CM6565
Noise Free 16 pin Self-Start Interleaved PFC with
180 Degree Phase Shift CRM PFC Controller for 90+/85+
GENERAL DESCRIPTION
The CM6565 is the industry first 16 pin self-start interleaved
PFC with 180 degree phase shift CRM PFC controller for
total power supply system efficiency greater 90% or 85%.
The CM6565 is like a combination of
two 180 degree
phase shift CM6561s plus a lot of light load efficiency boost
functions. CM6565 gives the best noise free performance of
the offline power supply. The desired frequency range for
each PFC controller should be above 35KHz.
Mismatches
between
two
boost
converters
for
the
FEATURES
Patent
Filed
#5,565,761,
#5,747,977,
#5,742,151,
#5,804,950, #5,798,635, #6,091,233
Industry first interleaved PFC with 180 phase shift
CCM for EMI filter but CRM for PFC boost diodes
Due to ZCS and about ZVS, it is about noise free
Design for LCD TV or 90+ power supply
Critical Conduction Mode (CRM) = ZCS with about ZVS
Current input multiplier, IAC (Patented)
For 90+ system, an LLC or SRC should be the PWM
For 85+ system, an Dual Forward or a half bridge should be
the PWM
At light load, PFC bulk will drop ~ 40V at low line and Slave
PFC will be disabled (Patented)
PGB pin also can be used to turn on the CM6900/CM6901
which is LLC/SRC controller for 90+ applications
VRMS does not need high voltage resistor; IAC determines
VRMS1 and VRMS2
AC Brown out by comparing VRMS2 with 1.25V on and
1.0V off
No bleed resistor during the start up (Patented)
Can ON-OFF high voltage bipolar during the system start
up (Patented)
500mV Current Limit and about 130uS Current Loop Open
time out protection
Precision output over voltage protection comparator with
2.75V threshold which is 10% increased from 2.5V.
GM for Fast line and load transient response (Patented)
Soft Start pin at pin 6
Open control loop protection/Tri-Fault Detect Comparator
for UL1950 (Patented)
16.5V 50mA Shunt Regulator at VCC
Micro power start-up current (60uA Typ.)
Very low operating supply current (1.5mA Typ.)
Internal start up timer
1% precision 3mA Buffered 7.5V reference
Totem pole driver output current: 30ohm (VCC=15V)
sourcing current and 15 ohm (VCC=15V) sink current
16-Pin DIP/SOIC packages
interleaved PFC can be less than +/-5%.
Basically, it is like two 6561s work together with 180
degree phase shift plus light load improvements.
1. IAC (pin 1), Multiplier input pin: Current input instead of
Voltage input; it will enhance input current THD and the
system will be less sensitive to the noise. The system can
reduce one resistor between ground and IAC, multiplier
input pin.
2. IAC (pin 1), Multiplier input pin: During the start up
condition (the VCC is less than UVLO, 13V), IAC is
connected to VCC, and the RAC resistor (between VIN pin
and IAC pin) serves as a bleed resistor. Once the VCC is
greater than UVLO, then, RAC resistor provides the sine
wave current from VIN pin to IAC pin. After VCC is greater
than UVLO, the voltage of the IAC pin is around 1.4V.
Therefore, the RAC resistor can be served as a bleed
resistor.
Usually, the value of the RAC is from 4Mega to
10Meg ohm.
3. IAC (pin 1), Multiplier input pin: During the start up, if the
system turn-on time needs to be fast, an external high
voltage bipolar and a diode can be added for VCC during
the start-up, once VCC is greater than UVLO, 15V, IAC pin
will go low and turn off the high voltage bipolar.
4. For the fast load transient and line transient, a
transconductance error amplifier has been implemented
between the output pin VEAO and the input pin VFB to
replace the conventional OP.
Since transconductance
amplifier does not need the local feed back (OP needs the
local feedback); therefore, its VFB can fast and accurately
sense OVP condition not like traditional OP, operational
amplifier can not sense VFB for OVP.
2008/10/09 Rev1.0
Champion Microelectronic Corporation
Page 1
CM6565
Noise Free 16 pin Self-Start Interleaved PFC with
180 Degree Phase Shift CRM PFC Controller for 90+/85+
5.
