0.76 V) % Reference voltage 3 V-IN3 VCC = 8.5 V, PWM = L * Ta = –25 to 75°C 1.56 — — V Reference voltage 4 V-IN4 VCC = 8.5 V, PWM = H * Ta = –25 to 75°C 0.59 — — V Reference current IREF VCC = 10.5 to 13 V, when 27 kΩ is connected * Ta = –25 to 75°C 90.0 92.5 95.0 µA Allowable power dissipation Pd max – W * The design is guaranteed over the temperature range, so the temperature is not measured. Pd max -- Ta 1.0 0.8 With specified board 0.80 0.6 0.4 0.42 IC alone 0.35 0.2 0.18 Specified board 76.1 × 114.3 × 1.6 mm3 Glass epoxy resin 0 --40 --20 0 20 40 60 80 Ambient temperature Ta – °C 100 ILA00995 Pin Assignment GND 1 10 V+IN ICONST 2 9 V-IN DOUT 3 PWM 4 LA5636M 8 C1 7 VCC 5 ISEN+IN 6 ISEN-IN Top view No. 7258-2/7 LA5636M VCC -- ICC 4.0 VCC -- V-IN1, V-IN2 2.5 Current drain ICC – mA 3.5 I CC 3.0 Ta=25°C Reference voltage 1 V-IN1 – V Reference voltage 2 V-IN2 – V Ta=25°C 2.5 2.0 1.5 1.0 0.5 0 1.5 1.0 V-IN2 0.5 0 0 5 10 15 Supply voltage VCC – V 20 Reference voltage 1 V-IN1 – V Reference voltage 2 V-IN2 – V 94.0 Iref 93.5 93.0 92.5 92.0 91.5 91.0 90.5 0 50 8 100 Ambient temperature Ta – °C 150 ILA00998 13 18 Supply voltage VCC – V ILA00997 Ta -- V-IN1, V-IN2 2.5 94.5 90.0 --50 3 ILA00996 Ta -- Iref 95.0 Reference current Iref – µA V-IN1 2.0 V-IN1 2.0 1.5 1.0 V-IN2 0.5 0 --50 0 50 100 Ambient temperature Ta – °C 150 ILA00999 No. 7258-3/7 1 33kΩ 13kΩ 10kΩ R2 Tr5 Tr6 R3 R1 Tr4 Tr3 Tr2 Tr1 – + X2 R4 200kΩ 9 10 3 8 C1 30kΩ R5 – + X1 7 Isen+IN Vref 2.5V ±1% 2.0V R7 R6 R9 R8 1.6kΩ R10 + – Isen-IN 6 Tr13 X4 Tr7 – + X3 X5 – + 1.25V Tr10 Tr8 R11 100kΩ Tr12 Tr11 Tr9 2 ICONST 4 PWM Block Diagram GND Vcc 5 V-IN V+IN DOUT LA5636M No. 7258-4/7 GND 12V/24V IN + + + 1 2 9 PWM 4 8 ISEN-IN C1 LA5636M GND ICONST V-IN 3 DOUT 6 V+IN 10 7 ISEN+IN 5 Vcc RB RA + Batt GND Nickel hydride battery Lithium ion battery OUT LA5636M Application Circuit Diagram 1 (DC Mode) 1. OUT voltage can be set as desired by varying RA and RB. f f No. 7258-5/7 GND 12V/24V IN + 3V 0% 7.8V + 1 2 100% Output voltage vs Duty Ratio Duty 4 3V PWM 8 Signal applied to PWM input Duty ratio variable at 30Hz 0V 9 ISEN-IN 6 C1 LA5636M GND ICONST V-IN 3 DOUT V+IN 10 7 ISEN+IN 5 Vcc A/D1: Output current (Limit value for completion of charging) A/D2: Output voltage (Limit value for completion of charging) PWM: Refer to the diagram below for the relationship between the duty ratio and the output voltage + PWM GND A/D1 Microcontroller + Batt A/D2 GND Nickel hydride battery Lithium ion battery VOUT LA5636M Application Circuit Diagram 2 (PWM Mode) No. 7258-6/7 Outpu voltage (VOUT) LA5636M 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 May, 2003. Specifications and information herein are subject to change without notice. PS No. 7258-7/7