Infineon Technologies TDA21103

Overview

TDA21103 from Infineon Technologies is a dual high-speed MOSFET gate driver IC designed for synchronous half-bridge DC/DC converters, supporting up to 1 MHz switching frequency, adjustable high-side/low-side gate drive voltage (6–12 V via PVCC), and integrated bootstrap diode. It targets multi-phase CPU VRMs on desktop motherboards with fast rise/fall times and adaptive shoot-through prevention.

For engineers reviewing the TDA21103 datasheet, TDA21103 pinout, TDA21103 application, or TDA21103 equivalent, key selection criteria include propagation delay consistency, bootstrapped high-side drive capability, PVCC-adjustable gate voltage optimization, and compatibility with standard PWM controllers (e.g., Intersil, Analog Devices) in high-density VRM designs.

Technical Context

The TDA21103 implements two independent high-speed driver channels-each with dedicated control logic, shoot-through protection, and power-on overvoltage protection. Its floating high-side drive architecture supports N-channel MOSFETs in half-bridge configurations, with matched propagation delays and sub-100 ns rise/fall times at 12 V PVCC.

It features adaptive gate drive control to prevent cross-conduction, three-state PWM inputs enabling shutdown mode (low quiescent current), and internal bias generation referenced to PGND/VCC. The device operates across 10.8–13.2 V VCC and 6–13.2 V PVCC, with thermal limits up to TJ = 125 °C and ambient TA ≤ 70 °C.

Key Specifications

Pinout & Package

Package: P-DSOP-14 (14-pin plastic dual small outline package, exposed pad for thermal dissipation).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-speed gate driver applications.

Compared with HIP6602B and IR2110, the TDA21103 uniquely combines PVCC-adjustable gate drive, integrated bootstrap diode, and power-on OVP-making it superior for space-constrained, high-efficiency multi-phase VRMs demanding reliability and tunability.

Availability

TDA21103 is available at Aetrix Electronics and suitable for desktop CPU VRMs, server VRMs, Class-D audio amplifiers, and motor drive half-bridge circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TDA21103 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 AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global R&D and manufacturing infrastructure.

The CoreControl™ family-including the TDA21103-is engineered specifically for high-efficiency, high-density DC/DC conversion in computing and communications infrastructure, emphasizing gate drive precision, protection robustness, and thermal performance.

FAQ

What is the purpose of the PVCC pin on the TDA21103?

The PVCC pin sets the gate drive voltage for both high-side and low-side MOSFETs, adjustable from 6 V to 12 V. This allows designers to optimize the trade-off between MOSFET conduction losses (lower R_DS(on) at higher gate voltage) and gate drive losses (higher Q_g energy at higher voltage), especially critical in high-current VRM applications.

Does the TDA21103 require external bootstrap diodes?

No. The TDA21103 integrates a bootstrap diode for each channel, eliminating the need for external diodes in the bootstrap network. This reduces component count, PCB area, and potential failure points-particularly beneficial in dense multi-phase VRM layouts where layout parasitics impact reliability.

How does the TDA21103 prevent shoot-through in half-bridge operation?

The TDA21103 uses hardware-based adaptive gate drive control that dynamically inserts dead time between high-side and low-side gate signals. This prevents simultaneous conduction by ensuring one MOSFET is fully off before the other turns on, even under fast PWM transitions or mismatched propagation delays across channels.

Can the TDA21103 be used with 5 V PWM controllers?

Yes. Its PWM inputs are CMOS-compatible with logic thresholds of 1.26 V (low) and 3.7 V (high), and accept 0–5 V swing signals. It has been validated for interoperability with industry-standard PWM controllers including Intersil's HIP63xx series and Analog Devices' ADPxxxx families without level-shifting circuitry.