STR-W6200D Series - Power IC for PWM Type Switching Power Supply with Low Noise and Low Standby Power

Q: How does STR-W6200D achieve low standby power under light load?

It automatically switches from PWM operation during normal operation to burst-oscillation under light load to reduce standby power.

Q: What power-control features help reduce EMI noise in this series?

The series includes a PWM with jittering function that reduces EMI noise, enabling simplified low-cost EMI filter design.

Q: What protection functions are included in STR-W6200D?

It provides multiple protections including OCP (pulse-by-pulse), OLP (auto-restart with adjustable delay), OVP (latch shutdown), and thermal shutdown protection (latch shutdown), plus external latch protection.

Oct 12, 2026

Upload by Aditya

STR-W6200D series power ICs for PWM-type switching power supplies integrate a power MOSFET and a current-mode PWM controller. Low standby power is achieved by automatically switching between PWM operation at normal load and burst-oscillation under light load. The architecture targets high cost-performance designs using few external components, with features such as jittered PWM, adjustable EMI filter simplification, built-in protections (OCP/OLP/OVP/TSD/ELP), slope compensation, startup assistance, and leading-edge blanking.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

General Descriptions

Features

Applications

Product Lineup

Typical Application Circuit

Typical Electrical Characteristics

Warning

STR-W6200D Series Power IC for PWM Type Switching Power Supply with Low Noise and Low Standby Power ■ General Descriptions The STR-W6200D series products are power ICs for switching power supplies, incorporating a power MOSFET and a current-mode type PWM controller IC. The low standby power is accomplished by the automatic switching between the PWM operation in normal operation and the burst-oscillation under light load condition. The product achieves high cost-performance power supply systems with few external components. ■ Features TO-220F-6 􀀁 Current-Mode Type PWM Control 􀀁 PWM with Jittering Function The function reduces the EMI noise and enables simplified (low-cost) EMI filters. The jittering period is adjustable by an external capacitor. 􀀁 Auto-Standby Function The burst-oscillation enables the low standby power. Input Power PIN < 100mW at no load 􀀁 Built-in Startup Circuit, enabling low power consumption 􀀁 Overcurrent Protection (OCP) with Built-in Input Compensation Circuit The function has less AC input voltage dependency. 􀀁 Overload Protection (OLP) with Built-in Delay Timer ( the delay time is adjustable by an external capacitor) 􀀁 External Latch Protection (ELP) The function enables the latch shutdown by external signal. 􀀁 Bias-Assist Function, reducing operating VCC voltage drop The function improves the startup operation and makes a low VCC capacitor applicable. 􀀁 Leading Edge Blanking Function 􀀁 Slope Compensation Function 􀀁 Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET 􀀁 Various Protections Overcurrent Protection (OCP)----------------------------------Pulse-by-Pulse Overload Protection (OLP) -------------------------------------Auto-Restart Overvoltage Protection (OVP) ---------------------------------Latch Shutdown Thermal Shutdown Protection (TSD) -------------------------Latch Shutdown ■ Applications Switching Power Supplies for Home Appliances (White Goods), Digital Consumer Equipment, OA Equipment, Industry Machines, Communication Devices, Others ■ Product Lineup | Product No. | fOSC
(kHz) | MOSFET
VDSS (MIN) (V) | RDS(ON)(MAX)
(Ω) | | --- | --- | --- | --- | | STR-W6251D | 67 | 650 | 3.95 | | STR-W6252D | 67 | 650 | 2.8 | | STR-W6253D | 67 | 650 | 1.9 | ■ Typical Application Circuit STR-W6200D ■ Typical Electrical Characteristics STR-W6251D Power Supply Characteristics Input: 85-264VAC, POUT: 10W (5V/2A) Efficiency η-- Output Current IOUT Input Power PIN－ Output Power POUT Efficiency η(%) 100 90 80 70 60 50 40 30 20 10 0 | | | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 120VAC | | | | | | | | | | | | | 230VAC | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 0 0.5 1.0 1.5 2.0 2.5 Output Current IOUT (A) Input Power PIN (W) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.1 0.2 0.3 0.4 0.5 Output Power POUT (W) Warning 􀀁 The contents in this document are subject to changes, for improvement and other purposes, without notice. Make sure that this is the latest version of the document before use. 􀀁 The operation and circuit examples in this document are provided for reference purposes only. Sanken assumes no liability for violation of industrial property, intellectual property, or other rights of Sanken or third parties, that stem from these examples. 􀀁 The user must take responsibility for considering and determining which objects the products in this document are used with. 􀀁 Although Sanken will continue to improve the quality and reliability of its products, semiconductor products, by their nature, have certain fault and failure rates.

FAQs

How does STR-W6200D achieve low standby power under light load?

It automatically switches from PWM operation during normal operation to burst-oscillation under light load to reduce standby power.

What power-control features help reduce EMI noise in this series?

The series includes a PWM with jittering function that reduces EMI noise, enabling simplified low-cost EMI filter design.

What protection functions are included in STR-W6200D?

It provides multiple protections including OCP (pulse-by-pulse), OLP (auto-restart with adjustable delay), OVP (latch shutdown), and thermal shutdown protection (latch shutdown), plus external latch protection.

Oct 12, 2026

Upload by Aditya