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PDF IR1176 Data sheet ( Hoja de datos )
| Número de pieza | IR1176 | |
| Descripción | SYNCHRONOUS RECTIFIER DRIVER | |
| Fabricantes | International Rectifier | |
| Logotipo |  |
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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)
1 page  
IR1176
Fig. 1 Typical application circuit when supply Vout < 5.0 VDC
www.irf.com
Fig. 2 Typical application circuit when supply Vout = 5.0 VDC
5
5 Page 
Case Outline
IR1176
20 Lead SOIC
01-6070 00
01-3080 00 (MS013AC)
www.irf.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet IR1176.PDF ] | |
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