NXP Semiconductors MC33288DDH

Overview

MC33288DDH from Freescale Semiconductor is a dual-channel automotive high-side power switch designed for flasher control in turn-signal and hazard lighting systems. It integrates two 25 mΩ R_DS(ON) switches (8 A nominal per channel), a dedicated 1.2 W warning lamp driver (WLP), current recopy (1/1000 ratio), open-load detection, and overtemperature protection with hysteresis. It operates from 8.0 V to 35 V and supports junction temperatures up to 150°C.

For engineers reviewing the MC33288DDH datasheet, MC33288DDH pinout, MC33288DDH application, or MC33288DDH equivalent, key selection criteria include its dual high-side architecture, integrated diagnostics (STATUS and CUR R), thermal robustness in HSOP-20 package, and automotive-grade voltage tolerance - all critical for reliable flasher module design.

Technical Context

The MC33288DDH implements two independent N-channel high-side MOSFETs with charge-pump gate drive, each featuring current limiting (30 A typical hot short-circuit clamp), thermal shutdown at 150°C with 10°C hysteresis, and hot open-load detection via V_BAT–V_OUT differential sensing. Its status output is a single open-drain fault indicator active low for both channels.

It incorporates a shared current sense terminal (CUR R) delivering a ground-referenced 1/1000-ratio copy of total output current (±10% accuracy in 2–4 A range), enabling MCU-based lamp failure detection without external shunts. The WLP output activates only when both IN1 and IN2 are high, driving a dashboard warning lamp with 3.2 Ω R_DS(ON) at 25°C.

Key Specifications

Pinout & Package

The MC33288DDH is housed in a 20-lead HSOP (Heat Sink Over Package) surface-mount package with exposed backside TAB connected to V_BAT for enhanced thermal conduction to the PCB. Thermal resistance is 2.0°C/W junction-to-case and 25°C/W junction-to-ambient (with 10 cm² copper heatsink).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN250 and TPS4H160-Q1, the MC33288DDH uniquely combines dual-channel high-side switching, integrated current recopy, open-load detection, and a dedicated WLP driver - making it purpose-built for automotive flasher modules requiring compact, diagnostic-rich, single-package solutions.

Availability

MC33288DDH is available at Aetrix Electronics and suitable for automotive lighting control, body electronics modules, and trailer interface systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.

Supply support for MC33288DDH 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 microcontrollers, analog ICs, and power management solutions.

The MC33288DDH belongs to Freescale's automotive analog power switch product line, engineered specifically for intelligent lighting control with integrated diagnostics and thermal resilience in harsh vehicle environments.

FAQ

What is the maximum continuous output current per channel for the MC33288DDH?

The MC33288DDH supports 8.0 A nominal continuous output current per channel at 25°C ambient with proper PCB thermal design. At 150°C junction temperature, R_DS(ON) increases to 40 mΩ, requiring derating; peak pulse current is clamped at 30 A typical during lamp inrush. This rating assumes use of the recommended 10 cm² copper heatsink and adherence to the 25°C/W junction-to-ambient thermal resistance specification.

How does the current recopy function work on the MC33288DDH?

The MC33288DDH delivers a ground-referenced analog current on the CUR R pin equal to 1/1000 of the sum of OUT1 and OUT2 currents (±10% accuracy from 2–4 A). An external resistor converts this to a measurable voltage for MCU A/D conversion. The terminal includes internal 5.5–7.0 V clamping to protect the MCU input, enabling direct connection without additional protection circuitry.

Can the MC33288DDH drive a 21 W turn signal lamp reliably?

Yes - the MC33288DDH is explicitly designed for automotive flasher applications including 21 W lamps. At 13.5 V battery, a 21 W lamp draws ~1.56 A; the device supports up to 8 A per channel, allowing simultaneous drive of three 21 W + two 5 W lamps. Its 25 mΩ R_DS(ON) limits conduction loss to ~195 mW per lamp, ensuring thermal stability under continuous flashing duty cycles.

What fault conditions trigger the STATUS output on the MC33288DDH?

The STATUS pin on the MC33288DDH goes low (open-drain active) for two fault conditions: overtemperature (junction ≥150°C with 10°C hysteresis) and hot open-load (output current <1 A while channel is enabled). It reports faults from either or both channels on a single pin, requiring an external 5 V pull-up resistor. No other faults - such as overvoltage or short-circuit - assert STATUS directly; those are managed internally via current limiting and thermal shutdown.

Is the MC33288DDH compatible with 12 V and 24 V vehicle electrical systems?

Yes - the MC33288DDH operates across 8.0 V to 35 V, covering 12 V passenger vehicles (9–16 V nominal), 24 V commercial trucks (18–32 V nominal), and transient conditions including cold-crank (down to 6 V, though functional minimum is 8 V) and load dump (up to 40 V breakdown rating). Its -40°C to 125°C operating temperature range and AEC-Q100 alignment ensure reliability across both platforms.