Champion CM6802AGIP, CM6802AGIS, CM6802AHGIP, CM6802AHGIS, CM6802AHXIP Schematics

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 FEATURES

Switching to CM6802A/B/AH/BH from your existing CM6800 family boards can gain the following advanced performances:

1.) 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.) 420V bulk capacitor value may be reduced PFC boost ripple current can be reduced; therefore, the boost inductor core size maybe reduced.

4.) No Load Consumption can be reduced 290mW at 270VAC.

5.) PWM transformer size can be smaller.

6.) To design 12V, 5V and 3.3V output filters can be easy.

7.) The stress over the entire external power device is reduced and EMI noise maybe reduced.

8.) Monotonic Output design is easy and more…Of cause, the cost will be reduced.

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.



Patents Pending

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Pin to pin compatible with CM6800,CM6800A,

ML4800 and FAN4800.

23V Bi-CMOS process.

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Designed for EPA/80++ efficiency.

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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

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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

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ohm for both PFC and PWM with two 17V zeners.

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Fast Start-UP Circuit without extra bleed resistor to aid

VCC reaches 13V sooner.

Low start-up current (55uA typ.)

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Low operating current (2.5mA typ.)

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16.5V VCC shunt regulator

Leading Edge Blanking for both PFC and PWM.

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fRTCT = 4*fpfc =4*fpwm for CM6802A//AH



fRTCT = 4*fpfc =2*fpwm for CM6802B/BH

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Dynamic Soft PFC to ease the stress of the Power

Device and Ease the EMI filter design.

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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

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approaches 1.0.

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Average current, continuous or discontinuous boost leading edge PFC.

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PWM configurable for current mode or feed-forward voltage mode operation.

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Current fed Gain Modulator for improved noise immunity.

Gain Modulator is a constant maximum power limiter.

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Brown-out control, over-voltage protection, UVLO, and

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soft start, and Reference OK.

PWM Short Circuit Protection

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Power Fold Back Protection

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Green Mode PWM for less no load consumption.

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2012/05/10

Rev. 1.5

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 PIN CONFIGURATION

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EPA/80++ related Power Supply



Desktop PC Power Supply

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Internet Server Power Supply

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LCD Power Supply



PDP Power Supply



IPC Power Supply

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UPS

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Battery Charger



DC Motor Power Supply

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Monitor Power Supply

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Telecom System Power Supply

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Distributed Power

SOP-16 (S16) / PDIP-16 (P16)

EAO

1

2

3

4

5

6

7

8

I

AC

I

SENSE

V

RMS

SS

DC

V

R

AMP1

AMP2

R

V

EAO

V

FB

V

REF

CC

V

PFC OUT

PWM OUT

GND

LIMIT

DC I

16

15

14

13

12

11

10

9

PIN DESCRIPTION

Pin No. Symbol Description

1

2

3

I

EAO

I

AC

I

SENSE

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.

Operating Voltage

Min. Typ. Max. Unit

0 VREF V

0 100 uA

-1.2 0.7 V

4

V

RMS

5 SS

2012/05/10

Rev. 1.5

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

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 VCC+0.3 V

0 10 V

Champion Microelectronic Corporation 2

CM6802A/B/AH/BH

(Dynamic Soft PFC/Green PWM)

http://www.championmicro.com.tw

Design for High Efficient Power Supply at both Full Load and Light Load

6 VDC

RAMP 1

7

8

9 DC I

10 GND

11 PWM OUT

(RTCT)

RAMP 2

(PWM RAMP)

LIMIT

DC to DC PWM voltage feedback input.

Oscillator timing node; timing set by RT and CT

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).

