The HIP4081A is a high frequency, medium voltage Full
Bridge N-Channel FET driver IC, available in 20 lead plastic
SOIC and DIP packages. The HIP4081A can drive every
possible switch combination except those which would
cause a shoot-through condition. The HIP4081A can switch
at frequencies up to 1MHz and is well suited to driving Voice
Coil Motors, high-frequency switching power amplifiers, and
power supplies.
For example, the HIP4081A can drive medium voltage brush
motors, and two HIP4081As can be used to drive high
performance stepper motors, since the short minimum
“on-time” can provide fine micro-stepping capability.
Short propagation delays of approximately 55ns maximizes
control loop crossover frequencies and dead-times which
can be adjusted to near zero to minimize distortion, resulting
in rapid, precise control of the driven load.
A similar part, the HIP4080A, includes an on-chip input
comparator to create a PWM signal from an external triangle
wave and to facilitate “hysteresis mode” switching.
The Application Note for the HIP4081A is the AN9405.

Features
• Independently Drives 4 N-Channel FET in Half Bridge or
Full Bridge Configurations
• Bootstrap Supply Max Voltage to 95VDC
• Drives 1000pF Load at 1MHz in Free Air at 50°C with Rise
and Fall Times of Typically 10ns
• User-Programmable Dead Time
• On-Chip Charge-Pump and Bootstrap Upper Bias
Supplies
• DIS (Disable) Overrides Input Control
• Input Logic Thresholds Compatible with 5V to 15V Logic
Levels
• Very Low Power Consumption
• Undervoltage Protection
• Pb-free Available

Applications
• Medium/Large Voice Coil Motors
• Full Bridge Power Supplies
• Switching Power Amplifiers
• High Performance Motor Controls
• Noise Cancellation Systems
• Battery Powered Vehicles
• Peripherals
• U.P.S.