TN8D51A Ordering number : ENA0985 SANYO Semiconductors DATA SHEET ExPD (Excellent-Performance Power & RF Device) TN8D51A Separately-Excited Step-Down Switching Regulator (12V Output type) Features • • • • • • High efficiency (ON resistance 80mΩ, Vertical-type P-ch Power MOSFET). Over current protection (Self recovery type). Under voltage protection. Over temperature protection function (Self recovery type). Soft start function (Variable subject to externally-connected capacitor). Stand-by mode function (Compatible with soft start terminal). Specifications Absolute Maximum Ratings at Ta=25°C Parameter Symbol Conditions Ratings Unit Maximum Input Voltage VIN max 57 Maximum Output Current IO max 8 A Drain-to-Source Voltage of built-in MOSFET VDSS --60 V Drain Current of built-in MOSFET (DC) FB Pin Maximum Input Voltage ID IDP Vfb SS Pin Maximum Input Voltage VSS Drain Current of built-in MOSFET (Pulse) Allowable Power Dissipation PD Operating Temperature Topr Junction Temperature Tj Storage Temperature Tstg PW≤10μs, duty cycle≤1% Tc=25°C V --12 A --48 A 15 V 7 V 2.0 W 20 W --25 to +125 °C 150 °C --55 to +150 °C Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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. www.semiconductor-sanyo.com/network 90308IQ TI IM TC-00001590 No. A0985-1/11 TN8D51A Recommend Operating Conditions Parameter Symbol Input Voltage Output Current Operating Temperature Range Conditions Ratings Unit VIN Ta=25°C 20 to 48 V IOUT Topr rec Ta=25°C 0 to 8 A --10 to +85 °C Electrical Characteristics at Ta=25°C, See Specified Test Circuit Parameter Symbol Output Voltage Conditions VOUT Efficiency η Drain-to-Source Breakdown Voltage V(BR)DSS of built-in MOSFET Drain-to-Source On Resistance RDS(on) of built-in MOSFET Switching Frequency Freq 11.7 ID=--1mA, VIN,GND,Vfb,VSS=0V --60 VIN=30V, IOUT=3A VIN=30V, Vfb=0V Line Regulation ΔVline VIN=20 to 40V, IOUT=3A ΔVload VIN=30V, IOUT=0.8 to 8A ΔVO / ΔTa Over-Current-Protection-Operation Iocp -Threshold Voltage Under-Voltage-Protection-Operation -Release Voltage Under-Voltage-Protection Hysteresis Voltage Over-Temperature-Protection-Operation -Threshold-Current *1 Over-Temperature-Protection-Operation -Release Temperature *1 Over-Temperature-Protection -Hysteresis Temperature *1 SS Terminal Current V % V mΩ 120 150 180 88 92 96 kHz % 130 200 mV 70 100 mV mV / °C ±1.2 12 16 A Vuvlo on 7.2 8.0 8.8 V Vuvlo off 8.1 9.0 9.9 V Vuvlo hys 1.0 V Ttsd on 165 °C Ttsd off 140 °C Ttsd hys 25 °C 10 μA ISS Vstb on Standby Operating Voltage 12.4 8.1 -Threshold Current Under-Voltage-Protection-Operation 12.0 80 VIN=30V, IOUT=3A, Ta= --25 to +125°C VIN=30V Unit max 92 ISW=5A Duty max Output Voltage Temperature Coefficient *1 typ VIN=30V, IOUT=3A VIN=30V, IOUT=3A Maximum Duty Load Regulation Ratings min Standby Current Istb VIN=30V VIN=30V VIN=30V, VSS=0V 0.3 V 500 μA Note: the values with "*1" are our targeted values, but not guaranteed. Package Dimensions unit : mm (typ) 7527-001 10.0 4.5 3.2 1.6 16.0 7.2 3.5 2.8 1 2 3 4 (5.9) 0.9 0.5 12.5 14.0 2.4 5 1.27 0.7 3.81 2.54 1.27 2.54 2.75 1 : VIN 2 : GND 3 : SWOUT 4 : FB 5 : SS SANYO : TO-220FI5H-HB No. A0985-2/11 TN8D51A Block Diagram VIN 1 3 SWOUT Under Voltage Protect Over Temperature Protect Over Current Protect SENSE Pch MOSFET OUTPUT -COMP + OSC SS 5 SOFTSTART Band Gap + -- AMP 4 FB GND 2 Pin Functions Pin No. Symbol 1 VIN Power Supply Input (Maximum 57V) Function 2 GND GND 3 4 SWOUT FB 5 SS Pulse Voltage Output Feedback from Output Voltage For Soft Start Capacitor Connection and Standby Mode Switching Application Circuit Example 1 VIN SWOUT 3 VOUT VIN 5 SS + FB 4 + 2 GND GND GND No. A0985-3/11 TN8D51A Forward Bias A S O IDP= --48A Drain Current, ID -- A 3 2 <10μs 10 μs 10 0μ s ID= --12A 1m --10 7 5 3 2 DC 10 3 2 ms 0m s op era Operation in this area is limited by RDS(on). --1.0 7 5 s 10 tio n Tc=25°C Single pulse --0.1 --0.1 2 3 2.0 No 1.5 he at sin k 1.0 0.5 0 5 7 --1.0 2 3 5 7 --10 2 3 5 7 --100 IT13084 Drain-to-Source Voltage, VDS -- V 0 20 40 60 80 100 120 Ambient Temperature, Ta -- °C 140 160 IT12620 PD -- Tc 25 Allowable Power Dissipation, PD -- W PD -- Ta 2.5 Allowable Power Dissipation, PD -- W --100 7 5 20 15 10 5 0 0 20 40 60 80 100 120 140 Case Temperature, Tc -- °C 160 IT12671 Specified Circuit for Electrical Characteristics [Circuit] L1 IC1 VIN VOUT R3 1 2 3 4 5 + C1 + C3 GND D1 C2 C6 GND IT12637 [Components] Symbol Component Specification C1 Electrolytic Capacitor 3000 to 3600μF C2 Electrolytic Capacitor 2000 to 2200μF C3 Capacitor 0.1μF C6 Ceramic Capacitor 1000pF R3 Metal Oxide Film Resistor 47Ω / 2W L1 Choke Coil 100μH D1 Schottky Barrier Diode SBT250-06J * When measuring ripple noise voltage, put 47μF (electrolytic capacitor) and 0.1μF (ceramic or film capacitor) into measuring point. No. A0985-4/11 TN8D51A Evaluation Board [Circuit] L1 F1 VIN IC1 FUSE R3 C4 R1 VOUT 1 2 3 4 5 + C1A + C1B + C1C + C2A C3 D1 C6 C5 R2 GND GND IT12638 [Components] Symbol F1 Component Specification Maker Remark Fuse 4A Littelfuse 452 004 C1A Electrolytic Capacitor 1200μF / 80V Nippon Chemi-Con Corp. KZE C1B Electrolytic Capacitor 1200μF / 80V Nippon Chemi-Con Corp. KZE C1C Electrolytic Capacitor 1200μF / 80V Nippon Chemi-Con Corp. KZE C2A Electrolytic Capacitor 2200μF / 35V SANYO Electronic Co., Ltd. MV C3 Film Capacitor 0.1μF / 100V Matsushita Electronic Components Corp. ECQ-B C4 N.C. 1000pF Murata Manufacturing Co., Ltd. C5 N.C. C6 Ceramic Capacitor R1 Jumper Line R2 N.C. R3 Metal Oxide Film Resistor 47Ω / 2W Matsushita Electronic Components Corp. L1 Choke Coil HK-12S120-1010 TOHO ZINC CO.,LTD. D1 Schottky Barrier Diode SBT250-06J SANYO Semiconductor Co., Ltd. 100μH No. A0985-5/11 TN8D51A Recommended PCB Pattern TO-220FI5H-HB Specification Silk Printing (Top View) TO-220FI5H-HB Specification Pattern (Perspective View) No. A0985-6/11 TN8D51A Output Voltage -- Output Current 12.4 Efficiency -- Output Current 100 VIN=20V 40V 90 12.2 12.1 Efficiency -- % Output Voltage -- V 12.3 VIN=40V 12.0 30V 11.9 20V 30V 80 70 11.8 60 11.7 0 2 4 6 Output Current -- A 14 0 8 4 6 8 Output Current -- A Characteristic of Output Current Protection IT13261 Output Voltage -- Input Voltage 12.4 VIN=40V 12 2 IT13260 12.3 10 Output Voltage -- V Output Voltage -- V 20V 8 6 4 12.1 =3A I OUT 8A 12.0 11.9 11.8 2 0 0 2 4 6 8 10 12 14 Output Current -- A 11.7 16 0 10 20 30 40 60 IT13262 Power Loss -- Input Voltage 16 14 6 12 Power Loss -- W 5 IO U 4 T= 8A 3 2 =8A I OUT 10 8 6 4 3A 3A 1 2 0 0 0 10 20 30 40 50 Input Voltage -- V 60 0 10 20 30 40 180 VIN=30V Oscillation Frequency -- kHz 12.3 12.1 IOUT =3A 12.0 11.9 170 160 3A I OUT= 150 140 130 11.8 11.7 --25 60 IT13264 Oscillation Frequency -- Tc VIN=30V 12.2 50 Input Voltage -- V IT13263 Output Voltage -- Tc 12.4 Output Voltage -- V 50 Input Voltage -- V IT13319 Input Current -- Input Voltage 7 Input Current -- A 12.2 0 25 50 Case Temperature, Tc -- °C 75 100 IT13265 120 --25 0 25 50 Case Temperature, Tc -- °C 75 100 IT13266 No. A0985-7/11 TN8D51A Input Reduced-Voltage Characteristic 14 Output Voltage -- V 13 IOUT=3A 12 8A 11 10 9 0 5 10 15 20 25 Input Voltage -- V 30 IT13267 Output Voltage Rising Characteristic IOUT=3A Output Voltage Falling Characteristic Input voltage: VIN=30V IOUT=3A Input voltage: VIN=30V 5V / div 20ms Output voltage: VOUT=12V ON Input / Output Voltage -- V Input / Output Voltage -- V 5V / div 20ms Output voltage: VOUT=12V IT12697 IT12698 Output Voltage Rising Characteristic IOUT=8A Output voltage: VOUT=12V ON 2V / div Input / Output Voltage -- V 5V / div 20ms Capacitance of Soft Start Capacitor -Output Voltage Rising Characteristic IT12699 20ms Output voltage: VOUT=12V Capacitance of Soft Start Capacitor -Output Voltage Rising Characteristic 2V / div Output voltage: VOUT=12V IT12700 Output voltage: VOUT=12V 10ms Output Voltage -- V 10ms Output Voltage -- V IOUT=8A Input voltage: VIN=30V Input voltage: VIN=30V 5V / div Input / Output Voltage -- V Output Voltage Falling Characteristic C=0.01μF C=0.1μF C=0.22μF ON C=0.01μF C=0.1μF C=0.22μF ON VIN=30V IOUT=3A VIN=30V IOUT=8A IT12701 IT12702 No. A0985-8/11 TN8D51A Example of Over-voltage Protection Circuit. Generally, in constant-voltage power supply circuit, output voltage will become higher than the specified value (overvoltage state) in case of any failures or PC board solderability defects. To minimize the damage caused by this over voltage, we recommend setting an over-voltage protection circuit. In designing, the following confirmations are necessary in actual circuit. 