1
DATASHEET
100V, 1.25A Peak, High Frequency Half-Bridge Drivers
ISL89400, ISL89401
The ISL89400, ISL89401 are 100V, high frequency, half-bridge
N-Channel power MOSFET driver ICs. They are based on the
popular HIP2100, HIP2101 half-bridge drivers, but offer
several performance improvements. The ISL89400 has
additional input hysteresis for superior operation in noisy
environments and the inputs of the ISL89401 (like those of the
ISL89400) can now safely swing to the V
DD
supply rail. Finally,
both parts are available in a very compact 9 Ld DFN package
and an 8 Ld SOIC to minimize the required PCB footprint.
Applications
• Telecom half-bridge converters
• Telecom full-bridge converters
•Two-switch forward converters
• Active-clamp forward converters
• Class-D audio amplifiers
Features
• Drives N-channel MOSFET half-bridge
• Space saving DFN package
• DFN package compliant with 100V conductor spacing
guidelines per IPC-2221
• Pb-free (RoHS compliant)
• Bootstrap supply maximum voltage to 114VDC
•On-chip 1Ω bootstrap diode
• Fast propagation times for multi-MHz circuits
• Drives 1nF load with typical rise/fall times of 16ns
• CMOS compatible input thresholds (ISL89400)
• 3.3V/TTL compatible input thresholds (ISL89401)
• Independent inputs provide flexibility
•No start-up problems
• Outputs unaffected by supply glitches, HS ringing below
ground or HS slewing at high dV/dt
•Low power consumption
• Wide supply voltage range (9V to 14V)
• Supply undervoltage protection
•4.0Ω typical output pull-up/pull-down resistance
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER INPUT THRESHOLDS
ISL89400 CMOS Compatible
ISL89401 3.3V/TTL Compatible
Application Block Diagram
FIGURE 1. APPLICATION BLOCK DIAGRAM
SECONDARY
CIRCUIT
+100V
CONTROL
CONTROLLER
PWM
LI
HI
HO
LO
V
DD
HS
HB
+12V
V
SS
REFERENCE
AND
ISOLATION
DRIVE
LO
DRIVE
HI
ISL89400
ISL89401
December 4, 2015
FN6614.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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