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PDF CM6501 Data sheet ( Hoja de datos )
| Número de pieza | CM6501 | |
| Descripción | (CM6500 / CM6501) Single PFC Controller | |
| Fabricantes | Champion | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CM6501 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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CM6500/1
SINGLE PFC CONTROLLER W/ INRUSH CURRENT CONTROL & SEPARATED PFCOVP
GENERAL DESCRIPTION
FEATURES
The CM6500/1 is a single Power Factor Controller for
offline switched mode power suppliers. The power supply of
CM6500/01 allows the use of smaller, lower cost bulk
capacitors, reduces power line loading and stress on the
switching FETs, and results in a power supply that fully
compiles with IEC-1000-2-3 specifications. CM6500/1
includes circuits for the implementation of leading edge,
average current, “boost” type power factor correction and a
synchronized 47% PWM clock. The CM6500/1 has
additional features besides all the features of CM6800.
Additional features are Inrush Current Control, Separated
PFC OVP pin, Separated Power VCC pin and Analog VCC
pin, and Separated Power Ground pin and Analog Ground
pin. Gate-driver with 1A capabilities minimizes the need for
external driver circuits. Low power requirements improve
efficiency and reduce component costs.
An over-voltage comparator shuts down the PFC section in
the event of a sudden decrease in load. The PFC section
also includes peak current limiting and input voltage
brownout protection. The synchronized 47% PWM clock
can on/off down stream DC to DC PWM stages, and PFC
section can have the best timing switching with the down
stream DC to DC PWM stages.
! Inrush Current Control
! Separated PFC OVP pin
! Separated Power Ground and Analog Ground
! PWMSDB to turn off PWMCLK without disturbing PFC
section
! 23V Bi-CMOS process
! VIN OK guaranteed turn on PWM Clock at 2.5V instead of
1.5V
! Internally synchronized leading edge PFC and trailing edge
PWM Clock in one IC
! Slew rate enhanced transconductance error amplifier for
ultra-fast PFC response
! Low start-up current (100µA typ.)
! Low operating current (3.0mA type.)
! Low total harmonic distortion, high PF
! Reduces ripple current in the storage capacitor between the
PFC and PWM sections
! Average current, continuous or discontinuous boost leading
edge PFC
! VCC OVP Comparator
! Low Power Detect Comparator
! PWM configurable for current mode or voltage mode
operation
! Current fed gain modulator for improved noise immunity
! Brown-out control, over-voltage protection, UVLO, and soft
start, and Reference OK
24 Hours Technical Support---WebSIM
Champion provides customers an online circuit simulation tool
called WebSIM. You could simply logon our website at
www.champion-micro.com for details.
2002/05/30 Preliminary
Champion Microelectronic Corporation
Page 1
1 page  
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CM6500/1
SINGLE PFC CONTROLLER W/ INRUSH CURRENT CONTROL & SEPARATED PFCOVP
ELECTRICAL CHARACTERISTICS (Conti.) Unless otherwise stated, these specifications apply
VCC=+15V, RT = 52.3kΩ, CT = 470pF, TA=Operating Temperature Range (Note 1)
Symbol
Parameter
Threshold Voltage
Hysteresis
Threshold Voltage
Threshold Voltage
Hysteresis
Threshold Voltage
(PFC ILIMIT VTH – Gain Modulator
Output)
Delay to Output (Note 4)
Threshold Voltage
Delay to Output (Note 4)
Threshold Voltage
Hysteresis
Initial Accuracy
Voltage Stability
Temperature Stability
Total Variation
Ramp Valley to Peak Voltage
PFC Dead Time (Note 4)
CT Discharge Current
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Variation
Long Term Stability
Test Conditions
PFC OVP Comparator
Low Power Detect Comparator
VCC OVP Comparator
PFC ILIMIT Comparator
CM6500/1
Min.
Typ.
Max.
2.70 2.75 2.85
250 290
0.45 0.5 0.55
19 19.4 20
1.40 1.5 1.65
-1.08 -1 -0.93
100 200
Overdrive Voltage = -100mV
DC ILIMIT Comparator
Overdrive Voltage = 100mV
VIN OK Comparator
Oscillator
TA = 25℃
11V < VCC < 16.5V
0.95
2.35
0.8
71
Line, Temp
68
VRAMP2 = 0V, VRAMP1 = 2.5V
Reference
TA = 25℃, I(VREF) = 1mA
11V < VCC < 16.5V
0mA < I(VREF) < 7mA; TA = 0℃~70℃
0mA < I(VREF) < 5mA; TA = -40℃~85℃
500
5.0
7.4
Line, Load, Temp
TJ = 125℃, 1000HRs
7.35
5
250
1.0
250
2.45
1.0
76
1
2
2.5
7.5
10
10
10
0.4
1.05
2.55
1.2
81
84
700
10.0
7.6
25
20
20
7.65
25
Unit
V
mV
V
V
V
V
mV
ns
V
ns
V
V
kHz
%
%
kHz
V
ns
mA
V
mV
mV
mV
%
V
mV
2002/05/30 Preliminary
Champion Microelectronic Corporation
Page 5
5 Page 
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CM6500/1
SINGLE PFC CONTROLLER W/ INRUSH CURRENT CONTROL & SEPARATED PFCOVP
ZCI: Compensation Net Work for the Current Loop
GMI: Transconductance of IEAO
VOUTDC: PFC Boost Output Voltage; typical designed value
is 380V and we use the worst condition to calculate the ZCI
RS: The Sensing Resistor of the Boost Converter
2.5V: The Amplitude of the PFC Leading Modulation Ramp
L: The Boost Inductor
There is a modest degree of gain contouring applied to the
transfer characteristic of the current error amplifier, to
increase its speed of response to current-loop
perturbations. However, the boost inductor will usually be
the dominant factor in overall current loop response.
Therefore, this contouring is significantly less marked than
that of the voltage error amplifier. This is illustrated in the
Typical Performance Characteristics.
ISENSE Filter, the RC filter between RS and ISENSE :
There are 2 purposes to add a filter at ISENSE pin:
1.) Protection: During start up or inrush current
conditions, it will have a large voltage cross Rs
which is the sensing resistor of the PFC boost
converter. It requires the ISENSE Filter to attenuate
the energy.
2.) To reduce L, the Boost Inductor: The ISENSE Filter
also can reduce the Boost Inductor value since the
ISENSE Filter behaves like an integrator before going
ISENSE which is the input of the current error
amplifier, IEAO.
The ISENSE Filter is a RC filter. The resistor value of the ISENSE
Filter is between 100 ohm and 50 ohm because IOFFSET x the
resistor can generate an offset voltage of IEAO. By selecting
RFILTER equal to 50 ohm will keep the offset of the IEAO less
than 5mV. Usually, we design the pole of ISENSE Filter at
fpfc/6, one sixth of the PFC switching frequency. Therefore,
the boost inductor can be reduced 6 times without disturbing
the stability. Therefore, the capacitor of the ISENSE Filter,
CFILTER, will be around 283nF.
2002/05/30 Preliminary
Champion Microelectronic Corporation
Page 11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet CM6501.PDF ] | |
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