L8565_15 Datasheet, PDF (1/13 Pages) Unisonic Technologies – HIGH PERFORMANCE POWER FACTOR CORRECTION

UNISONIC TECHNOLOGIES CO., LTD
L8565
Preliminary
LINEAR INTEGRATED CIRCUIT
HIGH PERFORMANCE POWER
FACTOR CORRECTION
CONTROLLER IN CONTINUOUS
CONDUCTION MODE
 DESCRIPTION
The UTC L8565 is a wide input range controller integrated circuit for
active power factor correction. The circuit is designed for boost PFC
application, and requires reduced external component count. Its power
supply is recommended to be provided by an external auxiliary supply
which will switch on and off the IC.
The circuit operates in the continuous conduction mode under average
current, and in discontinuous conduction mode only in light load
condition. The switching frequency can be set with the external resistor at
pin 4. Both current and voltage loop compensations are done externally
to allow full user control.
There are many kinds of protection features incorporated to make sure of safe system operation conditions, such as
brown-out protection, output under voltage detection and peak current limitation. The inside reference is adjusted
(5V±2%) to make sure control level and precise protection. There is a particular soft-start function to limit the start up
current and thus reduces the stress on the boost diode.
 FEATURES
* Supports wide input range
* Average current control
* Ease of use with few external components
* External current and voltage loop compensation
* Trimmed internal reference voltage (5V±2%)
* Programmable operating/switching frequency
* (50kHz ~ 250kHz)
* Max duty cycle of 95% (typ) at 125kHz
* Under voltage lockout
* Cycle by cycle peak current limiting
* Over-voltage protection
* Open loop detection
* Output under-voltage detection
* Brown-out protection
* Soft Over current Protection
* Enhanced dynamic response
 ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
L8565L-S08-R
L8565G-S08-R
L8565L-S08-T
L8565G-S08-T
Package
SOP-8
SOP-8
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 13
QW-R114-004.d