CS1501
Digital Power Factor Correction Control IC
Features
& Description
Digital EMI Noise Shaping
Adaptive Digital Energy Controller
• Excellent Efficiency Under All Load and Line Conditions
• Zero-voltage Switching Topology
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.
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
& Description
LCD and LED TVs
Notebooks
Server/Telecom
Ordering Information
See
V
rect
L
B
D1
V
link
BR1
BR1
R1
R2
R3
5
ZCD
3
IAC
STBY
V
DD
R5
R6
AC
Mains
8
VDD
1
IFB
GD
C1
7
4
Q1
C2
CS1501
CS
GND
Regulated
DC Output
BR 1
BR 1
R4
2
6
R7
Preliminary Product Information
Cirrus Logic, Inc.
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright
Cirrus Logic, Inc. 2011
(All Rights Reserved)
JUN ’11
DS927PP6
CIRRUS [ CIRRUS LOGIC ]
