CM6803 Datasheet PDF - Champion

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CM6803
Champion

Part Number CM6803
Description 8-PIN GREEN MODE PFC/PWM CONTROLLER COMBO
Page 17 Pages


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CM6803(A;B;C)
10-PIN Green-Mode PFC/PWM Combo CONTROLLER for LCD Standby Power
GENERAL DESCRIPTION
FEATURES
The CM6803A is the Green-Mode PFC/PWM Combo ‹
controller for Standby in LCD power. For the LCD power
supply, its input current shaping PFC performance could be ‹
very close to the performance of the CM6800 or ML4800
leading edge modulation average current topology.
‹
‹
CM6803A 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 CM6803A /
CM6808A includes circuits for the implementation of a ‹
leading edge, input current shaping technique “boost” type ‹
PFC and a trailing edge, PWM.
‹
‹
The CM6803A’s PFC and PWM operate at the same
frequency, 67.5kHz. A 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.
‹
The PWM has the Green Mode Functions.
‹
PWM Green Mode will happen when the PWMCMP (PWM
Comparator) Duty Cycle is less than ~ 6%, in the next ‹
cycle, the PWMOUT pulse will be removed until PWMCMP
Duty Cycle is greater than 6%, then the next cycle, ‹
PWMOUT pulse appears.
PFC has a smart I/O pin which can sense the remote on/off
signal and generate a high level voltage to turn on the ‹
DC-DC stage.
‹
‹
‹
‹
‹
‹
Patent Filed #5,565,761, #5,747,977, #5,742,151,
#5,804,950, #5,798,635
The PWM has the Green Mode to meet blue angel and
energy star spec.
10-Pin SOIC package
PWM pulse skipping for the green mode
Use RAC as the Startup resistor which can be > 2000K or
higher at IAC pin
It can use the HV bipolar to start up the chip and it helps
green mode.
Easy to configure into Boost Follower
Enable lowest BOM for power supply with PFC
Internally synchronized PFC and PWM in one IC
Patented slew rate enhanced voltage error amplifier with
advanced input current shaping technique
Universal Line Input Voltage
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, VCCOVP, Precision -1V PFC ILIMIT, PFC
Tri-Fault Detect comparator to meet UL1950
Low supply currents; start-up: 100uA typical, operating
current: 2mA typical.
Synchronized leading PFC and trailing edge modulation
PWM to reduce ripple current in the storage capacitor
between the PFC and PWM sections and to reduce
switching noise in the system
High efficiency trailing-edge current mode PWM
Exact 50% PWM maximum duty cycle
UVLO, REFOK, and brownout protection
Digital PFC and PWM soft start, ~10mS
Precision PWM 1.5V current limit for current mode
operation
Smart I/O to sense remote on/off signal and Turn on PFC
stage
Smart I/O also can be generated a high level voltage for the
next power stage turn on signal.
2006/10/17 Rev1.0
Champion Microelectronic Corporation
Page 1



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APPLICATIONS
‹ LCD Standby Power
CM6803(A;B;C)
10-PIN Green-Mode PFC/PWM Combo CONTROLLER for LCD Standby Power
PIN CONFIGURATION
10 Pin SSOP (R10)
Top View
1
GND
PWM OUT
10
2 IAC PFC OUT
9
3
ISENSE
VCC
8
4
VEAO
Smart I/O
7
5 VFB
V+I
6
PIN DESCRIPTION
Pin No. Symbol
1 GND Ground
Description
Operating Voltage
Min.
Typ. Max. Unit
Feedforward input to do slope compensation and to start up
2 IAC the system. During the start up, IAC is connected to VCC until 0
VCC is greater than 13V.
1V
3 ISENSE Current sense input to the PFC current limit comparator
4 VEAO PFC transconductance voltage error amplifier output
-5
0
5 VFB PFC transconductance voltage error amplifier input
0
6 V + I PWM current limit comparator input
0
It can sense a signal above 0.5V to turn on the PFC then to
7 Smart I/O
0
provide a high level signal about 2.6V output signal
8 VCC Positive supply
10
9 PFC OUT PFC driver output
10 PWM OUT PWM driver output
0
0
0.7 V
6V
2.5 3 V
1.5 V
VCC V
18 V
VCC
VCC
V
V
ORDERING INFORMATION
Part Number
Operation Frequency
CM6803A/AG*
Fpwm = Fpfc = 67.5Khz
Initial Accuracy (KHz)
Min Typ Max
60 67 74
Temperature Range
-40to 125
Package
10 Pin SSOP(R10)
Note:
1.G : Suffix for Pb Free Product
2.Initial Accuracy : TA=25
2006/10/17 Rev1.0
Champion Microelectronic Corporation
Page 2



