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參數資料
| 型號： | STSR30D-TR |
| 廠商： | 意法半導體 |
| 英文描述： | SYNCHRONOUS RECTIFIER SMART DRIVER FOR FLYBACK |
| 中文描述： | 智能驅動同步整流用于回掃 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 197K |
| 代理商： | STSR30D-TR |
1/10
January 2004
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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
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DESCRIPTION
STSR30 Smart Driver IC provides a high current
outputs
to
properly
drive
Mosfets used as Synchronous Rectifier in low
output
voltage,
high
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withdrawn on the secondary side of the isolation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
shoot-through conditions at turn-on of the primary
secondary
Power
efficiency
Flyback
secondary
side
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
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
consumption.
voltage
across
the
overall
current
STSR30
SYNCHRONOUS RECTIFIER
SMART DRIVER FOR FLYBACK
BLOCK DIAGRAM
SO-8
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