High Side Gate Driver
Description
FAN7085_F085 High Side Gate Driver with Recharge FET
March 2009
FAN7085_F085 High Side Gate Driver with Recharge FET
Features
• Qualified to AEC Q100 • Floating channel designed for bootstrap operation fully oper-
ational up to 300V.
• Tolerance to negative transient voltageon VS pin • dv/dt immune.
• Gate drive supply range from 4.
5V to 20V • Under-voltage lockout • CMOS Schmitt-triggered inputs with pull-down and pull-up • High side output out of phase with input (Inverted input) • Reset input • Internal recharge FET for bootstrap refresh
Typical Applications
• Diesel and gasoline injectors/valves • MOSFET-and IGBT high side driver applications
Description
The FAN7085_F085 is a high-side gate drive IC with reset input and built-in recharge FET.
It is designed for high voltage and high speed driving of MOSFET or IGBT, which operates up to 300V.
Fairchild's high-voltage process and common-mode noise cancellation technique provide stable operation in the high side driver under high-dV/dt noise circumstances.
Logic input is compatible with standard CMOS outputs.
The UVLO circuits prevent from malfunction when VCC and VBS are lower than the specified threshold voltage.
It is available with space saving SOIC-8 Package.
Minimum source and sink current capability of output driver is 250mA and 250mA.
Built-in recharge FET to refresh bootstrap circuit is very useful for circuit topology requiring switches on low and high side of load.
SOIC-8
Ordering Information
Device
Package
FAN7085CM
SOIC-8
FAN7085CMX
SOIC-8
X : Tape & Reel type
Operating Temp.
-40 °C ~ 125 °C -40 °C ~ 125 °C
©2008 Fairchild Semiconductor Corporation
FAN7085_F085 Rev.
1.
0.
3
1
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fairchildsemi.
com
FAN7085_F085 High Side Gate Driver with Recharge FET
Block Diagrams
VCC
RESETINGND
Under Voltage Reset VCC to GND
Under Voltage Reset
VB to VS
Pulse Filter Flip Flop
Brake before make
Logic Pulse Filter
Level Shifter ON
Level Shifter OFF
Delay
Pin Assignments
1 VCC
2 IN -
VB 8 7
HO
...
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