Year: 2026

DM0565R PDF – Green Mode Power Switch ( FSDM0565R )

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This is an integrated Green Mode Power Switch that combines a fixed-frequency current-mode PWM controller and a high-voltage avalanche-rugged SenseFET into a single package.

Part Number: DM0565R, DMO565R

unction: Green Mode Fairchild Power Switch

Package: TO-220F-6L Type

Manufacturer: Fairchild Semiconductor

Images:

DM0565R datasheet

Description

The DM0565R is an integrated Pulse Width Modulator (PWM) and Sense FET specifically designed for high performance offline Switch Mode Power Supplies (SMPS) with minimal external components. This device is an integrated high voltage power switching regulator which combine an avalanche rugged Sense FET with a current mode PWM control block. The PWM controller includes integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft start, temperature compensated precise current sources for a loop compensation and self protection circuitry.

DM0565R switch

A “Green Mode Power Switch” is a type of power switch that incorporates energy-saving features and is designed to achieve high levels of energy efficiency. These switches are commonly used in power supply applications to help reduce power consumption and meet energy efficiency standards.

Green Mode Operation

  • Automatic Burst Mode under light-load conditions
  • Reduces switching losses during standby
  • Standby power consumption below 1 W
  • Designed to satisfy energy-efficiency regulations for offline power supplies
  • Improves overall SMPS efficiency without additional external circuitry

Features

  • Integrated high-voltage SenseFET and PWM controller
  • Green Mode operation for low standby power consumption
  • Built-in avalanche rugged SenseFET
  • Fixed operating frequency: 66 kHz
  • Current-mode PWM control
  • Internal startup circuit
  • Built-in soft-start function
  • Pulse-by-pulse current limiting
  • Abnormal Over Current Protection (AOCP)
  • Over Voltage Protection (OVP)
  • Over Load Protection (OLP)
  • Under Voltage Lockout (UVLO) with hysteresis
  • Thermal Shutdown Protection (TSD)
  • Auto-restart mode after fault conditions
  • Optimized gate driver
  • Leading Edge Blanking (LEB)
  • Internal compensation current sources
  • Low operating current

Pinout

DM0565R pinout

Integrated Functional Blocks

  • High-voltage avalanche rugged SenseFET
  • 66 kHz oscillator
  • Current-mode PWM controller
  • Gate driver
  • Internal startup circuit
  • Soft-start circuit
  • Leading Edge Blanking (LEB)
  • Pulse current limiter
  • Loop compensation current source
  • Burst Mode controller
  • Protection logic

Typical Applications

  • LCD monitor power supplies
  • Set-top box (STB) power supplies
  • AC-DC adapters
  • Battery chargers
  • Offline flyback converters
  • Consumer electronics power supplies
  • Industrial auxiliary power supplies
  • Standby power converters

Alternative / Equivalent Products

  • FSDM0565R
  • FSDM0465R
  • KA5M0565R
  • ICE2A0565
  • TNY277 Series
  • NCP1207 with external MOSFET

Other data sheets are available within the file: FSDM0565R, FSDM07652R

DM0565R PDF Datasheet

B737 Datasheet – 40V, 300mA, PNP Transistor – Rohm

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Part Number: B737, 2SB737

Funtion: -40V, -300mA, Low rbb Low Noise Amp

Package: TO-92 Type

Manufacturer: Rohm

Image

B737 datasheet

Description

B737 is a low-noise PNP bipolar junction transistor from Rohm, housed in a TO-92 package and rated for up to -40V and -300mA operation. It features ultra-low noise characteristics, low base resistance, and excellent noise response, making it suitable for sensitive analog signal applications. This transistor is commonly used in low-noise amplifiers, audio circuits, and precision signal processing stages.

Features

  • PNP bipolar transistor with -40V voltage rating
  • Low noise performance optimized for audio and signal applications
  • Ultra-low base resistance (rbb’ ≈ 2Ω)
  • Excellent noise response at low source resistance (Rg)
  • Low voltage noise characteristics
  • Complementary pair with 2SD786 (NPN)
  • TO-92 through-hole package

Absolute Maximum Ratings (Tc = 25 °C)

Parameter Symbol Value Unit
Collector-Base Voltage VCBO -50 V
Collector-Emitter Voltage VCEO -40 V
Emitter-Base Voltage VEBO -5 V
Collector Current IC -300 mA
Collector Power Dissipation PC 0.25 W
Junction Temperature Tj 125 °C

Design Notes

  • Ideal for low-noise amplifier stages where base resistance and noise figure are critical
  • Maintain low source impedance to fully benefit from low-noise characteristics
  • Ensure proper biasing to operate in the linear region for analog applications
  • Thermal limits should be considered due to relatively low power dissipation rating
  • Pair with 2SD786 for complementary push-pull amplifier designs

Typical Circuit Usage

  • Low-noise audio preamplifiers
  • Small-signal amplification stages
  • Differential amplifier input stages
  • Sensor signal conditioning circuits

How to Choose This Part

  • Select for applications requiring low noise and stable gain characteristics
  • Suitable for low-current analog signal amplification
  • Choose when complementary pairing with NPN transistor is needed
  • Verify voltage and current ratings match application requirements

Applications

  • Audio amplification systems
  • Precision analog circuits
  • Measurement and instrumentation equipment
  • Low-noise signal processing systems

Alternative / Equivalent Products

  • 2SA1015
  • BC560
  • 2SA970
  • 2SD786 (complementary NPN)

B737 Datasheet