CM6802A/B/AH/BH
(Dynamic Soft PFC/Green PWM)
http://www.championmicro.com.tw
EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER
Design for High Efficient Power Supply at both Full Load and Light Load
GENERAL DESCRIPTION
Switching to CM6802A/B/AH/BH from your existing
CM6800 family boards can gain the following advanced
performances:
1.)
2.)
3.)
Around 2% efficiency gain when the output load is
below 40% of the full load.
Hold Up time can be increased ~ 30% from the
existing 6800 power supply.
420V bulk capacitor value may be reduced PFC
boost ripple current can be reduced; therefore, the
boost inductor core size maybe reduced.
No Load Consumption can be reduced 290mW at
270VAC.
PWM transformer size can be smaller.
To design 12V, 5V and 3.3V output filters can be
easy.
The stress over the entire external power device is
reduced and EMI noise maybe reduced.
Monotonic Output design is easy and more…Of
cause, the cost will be reduced.
FEATURES
Patents Pending
Pin to pin compatible
ML4800 and FAN4800.
23V Bi-CMOS process.
Designed for EPA/80++ efficiency.
CM6802A/B : Selectable Boost output from 380V to
300V during light load.
CM6802AH/BH: Selectable Boost output from 380V to
342V during light load.
All high voltage resistors can be greater than 4.7 Mega
ohm (4.7 Mega to 8 Mega ohm) to improve the no load
consumption.
Rail to rail CMOS Drivers with on, 60 ohm and off, 30
ohm for both PFC and PWM with two 17V zeners.
Fast Start-UP Circuit without extra bleed resistor to aid
VCC reaches 13V sooner.
Low start-up current (55uA typ.)
Low operating current (2.5mA typ.)
16.5V VCC shunt regulator
Leading Edge Blanking for both PFC and PWM.
fRTCT = 4*fpfc =4*fpwm for CM6802A//AH
fRTCT = 4*fpfc =2*fpwm for CM6802B/BH
Dynamic Soft PFC to ease the stress of the Power
Device and Ease the EMI filter design.
PFC Brown Out and PWM Brown Out
Internally synchronized leading edge PFC and trailing
edge PWM in one IC to Reduces ripple current in the
420V storage capacitor between the PFC and PWM
sections.
Low total harmonic distortion, THD and Power Factor
approaches 1.0.
Average current, continuous or discontinuous boost
leading edge PFC.
PWM configurable for current mode or feed-forward
voltage mode operation.
Current fed Gain Modulator for improved noise immunity.
Gain Modulator is a constant maximum power limiter.
Brown-out control, over-voltage protection, UVLO, and
soft start, and Reference OK.
PWM Short Circuit Protection
Power Fold Back Protection
Green Mode PWM for less no load consumption.
with
CM6800,CM6800A,
4.)
5.)
6.)
7.)
8.)
CM6802A/B/AH/BH is pin to pin compatible with CM6800
family.
Beside all the goodies in the CM6800, it is designed to meet
the EPA/80+ regulation. With the proper design, its
efficiency of power supply can easily approach 85%.
To start evaluating CM6802A/B/AH/BH from the exiting
CM6800,CM6800A or ML4800 board, 6 things need to be
taken care before doing the fine tune:
1.) Change RAC resistor (on pin 2, IAC) from the old
value to a higher resistor value between 4.7 Mega
ohms to 8 Mega ohms.
2.) Change RTCT pin (pin 7) from the existing value to
RT=7.75K ohm and CT=1000pF to have
fpfc=55Khz, fpwm=55Khz, frtct=220Khz.
3.) Adjust all high voltage resistor around 5 mega ohm
or higher.
4.) VRMS pin (pin 4) needs to be 1.125V at
VIN=85VAC for universal input application from line
input from 85VAC to 270VAC. Both poles for the
Vrms of the CM6802A/B/AH/BH needs to
substantially slow than CM6800 about 5 to 10 times.
5.) At full load, the average Veao needs to around 4.5V
and the ripple on the Veao needs to be less than
250mV.
6.) Soft Start pin (pin 5), the soft start current has been
reduced
from
CM6800’s
20uA
to
CM6802A/B/AH/BH’s 10uA.Soft Start capacitor can
be reduced to 1/2 from your original CM6800
capacitor.
2009/11/02
Rev. 1.4
Champion Microelectronic Corporation
1
CM6802A/B/AH/BH
(Dynamic Soft PFC/Green PWM)
http://www.championmicro.com.tw
EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER
Design for High Efficient Power Supply at both Full Load and Light Load
APPLICATIONS
EPA/80++ related Power Supply
Desktop PC Power Supply
Internet Server Power Supply
LCD Power Supply
PDP 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)
1
2
3
4
5
6
7
8
I
EAO
I
AC
I
SENSE
V
RMS
SS
V
DC
R
AMP1
R
AMP2
V
EAO
V
FB
V
REF
V
CC
PFC OUT
PWM OUT
GND
DC I
LIMIT
16
15
14
13
12
11
10
9
PIN DESCRIPTION
Pin No.
Symbol
Description
PFC transconductance current error amplifier output
(Gmi).
IAC has 2 functions:
1. PFC gain modulator reference input.
2. At start up, IAC is connected to VCC and it helps to
reduce the startup time and it helps to reduce the no
load consumption. Typical RAC resistor is about 6 Mega
ohm to sense the line.
PFC Current Sense: for both Gain Modulator and PFC
ILIMIT comparator.