Open
Control
Loop
protection/Tri-Fault
Detect
Comparator on VFB pin for easy passing the single fault
protection test of the UL1950 regulation.
The CM6565’s interleaved PFC has two PFC controllers,
Master PFC and Slave PFC. The Slave PFC is lagged ~
180 degree phase shift from the Master PFC. Both PFC
controllers consisted of ZCS plus about ZVS functions. It
provides the high efficient of power supply at both full load
and at light load. To input EMI filter, the currents are
overlapping and it looks like a CCM boost system with
double frequency. The ZCS plus about ZVS on feature
reduce the EMI noise further.
It has a superior performance multiplier making the device
capable of working in universal input voltage range
applications with an excellent THD.
The totem pole output stage is capable of driving a power
MOS or IGBT with +500mA source and -1A sink currents.
The device is operating in transition mode and it is
optimized for Electronic Lamp Ballast application, AC-DC
adaptors and SMPS.
APPLICATIONS
LCD TV
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-016 (P016)/SOP-016 (S08)
Top View
1
2
3
4
5
6
7
8
IAC
ZCDmaster
PG THL
Vrms1
Vrms2
SS
PGB
Isense Master
VEAO
VFB
Vref
VCC
PFCOUT(Mas)
PFCOUT(Sla)
GND
Isense Slave
16
15
14
13
12
11
10
9
2008/10/09 Rev1.0
Champion Microelectronic Corporation
Page 2
CM6565
Noise Free 16 pin Self-Start Interleaved PFC with
180 Degree Phase Shift CRM PFC Controller for 90+/85+
PIN DESCRIPTION
Pin No.
1
Symbol
IAC
Description
During Normal Operation:
Multiplier input, it provides the information of line input
voltage.
It only needs one resistor (RAC) connected between line input
and IAC pin. The value of RAC typically is between 4 Mega
ohm to 10 Mega ohm
1
IAC
During the System Start up:
RAC serves as a bleed resistor for VCC pin
2
ZCDmaster
Master PFC Zero current detection input. The threshold of the
pin is 80mV. When ZCDmaster is greater than ~ 80mV,
PFCOUT (master) may go high. When ZCDmaster is less
than ~ 80mV, PFCOUT (master) is low.
3
PG THL
PG THL is an input I/O. The user can program the Low
Threshold of the Power Good which can determine the
comparator output of PGB (open drain) to be pulled high.
4
Vrms1
AC Brown out input.
It mirrors the IAC (pin1) current to Vrm1 and Vrms1 uses it
with Rrms1 and Crms1 to generate the first pole; then it uses
the second RC pole to interface with Vrms2 (pin5). AC brown
out uses the Vrms1 to determine brown out point. Its
threshold is 3V with 1V hysteresis.
5
Vrms2
Gain Modulator/Multiplier Vrms input. The value of Vrms2
should be 50% of Vrms1 average value.
6
SS
PFC Soft Start pin: It supplies ~ 8uA to SS pin. It provides a
close-loop soft start function during power supply start up.
PFC Soft Start function can just need a simple capacitor to
ground and it can be around 1uF.
7
PGB
PGB is the PG comparator output. The input of PGB
comparator is using Vfb (pin 15) to compare with the high
threshold, 2.365V (preset internally) and the low threshold,
PGTHL (pin 3, Set by user).
When 380V is ready, pin 7 is open-drain and it will be pulled
low.
0
VCC
V
0
VCC
V
0
5
V
0
5
V
0.75
2.3
V
-0.3
0.7
V
0
VCC+1V
V
Min.
Operating Voltage
Typ.
Max.
1.4
Unit
V
2008/10/09 Rev1.0
Champion Microelectronic Corporation
Page 3
CM6565
Noise Free 16 pin Self-Start Interleaved PFC with
180 Degree Phase Shift CRM PFC Controller for 90+/85+
Pin No.
8
Symbol
Description
Min.
0
Operating Voltage
Typ.
Max.
2
Unit
V
Isense Master The Input pin of the Master PFCCMP which is current sense
comparator of the Master PFC control loop. The Power
MOSFET current is sensed by a resistor and the resulting
voltage needs to be filtered and it can be applied to this pin.
