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參數(shù)資料
| 型號： | CM6824IS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO |
| 中文描述： | 低啟動電流式PFC / PWM控制器組合 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 342K |
| 代理商： | CM6824IS |
CM6824
L
OW
S
TART-
U
P
C
URRENT
PFC/PWM C
ONTROLLER
C
OMBO
GENERAL DESCRIPTION
The CM6824 is a controller for power factor corrected,
switched mode power suppliers. Power Factor Correction
(PFC) allows the use of smaller, lower cost bulk capacitors,
reduces power line loading and stress on the switching
FETs, and results in a power supply that fully compiles with
IEC-1000-3-2 specifications. Intended as a BiCMOS
version of the industry-standard ML4824, CM6824 includes
circuits for the implementation of leading edge, average
current, “boost” type power factor correction and a trailing
edge, pulse width modulator (PWM). Gate-driver with 1A
capabilities minimizes the need for external driver circuits.
Low power requirements improve efficiency and reduce
component costs.
An over-voltage comparator shuts down the PFC section in
the event of a sudden decrease in load. The PFC section
also includes peak current limiting and input voltage
brownout protection. The PWM section can be operated in
current or voltage mode, at up to 250kHz, and includes an
accurate 50% duty cycle limit to prevent transformer
saturation.
2002/09/20
Preliminary
Rev. 1.1
Champion Microelectronic Corporation
Page 1
FEATURES
!
Patent Filed #5,565,761, #5,747,977, #5,742,151,
#5,804,950, #5,798,635
!
Pin to pin compatible with ML4800 and FAN6800/1
!
Additional folded-back current limit for PWM section.
!
23V Bi-CMOS process
!
VIN OK guaranteed turn on PWM at 2.5V instead of 1.5V
!
Internally synchronized leading edge PFC and trailing edge
PWM in one IC
!
Slew rate enhanced transconductance error amplifier for
ultra-fast PFC response
!
Low start-up current (100μA typ.)
!
Low operating current (3.0mA type.)
!
Low total harmonic distortion, high PF
!
Reduces ripple current in the storage capacitor between the
PFC and PWM sections
!
Average current, continuous or discontinuous boost leading
edge PFC
!
VCC OVP Comparator, Low Power Detect Comparator
!
PWM configurable for current mode or voltage mode
operation
!
Current fed gain modulator for improved noise immunity
!
Brown-out control, over-voltage protection, UVLO, and soft
start, and Reference OK
24 Hours Technical Support---WebSIM
Champion provides customers an online circuit simulation tool
called WebSIM. You could simply logon our website at
www.champion-micro.com for details.
APPLICATIONS
PIN CONFIGURATION
!
Desktop PC Power Supply
!
Internet Server Power Supply
!
IPC Power Supply
!
UPS
!
Battery Charger
!
DC Motor Power Supply
!
Monitor Power Supply
!
Telecom System Power Supply
!
Distributed Power
SOP-16 (S16) / PDIP-16 (P16)
Top View
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IEAO
I
AC
I
SENSE
V
RMS
SS
V
DC
RAMP1
RAMP2
VEAO
V
FB
V
REF
V
CC
PFC OUT
PWM OUT
GND
DC I
LIMIT
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