TK75005 Datasheet, PDF (1/9 Pages) TOKO, Inc – LOW-COST FLEXIBLE PWM CONTROLLER

TK75005
ADVANCED
INFORMATION
LOW-COST FLEXIBLE PWM CONTROLLER
FEATURES
s Can Be Used For Power Factor Correction/Line
Harmonics Reduction to Meet IEC1000-3-2
Requirements
s Maximum Duty Ratio 89% (typ.)
s Low Standby Current for Current-Fed Start-Up
s Current-Mode or Voltage-Mode Control
s Internal User-Adjustable Slope Compensation
s Pulse-by-Pulse Current Limiting
APPLICATIONS
s Power Factor Correction Converters
s Off-Line Power Supplies
s Industrial Power Supplies
s Off-Line Battery Charger
TK75005
DESCRIPTION
The TK75005 is an 8-pin PWM controller suitable for both
voltage-mode and current-mode control. It also has
advanced features not available in controllers with a higher
pin count. One such feature is a sawtooth current flowing
out of the feedback pin (FB), which provides a slope
compensation ramp (in current mode applications) in
proportion to the resistance terminating that FB pin.
The TK75005 offers the same features as the TK75003
with the addition of the Error Amplifier and the Overvoltage
Protection (OVP) functions, and the deletion of the
Overcurrent Frequency Reduction feature.
This PWM has features similar to the UC3842 (please
refer to UC3842 Comparison Section).
75005
SOP-8
DRV
GND
OVP
CT
75005
DIP-8
DRV
GND
OVP
CT
VCC
EAOUT
EAIN
FB
VCC
EAOUT
EAIN
FB
ORDERING INFORMATION
TK75005
Package Code
Tape/Reel Code
Temp. Range
PACKAGE CODE
D: DIP-8
M: SOP-8
TEMPERATURE RANGE
C: -40 TO 80 C
TAPE/REEL CODE
TL: Tape Left
MG: Magazine
ICT
CT
BLOCK DIAGRAM
VCC
ICHG
175 µA
IDS
1.975 mA
OSCILLATOR
BANDGAP
REFERENCE
fCLK
UVLO
10.0 V
8.0 V
OVP
FB
SLOPE
COMPENSATION
OVERVOLTAGE
DETECTOR
PWM LATCH
S
Q
R
2.6 V
CURRENT
CONTROL
DETECTOR
1.02 V
GM STAGE
DRV
EAIN
2.5 V
EAOUT GND
January 1999 TOKO, Inc.
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