ST8113 18W flyback controller with 600V MOSFET

ST8113 18W Flyback Controller

ST8113

The ST8113 is a high-performance current-mode PWM controller with an integrated 600V/4A power MOSFET, delivering up to 18W (24W peak) across a wide 85V-265V AC input range at a typical 70kHz switching frequency. An ultra-low 10µA startup current and automatic green-mode at light loads keep standby power below 100mW at 220V input, while sub-20kHz operation is minimized for audio-noise-free performance and frequency shuffling simplifies EMI design. Comprehensive OCP/OLP/UVLO/OVP/OTP protection ensures reliable system operation. Housed in a DIP7 package, it suits adapters, set-top boxes, open-frame and auxiliary power supplies.

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Specifications

PowerMax. 18W; Peak 24W (85~265V wide range)
Standby Power Consumption<100mW (at 220V input)
Control ModeHigh-Performance Current-Mode PWM
Frequency65/70/75kHz (typ. 70kHz)
Power Device CharacteristicsIntegrated 600V/4A power MOSFET; BVdss=600V; Ron≤3.3Ω; ID=4A
CharacteristicsUltra-low startup current (10µA), audio-noise-free operation, green-mode at light load, frequency shuffling for EMI, over-power compensation, leading-edge blanking, slope compensation, OCP/OLP/UVLO/OVP/OTP protection
PackageDIP7

Product details

Overview

The ST8113 is a high-performance current-mode PWM controller with an integrated 600V/4A power MOSFET. It delivers up to 18W output power across a wide input voltage range of 85V to 265V, with a peak output capability of up to 24W. The ST8113 features an ultra-low startup current of 10µA and automatically enters green mode under light-load conditions, achieving standby power consumption of less than 100mW at 220V input. The device minimizes operation in the sub-20kHz audio frequency range to ensure no audible noise, while the integrated frequency shuffling function effectively simplifies EMI design. Comprehensive protection functions including OCP, OLP, UVLO, OVP and OTP ensure reliable system operation.

Features

  • Ultra-low startup current (10µA)
  • Noise reduction function
  • Green-mode entry at light load
  • Frequency shuffling (jitter) function
  • Over-power compensation
  • Leading-edge blanking (LEB)
  • Slope compensation
  • Comprehensive protection: OCP, OLP, UVLO, OVP, OTP

Typical Applications

  • Adapters
  • Set-top boxes (STB)
  • Open-frame power supplies
  • Auxiliary power supplies

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