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CS1500_1

更新时间： 2024-01-03 22:13:38
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凌云 - CIRRUS 功率因数校正
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22页 1047K
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Digital Power Factor Correction IC

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Jul ?$shortyear>  
CONFIDENTIAL  
CS1500  
Digital Power Factor Correction IC  
Features & Description  
Description  
Digital EMI Noise Shaping  
The CS1500 is a high-performance power factor correction (PFC)  
controller for universal AC input, which uses a proprietary digital  
algorithm for discontinuous conduction mode (DCM) with variable  
on-time and variable frequency control, ensuring unity power factor.  
Excellent Efficiency Under All Load Conditions  
Minimal External Devices Required  
Optimized Digital Loop Compensation  
Comprehensive Safety Features  
• Undervoltage Lockout (UVLO)  
• Output Overvoltage Protection  
• Input Current Limiting  
The CS1500 incorporates all the safety features necessary for  
robust and compact PFC stages. In addition, it has burst mode  
control to lower the light-load/standby losses to a minimum.  
Protection features such as overvoltage, overcurrent, overpower,  
open- and short-circuit protection, overtemperature, and brownout  
help protect the device during abnormal transient conditions.  
• Output Overpower Protection  
• Input Brownout Protection  
The digital controller optimizes the system stability and transient  
performance, simplifies the PFC design, reduces the external  
component count and BOM costs. The simple design and  
minimum cost makes CS1500 the ideal choice for PFC up to 300  
watts.  
• Open/short Loop Protection for IAC & FB Pins  
• Thermal Shutdown  
Pin Assignments  
NC  
STBY  
IAC  
1
2
3
4
8
7
6
5
NC  
VDD  
GD  
FB  
GND  
8-lead SOIC  
D1  
D2  
LB  
RAC  
RFB  
R1a  
R2a  
R2b  
R1b  
8
1
3
7
5
BR1  
NC  
NC  
FB  
Regulated  
DC Output  
4
2
C1  
C3  
IAC  
VDD  
GND  
AC  
VDD  
Mains  
STBY  
GD  
Q1  
R3  
6
C2  
CS1500  
This document contains information for a product under development.  
Cirrus Logic reserves the right to modify this product without notice.  
Advance Product Information  
Cirrus Logic, Inc.  
http://www.cirrus.com  
JUL ‘10  
DS849A7  
Copyright Cirrus Logic, Inc. 2010  
(All Rights Reserved)  
1234567...22

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