JW1571
JW1571 is Offline Boost PFC CV Controller manufactured by JoulWatt Technology.
DESCRIPTION
The JW®1571 is a constant voltage controller with high voltage accuracy which applies to single stage boost power factor correction (PFC) applications. Constant on time control strategy ensures high power factor, and the input voltage detection circuit is not needed, which simplifies the system design and saves the loss.
Critical conduction mode operation reduces the switching losses, improves the EMI performance and largely increases the efficiency.
JW1571 has multi-protection functions which largely enhance the safety and reliability of the system, including VCC UVLO, CS over voltage protection, FB over voltage protection and over temperature protection.
The JW1571 is available in SOP8 package. pany’s Logo is Protected, “JW” and “JOULWATT” are Registered Trademarks of Joul Watt technology Inc.
TYPICAL APPLICATION
FEATURES
- Low Quiescent Current
- +0.6A/-1.4A Peak Gate Drive Current
- High Power Factor and Low THD
- Critical Conduction Mode
- High Reference Voltage Accuracy
- High Efficiency over Wide Operating Range
- Reduce Frequency at Light Load
- Open Feedback Protection
- Disable Function
- Pulse by Pulse Current Limit by CS Voltage
- External Over Temperature Protection
- 2nd OVP
- SOP8 Package
APPLICATIONS
- SMPS
- AC-DC Adapter
- Flat TV
ͨʢ±´úEMI
AC Filter
B~ ~
Lb
Naux
5 FB
Rup VCCCVIN
VCC 4
6 OTP
CS 3
Qb
Cin
RZCD
7 NC
GND...
