Cirrus Logic CS1501 - Manual

Copyright  Cirrus Logic, Inc. 2012
(All Rights Reserved)
Cirrus Logic, Inc.
http://www.cirrus.com
CS1501
Digital Power Factor Correction Control IC
Features
 Digital EMI Noise Shaping
 Adaptive Digital Energy Controller
• Excellent Efficiency Under All Load and Line Conditions
• Zero-voltage Switching Topology
 Minimal External Devices Required
 Adaptive Digital Control Loop
 Comprehensive Safety Features
• Undervoltage Lockout (UVLO)
• Output Overvoltage Protection
• Cycle-by-cycle Current Limiting
• Open/Short Loop Protection for IAC & IFB Pins
• Thermal Shutdown
 Pin Placement Similar to Traditional Boundary Mode (CRM)
Controllers
Applications
 LCD and LED TVs
 Notebooks
 Server/Telecom
Overview
The CS1501 is a high-performance digital power factor
correction (PFC) controller designed for switching mode power
supply (SMPS) applications. The CS1501 actively manages
the power factor correction while achieving high efficiency over
a wide load range.
The CS1501 adaptively controls the input AC current so that it
is in phase with the AC mains voltage, and its waveform mimics
the input voltage waveform. The PFC controller executes
adaptive digital algorithms designed to shape the AC mains
input current waveform to be in phase with the input voltage
waveform.
The CS1501 is equipped with a zero-current detection (ZCD)
circuit providing the PFC digital controller the capability to turn
on the MOSFET when the voltage across the drain and source
is near zero. Additionally, a current-sensing circuit is
incorporated for instantaneous overcurrent protection.
R1
R2 R3
R4 R7
R5
R6
8 1
D1
C1 C2 Regulated
DC Output
Q1
AC
Mains
BR 1
BR1
BR 1
BR1
CS1501
GD ZCD
IFB
GND
CS IAC
VDD
L
B
6
3
5 7
4
V
DD
STBY
2
V
link
V
rect
FEB’12
DS927F4
Ordering Information
See page 16.