DER-112(#1): 500mA @ 40V Max, 24V in, Boost

Summary

This document is an engineering report describing two constant current and constant voltage (CC/CV) power supplies utilizing DPA423G (at 20 W) and DPA424G (at 30 W).

The power supplies operate from an input of 24 VDC. The power supply is constant current regulated (to 500 mA) but operates as a voltage regulator at lower power.

This document provides complete design information including specification, schematic, bill of material and layout information.

Specifications

Manufacturer	Power Integrations
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board	Board not Stocked
Voltage In	24 V
Topology	Step Up
Current Out	500 mA
Voltage Out (Max)	40 V
Outputs and Type	1 Non-Isolated
Efficiency @ Conditions	>90%, 24V in, 3 ~ 23.5 W @ 40 V
Features	Current Limit (Adj. or Fixed) Open Circuit Protection Over Current Protection Over Voltage Protection Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	400 kHz
Component Count + Extras	19 + 4
Design Author	Power Integrations
Application / Target Market	LCD Backlighting
Main I.C. Base Part	DPA423
Date Created By Author	2006-07
Date Added To Library	2014-09