STMicroelectronics A6387DTR

Overview

A6387DTR from STMicroelectronics is a high-voltage, automotive-qualified half-bridge gate driver IC for N-channel MOSFETs and IGBTs, featuring 550 V high-side rail capability, ±50 V/ns dV/dt immunity, 400 mA source / 650 mA sink output drive, and interlocking logic. It enables robust inverter control in hybrid/electric vehicle power stages.

For engineers reviewing the A6387DTR datasheet, A6387DTR pinout, A6387DTR application, or A6387DTR equivalent, key selection criteria include bootstrap diode integration, CMOS/TTL Schmitt-trigger inputs with hysteresis, SO-8 package thermal resistance (150 °C/W), and AEC-Q100 qualification for automotive-grade reliability.

Technical Context

The A6387DTR integrates a floating high-side driver capable of operating up to 550 V referenced to VOUT, with level-shifting circuitry tolerant to fast transients (±50 V/ns). Its internal bootstrap DMOS replaces external fast-recovery diodes, reducing component count and leakage.

Logic inputs accept CMOS/TTL levels with built-in hysteresis and pull-down resistors; interlocking prevents simultaneous HVG/LVG activation. The device uses BCD™ "offline" process technology and supports switching frequencies up to 400 kHz with 1 nF load.

Key Specifications

Pinout & Package

Package: SO-8 (ECOPACK® compliant, 150 °C/W R_th(JA)), surface-mount, 1.27 mm pitch, 4.9 mm × 6.0 mm body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR2104PbF and UCC27211D, the A6387DTR uniquely combines automotive qualification, integrated bootstrap DMOS, hardware interlock, and 550 V rail tolerance-making it optimal for space-constrained, safety-critical HEV/EV and industrial inverter designs where reliability and component count reduction are prioritized.

Availability

A6387DTR is available at Aetrix Electronics and suitable for EV traction inverters, HID ballasts, and industrial motor drives requiring stable component supply, automotive-grade qualification, and SO-8 surface-mount compatibility.

Supply support for A6387DTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and power applications.

The A6387 belongs to ST's high-voltage gate driver product line, engineered specifically for robust, integrated control of N-channel power switches in automotive electrification and industrial motor systems.

FAQ

What is the purpose of the interlocking function in the A6387DTR?

The interlocking function prevents simultaneous high-side and low-side switch activation by forcing both HVG and LVG outputs low when HIN and LIN are both high. This hardware-level protection eliminates shoot-through risk in half-bridge topologies, independent of MCU firmware timing errors or signal skew-critical for automotive inverter safety.

Can the A6387DTR drive IGBTs directly without external components?

Yes-the A6387DTR provides 400 mA source and 650 mA sink gate drive current, sufficient for typical 15–30 A IGBTs used in automotive inverters. Its 550 V high-side rail rating and ±50 V/ns dV/dt immunity allow direct connection without external level shifters or transient suppressors in standard half-bridge configurations.

How does the integrated bootstrap DMOS affect C_BOOT sizing?

The internal DMOS introduces ~125 Ω R_DS(on), causing voltage drop during C_BOOT recharge (V_drop ≈ Q_gate/T_charge × R_DS(on)). For a 30 nC gate charge and 5 µs charging time, drop is ~0.8 V. Designers must increase C_BOOT or extend LVG ON time to maintain sufficient V_BOOT margin above UVLO threshold.

Is the A6387DTR compatible with 3.3 V microcontrollers?

Yes-its CMOS/TTL Schmitt-trigger inputs accept logic-high thresholds ≥3.2 V and logic-low ≤1.4 V, making them fully compatible with 3.3 V MCUs. Input hysteresis (≥0.5 V) and internal pull-down resistors ensure noise-immune interfacing without external biasing components.