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CM6824 데이터시트 PDF




Champion Microelectronic에서 제조한 전자 부품 CM6824은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 CM6824 기능
기능 LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
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CM6824 데이터시트, 핀배열, 회로
CM6824
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
GENERAL DESCRIPTION
FEATURES
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.
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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
! 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
PIN CONFIGURATION
SOP-16 (S16) / PDIP-16 (P16)
Top View
1
IEAO
VEAO
16
2 IAC
VFB 15
3
ISENSE
VREF
14
4
VRMS
VCC
13
5
SS PFC OUT
12
6
VDC
PWM OUT
11
7
RAMP1
GND
10
8
RAMP2
DC ILIMIT
9
2002/09/20 Preliminary Rev. 1.1
Champion Microelectronic Corporation
Page 1




CM6824 pdf, 반도체, 판매, 대치품
CM6824
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are those values beyond which the device could be permanently damaged.
Parameter
VCC
IEAO
ISENSE Voltage
PFC OUT
PWMOUT
Voltage on Any Other Pin
IREF
IAC Input Current
Peak PFC OUT Current, Source or Sink
Peak PWM OUT Current, Source or Sink
PFC OUT, PWM OUT Energy Per Cycle
Junction Temperature
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering, 10 sec)
Thermal Resistance (θJA)
Plastic DIP
Plastic SOIC
Min.
0
-5
GND – 0.3
GND – 0.3
GND – 0.3
-65
-40
Max.
23
4.5
0.7
VCC + 0.3
VCC + 0.3
VREF + 0.3
10
1
1
1
1.5
150
150
125
260
80
105
Units
V
V
V
V
V
V
mA
mA
A
A
µJ
/W
/W
ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply Vcc=+15V, RT
= 52.3k, CT = 470pF, TA=Operating Temperature Range (Note 1)
Symbol
Parameter
Input Voltage Range
Transconductance
Feedback Reference Voltage
Input Bias Current
Output High Voltage
Output Low Voltage
Sink Current
Source Current
Open Loop Gain
Power Supply Rejection Ratio
Input Voltage Range
Transconductance
Input Offset Voltage
Input Bias Current
Output High Voltage
Output Low Voltage
Test Conditions
Voltage Error Amplifier (gmv)
VNONINV = VINV, VEAO = 3.75V
Note 2
VFB = 3V, VEAO = 6V
VFB = 1.5V, VEAO = 1.5V
11V < VCC < 16.5V
Current Error Amplifier (gmi)
VNONINV = VINV, VEAO = 3.75V
Min.
CM6824
Typ.
Max.
Unit
0 5V
50 85 120 µmho
2.45 2.5 2.55
V
-1.0 -0.5
µA
5.8 6.0
V
0.1 0.4
V
-35 -20 µA
30 40
µA
50 60
dB
50 60
dB
-1.5 0.7 V
130 195 310 µmho
-12 12 mV
-1.0 -0.5
µA
4.0 4.25
V
0.65 1.0
V
2002/09/20 Preliminary Rev. 1.1
Champion Microelectronic Corporation
Page 4

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CM6824 전자부품, 판매, 대치품
CM6824
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
TYPICAL PERFORMANCE CHARACTERISTIC
127
120
113
106
99
92
85
78
71
64
57
2
2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9
VFB (V)
3
Voltage Error Amplifier (gmv) Transconductance
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
VRMS (V)
Gain Modulator Transfer Characteristic (K)
K
=
IGAINMOD
IAC x (6
IOFFSET
- 0.625)
mV
-
1
220
200
180
160
140
120
100
80
60
40
20
0
-500 -400 -300 -200 -100 0 100 200 300 400 500
ISENSE (mV)
Current Error Amplifier (gmi) Transconductance
2.2
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
VRMS (V)
Gain
Gain
=
ISENSE IOFFSET
IAC
2002/09/20 Preliminary Rev. 1.1
Champion Microelectronic Corporation
Page 7

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CM6824

LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO

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