RDK-736: 5V @ 500mA and 12V @ 200mA, 85 ~ 440 VAC in

Summary

The RDK-736 evaluation board describes a non-isolated flyback converter designed to provide dual output of 5 V at 200 mA and 12 V at 500 mA from a wide input voltage range of 85 VAC to 440 VAC. This adapter utilizes the LNK3696P from the LinkSwitch-XT2 900 V family of devices.

The LinkSwitch-XT2 900 V family of devices integrates a high-voltage power MOSFET with an internal oscillator and ON/OFF controller inside a single monolithic IC. Unlike conventional pulse width modulation (PWM) controllers, LinkSwitchXT2 900 V devices utilize a simple ON/OFF control scheme combined with an internal current limit circuitry to regulate the output voltage. The LNK3696P IC was used in a non-isolated flyback with dual output (12 V and 5 V) delivering 500 mA and 200 mA respectively.

Output voltage regulation: 12 V ±10%, 5 V ±5%
<120 mW no-load input power at 230 VAC
>6 dB conducted EMI margin
No optocoupler or Zener diode required for regulation
Can withstand up to 450 VAC line input

Specifications

Manufacturer	Power Integrations
Category	AC/DC and DC/DC Conversion
Sub-Category	AC/DC SMPS - Multi Output
Eval Board Part Number	596-RDK-736-ND
Eval Board Supplier	Power Integrations
Eval Board	Normally In Stock
AC Voltage	Universal (115 / 230V)
Outputs and Type	2 Non-Isolated
Voltage Out: Highest Current First	5V, 12V
Current Out	500mA, 200mA
Output Power	7 W
Efficiency @ Conditions	>82%, 115 ~ 340 VAC, @ 100% load
No-load Input Power @ Voltage	<120 mW @ 230 V
Features	Current Limit (Adj. or Fixed) Over Voltage Protection Thermal Protection
Switching Frequency	66 kHz
Internal Switch	Yes
Component Count + Extras	38 + 6
Voltage In	85 ~ 440 VAC
Application / Target Market	Distributed Power Systems Power: AC Adapters
Design Author	Power Integrations
Main I.C. Base Part	LNK3696
Date Created By Author	2020-06
Date Added To Library	2020-12