Its maximum threshold is about 500mV.
Its threshold is determined by the PFC multiplier output
current and it is a sine wave current.
Isense Master designed for cycle by cycle current shaping
and cycle by cycle current limit. It also determines when the
Isense Slave to turn off.
9
Isense Slave
The Input pin of the Slave PFCCMP which is current sense
comparator of the Slave PFC control loop. The Power
MOSFET current is sensed by a resistor and the resulting
voltage needs to be filtered and it can be applied to this pin.
Its maximum threshold is about 500mV.
Its threshold is determined by the PFC multiplier output
current and it is a sine wave current.
0
2
V
10
11
GND
PFCOUT
(Slave)
Ground
Slave PFC driver output; It can drive Power MOSFET and
IGBT with 30 ohm pulled up and 15 ohm pulled down.
Master PFC driver output; It can drive Power MOSFET and
IGBT with 30 ohm pulled up and 15 ohm pulled down.
Supply voltage:
It has a 50mA 16.5V shunt regulator.
10
15
18
V
0
VCC
V
0
VCC
V
12
PFCOUT
(Master)
13
VCC
14
Vref
1% Precision 7.5V Reference Pin and it sources maximum 3
mA
7.5
V
15
V
FB
PFC transconductance voltage error amplifier input; it also
senses PFCOVP when VFB is greater than 2.75V and it also
turns off PFC when VFB is less than 0.5V. It is also the
Tri-Fault Protection input.
0
2.5
3
V
16
VEAO
PFC transconductance voltage error amplifier output;
Low Power Detect Comparator input
0
6
V
2008/10/09 Rev1.0
Champion Microelectronic Corporation
Page 4
CM6565
Noise Free 16 pin Self-Start Interleaved PFC with
180 Degree Phase Shift CRM PFC Controller for 90+/85+
BLOCK DIAGRAM
VFB
15
VEAO
16
VRMS1
4
VRMS2
5
IAC
1
ZCDMASTER
2
ISENSE MASTER
8
ISENSE SLAVE
9
U8_SW
VCC
IAC
U16_VEAO
VFB
VREFOK UVLOB
VEAO
U5_ZCDCMP
MULO
+
SS 6
ISOFT
2.5V
2.25V
2V
-
+
+
+
+
+
VEAO
.
VRMS1
VRMS2
MULOUT
PFCMASTEROFFB
PFCSLAVEOFFB
MASTERCLUB
LITCHB
ISENSESLAVE
ISENSEMASTER
ZCDMASTER
GND
-
+
-
-
+
U3_SRLATCH2
SB1
Q
SB2
U1_DRIVER
12 PFC MASTER OUT
1V
ISENS MASTER
ISENSE SLAVE
-
+
+
RB1
QB
RB2
U12_SOFTPFC
VEAO
VDCOKB
SOFTPFC
VEAO
VFB
-
-
U9_BLOCKWIRE
BLOCKWIRE
.
.
+
0.5V
BLOCKWIREB
U14_DCOKCMP
VFB
+
-
-
.
.
U4_SRLATCH2
DCOK
DCOKB
U2_DRIVER
11 PFC SLAVE OUT
U10_VINOKCMP
VRMS2
+
SB1
Q
PG THL 3
2.5V
VINOK
.
.
U6_AND4
SB2
RB1
QB
RB2
3V
2V
PGB
7
MN1
-
-
VINOKB
U7_SYNC
U11_PFCOVPCMP
VFB
+
SYNCONB
MASTERON
SYNCOFFB
TOOLONGB
UVLOB
VREFOK
PFCOVPCMP
.
.
SLAVEON
GND
VCC 13
2.75V
2.5V
D1_ZENER
GND
-
-
PFCOVPCMPB
VREF
10
GND
14
VREF
ORDERING INFORMATION
Part Number
CM6565GIP
CM6565GIS
Temperature Range
-40℃ to 125℃
-40℃ to 125℃
Package
16-Pin PDIP (P016)
16-Pin SOP (S016)
Note:
1.G : Suffix for Pb Free Product
2.Initial Accuracy : T
A
=25℃
2008/10/09 Rev1.0
Champion Microelectronic Corporation
Page 5
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