TK75005
TK75005 is LOW-COST FLEXIBLE PWM CONTROLLER manufactured by TOKO.
ADVANCED INFORMATION 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 pensation s Pulse-by-Pulse Current Limiting
LOW-COST FLEXIBLE PWM CONTROLLER APPLICATIONS s s s s Power Factor Correction Converters Off-Line Power Supplies Industrial Power Supplies Off-Line Battery Charger
VCC EAOUT EAIN FB
DESCRIPTION
750 05
GND OVP
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 pensation 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 parison Section).
SOP-8
VCC EAOUT EAIN FB
GND OVP
DIP-8
BLOCK DIAGRAM
VCC ICT CT ICHG 175 µA OSCILLATOR IDS 1.975 m A f CLK BANDGAP REFERENCE 10.0 V 8.0 V UVLO
ORDERING INFORMATION
Tape/Reel Code Package Code Temp. Range
OVP 2.6 V CURRENT CONTROL DETECTOR GM STAGE 1.02 V SLOPE PENSATION PWM LATCH S Q DRV R OVERVOLTAGE DETECTOR
EAIN 2.5 V
PACKAGE CODE
D: DIP-8 M: SOP-8
TEMPERATURE RANGE
C: -40 TO 80 C
TAPE/REEL CODE
TL: Tape Left MG: Magazine
EAOUT
January 1999 TOKO, Inc.
Page...