PWM current limit comparator input

Ground

PWM driver output

EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER

0 10 V

0.8 4 V

0 V

0 1 V

0 VCC V

DCmax

-1.8 V

12 PFC OUT

13 VCC

14 VREF

15 VFB

16 VEAO

PFC driver output

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

PFC transconductance voltage error amplifier output

(GmV)

ORDERING INFORMATION

Part Number Temperature Range Package

CM6802A/B/AH/BHGIP*

CM6802A/B/AH/BHGIS*

CM6802A/B/AH/BHGISTR*

CM6802A/B/AH/BHXIP*

CM6802A/B/AH/BHXIS*

CM6802A/B/AH/BHXISTR*

G : Suffix for Pb Free Product

*Note:

TR : Package is Typing Reel

X : Suffix for Halogen Free Product

-40℃ to 125℃

0 VCC

10 15 18 V

7.5 V

0 2.5 3 V

0 6 V

16-Pin PDIP (P16)

16-Pin Narrow SOP (S16)

16-Pin PDIP (P16)

16-Pin Narrow SOP (S16)

V

2012/05/10

Rev. 1.5

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)

GMi

+

-

1

IEAO

.

PFC RAMP

.

2.36V

PFC CMP

+

-

VFB

-

+

380V-OK

VFB

2.85V

0.5V VFB

-1.0V

ISENSE

0.3V

VEAO

Green PWM

.

1.0V

PFC OVP

+

-

PFC Tri-Fault

+

-

PFC ILIMIT

+

-

Green PFC

+

-

+

DC ILIMIT

.

VFB

15

IAC

2

VRMS

4

ISENSE

3

RAMP1

7

RAMP2

8

VDC

6

VREF+2.5V

5

DC ILIMIT

9

GND

10

2.5V

VCC

10uA

16

GMv

+

.

-

GAIN

MODULATOR

300

SW SPST

1.8V

REF-OK

VEAO

PFC

380-OK

Rmu l

PFCCLK

PWMCLK

+

-

Rmul

VCC

16.5V Zener

1 2

SRQ

S

UVLO

REFERENCE

Q

13

7.5V

VCC

MPPFC

MNPFC

PPWM

NPFC

VCC

PFC OUT

VCC

PWM OUT

VREF

17V

ZENER

17V

ZENER

14

12

11

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum ratings are those values beyond which the device could be permanently damaged.

Parameter Min. Max. Units

VCC 18 V IEAO 0 VREF+0.3 V I

Voltage -5 0.7 V

SENSE

PFC OUT PWMOUT Voltage on Any Other Pin I

REF

IAC Input Current

GND – 0.3 VCC + 0.3 V GND – 0.3 VCC + 0.3 V GND – 0.3 VCC + 0.3 V 5 mA 1 mA

Peak PFC OUT Current, Source or Sink 0.5 A Peak PWM OUT Current, Source or Sink 0.5 A PFC OUT, PWM OUT Energy Per Cycle 1.5

Junction Temperature 150 Storage Temperature Range -65 150 Operating Temperature Range -40 125 Lead Temperature (Soldering, 10 sec) 260 Thermal Resistance (θJA)

Plastic DIP Plastic SOIC

Power Dissipation (PD) TA<50℃

80 105

800 mW

J

μ

℃ ℃ ℃ ℃

℃/W ℃/W

ESD Capability, HBM Model 5.5 KV ESD Capability, CDM Model 1250 V

2012/05/10

Rev. 1.5

Champion Microelectronic Corporation 4

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

ELECTRICAL CHARACTERISTICS:

Unless otherwise stated, these specifications apply Vcc=+14V, RT = 7.75K kΩ, CT = 1000pF, TA=Operating Temperature

Range (Note 1)

PFC Brown Out

VRMS Threshold High

VRMS Threshold Low

Hysteresis 170 216 260 mV

AC High Line Sweep Vrms Pin 2.15 2.25 2.35 V

AC Low Line Sweep Vrms Pin 1.85 2 2.12 V

Hysteresis 200 300 mV

Room Temperature=25℃

CM6802A/B/AH/BH Symbol Parameter Test Conditions

Unit

Min. Typ. Max.

