Analog Devices LT3799-1 franjic rev | Demoboard DC1816A

Description

Demonstration circuit 1816A is an off-line isolated flyback LED driver featuring LT®3799-1. The demo board provides a single constant current output of 3A over an LED string voltage from 22V to 38V. It is optimized to operate over a wide AC input voltage range (90VAC to 305VAC, 47Hzto 63Hz). LED current typically stays within ±5% over the whole input voltage range. It provides a high power factor (>0.9) enabling a single design to be used worldwide. It is also designed to comply with the IEC 61000-3-2 ClassC harmonics standard and the EN55015B conducted EMI standard.

The LT3799-1 controls an isolated flyback converter in boundary mode. Its novel current sensing scheme delivers a well-regulated output current to the secondary side without using an opto-coupler. Open- and shorted-LEDprotection ensures long term reliability.

The LT3799-1 is available in a low profile, thermallyenhanced 16-lead MSOP package.

The LT3799-1 data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 1816A.

Features

Remarks:L1=10mH L2=10mH L3=150uHAnd Transformer T1 UsedRefer page no.7

More information

• Datasheet
• IC product information