STK740-470

Ordering number:EN*6107 Thick Film Hybrid IC STK740-470 5V/5A Single Output Separate Excitation Chopper Regulator Preliminary Overview The STK740-470 is a separate-excitation step-down chopper regulator hybrid IC for the secondstage circuit. This IC incorporates in the package all the necessary circuits for a chopper regulator including power switch, error amplifier, soft start, shutdown type output short protection, low-voltage malfunction prevention, on/off, and snubber circuits. Therefore, external components required are input and output capacitors and a choke coil only and this allows this IC to be used to construct a large-current (5A) chopper regulator as if a 3-pin regulator were used. DC8V to 18V input voltage can be handled and up to 5A of output current is supported. Package Dimensions unit:mm 4170-SIP28 [STK740-470] 46.6 41.2 8.5 12.7 1 2.54 (6.63) 4.0 12 0.5 1.0 3.6 25.5 0.4 2.9 Applications • Local power supply for the equipment of which input rating is DC9V to 15V. 11×2.54=27.94 SANYO : SIP-28 Features • Adoption of Sanyo IMST ; Insulated Metal Substrate Technology, allows the circuit to be operated without using a heat sink (see “No Fin Output Current Derating” chart in the page 6). • Typical efficiency of 90% at DC 12V input, 2.5A output. • Fine adjustment of output voltage enable. • 50 kHz operating frequency. • Low-RON resistance power MOSFET adopted. • Low-VF Schottky barrier diode adopted. 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 63099RM (KT) No.6107–1/10 STK740-470 Series Construction This product is listed in a product series due to its property such as output voltage, output current, package, and other similar items. Since some prducts listed in the table below is under development, please refer to your Sanyo sales representative for details. Type number ∗ ∗ STK740-411 STK740-420 STK740-441 4 to 8V STK740-450 STK740-471 STK740-470 8 to 18V STK740-480 STK740-490 * : Under planning 5.0V 10A 15A 25.5 × 46.6 × 8.5mm,12pins 25.5 × 46.6 × 8.5mm,12pins 3.3V 10A 5A 5A Input voltage Output voltage Output current 4 to 8V 4 to 8V 2.5V 2.5V 5A 10A 5A Package dimensions (output pins not included) 26 × 37 × 4.5mm,12pins 25.5 × 46.6 × 8.5mm,12pins 26 × 37 × 4.5mm,12pins 25.5 × 46.6 × 8.5mm,12pins 26 × 37 × 4.5mm,12pins 25.5 × 46.6 × 8.5mm,12pins Specifications Maximum Ratings at Ta = 25˚C, Tc = 25˚C, unless otherwise specified. Parameter Operating IC substrate temperature Operating temperature Storage temperature DC input voltage Symbol Tc max Topr Tstg VIN max Pins 6, 11, and 12 Conditions Ratings +105 –10 to +85 –30 to +115 20 Unit ˚C ˚C ˚C V Recommended Operating Conditions at Ta = 25˚C Parameter Operating IC substrate temperature DC input voltage Load current Symbol Tc VIN Io In the recommended circuit In the recommended circuit Conditions Ratings 0 to +85 8 to 16 1 to 5 Unit ˚C V A Electrical Characteristics at Tc = 25˚C, in the specified circuit, VIN = 12V, IO = 1A, unless othrwise specified Parameter Output voltage Line regulation Load regulation Efficiency Operating frequency Cutoff current On/off circuit Output voltage temperature coefficient Symbol Vo ∆VL ∆VO η fosc ICUT Voff TCVO 6pin, latch mode 1pin Tc=+25 to +85˚C VIN=8V to 16V Io=1A to 5A Io=2.5A Conditions Ratings min 4.9 – – – 45 – – – typ 5.0 100 100 90 50 1.6 0.22 ±1.7 max 5.1 – – – 55 – 0.32 Unit V mV mV % kHz mA V – mV/˚C No.6107–2/10 STK740-470 Block Diagram 12 VIN VCC 11 6 Reference voltage Drive circuit TR1 D1 10 9 8 OUT Snubber circuit 7 Error amplifier PWM A VS VADJ 2 3 GND 5 SUB Low-voltage malfunction prevention circuit Phase compensation 4 On/off circuit Soft start circuit FB 1 ON/OFF Oscillator Short