CM6807CGR Champion Microelectronic, CM6807CGR Datasheet

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CM6807CGR

Manufacturer Part Number
CM6807CGR
Description
10-pin Green-mode Pfc/pwm Combo Controller for High Density AC Adapter
Manufacturer
Champion Microelectronic
Datasheet
1.CM6807CGR.pdf (16 pages)
GENERAL DESCRIPTION
The CM6807A is the Green-Mode PFC/PWM Combo
controller for High Density AC Adapter. For the power
supply less than 200Watt, it’s input current shaping PFC
performance could be very close to the performance of the
CM6800 or ML4800 leading edge modulation average
current topology.
CM6807A 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 CM6807A
includes circuits for the implementation of a leading edge,
input current shaping technique “boost” type PFC and a
trailing edge, PWM.
The CM6807A’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.
Both PFC and PWM have the Green Mode Functions.
When the load is below GMth, Green Mode Threshold,
PFCOUT is turned off. The GMth can be programmed by
the designer. 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.
PWM has a PWMtrifault pin which can sense the PWM
short and determine the GMth to turn off PFC.
2006/10/11 Rev1.0
10-PIN Green-Mode PFC/PWM Combo CONTROLLER for High Density AC Adapte
Champion Microelectronic Corporation
FEATURES
Patent Filed #5,565,761, #5,747,977, #5,742,151,
#5,804,950, #5,798,635
Both PFC and PWM have 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
VINOK Comparator to guarantee to enable PWM when
PFC reach steady state
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
PWMtrifault to sense DC to DC short and Turn off PFC at
GMth
PWMtrifault also can be programmed to do the Thermal
Protection
CM6807(A;B;C)
Page 1
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CM6807CGR Summary of contents

Page 1

... UVLO, REFOK, and brownout protection Digital PFC and PWM soft start, ~10mS Precision PWM 1.5V current limit for current mode operation PWMtrifault to sense short and Turn off PFC at GMth PWMtrifault also can be programmed to do the Thermal Protection Champion Microelectronic Corporation CM6807(A;B;C) r Page 1 ...

Page 2

... Description Initial Accuracy (KHz) Min Typ Max 100 110 121 135 149 Champion Microelectronic Corporation CM6807(A;B;C) 10 Pin SSOP (R10) Top View PWM OUT GND IAC PFC OUT VCC ISENSE VEAO PWMTRIFAULT VFB Operating Voltage Min. Typ. Max. ...

Page 3

... Green-Mode PFC/PWM Combo CONTROLLER for High Density AC Adapte 4 .VEAO PFC CMP - . + V To Ramp . . PFCCLK PWMCLK VFB + 2.45V - - 0.75V PWMFAULT 10mS GND 1.5V PWMCLK . . SS SOFT START 6 V+I Champion Microelectronic Corporation CM6807(A;B; UVB VREFDK FAULT UVLO VCC . . PFC CLK . . PWM CLK fpfc=70KHz VIN- UVB R2 Q VREFDK PWM CMP ...

Page 4

... Comparator Normal operation without soft start During soft start condition PFC Tri-Fault Detect Comparator FAULT DETECT LOW 470pF from V to GND FB PWM Tri-Fault Detect Comparator Sweep PWMtrifault Sweep PWMtrifault Champion Microelectronic Corporation CM6807(A;B;C) CM6807A Min. Typ 2.43 2.5 -0.5 5.8 6.0 ...

Page 5

... -100mA OUT I = -10mA, V OUT I = 100mA, V OUT C = 1000pF L PWM -100mA OUT I = -10mA, V OUT I = 100mA, V OUT C = 1000pF L Supply V = 11V 15V Champion Microelectronic Corporation CM6807(A;B;C) CM6807A Min. Typ 0.3 0. SENSE = SENSE 15V 13.5 14 0- 15V 13 ...

Page 6

... TYPICAL PERFORMANCE CHARACTERISTIC 127 120 113 106 2006/10/11 Rev1.0 10-PIN Green-Mode PFC/PWM Combo CONTROLLER for High Density AC Adapte 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 VFB (V) Voltage Error Amplifier (g ) Transconductance mv Champion Microelectronic Corporation CM6807(A;B; Page 6 ...

Page 7

... Amplifier input. Soft Start can be triggered by the following conditions: During the startup (VCC is less than 10V) 1 short (PWMtrifault is greater thanVCC-0.7V) 2.) Champion Microelectronic Corporation CM6807(A;B;C) current; therefore, the system does not requires additional bleed resistor to start up the chip. slope compensation ...

Page 8

... A commonly used value is 385VFB, to allow for a high line of 270VAC current that the converter is allowed to draw from the line at any given instant must be proportional to the line voltage. Champion Microelectronic Corporation CM6807(A;B; The other condition is that the rms ...

Page 9

... ON. The effective duty-cycle of the leading edge modulation is determined during OFF time of the switch. Figure 3 shows a leading edge control scheme. (4) (5) (6) Champion Microelectronic Corporation CM6807(A;B;C) × × = × ...

Page 10

... Protection: During start up or inrush current 2.) Reduce L, the Boost Inductor: The ISENSE Filter * Champion Microelectronic Corporation CM6807(A;B;C) : PFC Boost Output Voltage; typical designed value is : This is the necessary change of the VEAO to deliver conditions, it will have a large voltage cross Rs, which is the sensing resistor of the PFC boost converter ...

Page 11

... Given that 16V on VCC corresponds to 380V on the PFC output, 17.9V on VCC corresponds to an OVP level of 460V necessary to put RC filter between bootstrap winding and VCC. For VCC=15V sufficient to drive either a power MOSFET or a IGBT. Champion Microelectronic Corporation CM6807(A;B;C) power supply reliability, reduce ...

Page 12

... Component Reduction Components associated with the VRMS and IEAO pins of a typical PFC controller such as the CM6800 have been eliminated. The PFC power limit and bandwidth does vary with line voltage. noise from current Champion Microelectronic Corporation CM6807(A;B;C) r Page 12 ...

Page 13

... Rev1.0 10-PIN Green-Mode PFC/PWM Combo CONTROLLER for High Density AC Adapte Champion Microelectronic Corporation CM6807(A;B;C) r Page 13 ...

Page 14

... C17 Q14 R33 ZD4 100uF NC Z.D 27V NC 2 C32 R54 NC NC ZD5 R35 R34 C19 Z.D 15V 220K 1M 105PF V+I Champion Microelectronic Corporation CM6807(A;B;C) D16(20A/150V) DIODE SCHOTTKY 1 2 ER39/PC40 3 TA1 4 7 D15(20A/150V) R8 DIODE SCHOTTKY 16T 6T 47K 1000PF 3 R48 47K 3 FLY2 16T ...

Page 15

... G : Suffix for Pb Free Product X : Suffix for Temperature Range (note Suffix for Package Type (note 4) note -40 ℃ ~+125 ℃ note 4: R: SSOP-10 2006/10/11 Rev1.0 10-PIN Green-Mode PFC/PWM Combo CONTROLLER for High Density AC Adapte 10 Pin-SSOP (R10) θ Champion Microelectronic Corporation CM6807(A;B;C) r Page 15 ...

Page 16

... Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. ...

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