DER-384: 135mA @ 88V max, 190 ~ 265VAC in

Summary

This document describes a cost effective power supply utilizing the LYTSwitchTM-0 family (LYT0006D) in a highly compact buck topology.

This power supply operates over an input voltage range of 190 VAC to 265 VAC. The DC bus voltage is high enough to support 85 V output when using a buck topology. In a buck converter the output voltage must always be lower than the input voltage. The output voltage is also limited by the maximum duty cycle of the LYTSwitch-0, which also requires the input voltage to be larger than the output voltage.

The reference design is not limited for LED tube of ballast lamp application; due to its simplicity the design layout can be easily modified for retrofit lamp applications.

Specifications

Manufacturer Power Integrations
Category Lighting
Sub-Category LED Drivers - AC / Offline
Eval Board ABC
AC Voltage 230 V
Outputs and Type 1 Non-Isolated
Current Out 135 mA
Voltage Out (Max) 88 V
Efficiency @ Conditions >90%, 190 ~ 254 VACin, 88 Vout
>90%, 190 ~ 240 VACin, 85 Vout
>90%, 190 ~ 223 VACin, 82 Vout
Features Current Limit (Adj. or Fixed)
Frequency Jitter for EMI
Open Circuit Protection
Short Circuit Protection
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 66 kHz
Component Count + Extras 24 + 5
Design Author Power Integrations
Application / Target Market LED Commercial Lighting
LED Home Lighting
Main I.C. Base Part LYT0006
Voltage In 190 ~ 265 VAC
Power Factor
Standard(s)
Date Created By Author 2013-10
Date Added To Library 2014-07