Diodes Incorporated ZXTP4003GTA

Overview

ZXTP4003GTA from Diodes Incorporated is a 100V PNP bipolar junction transistor optimized for LED TV backlight driving, featuring BV_CEO = −100 V, continuous I_C = −1 A, h_FE ≥ 100 at −150 mA/−0.2 V, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the ZXTP4003GTA datasheet, ZXTP4003GTA pinout, ZXTP4003GTA application, or ZXTP4003GTA equivalent, this device serves as a high-voltage, medium-current PNP switch in constant-current LED string control, requiring precise base drive design and thermal management on FR4 PCBs with exposed collector pad.

Technical Context

This PNP transistor operates as a high-side current sink in LED backlight circuits, where its −100 V V_CEO rating enables direct connection to boosted LED string supplies up to 80 V, and its low V_BE(on) (−0.71 to −0.95 V @ −150 mA) reduces base drive power loss. The SOT223 package provides 28.75 °C/W R_θJL via the exposed collector pad for efficient heat transfer.

Switching performance is characterized by t_s = 1348 ns and t_f = 382 ns under −80 V V_CC, −150 mA I_C, and −1.5 mA I_{B2, supporting PWM dimming frequencies up to ~100 kHz while maintaining stable conduction in linear or saturated mode.}

Key Specifications

Pinout & Package

Package: SOT223 - surface-mount plastic package with exposed collector pad for thermal conduction; 6.5 mm × 3.5 mm footprint; UL 94V-0 rated molding compound; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Compared with ZXTP4003GTA, ZXTP2012GTA trades current capacity for voltage headroom, while MJD44H11T4G sacrifices miniaturization for thermal robustness and current scalability-neither is pin-compatible, and base drive circuitry must be re-optimized.

Availability

ZXTP4003GTA is available at Aetrix Electronics and suitable for LED TV backlight control, automotive instrument cluster illumination, and industrial panel display applications requiring stable component supply, AEC-Q101 compliance, and SOT223 thermal performance.

Supply support for ZXTP4003GTA 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions.

ZXTP4003GTA belongs to Diodes' high-voltage PNP transistor product line, engineered specifically for LED backlight and automotive lighting applications demanding AEC-Q101 qualification and robust thermal performance in compact packages.

FAQ

Is ZXTP4003GTA suitable for linear (analog) LED current regulation?

Yes - its h_FE stability across −55°C to +125°C and low V_BE(on) variation support analog current control. However, power dissipation must be limited to ≤2 W with proper PCB copper area; linear operation above 500 mA at >40 V drop requires thermal derating per the R_θJA curve.

What is the recommended PCB layout for optimal thermal performance?

Use ≥25 mm × 25 mm single-sided 1 oz copper connected directly to the exposed collector pad (pin 3), with ≥4 thermal vias (0.3 mm diameter) to inner ground plane. Maintain ≥0.5 mm clearance from other components and avoid routing traces under the package body to preserve thermal path integrity.

Does ZXTP4003GTA support PWM dimming at 1 kHz or higher?

Yes - measured t_s + t_f = 1730 ns supports clean switching at 1 kHz (1 ms period) with <0.2% transition time overhead. For 10 kHz+ dimming, ensure base drive can source/sink ≥2 mA with <100 ns edge rates to minimize storage time effects.

Can ZXTP4003GTA replace NPN transistors in existing designs?

No - it is a PNP device and cannot substitute for NPN topology without circuit redesign. In high-side switch configurations, it replaces NPN only when emitter is tied to HV rail and collector drives the LED cathode; base drive polarity and current direction must be inverted accordingly.