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STSR30D-TR Datasheet

  • STSR30D-TR

  • SYNCHRONOUS RECTIFIER SMART DRIVER FOR FLYBACK

  • 10頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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STSR30
SYNCHRONOUS RECTIFIER
SMART DRIVER FOR FLYBACK
s
s
s
s
s
s
SUPPLY VOLTAGE RANGE: 4V TO 5.5V
TYPICAL PEAK OUTPUT CURRENT:
(SOURCE-SINK: 1.5A)
OPERATING FREQUENCY: 20 TO 500 KHz
INHIBIT BLANKING TIME: 700 ns
AUTOMATIC TURN OFF FOR DUTY-CYCLE
LESS THAN 14%
POSSIBILITY TO OPERATE IN
DISCONTINUOUS MODE
SO-8
DESCRIPTION
STSR30 Smart Driver IC provides a high current
outputs to properly drive secondary Power
Mosfets used as Synchronous Rectifier in low
output
voltage,
high
efficiency
Flyback
Converters. From a synchronizing clock input,
withdrawn on the secondary side of the isolation
transformer, the IC generates a driving signal with
set dead times with respect to the primary side
PWM signal.
The IC operation prevents secondary side
shoot-through conditions at turn-on of the primary
BLOCK DIAGRAM
switch providing anticipation in turn-off the output.
This smart function is implemented by a fast
cycle-after-cycle logic control mechanism, based
on a high frequency oscillator synchronized by the
clock signal. This anticipation is externally set
through external component. A special Inhibit
function, detecting the voltage across the
Synchronous FET, allows to shut-off the drive
output during discontinuous mode condition. A
Disable pin allows turning off the device during
no-load condition reducing overall current
consumption.
January 2004
1/10

STSR30D-TR 產(chǎn)品屬性

  • STMicroelectronics

  • 開關變換器、穩(wěn)壓器與控制器

  • 0.45 V

  • - 40 C to + 125 C

  • SMD/SMT

  • SO-8

  • Reel

  • 2500

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