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The HIP4080 is a member of
the HIP408X family of High
Frequency H-Bridge Driver ICs. A simplified application
diagram is shown in Figure 1. The HIP4080 H-Bridge driver
IC provides the ability to operate from 8VDC to 80VDC
busses for driving N-Channel MOSFET H-Bridges, The
HIP4080 packaged in either 20 lead DIP or 20 lead SOIC,
provides peak gate current drive of 2.5A.
A combination of bootstrap and charge-pumping techniques
is used to power the circuitry which drives the upper
MOSFETs of the H-Bridge.
The bootstrap technique
supplies the high instantaneous current needed for turning
on the power devices, while the charge pump provides
enough current to maintain bias voltage on the upper driver
sections and MOSFETs. Since voltages on the upper bias
supply pin “float” with the source terminals of the upper
power switches, the design of this family provides voltage
capability for the upper bias supply terminals to 95VDC