Line Input Sense pin and also, it is the brown out sense
pin.
Soft start capacitor pin; can use it to on/off the boost
Operating Voltage
Min.
0
Typ.
Max.
VREF
Unit
V
1
I
EAO
2
I
AC
0
100
uA
3
4
I
SENSE
V
RMS
-1.2
0
0.7
VCC+0.3
V
V
5
SS
follower function; it is pulled down by 300 ohm internal
resistor when DCILIMIT reach 1V; the power is limited
during the PWM Brown out.
0
10
V
2009/11/02
Rev. 1.4
Champion Microelectronic Corporation
2
CM6802A/B/AH/BH
(Dynamic Soft PFC/Green PWM)
http://www.championmicro.com.tw
EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER
Design for High Efficient Power Supply at both Full Load and Light Load
6
V
DC
RAMP 1
DC to DC PWM voltage feedback input.
0
10
V
7
(RTCT)
Oscillator timing node; timing set by RT and CT
0.8
4
V
8
In current mode, this pin functions as the current sense
input; when in voltage mode, it is the feed-forward sense
(PWM RAMP)
input from PFC output 380V (feed forward ramp).
RAMP 2
0
V
DCmax
-1.8
V
9
10
11
12
13
14
15
DC I
LIMIT
GND
PWM OUT
PFC OUT
V
CC
VREF
V
FB
PWM current limit comparator input
0
1
V
Ground
PWM driver output
0
0
10
15
7.5
0
2.5
VCC
VCC
18
V
PFC driver output
V
V
V
Positive supply for CM6802A/B/AH/BH
Maximum 4mA buffered output for the internal 7.5V
reference when VCC=14V
PFC transconductance voltage error amplifier input
3
V
16
VEAO
PFC transconductance voltage error amplifier output
(GmV)
0
6
V
ORDERING INFORMATION
Part Number
CM6802A/B/AH/BHGIP*
CM6802A/B/AH/BHGIS*
CM6802A/B/AH/BHGISTR*
CM6802A/B/AH/BHXIP*
CM6802A/B/AH/BHXIS*
CM6802A/B/AH/BHXISTR*
*Note:
G : Suffix for Pb Free Product
TR : Package is Typing Reel
X : Suffix for Halogen Free Product
Temperature Range
-40℃ to 125℃
-40℃ to 125℃
-40℃ to 125℃
-40℃ to 125℃
-40℃ to 125℃
-40℃ to 125℃
Package
16-Pin PDIP (P16)
16-Pin Narrow SOP (S16)
16-Pin Narrow SOP (S16)
16-Pin PDIP (P16)
16-Pin Narrow SOP (S16)
16-Pin Narrow SOP (S16)
2009/11/02
Rev. 1.4
Champion Microelectronic Corporation
3
CM6802A/B/AH/BH
(Dynamic Soft PFC/Green PWM)
http://www.championmicro.com.tw
EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER
Design for High Efficient Power Supply at both Full Load and Light Load
Simplified Block Diagram (CM6802A/B/AH/BH)
16
+
VEAO
1
IEAO
VFB
+
13
PFC OVP
.
2
VCC
GMv
.
2.5V
VFB
15
VCC
IAC
2
4
3
VRMS
ISENSE
-
+
PFC CMP
+
-
.
-
PFC Tri-Fault
0.5V
VFB
-1.0V
ISENSE
0.3V
VEAO
+
-
S
Q
GAIN
MODULATOR
Rmul
PFC RAMP
1
Rmul
2.85V
GMi
-
16.5V
Zener
7.5V
REFERENCE
VREF
14
VCC
PFC ILIMIT
+
-
R
Q
MPPFC
PFC OUT
12
MNPFC
17V
ZENER
S
Q
Green PFC
+
-
R
Q
PFC
PFCCLK
.
7 RAMP1
.
300
8
RAMP2
SW SPST
PWMCLK
Green PWM
VCC
REF-OK
380-OK
5
10
GND
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are those values beyond which the device could be permanently damaged.
Parameter
Min.
Max.
V
CC
18
IEAO
0
VREF+0.3
I
SENSE
Voltage
-5
0.7
PFC OUT
GND – 0.3
VCC + 0.3
GND – 0.3
VCC + 0.3
PWMOUT
GND – 0.3
VCC + 0.3
Voltage on Any Other Pin
5
I
REF
1
I
AC
Input Current
Peak PFC OUT Current, Source or Sink
0.5
Peak PWM OUT Current, Source or Sink
0.5
PFC OUT, PWM OUT Energy Per Cycle
1.5
Junction Temperature
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering, 10 sec)
Thermal Resistance (θ
JA
)
Plastic DIP
Plastic SOIC
Power Dissipation (PD) T
A
<50℃
ESD Capability, HBM Model
ESD Capability, CDM Model
-65
-40
150
150
125
260
80
105
800
5.5
1250
Units
V
V
V
V
V
V
mA
mA
A
A
μ
J
℃
℃
℃
℃
℃/W
℃/W
mW
KV
V
2009/11/02
Rev. 1.4
Champion Microelectronic Corporation
+
9
DC ILIMIT
1.0V
-
-
-
VDC
6
VREF+2.5V
10uA
+
S
S
R
Q
Q
1.8V
PPWM
PWM OUT
11
NPFC
17V
ZENER
VFB
2.36V
-
.
+
380V-OK
VCC
DC ILIMIT
UVLO
4
嵌入式系统
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