45W/12V power supply based on STCH03 QR flyback controller and SRK1000B adaptive synchronous rectification controller

EVAL-STCH03-45W

Overview

The EVAL-STCH03-45W is a 45 W / 12 V isolated power supply developed for general purpose applications. The evaluation board implements a Quasi Resonant flyback converter based on the STCH03 controller with optocoupler feedback for voltage and primary side regulation for constant output current regulation.

The secondary side rectification is based on the SRK1000B adaptive synchronous rectification controller.
The efficiency of the application is very high over entire output power range thanks to the smart power management of the STCH03 and SRK1000B controllers, the STF10LN80K5 MDmesh K5 primary MOSFET and the STL90N10F7 Power MOSFET for the synchronous rectification.
The evaluation board implements a robust output supply protected against output overvoltage, output undervoltage, output overpower and output short-circuit. The protections are auto-restart for a safe operation.

Main features

Input voltage range V_IN: 90 V_AC to 265 V_AC
Output range: 12 V - 3.75 A continuous operation
Very low stand-by power:
Average full load efficiency:
- > 88% @ 115 V_IN
- > 89% @ 230 V_IN
Active mode at 10% load efficiency:
- > 84% @ 115 V_IN
- > 82% @ 230 V_IN
Active mode at 10% load efficiency: > 84% @ 115 V_IN > 82% @ 230 V_IN
Safety: Acc. to EN60065
EMI: Acc. to EN55022 - Class B
Small PCB form factor: 85 x 55 X 25 mm

Design Files

45W / 12V power supply based on STCH03 QR flyback controller and SRK1000B adaptive synchronous rectification controller

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-05-09 16:19:54

[Erha Image Recognition Artificial Intelligence Vision Sensor] 4. Color recognition and object recognition
Erha sensor's color recognition is still very accurate and fast. We will perform multiple color recognition this time. First, we need to set it to "learn multiple", which is the same as the setting fo
【PSoC4】Light up RGB LED (non-program control)
[font=宋体]Magical? ! Before writing a single statement, the RGB LED has magically lit up... 3-color LED, combining 8 colors to display in sequence. [/font] [font=宋体]Is this PSoC? ! [/font] [font=宋体]Jus
Please recommend a PCI-E interface chip
Please recommend a PCI-E interface chip, similar to PCI9054, for urgent use, thank you! ! Bye! !
1. [Learning LPC1768 library functions] LED experiment
void LED_Config(void){// The first step is to turn on the GPIO peripheral clock power. Only when it is turned on can the related GPIO registers be operated .Chip_GPIO_Init(LPC_GPIO); //Peripheral cloc
The difference between variable frequency power supply and inverter
Frequency converter: The output waveform is a simulated sine wave, which is mainly used for speed regulation of three-phase asynchronous motors, also called variable frequency speed regulator. Variabl
【UFUN Learning】UFUN Getting Started with Pictures
[font=新宋体][size=4] I received the legendary [UFUN] today, a very mysterious board, the PCIE interface alone is different [/size][/font][font=新宋体][size=4]:pleased: Let me post the photo above!! I opene

Datasheet More

Circuits More