CS1501 Datasheet, PDF (1/16 Pages) Cirrus Logic – Digital Power Factor Correction Control IC

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
 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
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.
Ordering Information
See page 15.
BR1
AC
Mains
BR 1
V_{r ec t}
L_B
BR1
R1
V_DD
R5
R2
C1
R6
R3
8
1
5 _ZCD
VDD IFB
GD ⁷
CS1501
3 _IAC
CS ⁴
BR 1
STBY GND
R4
2
6
D1
V_link
Q1
C2 _Regulated
DC Output
R7
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Cirrus Logic, Inc.
http://www.cirrus.com
Copyright  Cirrus Logic, Inc. 2011
(All Rights Reserved)
JUN ’11
DS927PP6