CM6802SAH/SBH
http://www.championmicro.com.tw
(Turbo-Speed PFC+Green PWM)
EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER
Design for High Efficient Power Supply at both Full Load and Light Load
GENERAL DESCRIPTION
CM6802SAH/SBH is a turbo-speed PFC and a Green PWM
controller. It is designed to further increase power supply
efficiency while using the relatively lower 380V Bulk
Capacitor value.
Switching to CM6802SAH/SBH from your existing CM6800
family boards can gain the following advanced
performances:
Around 2% efficiency gain when the output load is
below 40% of the full load
2.) Hold Up time can be increased ~ 30% from the
existing 6800 power supply
3.) Turbo Speed PFC may reduce 420 Bulk Capacitor
size
4.) 420V bulk capacitor value may be reduced and PFC
Boost Capacitor ripple current can be reduced
5.) No Load Consumption can be reduced 290mW at
270VAC
6.) Better Power Factor and Better THD
7.) Clean Digital PFC Brown Out
8.) PWM transformer size can be smaller
9.) Superior Surge Noise Immunity
10.) To design 12V, 5V, and 3.3V output filters can be
easy
11.) The stress over the entire external power device is
reduced and EMI noise maybe reduced; PFC inductor
core might be reduced
12.) Monotonic Output design is easy
13.) And more… Of course, the cost can be reduced
CM6802SAH/SBH is pin to pin compatible with CM6800
family.
Beside all the goodies in the CM6800, it is designed to meet
the EPA/85+ regulation. With the proper design, its efficiency
of power supply can easily approach 85%.
To start evaluating CM6802SAH/SBH 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
ohm to 8 Mega ohm. Start with 6 Mega ohm for RAC
first.
2.) Change RTCT pin (pin 7) from the existing value to
RT=5.88K ohm and CT=1000pF to have
fpfc=68Khz,
fpwm=68Khz,
frtct=272Khz
for
CM6802SAH and
fpfc=68Khz, fpwm=136Khz,
frtct=272Khz for CM6802SBH
3.) Adjust all high voltage resistor around 5 mega ohm or
higher.
4.) VRMS pin(pin 4) needs to be 1.14V at VIN=80VAC
for universal input application from line input from
80VAC to 270VAC. Both poles for the Vrms of the
CM6802SAH/SBH 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 when the load triggers the light load
comparator.
6.) Soft Start pin (pin 5), the soft start current has been
reduced from CM6800’s 20uA to CM6802SAH/SBH’s
10uA.Soft Start capacitor can be reduced to 1/2 from
your original CM6800 capacitor.
1.)
FEATURES
Patents Pending
Pin to pin compatible
ML4800, and FAN4800
23V Bi-CMOS process
Designed for EPA/85+ efficiency
Selectable Boost output from 380V to 342V during light
load
Digitized Exactly 50% Maximum PWM Duty Cycle
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 CM6802SAH
fRTCT = 4*fpfc =2*fpwm for CM6802SBH
Dynamic Soft PFC to ease the stress of the Power
Device and Ease the EMI filter design
Clean Digital PFC Brown Out and PWM Brown Out
Turbo Speed PFC may reduce 420 Bulk Capacitor size
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
Better Power Factor and Better THD
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
Precision Current Limit, over-voltage protection, UVLO,
soft start, and Reference OK
with
CM6800,
CM6800A,
2009/11/02
Rev. 1.5
Champion Microelectronic Corporation
1
CM6802SAH/SBH
http://www.championmicro.com.tw
(Turbo-Speed PFC+Green PWM)
EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER
Design for High Efficient Power Supply at both Full Load and Light Load
APPLICATIONS
EPA/85+ 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:
Operating Voltage
Min.
0
Typ.
Max.
VREF
Unit
V
1
I
EAO
2
I
AC
1. PFC gain modulator reference input.
2. 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
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 70K ohm internal
resistor when DCILIMIT reach 1V; the power is limited
during the PWM Brown out.
0
10
V
2009/11/02
Rev. 1.5
Champion Microelectronic Corporation
2
CM6802SAH/SBH
http://www.championmicro.com.tw
(Turbo-Speed PFC+Green PWM)
EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER
Design for High Efficient Power Supply at both Full Load and Light Load
6
V
DC
RAMP1
DC to DC PWM voltage feedback input.
0
10
V
7
(RTCT)
RAMP 2
8
(PWM
RAMP)
9
10
11
12
13
14
15
16
DC I
LIMIT
GND
PWM OUT
PFC OUT
V
CC
VREF
V
FB
VEAO
Oscillator timing node; timing set by RT and CT
0.8
4
V
In current mode, this pin functions as the current
sense input; when in voltage mode, it is the
feed-forward sense input from PFC output 380V (feed
forward ramp).
0
V
DCmax
-
1.8
V
PWM current limit comparator input
Ground
PWM driver output
PFC driver output
Positive supply for CM6802SAH/SBH
Maximum 3.5mA buffered output for the internal 7.5V
reference when VCC=14V
PFC transconductance voltage error amplifier input
PFC transconductance voltage error amplifier output
(GmV)
0
1
V
0
0
10
15
7.5
0
0
2.5
VCC
VCC
20
V
V
V
V
3
6
V
V
ORDERING INFORMATION
Part Number
CM6802SAH/SBHGIP*
CM6802SAH/SBHGIS*
CM6802SAH/SBHGISTR*
CM6802SAH/SBHXIP*
CM6802SAH/SBHXIS*
CM6802SAH/SBHXISTR*
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)
*Note:
G : Suffix for Pb Free Product
X : Suffix for Halogen Free Product
TR : Package is Typing Reel
2009/11/02
Rev. 1.5
Champion Microelectronic Corporation
3
CM6802SAH/SBH
http://www.championmicro.com.tw
(Turbo-Speed PFC+Green PWM)
EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER
Design for High Efficient Power Supply at both Full Load and Light Load
Simplified Block Diagram (CM6802SAH/SBH)
16
+
VEAO
1
IEAO
VFB
+
13
PFC OVP
.
VCC
GMv
.
2.5V
VFB
15
IAC
2
4
3
7
VRMS
ISENSE
Rmul
+
-
2.85V
GMi
.
-
16.5V
Zener
-
PFC CMP
+
-
PFC Tri-Fault
0.5V
VFB
-1.0V
ISENSE
0.3V
VEAO
+
-
S
Q
7.5V
REFERENCE
VREF
14
GAIN
MODULATOR
Rmul
PFC RAMP
VCC
PFC ILIMIT
+
-
R
Q
MPPFC
PFC OUT
12
MNPFC
17V
ZENER
S
Q
Green PFC
+
-
R
Q
PFC
RAMP1
PFCCLK
.
2K
8
RAMP2
SW SPST
PWMCLK
.
Green PWM
PPWM
+
S
S
R
Q
Q
VCC
VREF+2.5V
10uA
REF-OK
380-OK
5
SS
70K
10
GND
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are those values beyond which the device could be permanently damaged.
Parameter
Min.
Max.
V
CC
20
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
3.5
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. 1.5
Champion Microelectronic Corporation
+
9
DC ILIMIT
-
-
-
6
VDC
1.8V
PWM OUT
11
NPFC
17V
ZENER
VFB
2.36V
-
.
+
380V-OK
1.0V
VCC
DC ILIMIT
UVLO
4
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