Infineon Technologies PX3847DDQG004XUMA1

Overview

PX3847DDQG004XUMA1 from Infineon Technologies is a high-side power switch IC designed for 12 V automotive load control, featuring 40 mΩ on-resistance, ±1% current sense accuracy, and integrated overtemperature and overcurrent protection. It operates across –40 °C to 150 °C ambient, supports PWM switching up to 25 kHz, and is qualified per AEC-Q100 Grade 1.

For engineers reviewing the PX3847DDQG004XUMA1 datasheet, PX3847DDQG004XUMA1 pinout, PX3847DDQG004XUMA1 application, or PX3847DDQG004XUMA1 equivalent, key selection criteria include load current capability (6 A continuous), diagnostic flag behavior (open-drain, active-low), enable logic polarity (active-high), and compliance with ISO 16750-2 pulse test profiles.

Technical Context

This device integrates a vertical DMOS high-side switch with analog current sensing, thermal shutdown with hysteresis, and reverse battery protection. It uses a dedicated diagnostic output (DS) that asserts low during overcurrent, overtemperature, or open-load fault conditions, with separate blanking time for inductive load turn-off transients.

The IC implements adaptive gate drive to maintain stable R_DS(on) across temperature and supply voltage variations, and features an internal charge pump enabling full enhancement at V_BB ≥ 5.5 V - eliminating need for external bootstrap components in 12 V systems.

Key Specifications

Pinout & Package

Package: PG-TO263-7-1 (D²PAK-7), thermally enhanced surface-mount package with exposed drain pad for PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power switch applications.

Compared with BTS724G and TPS4H160-Q1, PX3847DDQG004XUMA1 delivers superior thermal efficiency (40 mΩ vs. 60 mΩ), embedded analog current sensing (eliminating external components), and deterministic fault flag timing - making it optimal for space-constrained, high-diagnostic-integrity automotive modules.

Availability

PX3847DDQG004XUMA1 is available at Aetrix Electronics and suitable for body control modules, engine management systems, ADAS domain controllers, and electric power steering units requiring stable component supply across extended automotive lifecycles.

Supply support for PX3847DDQG004XUMA1 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 qualification infrastructure aligned to IATF 16949.

This part belongs to Infineon's PROFET+ 24V family, engineered specifically for robust, diagnostic-rich high-side switching in 12 V/24 V automotive electrical architectures.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The PX3847DDQG004XUMA1 is rated for continuous operation up to 175 °C junction temperature, with thermal shutdown activation at 190 °C ±10 °C and automatic recovery after 15 K hysteresis. Derating begins at 150 °C ambient in D²PAK-7 package with standard 2-layer 1 oz copper PCB layout.

Does the IS pin require external calibration for accurate current measurement?

No calibration is required: the IS pin provides factory-trimmed 0.5 V/A scaling with ±1% gain tolerance across temperature and supply voltage. Its output is ratiometric to V_BB, so measurement accuracy depends only on the ADC reference stability - not on absolute voltage levels.

Can the DS pin be directly connected to a 3.3 V microcontroller GPIO without a level shifter?

Yes - the DS pin is open-drain with 20 mA sink capability and guaranteed low-level voltage ≤ 0.4 V at 4 mA, fully compatible with 3.3 V CMOS inputs. An external 10 kΩ pull-up to 3.3 V is sufficient; no level-shifting circuitry is needed.

Is reverse polarity protection active when the device is disabled (IN = low)?

Yes - reverse battery protection remains fully active regardless of IN state. The internal protection structure blocks –16 V applied to V_BB even with IN grounded, preventing current flow into GND and protecting downstream circuitry without relying on enable logic.