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BLOCK DIAGRAM
CM6803(A;B;C)
10-PIN Green-Mode PFC/PWM Combo CONTROLLER for LCD Standby Power
ISENSE
3
VFB
5
. R1A
12
. R1B
12
IAC 2
2IAC
R1C
.
1
.
. VCC
UVB
4
.VEAO
- GMV
.
2.5V
+
V To Ramp
..
17.9V
16.4V
VCC OVP
+
.
-
-
0.5V
2.75V
2.5V
- BROKENWIRE
.
+
PFC OVP
+
.
-
-
- PFC ILIMIT
.
-1V +
PFC CMP
-
.
+
FAULT
SQ
R
RQ
PFCCLK
PWMCLK
UVLO
PFC CLK
.
. PWM CLK
VCC
.
fpfc=70KHz
.
UVB
VREFDK
VFB
2.45V
0.75V
VIN-OK
+
.
-
-
SQ
R1
R2 Q
UVB
VREFDK
Smart I/O
7
2
12k
.
1
.
2
2k.
1
0.5V
GREENMODE
GND
PROTECTED BY PATENT
GND
PWMCLK
PWMFAULT
10mS
1.5V
..
SS
SOFT START
6
V+I
PWM CMP
-
-
.
+
8
VCC
9
PFCOUT
10
PWMOUT
1
GND
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are those values beyond which the device could be permanently damaged.
VCC MAX
IAC (after start up)
Parameter
ISENSE Voltage
PFC OUT
PWM OUT
VEAO
Smart I/O
Voltage on Any Other Pin
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)
Min.
GND-0.3
-5
GND – 0.3
GND – 0.3
0
GND – 0.3
GND-0.3
-65
-40
Max.
20
1.0
0.7
VCC + 0.3
VCC + 0.3
6.3
VCC + 0.3
VCC + 0.3
0.5
0.5
1.5
150
150
125
260
80
Units
V
V
V
V
V
V
V
V
A
A
μJ
/W
2006/10/17 Rev1.0
Champion Microelectronic Corporation
Page 3



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CM6803(A;B;C)
10-PIN Green-Mode PFC/PWM Combo CONTROLLER for LCD Standby Power
ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply Vcc=+14V,
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 Impedance
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
IAC
ISENSE = 0V, TA=25
CM6803A
Min.
Typ.
Max.
Unit
0 5V
30 65 90 μmho
2.43 2.5 2.56
V
-0.5 -1.0
μA
5.8 6.0
V
0.1 0.4
V
-35 -20 μA
30 40
μA
50 60
dB
50 60
dB
35 40 45 K
Threshold Voltage
Hysteresis
VCC OVP Comparator
17.3 17.9 18.5
1.3 1.5 1.75
V
V
Threshold Voltage
Hysteresis
PFC OVP Comparator
2.64 2.77 2.85
V
230 300 mV
Threshold Voltage
Delay to Output
PFC ILIMIT Comparator
-1.1 -1 -0.9
150 300
V
ns
Threshold Voltage
Hysteresis
VIN OK Comparator
2.30 2.45 2.55
1.65 1.75 1.85
V
V
Digital Soft Start Timer (Note 2)
PWM Digital Soft Start
Right After Start Up
10 ms
Threshold Voltage
V + I Comparator
Normal operation without soft start 1.38 1.5 1.62
V
Delay to Output (Note 2)
150 300 Ns
Threshold Voltage
During soft start condition
100 150 200 mV
Fault Detect HIGH
Time to Fault Detect HIGH
Fault Detect LOW
PFC Tri-Fault Detect Comparator
VFB=VFAULT DETECT LOW to VFB = OPEN,
470pF from VFB to GND
2.70
0.4
2.77
2
0.5
2.85
4
0.6
V
ms
V
PFCout turn on
Smart Detect Comparator
Sweep Smart I/O
0.5V
V
Output a trigger signal
Measure Smart I/O
2.6 V
2006/10/17 Rev1.0
Champion Microelectronic Corporation
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