IR1175 Driver Datasheet

IR1175 Datasheet PDF, Equivalent


Part Number

IR1175

Description

Synchronous Rectifier Driver

Manufacture

International Rectifier

Total Page 9 Pages
PDF Download
Download IR1175 Datasheet PDF


IR1175
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)

IR1175
IR1175
ADVANCE INFORMATION
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)
Thermal resistance (SSOP-20) junction-to-case
Thermal resistance (SSOP-20) junction-to-ambient
Junction temperature
Storage temperature
Lead temperature (soldering, 10 seconds)
Min.
-55
Max.
7
+/- 10
400
28.5
90.5
150
150
300
Units
VDC
mADC
mW
°C/W
°C/W
°C
°C
°C
Recommended Operating Conditions
Symbol
Vdd
TA
Freq
Rbias
UV
Xin
Cd1/Cd2
Cf
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
Loop filter bypass capacitor
Min.
-40
250
1.75
470
Typ.
5
69.8
Max.
85
500
2.25
5.6
22
Units
VDC
°C
KHz
KW
VDC
VDC
pF
KW
2 www.irf.com


Features ADVANCE INFORMATION Data Sheet PD 60178 A 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 c onduction n Stand alone operation - no ties to primary side n Schmitt trigger input with double pulse suppression all ows operation in noisy environments n H igh current drive capability - 2A n Hig h speed operation - 2MHz n Adaptable to multiple topologies (such as singleend ed forward, double-ended forward) Prod uct Summary Vdd IO+/Fmax Max lead time 5Vdc 2A/2A 2MHz 500nsec Description Th e IR1175 is a high speed CMOS controlle r designed to drive N-channel power MOS FETs used as synchronous rectifiers in high current, high frequency forward co nverters with output voltages equal or below 5VDC. Schmitt trigger inputs with double pulse suppression allow the con troller to operate in noisy environment s. The circuit does not require any ties to the primary side an.
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