Diodes Incorporated ZXMS82120S14PQ-13

Overview

ZXMS82120S14PQ from Diodes Incorporated is a dual-channel high-side power switch in SO-14EP package, integrating n-channel vertical MOSFETs with on-die current/temperature sensing, charge-pump gate drive, and diagnostic feedback. It operates from 5V–28V supply, delivers 2.5A nominal load current per channel, features 240mΩ R_DS(ON) at +150°C, and supports 3.3V/5V logic-level inputs for automotive body electronics switching.

For engineers reviewing the ZXMS82120S14PQ datasheet, ZXMS82120S14PQ pinout, ZXMS82120S14PQ application, or ZXMS82120S14PQ equivalent, this device serves as a robust AEC-Q100 qualified replacement for relays/fuses in 12V grounded-load systems requiring real-time current sense, open-load detection, and fault signaling under overload, overtemperature, short-circuit, or loss-of-ground conditions.

Technical Context

The ZXMS82120S14PQ implements two independent high-side IntelliFET® channels with monolithic vertical power MOSFETs, each featuring integrated temperature and current sensors. Its charge-pumped gate driver enables full enhancement from 3.3V/5V logic without external boost circuitry, while voltage-dependent current limiting and dynamic thermal cycling (ΔT_J(SW) = 80K) provide adaptive protection during sustained overload.

Diagnostic functionality is controlled via DEN (diagnostic enable) and DSEL (channel select) pins, routing proportional load current (K_ILIS = 550) or defined fault current (I_IS(FAULT)) to the IS pin. Open-load detection operates in both ON-state (via current sense) and OFF-state (via output voltage monitoring), and the device includes active clamps for VS-to-GND (V_S(AZ) = 47V typ), OUT-to-GND, and VS-to-OUT transients.

Key Specifications

Pinout & Package

Package: SO-14EP (exposed heatsink pad), RoHS-compliant, halogen- and antimony-free "Green" construction. The exposed pad (EP) connects internally to VS and must be soldered to a thermal pad on PCB for optimal junction-to-soldering-point thermal performance (R_θJS = 4°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTS716G and VNQ7E100AJ, the ZXMS82120S14PQ uniquely combines dual-channel integration, analog current sense (K_ILIS = 550), and direct logic-level control-enabling compact, self-diagnosing high-side switching without added ICs or firmware overhead.

Availability

ZXMS82120S14PQ is available at Aetrix Electronics and suitable for automotive body control, industrial 24V power distribution, and embedded lighting systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for ZXMS82120S14PQ 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs for automotive, industrial, computing, and consumer markets, with manufacturing certified to IATF 16949.

The ZXMS82120S14PQ belongs to Diodes' IntelliFET® high-side switch product line, engineered specifically for automotive-grade load switching with integrated protection and diagnostics-reducing system complexity in body electronics and power distribution units.

FAQ

What is the maximum continuous load current per channel at +105°C ambient?

At +105°C ambient on a 50mm × 50mm × 1.5mm FR4 PCB with 2oz copper, the ZXMS82120S14PQ delivers 2.5A per channel continuously (T_J < +150°C). Derating is required above +85°C ambient due to R_DS(ON) increase and thermal resistance limitations; full 2.5A rating assumes proper heatsinking via the exposed pad.

How does open-load detection work in the OFF state?

In OFF state, open-load detection monitors OUTx voltage relative to VS. If the load is disconnected, OUTx floats to VS potential; if connected, OUTx drops due to leakage paths. The internal comparator detects this voltage difference and asserts I_IS(FAULT) on the IS pin-enabling fault identification without enabling the channel or drawing load current.

Can both channels be used simultaneously with shared IS diagnostics?

No-only one channel's current can be monitored on the IS pin at a time, selected by the DSEL pin. Using both channels concurrently with shared IS requires time-multiplexed diagnostics and risks missing transient faults. Diodes recommends independent IS routing or sequential channel activation for reliable dual-channel monitoring.

What external components are mandatory for reverse-battery protection?

Reverse-battery protection requires external series resistors: R_INx = R_DEN = R_DSEL = 4.7kΩ and R_GND = 150Ω. These limit fault current into logic pins and GND during −12V/−16V events, preventing latch-up and ensuring the device remains non-operational while surviving the condition per AEC-Q100 stress requirements.