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International Rectifier Electronic Components Datasheet

IR1176 Datasheet

SYNCHRONOUS RECTIFIER DRIVER

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Preliminary Data Sheet PD60185-C
IR1176
SYNCHRONOUS RECTIFIER DRIVER
Features
Provides constant and proper gate drive to power
MOSFETs regardless of transformer output
Minimizes loss due to power MOSFET body
drain diode conduction
Stand alone operation - no ties to primary side
Schmitt trigger input with double pulse suppress-
ion allows operation in noisy environments
High peak current drive capability - 4A
High speed operation - 2MHz
Adaptable to multiple topologies
Product Summary
Vdd
IO+/- (peak)
Fmax
Max lead time
5Vdc
4A/4A
2MHz
500nsec
Description
The IR1176 is a high speed CMOS controller designed
to drive N-channel power MOSFETs used as synchro-
nous rectifiers in high current, high frequency forward
converters with output voltages equal or below 5VDC.
Schmitt trigger inputs with double pulse suppression
allow the controller to operate in noisy environments.
The circuit does not require any ties to the primary
side and derives its operating power directly from
the secondary. The circuit functions by anticipating
transformer output transitions, then turns the power
MOSFETs on or off before the transitions of the trans-
former to minimize body drain diode conduction and
reduce associated losses. Turn on/off lead time can
be adjusted to accommodate a variety of power
MOSFET sizes and circuit conditions. The IR1176 also
provides gate drive overlap/dead-time control via
external components to further minimize diode con-
duction by nulling effects of secondary loop and de-
vice package inductance.
Packages
IR1176S
20 Lead Surface Mount
(SSOP-20)
IR1176SS
20 Lead SOIC (MS-013AC)
IR1176
20 Lead PDIP
(MS-001AD)


International Rectifier Electronic Components Datasheet

IR1176 Datasheet

SYNCHRONOUS RECTIFIER DRIVER

No Preview Available !

IR1176
Absolute Maximum Ratings
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur.
Symbol
Vdd
Iin
PD
RthJC
RthJA
TJ
TS
TL
Definition
Supply voltage
Input clamp current
Power dissipation (SSOP-20)
(SOIC)
(PDIP)
Thermal resistance (SSOP-20) junction-to-case
(SOIC) junction-to-case
(PDIP) junction-to-case
Thermal resistance (SSOP-20) junction-to-ambient
(SOIC) junction-to-ambient
(PDIP) junction-to-ambient
Junction temperature
Storage temperature
Lead temperature (soldering, 10 seconds)
Min.
-55
Max.
7
+/- 10
400
28.5
20
28.1
90.5
45
62.4
150
150
300
Units
VDC
mADC
mW
°C/W
°C
Recommended Operating Conditions
Symbol
Vdd
TA
Freq
Rbias
UV
Xin
Cd1/Cd2
Definition
Supply voltage operating range
Ambient temperature
Operating frequency
Required bias resistor (+/- 1%)
Voltage at UVSET pin
Maximum voltage at X1 and X2 inputs
Capacitance at pins DTIN1 and DTIN2
Min.
-40
250
1.75
Typ.
5
34.0
Max.
85
500
2.25
5.6
100
Units
VDC
°C
KHz
K
VDC
VDC
pF
2 www.irf.com


Part Number IR1176
Description SYNCHRONOUS RECTIFIER DRIVER
Maker International Rectifier
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IR1176 Datasheet PDF






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