NXP Semiconductors MC33486ADHR2

Overview

MC33486ADHR2 from Freescale Semiconductor is a dual-channel, self-protected high-side power switch IC designed for H-bridge DC motor control. It integrates two 15 mΩ N-channel high-side MOSFETs, dual low-side gate drivers (GLS1/GLS2), overtemperature/overcurrent/overvoltage/undervoltage protection, and current recopy (1:3700 ratio) for real-time load monitoring. It operates from 8.0 V to 28 V, supports PWM up to 30 kHz, and delivers 10 A nominal DC current per channel at TA = 85°C.

For engineers reviewing the MC33486ADHR2 datasheet, MC33486ADHR2 pinout, MC33486ADHR2 application, or MC33486ADHR2 equivalent, this device serves as a relay-replacement solution in automotive body electronics, industrial actuators, and bidirectional motor drives requiring fault diagnostics, thermal robustness, and EMI-optimized switching speed adaptation.

Technical Context

The MC33486ADHR2 implements a dual-channel architecture with independent IN1/IN2 control inputs driving high-side outputs (OUT1/OUT2) and external low-side MOSFET gates (GLS1/GLS2). Each channel features integrated high-side RDS(ON) sensing, cross-conduction prevention logic, and self-adjusting slew rate (1–40 V/µs) that switches between high-speed (<250 µs input edge interval) and low-speed modes to minimize electromagnetic emissions.

Protection is implemented at both high-side (overcurrent shutdown at 35 A typical, thermal shutdown at 150°C) and low-side (VGS/VDS-based overload detection with 3.0 µs blanking time). The status output (ST) provides open-drain fault reporting for overtemperature and overcurrent events on either channel, while undervoltage (7.0 V) and overvoltage (29 V) thresholds trigger safe-state transitions without ST assertion.

Key Specifications

Pinout & Package

MC33486ADHR2 is housed in a 20-terminal HSOP (Heat Sink Over Package) package with exposed backside TAB connected to VBAT. The package provides low thermal resistance (RθJC = 2.0°C/W) and supports high-current routing via multiple parallel source terminals per channel.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side H-bridge driver applications.

Compared with BTS716G and VNQ7E100AJ, MC33486ADHR2 uniquely combines dual high-side switching, external low-side gate drive capability, and analog current recopy in a single HSOP package-enabling compact, self-diagnosing H-bridge designs without external current-sense circuitry or coordination logic.

Availability

MC33486ADHR2 is available at Aetrix Electronics and suitable for automotive body control modules, industrial motion controllers, and medical device motor drives requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.

Supply support for MC33486ADHR2 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

Freescale Semiconductor (now part of NXP Semiconductors) is a global leader in automotive and industrial analog/mixed-signal ICs, known for robust power management solutions meeting stringent automotive qualification standards.

The MC33486A product line was specifically engineered for fault-tolerant H-bridge motor control in 12 V/24 V automotive systems, emphasizing thermal resilience, integrated diagnostics, and EMI-aware switching behavior.

FAQ

What is the maximum continuous current rating for MC33486ADHR2 per channel?

The MC33486ADHR2 supports 10 A DC per channel at an ambient temperature of 85°C when mounted on a PCB with 25°C/W junction-to-ambient thermal resistance. This rating assumes proper heatsinking via the exposed VBAT tab and adherence to the recommended copper layout (10 cm² total, 2.5 cm² top / 7.5 cm² bottom). At lower ambient temperatures or with enhanced cooling, higher currents may be sustained temporarily, but the 10 A value is the validated continuous operational limit per channel.

How does the self-adjusting switching speed feature work in MC33486ADHR2?

The MC33486ADHR2 automatically selects between high-speed mode (10–40 V/µs slew rate) and low-speed mode (0.5–1.0 V/µs) based on the timing of consecutive input edges at IN1 or IN2. If the delay between edges is below 250 µs (≈2 kHz at 50% duty), high-speed mode activates for fast response; delays above 250 µs engage low-speed mode to reduce EMI. This occurs without external configuration and applies independently per channel.

Can MC33486ADHR2 operate without external low-side MOSFETs?

Yes, MC33486ADHR2 can operate in high-side-only mode, but only if low-side overcurrent protection conditions are avoided. Without external low-side MOSFETs, the GLS1/GLS2 pins must be terminated with a 470 pF capacitor in parallel with a 100 kΩ resistor to prevent false triggering of the VGS/VDS-based overload detection. However, full H-bridge functionality-including braking and direction reversal-requires two external N-channel MOSFETs driven by GLS1/GLS2.

What is the purpose of the Cur R terminal on MC33486ADHR2?

Cur R provides a current-mirrored analog output equal to (IOUT1 + IOUT2)/3700, enabling real-time monitoring of total high-side load current using a standard MCU ADC. A 1 kΩ pull-down resistor converts the current signal to a ground-referenced voltage. The ratio remains stable across temperature (-40°C to 105°C), making it suitable for closed-loop current regulation and stall detection without adding shunt resistors or amplifiers.

Does MC33486ADHR2 include reverse battery protection?

MC33486ADHR2 does not integrate reverse battery protection. Its internal high-side MOSFET body diodes conduct during reverse polarity, potentially causing damage or uncontrolled current flow. The datasheet explicitly recommends adding external protection-such as a series MOSFET or diode in the VBAT or GND path-to ensure immunity against reverse battery and negative transients. This external component must be selected to handle full load current and voltage ratings.