IR1176S 查看數據表（PDF） - International Rectifier

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IR1176S

SYNCHRONOUS RECTIFIER DRIVER

International Rectifier 

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)

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