Renesas HIP4081AIBZT

Overview

HIP4081AIBZT from Intersil is a high-frequency, 80V/2.5A peak full-bridge N-channel FET driver IC in a 20-lead SOIC (Wide) package. It independently drives four external N-MOSFETs in half-bridge or full-bridge topologies, supports up to 1MHz switching, features user-programmable dead time via HDEL/LDEL pins, and integrates on-chip charge-pump and bootstrap bias supplies. It is used in voice coil motor drivers, high-frequency switching power amplifiers, and medium-voltage brush motor controls.

For engineers reviewing the HIP4081AIBZT datasheet, HIP4081AIBZT pinout, HIP4081AIBZT application, or HIP4081AIBZT equivalent, key selection criteria include its 55ns typical propagation delay, 10ns typical rise/fall times into 1000pF, 80V high-side bus capability, adjustable dead-time control, and undervoltage lockout with 8.8V rising threshold.

Technical Context

The HIP4081AIBZT implements dual independent gate driver channels (A and B), each with separate high-side and low-side outputs, level-shifted high-side drivers using internal charge-pump and bootstrap supplies, and logic-controlled shoot-through prevention via input priority (e.g., ALI overrides AHI). Its architecture supports both independent and bistate operation modes, with DIS pin providing global output disable override.

Dead time is set externally via resistors on HDEL and LDEL pins-each establishing timing current for high-side or low-side turn-on delay-ensuring non-overlapping drive signals. The device operates across –40°C to +85°C ambient, requires VDD/VCC = 9.5–15V, and maintains bootstrap supply voltage at ~12.8V clamped internally.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (Wide Body), JEDEC MS-013-AC compliant, body dimensions 10.65 × 7.60 mm, lead pitch 1.27 mm, RoHS-compliant Pb-free finish (M20.3 Rev 3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar full-bridge gate driver applications.

Compared with HIP4080AIBZ, HIP4081AIBZT omits the input comparator-reducing noise sensitivity and simplifying control interface-while retaining identical drive strength, timing, and protection. Against IRS2004STRPBF, HIP4081AIBZT adds 20V bus headroom, integrated charge-pump bias, and two extra pins for independent dead-time tuning.

Availability

HIP4081AIBZT is available at Aetrix Electronics and suitable for voice coil motor control, full-bridge switching power supplies, and high-frequency audio amplifiers requiring stable component supply, long-term industrial availability, and Pb-free compliance.

Supply support for HIP4081AIBZT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Intersil Corporation is a leading provider of precision analog and power management solutions, now part of Renesas Electronics, with deep expertise in high-performance gate drivers and motor control ICs.

The HIP4081AIBZT belongs to Intersil's high-frequency full-bridge driver product line, designed specifically for demanding applications including voice coil motors, switching amplifiers, and medium-voltage motor drives where timing accuracy, shoot-through immunity, and robust biasing are critical.

FAQ

What is the maximum switching frequency supported by the HIP4081AIBZT?

The HIP4081AIBZT supports switching frequencies up to 1MHz when driving a 1000pF load with typical 10ns rise/fall times. Performance is maintained across its full operating temperature range (–40°C to +85°C), and the 55ns typical propagation delay enables stable closed-loop control at high bandwidths. Actual usable frequency depends on external MOSFET gate charge and PCB layout parasitics.

Does the HIP4081AIBZT require external bootstrap diodes and capacitors?

Yes, the HIP4081AIBZT requires external bootstrap diodes and capacitors connected to pins AHB/BHB (anode to VCC, cathode to AHB/BHB) and AHS/BHS (capacitor between AHB–AHS and BHB–BHS). The internal charge pump supplies only ~30µA to maintain the bootstrap voltage; it does not replace the need for passive bootstrap network components.

How is dead time controlled on the HIP4081AIBZT?

Dead time on the HIP4081AIBZT is controlled independently for high-side and low-side turn-on via external resistors connected from HDEL and LDEL pins to VSS. Each pin sinks ~100µA at ~5.1V, setting a current that defines the delay before respective driver turn-on - preventing shoot-through while allowing near-zero dead time adjustment.

What protection features does the HIP4081AIBZT include?

The HIP4081AIBZT includes undervoltage lockout (UVLO) with 8.8V rising threshold, DIS pin for hardware-level global output disable, built-in shoot-through prevention logic (ALI overrides AHI, BLI overrides BHI), and internal clamping of bootstrap supplies to ~12.8V. It does not include overcurrent or thermal shutdown - those must be implemented externally.

Is the HIP4081AIBZT pin-compatible with the HIP4080AIBZ?

Yes, the HIP4081AIBZT is pin-compatible with the HIP4080AIBZ in the same SOIC-20 package. The only functional difference is the absence of the on-chip input comparator in the HIP4081AIBZT; all other pins, electrical specifications, timing, and biasing are identical - enabling drop-in replacement where comparator functionality is unused.