STMicroelectronics TD310IDT

Overview

TD310IDT from STMicroelectronics is a triple-channel IGBT/MOSFET driver with integrated current-sense comparator, uncommitted op-amp, and programmable UVLO/standby control. It delivers 0.6 A peak output per channel, operates from 4 V to 16 V single supply, and features low 7 Ω output impedance at 200 mA - enabling robust low-side and half-bridge switching in three-phase motor drives.

For engineers reviewing the TD310IDT datasheet, TD310IDT pinout, TD310IDT application, or TD310IDT equivalent, key selection considerations include its 600 ns sense-triggered output inhibition time, 1 MHz op-amp GBW, 20 ns inter-channel differential delay, and SO-16 package compatibility with pulse transformer drive and shunt-based current monitoring architectures.

Technical Context

The TD310IDT integrates three independent gate drivers with sourcing/sinking capability (Vsod ≤ 3 V, Vsid ≤ 5 V @ 200 mA), a fast current-sense comparator (tAi = 1 ms, Vshys = 40 mV), and a rail-to-rail input op-amp (Vicm = 0 to VCC−1.5 V, SR = 0.6 V/µs). Its logic inputs are CMOS/LSTTL-compatible with hysteresis and propagation delays under 400 ns.

UVLO threshold is externally adjustable via resistor divider on Pin 16, with default internal thresholds of 12 V (Vst1 = 10.7–13.3 V) and standby activation at 0.7/1.2 × VUVLO. Standby mode reduces ICC from 1.5 mA to 30 µA while forcing outputs low and disabling the op-amp.

Key Specifications

Pinout & Package

TD310IDT is housed in a 16-pin plastic SO (Small Outline) micropackage (SO-16), compliant with JEDEC MS-012, 3.9 mm body width, 1.27 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-channel gate driver with current sense applications.

Compared with IRS21844STRPBF and UCC27324DR, TD310IDT uniquely combines triple-channel drive, on-die current sensing, and configurable power management - reducing BOM count and PCB area in three-phase systems requiring embedded protection.

Availability

TD310IDT is available at Aetrix Electronics and suitable for three-phase motor drives, pulse transformer interfaces, and shunt-based current monitoring applications requiring stable component supply across industrial temperature ranges (−40°C to +125°C).

Supply support for TD310IDT 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

TD310IDT belongs to ST's Power Switch Drivers product line, engineered specifically for intelligent, protected gate driving in motor control and power conversion systems with integrated diagnostics and energy-aware operation.

FAQ

What is the maximum recommended external resistor value for UVLO adjustment?

STMicroelectronics recommends external resistor values not exceeding 10 kΩ for the UVLO divider network. Higher values interact with internal 140 kΩ and 1.26 MΩ resistors (±20% tolerance), causing threshold inaccuracy and instability. A 10 kΩ upper limit ensures predictable VUVLO setting and avoids noise sensitivity on Pin 16.

Can the op-amp be used in unity-gain buffer configuration?

Yes, the uncommitted op-amp supports unity-gain buffer operation with stable performance: it has 60 dB open-loop gain, 1 MHz GBW, and 0.6 V/µs slew rate. For rail-to-rail input and output swing, ensure load capacitance remains ≤100 pF and use proper decoupling (1 µF at VCC) to avoid oscillation in high-source-impedance configurations.

How does the TD310IDT behave when Enable is low and UVLO/Stby is high?

When Enable is low, all three outputs (OUTA/B/C) are forced low regardless of UVLO/Stby pin state or input logic levels. The op-amp remains active, and the alarm output reflects sense comparator status. This allows independent output disable while retaining diagnostic and signal-conditioning functions during controlled shutdown sequences.

Is channel paralleling supported across all three outputs simultaneously?

Channel paralleling is validated for any two outputs (e.g., OUTA + OUTB) to achieve >0.6 A peak drive, but ST does not characterize or guarantee safe operation when all three outputs are paralleled. Thermal and layout imbalance risks increase significantly beyond dual-channel pairing; design validation with thermal imaging and transient load testing is required for triple-output parallel use.