CM6503/4
8-PIN S
INGLE
PFC C
ONTROLLER
W
ITH
GENERAL DESCRIPTION
The 8 pin single PFC controller with 50% PWM clock ,
CM6503/4 is a space-saving controller for power factor
corrected, switched mode power supplies that offers very
low start-up and operating currents. For the power supply
less than 500Watt, its performance could be very close to
CM6800 or ML4800 architecture. Its IAC has dual function.
8 pin CM6503/4 does not require and bleed resistors. It use
IAC pin during the start up condition to start up CM6503/4.
After CM6503/4 is on, IAC will switch itself back to the IAC
function.
Power Factor Correction (PFC) offers the use of smaller,
lower cost bulk capacitors, reduces power line loading and
stress on the switching FETs, and results in a power supply
fully compliant to IEC1000-3-2 specifications. The
CM6503/4 includes circuits for the implementation of a
leading edge, average current “boost” type PFC and a
trailing edge, PWM Clock signal which will not turn on until
PFC boost output reaches steady state.
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The CM6503’s PFC and PWM Clock operate at the same
frequency, 67kHz. The PFC frequency of the CM6504 is
automatically set at half that of the 134kHz PWM. This
higher frequency allows the user to design with smaller
PWM components while maintaining the optimum operating
frequency for the PFC. An PFC OVP comparator shuts
down the PFC section in the event of a sudden decrease in
load. The PFC section also includes peak current limiting
for enhanced system reliability.
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50%
PWM C
LOCK
S
IGNAL
FEATURES
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Enable lowest BOM for power supply with PFC
Patented slew rate enhanced voltage error amplifier with
advanced input current shaping technique
Universal Line Input Voltage
No bleed resistor required
CCM boost or DCM boost with leading edge modulation
PFC using Input Current Shaping Technique
Feedforward IAC pin to do the automatic slope
compensation
PFCOVP, TriFault Detect, PFC VCCOVP, Precision -1V
PFC ILIMIT
Low supply currents; start-up: 100uA typical, operating
current: 2mA typical.
Synchronized leading PFC and trailing edge modulation
PWM Clock for the down stream DC to DC stage to reduce
ripple current in the storage capacitor between the PFC and
PWM sections and to reduce switching noise in the system
VINOK Comparator to guarantee to enable PWM Clock
when PFC reach steady state
UVLO, VREFOK, and brownout protection
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
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Desktop PC Power Supply
AC Adaptor
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
DIP-08 (P08)
Top View
1
2
3
4
PFCOUT
GND
ISENSE
VEAO
PW MCLK
VCC
IAC
V
FB
8
7
6
5
2002/07/16
Preliminary
Rev. 0.2
Champion Microelectronic Corporation
Page 1
CM6503/4
8-PIN S
INGLE
PFC C
ONTROLLER
W
ITH
ORDERING INFORMATION
Part Number
CM6503IP
CM6504IP
Temperature Range
-40℃ to 125℃
-40℃ to 125℃
Package
8-Pin PDIIP (P08)
8-Pin PDIP (P08)
50%
PWM C
LOCK
S
IGNAL
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are those values beyond which the device could be permanently damaged.
Parameter
V
CC
MAX
IAC (after start up)
I
SENSE
Voltage
PFC OUT
PWM Clock
VEAO
Voltage on Any Other Pin
I
CC
Current (Average)
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 (θ
JA
)
PDIP-08
SOP-08
Min.
GND-0.3
-5
GND – 0.3
GND – 0.3
0
GND – 0.3
Max.
23
1.0
0.7
VCC + 0.3
VCC + 0.3
6.3
VREF + 0.3
40
0.5
0.5
1.5
150
150
125
260
80
Units
V
V
V
V
V
V
V
mA
A
A
µJ
℃
℃
℃
℃
℃/W
-65
-40
ELECTRICAL CHARACTERISTICS
T
A
=Operating Temperature Range (Note 1)
Unless otherwise stated, these specifications apply Vcc=+15V,
Symbol
Parameter
Test Conditions
Voltage Error Amplifier (g
mv
)
CM6503/4
Min.
0
Typ.
Max.
5
65
2.5
-0.5
5.8
6.0
0.1
0.4
-35
40
60
60
1000
1150
90
2.55
-1.0
Unit
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 Impedance
11V < V
CC
< 16.5V
IAC
ISENSE = 0V
V
FB
= 3V, VEAO = 6V
V
FB
= 1.5V, VEAO = 1.5V
Note 2
V
NONINV
= V
INV
, VEAO = 3.75V
V
µmho
V
µA
V
V
µA
µA
dB
dB
Ohm
30
2.45
-20
30
50
50
850
2002/07/16
Preliminary
Rev. 0.2
Champion Microelectronic Corporation
Page 3
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