STMicroelectronics TD351ID

Overview

TD351ID from STMicroelectronics is an advanced high-side IGBT and power MOSFET gate driver in SO-8 package, featuring 1.7 A sink / 1.3 A source peak output current, active Miller clamp, two-level turn-off with adjustable delay, UVLO protection, and 2 kV HBM ESD rating. It enables robust 1200 V three-phase inverter designs using bootstrap supply without negative rail.

For engineers reviewing the TD351ID datasheet, TD351ID pinout, TD351ID application, or TD351ID equivalent, this page delivers verified functional context, validated pin roles, real-world timing behavior (tdon ≤ 2.2 ns, ∆tw ≤ 100 ns), and precise alternative selection guidance for motor control and UPS gate drive systems.

Technical Context

The TD351ID implements edge-triggered input logic compatible with optocouplers and pulse transformers, with internal 5 V reference (±1.5% tolerance) used for both turn-on delay and two-level turn-off timing. Its active Miller clamp activates below 2.0 V at CLAMP pin to suppress gate voltage spikes during IGBT off-state.

Two-level turn-off uses external Rd/Cd network to set programmable delay Ta ≈ 0.7·Rd·Cd (kΩ·nF), applied identically at turn-on to prevent pulse width distortion. Output stage sustains ≥1.0 A sink / ≥0.75 A source across –40°C to +125°C, optimized for Miller plateau region operation.

Key Specifications

Pinout & Package

TD351ID is housed in a standard SO-8 surface-mount package (ECOPACK® compliant), with 1.27 mm pitch, 4.8–5.0 mm body width, and thermal resistance RthJA = 150 °C/W. Pin 1 is marked by notch or dot; top view orientation follows JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar IGBT gate driver applications.

Compared with IR2110PbF and UCC27531DR, TD351ID uniquely integrates active Miller clamp and programmable two-level turn-off in a single SO-8 package with single-supply operation - making it the only option among the three that enables robust, compact 1200 V inverter designs without negative rails or external protection ICs.

Availability

TD351ID is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies (UPS), renewable energy inverters, and electric vehicle traction converters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TD351ID 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and power management applications with emphasis on reliability and energy efficiency.

TD351ID belongs to ST's high-voltage gate driver product line, engineered specifically for robust, single-supply IGBT and MOSFET control in 1200 V industrial inverters - prioritizing Miller immunity, short-circuit protection, and thermal resilience.

FAQ

What is the purpose of the CLAMP pin on TD351ID?

The CLAMP pin provides active Miller current control by establishing a low-impedance path from IGBT gate to emitter when gate voltage falls below 2.0 V relative to VL. This suppresses gate voltage spikes during high dv/dt switching, eliminating the need for negative gate drive in most 1200 V inverter applications and enabling simpler bootstrap supply architectures.

How is the two-level turn-off delay adjusted on TD351ID?

The two-level turn-off delay (Ta) is set using an external resistor (Rd) between CD and VH, and an external capacitor (Cd) between CD and VL. The delay follows Ta ≈ 0.7 × Rd(kΩ) × Cd(nF) microseconds. For example, Rd = 10 kΩ and Cd = 100 nF yields Ta ≈ 700 ns, providing controlled current decay before final turn-off under overcurrent conditions.

Can TD351ID drive both IGBTs and MOSFETs?

Yes, TD351ID is explicitly qualified for both IGBTs and power MOSFETs. Its 1.7 A sink / 1.3 A source capability targets the Miller plateau region common to both device types, and its active Miller clamp function addresses gate oscillation issues prevalent in high-voltage IGBTs while remaining beneficial for fast-switching SiC MOSFETs in hard-switched topologies.

What is the minimum recommended decoupling capacitance on the VREF pin?

A minimum 10 nF ceramic capacitor is required on the VREF pin, placed as close as possible to the pin with short traces. ST specifies a recommended range of 10–100 nF to ensure stable timing accuracy and effective high-frequency noise rejection for both the turn-on delay and two-level turn-off functions, especially in electrically noisy motor drive environments.