Switching Regulators. STR-W6753 Universal-Input/58 W Off-Line Quasi- Resonant Flyback Switching Regulator

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3 Resonant Flyback Regulator ELECTRICAL CHARACTERISTICS at T A = +25 C, V CC = 20 V, voltage measurements are referenced to S/GND terminal (unless otherwise specified). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Start-Up Operation Operation Start Voltage V CC(ON) Turn-on, V CC = V V Soft-Start Operation Stop Voltage V SS/OLP V Soft-Start Oper. Charging Current I SS/OLP µa Operation Stop Voltage V CC(OFF) Turn-off, V CC = V V Circuit Current in Non-Operation I CC(OFF) V CC = 15 V 100 µa Normal Operation Drain-Source Breakdown Voltage V (BR)DSS I D = 300 µa 650 V Drain Leakage Current I DSS V DS = 650 V 300 µa On-State Resistance r DS(on) I D = 1.4 A, T J = +25 C 1.7 Ω Time t f 400 ns Circuit Current I CC(ON) 6.0 ma Oscillation Frequency f osc khz Bottom-Skip Oper. Threshold Volt. V OCPBD(BS1) mv V OCPBD(BS2) mv Quasi-Resonant Oper. Threshold V OCPBD(TH1) mv V OCPBD(TH2) mv Feedback-Pin Threshold Voltage V FB(OFF) V Feedback-Pin Current I FB(ON) µa Standby Operation Standby Operation Start Voltage V CC(S) V CC = V V Standby Oper. Start Volt. Interval V CC V Standby Non-Operation Current I CC(S) V CC = 10.2 V µa Feedback-Pin Current I FB(ON) V CC = 10.2 V µa Feedback-Pin Threshold Voltage V FB(S) V CC = 12.2 V V Minimum ON Time t on(min) µs continued next page

4 Resonant Flyback Regulator ELECTRICAL CHARACTERISTICS at T A = +25 C, V CC = 20 V, voltage measurements are referenced to S/GND terminal (unless otherwise specified). Protection Operation OVP Operation Voltage V CC(OVP) Turn-off, V CC = V V Maximum ON Time t on(max) µs OLP Operation Voltage V SSOLP V OLP Operation Current I SSOLP µa Overcurrent Detect. Threshold Volt. V OCPBD(LIM) V OCP/BD-Pin Current I OCPBD µa Latch Holding Current I CC(H) V CC = 29.9 V CC(OFF) 0.3 V ma Latch Release Voltage V CC(L) V CC = V V Other Thermal Resistance R θjf Output junction-to-frame 2.0 C/W NOTES: 1. Typical Data is for design information only. 2. Negative current is defined as coming out of (sourcing) the specified device termninal. Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Northeast Cutoff, Box Worcester, Massachusetts

5 Resonant Flyback Regulator MOSFET TYPICAL CHARACTERISTICS Avalanche energy is measured at V DD = 99 V, L = 20 mh, I L = 3.6 A. 5

6 Resonant Flyback Regulator MOSFET TYPICAL CHARACTERISTICS (cont d) WARNING These devices are designed to be operated at lethal voltages and energy levels. Circuit designs that embody these components must conform with applicable safety requirements. Precautions must be taken to prevent accidental contact with power-line potentials. Do not connect grounded test equipment. The use of an isolation transformer is recommended during circuit development and breadboarding Northeast Cutoff, Box Worcester, Massachusetts

7 Resonant Flyback Regulator APPLICATIONS INFORMATION Typical Application Complete product description and applications information is provided in Application Note , Series STR- W6750 Off-Line Quasi-Resonant Flyback. The products described herein are manufactured in Japan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc. Sanken and Allegro reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Therefore, the user is cautioned to verify that the information in this publication is current before placing any order. When using the products described herein, the applicability and suitability of such products for the intended purpose shall be reviewed at the users responsibility. Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the equipment or systems against any possible injury, death, fires or damages to society due to device failure or malfunction. Sanken products listed in this publication are designed and intended for use as components in general-purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Their use in any application requiring radiation hardness assurance (e.g., aerospace equipment) is not supported. When considering the use of Sanken products in applications where higher reliability is required (transportation equipment and its control systems or equipment, fire- or burglar-alarm systems, various safety devices, etc.), contact a company sales representative to discuss and obtain written confirmation of your specifications. The use of Sanken products without the written consent of Sanken in applications where extremely high reliability is required (aerospace equipment, nuclear power-control stations, life-support systems, etc.) is strictly prohibited. The information included herein is believed to be accurate and reliable. Application and operation examples described in this publication are given for reference only and Sanken and Allegro assume no responsibility for any infringement of industrial property rights, intellectual property rights, or any other rights of Sanken or Allegro or any third party that may result from its use. EI16EI 7

8 Resonant Flyback Regulator PACKAGE DIMENSIONS in Millimeters Product weight: approx. 2.3 g. Recommended mounting hardware torque: ~ Nm, 6 ~ 8 kgf cm. Recommended silicon grease: Dow Corning SC102, Toshiba YG6260, Shin-Etsu G746, or equivalent Northeast Cutoff, Box Worcester, Massachusetts