1) How the over-voltage protection circuit operates and its effects. 2) Is there any malfunction due to ambient temperature change of each device or exogenous noises? Over-voltage Protection Circuit Example F1 VIN Constant-voltage power supply FUSE VOUT ZD THYRISTOR C R GND GND IT12639 Example of Over-voltage Protection Circuit The thyristor will operate when it accept an over-voltage (VOUT) signal, then the fuse is melted and the input power is cut off, then the operation of IC1 is stopped. F1 VIN IC1 FUSE VOUT THYRISTOR 1 2 3 4 5 + + C GND ZD R GND IT12640 Continued on next page. No. A0985-9/11 TN8D51A Continued from preceding page. SS terminal (5 pin) also acts as standby mode switch. By setting SS terminal (5 pin) voltage to be equal or less than 0.3Vtyp, the output ON/OFF is able to be controlled by external signals. ON/OFF Control Circuit Example F1 VIN IC1 FUSE VOUT 1 2 3 4 5 + + NPN GND Signal GND IT12641 In addition, confirmation of the following points is necessary in actual circuit. 1) How the output ON/OFF control operates and its effects. 2) Is there any malfunction due to the ambient temperature change of each device or exogenous noises? Points to Remember in Pattern Designing 1) Transient large current flows to VIN terminal (1 pin), so we recommend the input capacitor should be 3000μF and above. In addition, (+) (-) terminals of the input capacitor should be set near to VIN terminal (1 pin) and GND terminal (2 pin). 2) Large current flows to C1A to C, VIN terminal (1 pin) of IC1, SWOUT terminal (3 pin), D1, L1, and C2A. So, the wiring should be thick and short. 3) FB terminal (4 pin) of IC1 is the feedback terminal from output voltage. It should be near to the output capacitor C2A. • For the purpose of ensuring the stability of oscillation, a capacitor should be inserted between SS terminal (5 pin) and GND terminal (2 pin). • The absolute maximum rated voltage of SS terminal (5 pin) is 7V. The absolute maximum rated voltage of FB terminal (4 pin) is within the range of 5 to 30V according to the output voltage type. When a voltage equal or higher than the rated value is applied to SS terminal (5 pin) or FB terminal (4 pin) in some cases such as abnormal test, protection measures like inserting fuses should be taken. • The built-in over-heat protection is a function to prevent the circuit from overheat state caused by transient temperature rise, but not a function to prevent from abnormal caused by a sudden heat generation. In addition, the reliability of over-heat protection function is not guarantee. No. A0985-10/11 TN8D51A SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality 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 accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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 Semiconductor Co.,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 information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor 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 Semiconductor Co.,Ltd. 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. 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 for any claim or suits with regard to a third party's intellectual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of September, 2008. Specifications and information herein are subject to change without notice. PS No. A0985-11/11