1.19 1.25 1.32 V

0.97 1.05 1.13 V

Voltage Error Amplifier (gmv)

Input Voltage Range 0 3 V

μ

V

= V

Transconductance

Feedback Reference Voltage

(High)

Feedback Reference Voltage

(Low)

Input Bias Current Note 2 -1.0 -0.05

Output High Voltage 5.8 6.0 V

Output Low Voltage 0.1 0.4 V

Sink Current VFB = 3V, VEAO = 1.5V -25 -18 -12

Source Current VFB = 1.5V, VEAO = 2.45V 8 15 25

Open Loop Gain DC gain 30 40 dB

Power Supply Rejection Ratio 11V < VCC < 16.5V 60 75 dB

Current Error Amplifier (gmi)

NONINV

SS < VREF and Veao > 2.5V

CM6802A/B

CM6802AH/BH

, VEAO = 2.25V @ T=25℃

INV

SS>VREF and Veao <

1.75V and Vrms < 2V

53 69 88

2.43 2.51 2.58 V

1.9 2 2.1 V

2.19 2.26 2.33 V

mho

μ

A

Input Voltage Range (Isense pin) -1.2 0.7 V

μ

V

= V

Transconductance

Input Offset Voltage VEAO=0V, IAC is open -10 50 mV

Output High Voltage 6.8 7.4 7.7 V

Output Low Voltage 0.1 0.4 V

NONINV

, IEAO = 1.5V @ T=25℃

INV

53 69 85

mho

2012/05/10

Rev. 1.5

Champion Microelectronic Corporation 5

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

ELECTRICAL CHARACTERISTICS:

(Conti.) Unless otherwise stated, these specifications apply Vcc=+14V, RT = 7.75 kΩ, CT = 1000pF, T

=Operating Temperature Range (Note 1)

A

CM6802A/B/AH/BH

Symbol Parameter Test Conditions

Min. Typ. Max.

Sink Current I

Source Current I

Open Loop Gain DC Gain 30 40 dB

Power Supply Rejection Ratio 11V < VCC < 16.5V 60 75 dB

PFC OVP Comparator

Threshold Voltage 2.70 2.85 3.0 V

= -0.5V, IEAO = 1.5V -42 -33 -30

SENSE

= +0.5V, IEAO = 4.0V 28 31 42

SENSE

Unit

μ

A

μ

Hysteresis 200 300 mV

PFC Green Power Detect Comparator

Veao Threshold Voltage 0.15 0.25 0.35 V

Tri-Fault Detect

Fault Detect HIGH 2.70 2.85 3.0 V

Time to Fault Detect HIGH VFB=V

Fault Detect LOW 0.4 0.5 0.6 V

PFC I

DC I

Comparator

LIMIT

Threshold Voltage -1.10 -1.00 -0.90 V

(PFCI

Output)

Delay to Output (Note 4) Overdrive Voltage = -100mV 700 ns

Comparator

LIMIT

– Gain Modulator

LIMIT

FAULT DETECT LOW

VFB=OPEN, 470pF from VFB to GND

to

2 4 ms

100 200 mV

Threshold Voltage 0.92 1.0 1.08 V

Delay to Output (Note 4) Overdrive Voltage = 100mV 700 ns

DC to DC PWM Brown Out Comparator

OK Threshold Voltage 2.20 2.36 2.52 V

Hysteresis 900 950 1000 mV

2012/05/10

Rev. 1.5

Champion Microelectronic Corporation 6

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

ELECTRICAL CHARACTERISTICS:

(Conti.) Unless otherwise stated, these specifications apply Vcc=+14V, RT = 7.75 kΩ, CT = 1000pF, T

=Operating Temperature Range (Note 1)

A

Symbol Parameter Test Conditions

GAIN Modulator

Gain1 (Note 3)

Gain2 (Note )3

Gain3 (Note 3)

Gain4 (Note 3)

Bandwidth (Note 4)

IAC = 20μA, V

T=25℃ SS<VREF IAC = 20μA, V

2.375V @ T=25℃ SS<VREF

= 20μA, V

I

AC

T=25℃ SS<VREF IAC = 20μA, V

@ T=25℃ SS<VREF

=1.125, VFB = 2.375V @

RMS

= 1.45588V, VFB=

RMS

=2.91V, VFB = 2.375V @

RMS

= 3.44V, VFB = 2.375V

RMS

= 40μA

I

AC

CM6802A/B/AH/BH

Min. Typ. Max.

