DC1595A: 1A @ 25V Max, 90 ~ 270V in, Isolated

Summary

Demonstration circuit 1595A is an off-line isolated flyback converter featuring LT3799. The demo board is designed to drive a 20V nominal LED string at 1A from an input voltage range of 90VAC to 270VAC. It is also designed to comply with IEC 61000-3-2 Class C harmonics standard and EN55015B conducted EMI standard.

The LT3799 controls an isolated flyback converter in boundary mode, suitable for LED applications requiring 4W to over 100W of LED power. Its novel current sensing scheme delivers a well regulated output current to the secondary side without using an opto-coupler. It’s unique bleeder circuit makes the LED driver compatible with TRIAC dimmers without additional components. Open and shorted-LED protection ensures long term reliability.

The LT3799 is available in a low profile, thermally enhanced 16-lead MSOP package.

The LT3799 datasheet gives a complete description of the part, operation and application information. The datasheet must be read in conjunction with this quick start guide for demo circuit 1595A.

Specifications

Manufacturer	Analog Devices Inc.
Category	Lighting
Sub-Category	LED Drivers - AC / Offline
Eval Board Part Number	DC1595A-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
AC Voltage	115 V 230 V Universal
Outputs and Type	1 Isolated
Current Out	1 A
Voltage Out (Max)	25 V
Efficiency @ Conditions	>94%, 90 ~ 270V in, 25V @ 1 A
Features	Current Limit (Adj. or Fixed) Fault Indication LDO Regulator(s), On-Chip Open Circuit Protection PFC Short Circuit Protection Voltage Reference
Switching Frequency	25 ~ 300 kHz
Component Count + Extras	42 + 4
Design Author	Linear Technology
Application / Target Market	Lighting: LED Commercial Lighting Lighting: LED Home Lighting
Voltage In	90 ~ 270 VAC
Power Factor	>0.9
Standard(s)	EN55015 B conducted EMI IEC 61000-3-2 Class C
Main I.C. Base Part	LT3799
Date Created By Author	2011-11
Date Added To Library	2015-10