protection circuit Pin Descriptions Number 1 2 3 4 5 6 7, 8 9, 10 11, 12 Pin name ON/OFF VS VADJ FB GND VCC A OUT VIN Remote on/off switching Output voltage sensing Output voltage fine adjustment Feedback (error amplifier output), phase compensation Ground Power supply for control block Flywheel diode anode Output Input supply voltage Description No.6107–3/10 STK740-470 Test Circuit 12 11 10 9 8 76 54 3 21 ON/OFF Vo adjust DC INPUT C1 FB L1 C2 OUTPUT (5V) GND C1 C2 L1 FB : 47µF/25V (OS capacitor) : 1000µF/16V×2 : 30µH : Ferrite-bead core GND Overvoltage Protection Circuit In a constant-voltage power supply circuit output voltage may generally exceed the stipulated rating (equivalent to input voltage) when the circuit is broken down or the IC and the printed circuit board is wrongly soldered. Therefore overvoltage protection circuit is recommended to use to minimize the damages caused by the overvoltage. Sample the overvoltage protection circuit FUSE DC INPUT Regulator OUTPUT SCR GND CR GND No.6107–4/10 STK740-470 Sample Characteristics at Ta = 25˚C, in the test circuit Output Voltage vs.Output Current 5.4 5.2 Output Voltage Vo[V] VIN =15V VIN =12V 5.0 VIN =9V 4.8 4.6 0 1 2 3 Output Current Io[A] 4 5 6 Efficiency vs.Output Current 100 90 VIN=9V VIN=12V VIN=15V Efficiency η[%] 80 70 60 50 0 1 2 3 Output Current Io[A] 4 5 6 No.6107–5/10 STK740-470 Output Voltage vs.Input Voltage 5.4 Io=5A 5.2 Output Voltage Vo[V] 5.0 4.8 4.6 5 10 Input Voltage V IN[V] 15 20 No Fin Output Current Derating 6.0 5.0 Output Current Io[A] 4.0 3.0 2.0 VIN=9V VIN=12V VIN=15V 1.0 0.0 -10 0 10 20 30 40 50 60 70 Ambient Temperature Ta[°C] 80 90 100 No.6107–6/10 STK740-470 No Fin ∆Tc vs.Output Current 70 60 50 40 30 20 10 0 0 1 2 3 Output Current Io[A] 4 5 VIN=15V VIN=12V VIN=9V ∆Tc[deg.] 6 Power Dissipation vs Output Current 4.0 VIN=15V Power Dissipation PD [W] 3.0 VIN=12V VIN=9V 2.0 1.0 0.0 0 1 2 3 Output Current Io[A] 4 5 6 No.6107–7/10 STK740-470 Eveluation Board The evaluation board is provided to evaluate this hybrid IC ♦ Equivalent Circuit 12 11 10 9 8 7 6 5 4 3 2 1 IC1 ON/OFF Vs R2 V IN L1 Vo C1 FB1 C2 GND GND ♦ Parts Table Part name C1 C2 R2 R3 R6 Requirements Number 1 2 1 1 1 BL02RN1-R62 HK-10S100-4500 1 1 Use a fuse resistor (20 to 30Ω) when needed Murata manufacturing co., ltd. Toho zinc co., ltd. 45µH, 5A Manufacturer Sanyo Electronic component co., ltd. Sanyo Electronic component co., ltd. Notes OS capacitor Low impedance (CG) Electrolytic capacitor 47µF/25V Electrolytic capacitor 1000µF/16V Resistor Jumper Jumper 100Ω FB1 Ferrite-bead core L1 Choke coil ♦ Notes on pattern designing 1 Place VCC pin (pin 6) and VIN pins (pin 11 and 12) lines separately and use an input capacitor (+) for connection. 2 Place GND pin (pin 5) and A pin (pins 7 and 8) lines separately. 3 Connect A pin (pins 7 and 8) with the input capacitor (–) through a Ferrite-bead core. 4 Connect GND pin (pin 5) with the input capacitor (–) or the output capacitor (–). However, connect with the output capacitor (–) unless otherwise specified. 5 Shorten the length of the line between the input capacitor (–) and the output capacitor (–) as well as possible. 6 Connect VS pin (pin 2) with the output capacitor (+). No.6107–8/10 STK740-470 ♦ Perspective Wiring Layout (from soldered side) R6 CN 3 C1a IC1 FB1 R5 R1R2 R3 S-GND ON/OFF C1b C4 C5 C6 +Vs VIN GND CN1 C1c C8 C2a C2b C9 CN 2 C2c L1 +Vo GND ♦ Circuit Pattern (soldered side) STK740-400 TEST-B No.6107–9/10 STK740-470 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 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 June, 1999. Specifications and information herein are subject to change without notice. PS No.6107–10/10