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iW3623

iWatt
Part Number iW3623
Manufacturer iWatt
Description AC/DC Digital Power Controller
Published Jun 25, 2014
Detailed Description iW3623 AC/DC Digital Power Controller for High Power Factor Off-Line LED Drivers 1.0 Features ●● Isolated AC/DC off-line...
Datasheet PDF File iW3623 PDF File

iW3623
iW3623

Overview
iW3623 AC/DC Digital Power Controller for High Power Factor Off-Line LED Drivers 1.
0 Features ●● Isolated AC/DC off-line LED driver ●● Power factor > 0.
95 for wide input voltage range 100 – 277VAC ●● Total harmonic distortion (THD) < 10% ●● Under 5% 100Hz/120Hz output current ripple ●● Resonant control to achieve high efficiency ●● LED current foldback with external NTC ●● Small size design xx Small size input bulk capacitor xx Small size output capacitor xx Small transformer ●● Primary-side sensing eliminates the need for opto-isolator feedback and simplifies design ●● Tight LED current regulation ± 5% ●● Under 0.
5 second start-up time ●● Hot-plug LED module support ●● Multiple protection features: xx LED open circuit protection xx Single-fault protection xx Over-current protection xx LED short-circuit protection xx Current sense-resistor-short-circuit protection xx Input over-voltage and brown-out protection 2.
0 Description The iW3623 is a high-performance AC/DC off-line power supply controller for LED luminaires.
The iW3623 combines power factor correction and LED current regulation into one controller.
It achieves PF > 0.
95 and THD < 10% for 100– 277VAC input voltage range.
The iW3623 operates in quasi-resonant mode to provide high efficiency.
The device uses iWatt’s advanced primaryside sensing technology to achieve excellent line and load regulation without secondary-feedback circuit.
In addition, the iW3623’s pulse-by-pulse waveform analysis technology allows accurate LED current regulation.
The iW3623 maintains stability over all operating conditions without the need for loop compensation components.
3.
0 Applications ●● Non-dimmable LED lamps and luminaires ●● Optimized for up to 40W output power Rev.
0.
8 iW3623 Preliminary September 10, 2012 Page 1 iW3623 AC/DC Digital Power Controller for High Power Factor Off-Line LED Drivers Booster Converter AC Input Flyback Converter VOUT 4 BDRV 1 BVSENSE 14 VCB 6 ASU 7 VCC FDRV 10 RTN 3 BISENSE 2 ...


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