|
|
PDF CM6903B Data sheet ( Hoja de datos )
| Número de pieza | CM6903B | |
| Descripción | Low Pin Count PFC/PWM CONTROLLER COMBO | |
| Fabricantes | Champion Microelectronic | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de CM6903B (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
|
No Preview Available !
GENERAL DESCRIPTION
CM6903B
Low Pin Count PFC/PWM CONTROLLER COMBO
FEATURES
The CM6903B is a space-saving PFC-PWM controller for Patent Number #5,565,761, #5,747,977, #5,742,151,
power factor corrected, switched mode power supplies that
#5,804,950, #5,798,635
offers very low start-up and operating currents. For the Pin to pin compatible with FAN6903/4
power supply less than 500Watt, its input current shaping Enable lowest BOM for power supply with PFC
PFC performance could be very close to CM6800 or Internally synchronized PFC and PWM in one IC
ML4800 architecture.
Patented slew rate enhanced voltage error amplifier with
advanced input current shaping technique
Power Factor Correction (PFC) offers the use of smaller, Universal Line Input Voltage
lower cost bulk capacitors, reduces power line loading and CCM boost or DCM boost with leading edge modulation
stress on the switching FETs, and results in a power supply
PFC using Input Current Shaping Technique
fully compliant to IEC1000-3-2 specifications. The Feedforward IAC pin to do the automatic slope
CM6903B includes circuits for the implementation of a
compensation
leading edge, input current shaping technique “boost” type PFCOVP, PFC VCCOVP, Precision -1V PFC ILIMIT,
PFC and a trailing edge, PWM.
Tri-Fault Detect comparator to meet UL1950
No bleed resistor required
The CM6903B’s PFC and PWM operate at the same Low supply currents; start-up: 100uA typical, operating
frequency, 67.5kHz. This higher frequency allows the user
current: 2mA typical.
to design with smaller PWM components while maintaining Synchronized leading PFC and trailing edge modulation
the optimum operating frequency for the PFC. An PFC OVP
PWM to reduce ripple current in the storage capacitor
comparator shuts down the PFC section in the event of a
between the PFC and PWM sections and to reduce
sudden decrease in load. The PFC section also includes
switching noise in the system
peak current limiting for enhanced system reliability.
VINOK Comparator to guarantee to enable PWM when
PFC reach steady state
High efficiency trailing-edge current mode PWM
UVLO, REFOK, and brownout protection
Digital PWM softstart: CM6903B (10ms)
Precision PWM 1.5V current limit for current mode
operation
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.
APPLICATIONS
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
SIP-09 (Z09)
Front View
2007/04/13 Rev1.0
Champion Microelectronic Corporation
Page 1
1 page  
CM6903B
Low Pin Count PFC/PWM CONTROLLER COMBO
ELECTRICAL CHARACTERISTICS (Conti.) Unless otherwise stated, these specifications apply
Vcc=+15V, RT = 52.3kΩ, CT = 470pF, TA=Operating Temperature Range (Note 1)
Symbol
Parameter
Test Conditions
CM6903B
Min.
Typ.
PWM
Duty Cycle Range
CM6903B
0-49.5
Output Low Impedance
15
Output Low Voltage
Output High Impendence
IOUT = -100mA
IOUT = -10mA, VCC = 8V
0.8
0.7
30
Output High Voltage
IOUT = 100mA, VCC = 15V
13.5 14.2
Rise/Fall Time (Note 2)
CL = 1000pF
Supply
50
Start-Up Current
VCC = 11V, CL = 0
100
Operating Current
Undervoltage Lockout Threshold
VCC = 15V, CL = 0
12.70
2.5
13.0
Undervoltage Lockout Hysteresis
2.85 3.0
Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst-case test conditions.
Note 2: Guaranteed by design, not 100% production test.
Max.
0-50
22.5
1.5
1.5
45
150
4.0
13.30
3.15
Unit
%
ohm
V
V
ohm
V
ns
uA
mA
V
V
TYPICAL PERFORMANCE CHARACTERISTIC
127
120
113
106
99
92
85
78
71
64
57
2
2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9
VFB (V)
3
Voltage Error Amplifier (gmv) Transconductance
2007/04/13 Rev1.0
Champion Microelectronic Corporation
Page 5
5 Page 
CM6903B
Low Pin Count PFC/PWM CONTROLLER COMBO
UVLO
The UVLO threshold is 13V providing 3V hysteresis.
PFCOUT and PWMOUT
Both PFCOUT and PWMOUT are CMOS drivers. They both
have adaptive anti-shoot through to reduce the switching
loss. Its pull-up is a 30ohm PMOS driver and its pull-down
is a 15ohm NMOS driver. It can source 0.5A and sink 1A if
the VCC is above 13V.
PWM Section
After 10mS digital soft start, CM6903B’s PWM is operating
as a typical current mode. It requires a secondary
feedback, typically, it is configured with CM431, and photo
couple.
Since PWM Section is different from CM6800 family, it
needs the emitter of the photo couple to connected with
DCILIMIT instead of the collector. The PWM current
information also goes into DCILIMIT. Usually, the PWM
current information requires a RC filter before goes into the
DCILIMIT.
Therefore, DCILIMIT actually is a summing node from
voltage information which is from photo couple and CM431
and current information which is from one end of PWM
sensing resistor and the signal goes through a single pole,
RC filter then enter the DCILIMIT pin.
This RC filter at DCILMIT also serves several functions:
1.) It protects IC.
2.) It provides level shift for voltage information.
3.) It filters the switching noise from current information.
The pole location of the RC filter should be greater than one
sixth of the PWM switching frequency which is 67Khz for
CM6903B and which is 134Khz for CM6903B. Since the
typical photo couple should be biased around 1mA, the
resistor of the RC filter should be around 1.5V/1mA~1.5K
ohm and we suggest R is 1K ohm. Therefore, for
CM6903B, C should be around 14nF.
The maximum input voltage of the DCILIMIT pin is 1.5V.
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. Double the power can be delivered from a
220V AC line versus a 110V AC line. Since this is a
combination PFC/PWM, the power to the load is limited by
the PWM stage.
2007/04/13 Rev1.0
Champion Microelectronic Corporation
Page 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet CM6903B.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| CM6903 | Low Pin Count PFC/PWM Controller Combo |  ETC |
| CM6903 | Low Pin Count PFC/PWM Controller Combo | Champion Microelectronic |
| CM6903A | Low Pin Count PFC/PWM CONTROLLER COMBO | Champion Microelectronic |
| CM6903B | Low Pin Count PFC/PWM CONTROLLER COMBO | Champion Microelectronic |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |