SD7530_Datasheet
HIGH POWER FACTOR FLYBACK PWM CONTROLLER
DESCRIPTION
SD7530 is a high power factor flyback PWM controller special for
LED lighting applications.
SD7530 features a high performance analog multiplier for power
factor correction (PFC), zero current detector (ZCD) to ensure TM
operation. It integrates a current sensing comparator with built-in
leading-edge blanking, and a totem-pole output stage capable of
-600mA /800mA current suited for big MOSFET.
SD7530 has a built-in soft-start circuit to avoid the over voltage
output under light load start, reduce MOSFET’s voltage stress,
and improve circuit’s reliability.
SD7530 has a built-in output short-circuit protection circuit, in this
way the current of the system is considerably reduced to avoid the APPLICATIONS
damage to IC. SD7530 includes VCC under voltage lockout, VCC over voltage
* LED Daylight lamp
protection, and over temperature protection, etc.
FEATURES
* Transition Mode (TM) operation * High-performance analog multiplier * Built-in restart timer * Integrate digital LEB * Low start-up current (5μA) * Audio noise free * Built-in soft start circuit * Very low power dissipation of output short-circuit protection
(SCP) * VCC under vltage lockout with hysteresis (UVLO) * VCC over-voltage protection (VCCOVP) * Over temperature protection (OTP)
ORDERING INFORMATION
Part No. SD7530S SD7530STR
Package SOP-8-225-1.27 SOP-8-225-1.27
Marking SD7530S SD7530S
Material Halogen free Halogen free
Packing Tube
Tape&Reel
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.1
2013.07.24 Page 1 of 10
Silan Microelectronics
SD7530_Datasheet
BLOCK DIAGRAM
5 ZCD
CLAMP 1.1V/0.25V
++-
VCC UVLO
VCC 8 17.5V/9.0V VCC
OVP
+-
4 CS
LEB
COMPA
LOGIC CONTRL
GATE DRIVE
OUT 7
MULTIPLIER
3 MULT
GND 6
SOFT START
COMP 2
OTP SCP
+-
ERROR AMP
VREF
INV 1
ABSOLUTE MAXIMUM RATINGS
Characteristics Supply voltage (ICC<20mA) Peak drive output current Voltage on analog input and output pins Maximum current of zero current detector Power dissipation (ambient temperature: 50°C) Operating temperature range Storage temperature range Junction temperature Thermal resistance from chip surface to the ambient
Symbol VCC
IOH/IOL -
Pdiss
Tamb Tstg Tj
Rth(j-a)
Rating 40
-600/800 -0.3 ~ 8
±10
0.65
-40~+120 -55~+150
+150
150
Unit V mA V mA
W
°C °C °C °C/W °C/W
ELECTRICAL CHARACTERISTICS(Unless otherwise stated, VCC=22V;CO=1nF;-25°C