STSR3 반도체 회로 부품 판매점
SYNCHRONOUS RECTIFIERS SMART DRIVER
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 STMicroelectronics |
STSR3
SYNCHRONOUS RECTIFIERS
SMART DRIVER FOR FLYBACK
s SUPPLY VOLTAGE RANGE: 4V TO 5.5V
s TYPICAL PEAK OUTPUT CURRENT:
(SOURCE 2A, SINK 3.5A)
s OPERATING FREQUENCY: 30 TO 750 KHz
s SMART TURN-OFF ANTICIPATION TIMING
s AUTOMATIC TURN OFF FOR DUTY CYCLE
LESS THAN 14%
s POSSIBILITY TO OPERATE IN
DISCONTINUOUS MODE
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DESCRIPTION
STSR3 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withdrawn on the secondary side of the isolation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
SO-8
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 allows to shut-off the drive output. This
feature makes discontinuous conduction mode
possible and avoids reverse conduction of the
synchronous rectifier.
SCHEMATIC DIAGRAM
June 2003
CK 4
PEAK
DETECTOR
+
HIGH
FREQUENCY
OSCILLATOR
INHIBIT 5
-
+
25mV
Vcc
2
BIAS
UVLO
+
5.7V
ANTICIPATION
SET
3 SETANT
DIGITAL
CONTROL
OUTPUT +
BUFFER
7 OUTGATE
6
SGLGND
8
PWRGND
1 N/C
1/12
STSR3
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC DC Input Voltage
-0.3 to 6
V
VOUTGATE Max Gate Drive Output Voltage
-0.3 to VCC
V
VINHIBIT Max INHIBIT Voltage (*)
-0.6 to VCC
V
VCK Clock Input Voltage Range (*)
-0.3 to VCC
V
PTOT Continuous Power Dissipation at TA=105°C without heatsink
270 mW
ESD Human Body Model
Pins 1,2, 4, 5, 6, 7, 8
±1
KV
Pin 3
±0.9
KV
Tstg Storage Temperature Range
-55 to +150
°C
Top Operating Junction Temperature Range
-40 to +125
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
(*) A higher positive voltage level can be applied to the pin with a resistor which limits the current flowing into the pin to 10mA maximum
THERMAL DATA
Symbol
Parameter
SO-8
Unit
Rthj-amb Thermal Resistance Junction-case
40 °C/W
Rthj-amb Thermal Resistance Junction-ambient (*)
160 °C/W
(*) This value is referred to one layer pcb board with minimum copper connections for the leads. a minimum value of 120 °C/W can be
obtained improving thermal conductivity of the board
ORDERING CODES
TYPE
STSR3
SO-8
STSR3CD
SO-8 (T&R)
STSR3CD-TR
CONNECTION DIAGRAM (top view)
2/12
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제조업체: STMicroelectronics
( stm )
STSR3 rectifier
데이터시트 다운로드 :
[ STSR3.PDF ]
[ STSR3 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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