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PDF IR1175 Data sheet ( Hoja de datos )
| Número de pieza | IR1175 | |
| Descripción | Synchronous Rectifier Driver | |
| Fabricantes | International Rectifier | |
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ADVANCE INFORMATION
Data Sheet PD 60178A
IR1175
Synchronous Rectifier Driver
Features
n Provides constant and proper gate drive to power
MOSFETs regardless of transformer output
n Minimizes loss due to power MOSFET body
drain diode conduction
n Stand alone operation - no ties to primary side
n Schmitt trigger input with double pulse suppress-
ion allows operation in noisy environments
n High current drive capability - 2A
n High speed operation - 2MHz
n Adaptable to multiple topologies (such as single-
ended forward, double-ended forward)
Product Summary
Vdd
IO+/-
Fmax
Max lead time
5Vdc
2A/2A
2MHz
500nsec
Description
The IR1175 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 IR1175 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.
Package
20 Lead Surface Mount (SSOP-20)
1 page  
ADVANCE INFORMATION
IR1175
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 | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet IR1175.PDF ] | |
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