CM6800 Datasheet PDF - Champion Microelectronic
Part Number | CM6800 | |
Description | LOW START UP CURRENT PFC/PWM CONTROLLER COMBO | |
Manufacturers | Champion Microelectronic | |
Logo | ||
There is a preview and CM6800 download ( pdf file ) link at the bottom of this page. Total 18 Pages |
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LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
GENERAL DESCRIPTION
FEATURES
The CM6800 is a controller for power factor corrected,
switched mode power suppliers. Power Factor Correction
(PFC) 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-1000-3-2 specifications. Intended as a
BiCMOS version of the industry-standard ML4824,
CM6800 includes circuits for the implementation of leading
edge, average current, “boost” type power factor
correction and a trailing edge, pulse width modulator
(PWM). 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 PWM section can be
operated in current or voltage mode, at up to 250kHz, and
includes an accurate 50% duty cycle limit to prevent
transformer saturation.
CM6800 includes an additional folded-back current limit
for PWM section to provide short circuit protection
function.
Patent Number #5,565,761, #5,747,977, #5,742,151,
#5,804,950, #5,798,635
Pin to pin compatible with ML4800 and FAN4800
Additional folded-back current limit for PWM section.
23V Bi-CMOS process
VIN OK turn on PWM at 2.5V instead of 1.5V
Internally synchronized leading edge PFC and trailing
edge PWM in one IC
Slew rate enhanced transconductance error amplifier for
ultra-fast PFC response
Low start-up current (100 μ A 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
APPLICATIONS
Desktop PC Power Supply
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
SOP-16 (S16) / PDIP-16 (P16)
Top View
1
IEAO
VEAO
16
2 IAC
VFB 15
3
ISENSE
VREF
14
4
VRMS
VCC
13
5
SS PFC OUT
12
6
VDC
PWM OUT
11
7
RAMP1
GND
10
8
RAMP2
DC ILIMIT
9
2008/10/23 Rev. 2.1
Champion Microelectronic Corporation
Page 1
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CM6800
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
ELECTRICAL CHARACTERISTICS (Conti.) Unless otherwise stated, these specifications apply
Vcc=+15V, RT = 30.16kΩ, CT =1000pF, TA=Operating Temperature Range (Note 1)
Symbol
Parameter
Test Conditions
Sink Current
Source Current
Open Loop Gain
Power Supply Rejection Ratio
Threshold Voltage
Hysteresis
Threshold Voltage
Threshold Voltage
Hysteresis
Fault Detect HIGH
Time to Fault Detect HIGH
Fault Detect LOW
Threshold Voltage
(PFC ILIMIT VTH – Gain Modulator
Output)
Delay to Output (Note 4)
Threshold Voltage
Delay to Output (Note 4)
OK Threshold Voltage
Hysteresis
Gain (Note 3)
Bandwidth
Output Voltage =
3.5K*(ISENSE-IOFFSET)
ISENSE = +0.5V, IEAO = 4.0V
ISENSE = -0.5V, IEAO = 1.5V
11V < VCC < 16.5V
PFC OVP Comparator
Low Power Detect Comparator
VCC OVP Comparator
Tri-Fault Detect
VFB=VFAULT DETECT LOW to
VFB=OPEN.470pF from VFB to GND
PFC ILIMIT Comparator
Overdrive Voltage = -100mV
DC ILIMIT Comparator
Overdrive Voltage = 100mV
VIN OK Comparator
GAIN Modulator
IAC = 100 μ A, VRMS =0, VFB = 1V
at room temp
IAC = 100 μ A, VRMS = 1.1V, VFB = 1V
at room temp
IAC = 150 μ A, VRMS = 1.8V, VFB = 1V
at room temp
IAC = 300 μ A, VRMS = 3.3V, VFB = 1V
at room temp
IAC = 100 μ A
IAC = 250 μ A, VRMS = 1.1V, VFB = 1V
Min.
35
60
60
CM6800
Typ.
-65
75
70
75
Max.
-35
2.70 2.77 2.85
230 290
0.2 0.3 0.4
17.5 17.9 18.5
1.40 1.5 1.65
2.65 2.75 2.85
24
0.4 0.5 0.6
-1.10
20
-1.00
100
250
-0.90
0.95 1.0 1.05
250
2.35 2.45 2.55
0.95 1.2
1.4
0.70 0.84 0.95
1.80 2.00 2.20
0.90 1.00 1.10
0.25 0.32 0.40
10
0.84 0.90 0.95
Unit
μA
μA
dB
dB
V
mV
V
V
V
V
ms
V
V
mV
ns
V
ns
V
V
MHz
V
2008/10/23 Rev. 2.1
Champion Microelectronic Corporation
Page 5
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Information | Total 18 Pages | |
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Download | [ CM6800.PDF Datasheet ] |
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