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TEA5170 Datasheet

  • TEA5170

  • SWITCH MODE POWER SUPPLY SECONDARY CIRCUIT

  • 9頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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TEA5170
SWITCH MODE POWER SUPPLY SECONDARY CIRCUIT
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INTERNAL PWM SIGNAL GENERATOR
POWER SUPPLY WIDE RANGE 4.5V 鈥?14.5V
SOFT START
REFERENCE VOLTAGE 2V
鹵
5%
WIDE FREQUENCY RANGE 250kHz
MINIMUM OUTPUT PULSE WIDTH 500nS
MAXIMUM PRESET DUTY CYCLE
SYNCHRONIZATION WINDOW
OUTPUT SWITCH
UNDERVOLTAGE LOCKOUT
FREQUENCY RANGE WITH SYNCHRONIZA-
TION 64kHz
DIP8
(Plastic Package)
ORDER CODE :
TEA5170
DESCRIPTION
The TEA5170 is designed to work in the secondary
part of an off-line SMPS, sending pulses to the
slaved TEA2260/61 which are located on the pri-
mary side of the main transformer. An accurate
regulated voltage is obtained by duty cycle control.
The TEA5170 can be externally synchronized by
higher or lower frequency signal, then it could be
used in applications like TV set ones. For more
details, refer to application note AN408/0591.
PIN CONNECTIONS
SOFT-START CAPACITOR
SUPPLY VOLTAGE
POWER OUTPUT
CSF
V
CC
P
OUT
1
2
3
4
8
7
6
5
RT
CT
OSCILLATOR RESISTOR
OSCILLATOR CAPACITOR
GROUND GND
E
OUT
VOLTAGE ERROR AMPLIFIER OUTPUT
VOLTAGE ERROR AMPLIFIER
E
INVERTING INPUT
5170-01.EPS
September 1993
1/9

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