Infineon Technologies BTM7742GXUMA1

Overview

BTM7742GXUMA1 from Infineon Technologies is a fully integrated high-current H-bridge IC for automotive motor control, featuring dual p-channel high-side and dual n-channel low-side MOSFETs in one PG-DSO-36-29 package, 250 mΩ typical R_DS(on) @ 25 °C, 12 A typical current limit, and logic-level inputs with integrated dead time generation. It enables protected PWM-driven DC motors in power seats, sunroofs, and HVAC actuators.

For engineers reviewing the BTM7742GXUMA1 datasheet, BTM7742GXUMA1 pinout, BTM7742GXUMA1 application, or BTM7742GXUMA1 equivalent, key selection criteria include its AEC-Q100 qualification, 8–28 V operational supply range, latch-type overtemperature shutdown, current sense output (IS), and sleep-mode inhibit (INH) functionality.

Technical Context

The BTM7742GXUMA1 implements a four-switch H-bridge topology with integrated gate drivers, eliminating external charge pumps via p-channel high-side switches. Its digital input logic (IN1/IN2/INH) controls forward/reverse/brake/sleep states, while internal protection monitors overvoltage (45 V abs max), undervoltage (5.5 V min functional), and junction temperature (150 °C max).

Current sensing is achieved through a dedicated IS pin delivering proportional analog voltage during active conduction, and fault diagnosis includes latched overtemperature shutdown and short-circuit detection with switch-mode current limiting to reduce thermal stress during overload events.

Key Specifications

Pinout & Package

BTM7742GXUMA1 is housed in a thermally enhanced PG-DSO-36-29 package (36-pin exposed-pad SOIC variant) with VS and GND pins distributed across multiple locations to minimize PCB trace resistance and improve current handling and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current H-bridge motor drive applications.

Compared with VNHD7008AYTR and DRV8876NQPWRQ1, BTM7742GXUMA1 uniquely combines latch-mode thermal protection, integrated current sense, and p-channel high-side architecture - making it optimal for AEC-Q100-compliant applications demanding robust fault containment and minimal external components.

Availability

BTM7742GXUMA1 is available at Aetrix Electronics and suitable for automotive power seat systems, sunroof motor drives, and HVAC blower control requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for BTM7742GXUMA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification aligned to IATF 16949.

BTM7742GXUMA1 belongs to Infineon's Trilith family of integrated H-bridge drivers, designed specifically for high-reliability, space-constrained automotive body electronics requiring integrated protection, diagnostics, and reduced EMI.

FAQ

What is the maximum allowable single-pulse current for BTM7742GXUMA1?

The BTM7742GXUMA1 supports up to 20 A for pulses shorter than 100 µs at T_C < 85 °C, as defined in Figure 4 of the datasheet. Pulse current is limited by thermal mass and protection activation - sustained currents above 3.2 A require careful PCB copper area and heatsinking to avoid triggering overtemperature latch.

Does BTM7742GXUMA1 support 3.3 V logic inputs?

Yes - the IN1, IN2, and INH inputs accept 3.3 V CMOS logic levels (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), enabling direct interfacing with modern automotive microcontrollers without level-shifting circuitry.

How does the IS pin function during normal operation versus fault conditions?

During conduction, IS outputs an analog voltage proportional to motor current (typically 0.5 V/A). During overcurrent, overtemperature, or short-circuit events, IS pulls low and remains latched until INH is toggled - providing unambiguous fault signaling and eliminating need for polling or external comparators.

Can BTM7742GXUMA1 operate from a 24 V truck battery system?

Yes - the device supports an extended supply range of 5.5–28 V and absolute maximum VS rating of 45 V, making it compatible with 24 V commercial vehicle systems. However, overtemperature protection is only guaranteed up to 18 V; operation at 24 V requires derating based on thermal analysis and PCB layout.