4.5 5 6

4.2 4.65 5.1

1.45 1.75

1.0 1.45

1 MHz

Unit

Output Voltage = Rmul *

Oscillator (Measuring fpfc)

Initial fpfc Accuracy 1

Voltage Stability 11V < VCC < 16.5V 2 %

Temperature Stability 2 %

Total Variation Line, Temp 48 62 kHz

Ramp Valley to Peak Voltage VEAO=6V and IAC=20uA 2.5 V

PFC Dead Time (Note 4) 500 900 ns

CT Discharge Current V

Light Load Veao Threshold

(I

SENSE-IOFFSET

)

IAC = 50μA, V

SS<VREF

RT = 7.75 kΩ, CT = 1000pF, TA = 25℃

IAC=0uA

= 0V, V

RAMP2

= 1.125V, VFB = 2.0V

RMS

0.7 0.78 0.87 V

51 55.5 60 kHz

= 2.5V 10 11 12 mA

RAMP1

Light Load Threshold (High)

Light Load Threshold (Low)

Hysteresis 700 850 mV

Room Temperature=25℃

2.325 2.50 2.658 V

1.625 1.75 1.88 V

2012/05/10

Rev. 1.5

Champion Microelectronic Corporation 7

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

ELECTRICAL CHARACTERISTICS

(Conti.)

Temperature Range (Note 1)

Symbol Parameter Test Conditions

Reference

PFC

PWM

Soft Start

Unless otherwise stated, these specifications apply Vcc=+14V, RT = 7.75kΩ, CT = 1000pF, TA=Operating

CM6802A/B/AH/BH

Min. Typ. Max.

= 25℃, I(VREF) = 0mA

T

Output Voltage

Line Regulation

Load Regulation

A

11V < V

< 16.5V@ T=25℃

CC

VCC=10.5V,0mA < I(VREF) < 2mA; @ T=25℃

VCC=14V,0mA < I(VREF) < 3.5mA;

= -40℃~85℃

T

A

Temperature Stability 0.4 %

Total Variation Line, Load, Temp 7.2 7.8 V

T

= 125℃, 1000HRs

Long Term Stability

J

Minimum Duty Cycle IEAO > 4.5V 0 %

Maximum Duty Cycle V

Output Low Rdson

Output High Rdson

Rise/Fall Time (Note 4)

< 1.2V 95 97 %

IEAO

= -20mA @ T=25℃

I

OUT

I

= -100mA @ T=25℃

OUT

= 10mA, VCC = 9V @ T=25℃

I

OUT

I

= 20mA @ T=25℃

OUT

I

= 100mA @ T=25℃

OUT

C

= 100pF @ T=25℃

L

Duty Cycle Range 0-49.5 0-50 %

I

= -20mA @ T=25℃

Output Low Rdson

Output High Rdson

OUT

= -100mA @ T=25℃

I

OUT

I

= 10mA, VCC = 9V 0.5 1 V

OUT

= 20mA @ T=25℃

I

OUT

I

= 100mA @ T=25℃

OUT

Rise/Fall Time (Note 4) CL = 100pF 50 ns

PWM Comparator Level Shift 1.6 1.8 2 V

Soft Start Current

Room Temperature=25℃

7.3 7.5 7.7 V

3 5 mV

25 50 mV

5 25 mV

11.5 15 ohm

18 ohm

0.5 1 V

24 30 ohm

40 ohm

50 ns

11.5 15 ohm

18 ohm

26.5 40 ohm

40 ohm

7 8.5 10.5

Unit

A

μ

Supply

μ

Start-Up Current

V

= 12V, CL = 0 @ T=25℃

CC

50 65

A

Operating Current 14V, CL = 0 2.5 3.5 mA

Undervoltage Lockout Threshold CM6802A/B/AH/BH 12.35 12.85 13.45 V

Undervoltage Lockout Hysteresis CM6802A/B/AH/BH 2.8 2.95 3.1 V

Shunt Regulator (VCC zener)

Zener Threshold Voltage Apply VCC with Iop=20mA 16.2 16.8 17.4 V

Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst-case test conditions.

Note 2: Includes all bias currents to other circuits connected to the V

Note 3: Gain ~ K x 5.3V; K = (I

SENSE

– I

) x [IAC (VEAO – 0.7)]-1; VEAO

OFFSET

FB

pin.

MAX

= 6V

Note 4: Guaranteed by design, not 100% production test.

2012/05/10

Rev. 1.5

Champion Microelectronic Corporation 8