Texas Instruments UCC27201AD

Overview

UCC27201AD from Texas Instruments is a TTL-compatible, 120V half-bridge gate driver IC for high-frequency N-channel MOSFET control in high-side/low-side configurations. It delivers 3A source/sink output current, features an integrated 0.65Ω bootstrap diode, supports –18V negative HS voltage tolerance, and operates across –40°C to 150°C - enabling use in solar microinverters and telecom power supplies.

For engineers reviewing the UCC27201AD datasheet, UCC27201AD pinout, UCC27201AD application, or UCC27201AD equivalent, this page provides verified specifications including UVLO thresholds (VDD rising at 7.1V), propagation delay (22ns typ), rise/fall times (8ns/7ns @ 1000pF), delay matching (1ns), and thermal metrics for SOIC-8 (RθJA = 112.5°C/W).

Technical Context

The UCC27201AD implements independent CMOS/TTL-input logic with 2.3V/1.6V thresholds and 0.7V hysteresis, enabling direct interfacing with 3.3V/5V controllers without level-shifting circuitry. Its internal level-shift architecture ensures matched high-side/low-side timing, with <1ns delay skew between HO and LO transitions under load.

It integrates a monolithic bootstrap diode (VF = 0.65V @ 100μA, RD = 0.65Ω) rated for 120V HB–HS differential voltage and withstands –18V transient on HS. Undervoltage lockout acts independently on VDD (7.1V rising threshold, 0.5V hysteresis) and HB–HS (6.7V rising threshold, 0.4V hysteresis), forcing both outputs low during fault conditions.

Key Specifications

Pinout & Package

UCC27201AD is packaged in an 8-pin SOIC (D package), 4.9mm × 3.9mm body size, with pins arranged as shown below. The exposed thermal pad in DDA variant is electrically tied to VSS; standard D package has no thermal pad connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with UCC27201AD, UCC27200AD lacks TTL compatibility and requires higher input voltage swing, while IRS2004PBF trades integrated diode convenience for higher voltage headroom and external design flexibility - making UCC27201AD optimal for compact, 3.3V/5V-controlled, cost-sensitive half-bridge systems.

Availability

UCC27201AD is available at Aetrix Electronics and suitable for solar power optimizers, telecom power supplies, and online UPS systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for UCC27201AD 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

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management and high-reliability interface solutions.

The UCC27201AD belongs to TI's high-voltage gate driver product line, designed specifically for efficient, robust control of N-channel MOSFETs and IGBTs in isolated half-bridge and resonant converter topologies.

FAQ

What is the input logic compatibility of the UCC27201AD?

The UCC27201AD features TTL-compatible inputs with a typical high-threshold voltage of 2.3V and low-threshold voltage of 1.6V, plus 0.7V hysteresis. This allows direct interfacing with 3.3V and 5V microcontrollers and PWM controllers without external level-shifting circuitry. The UCC27201AD input structure also includes a 68kΩ internal pulldown resistor to VSS, ensuring defined logic states during power-up or floating conditions.

Does the UCC27201AD include an integrated bootstrap diode?

Yes, the UCC27201AD integrates a monolithic bootstrap diode with a typical forward voltage of 0.65V at 100μA and dynamic resistance of 0.65Ω. This eliminates the need for an external discrete diode in most half-bridge applications, reducing bill-of-materials count and PCB area. The diode is rated for 120V reverse voltage and supports fast recovery for high-frequency operation.

What is the maximum allowable voltage on the HS pin of the UCC27201AD?

The UCC27201AD supports a maximum DC voltage of +120V on the HS pin relative to VSS, and withstands transient negative voltages down to –18V (repetitive pulses <100ns). This capability enables reliable operation in high-bus applications such as solar microinverters and telecom rectifiers where fast switching induces large dV/dt-induced ringing on the switch node.

How does the UCC27201AD handle undervoltage lockout conditions?

The UCC27201AD implements independent undervoltage lockout (UVLO) circuits for both VDD and the HB–HS supply. VDD UVLO triggers at 7.1V rising and releases at 6.6V (0.5V hysteresis); HB–HS UVLO triggers at 6.7V rising and releases at 6.3V (0.4V hysteresis). When either condition is violated, both HO and LO outputs are forced low to prevent partial or erratic gate drive - a critical safety feature in high-power converters.

What package options are available for the UCC27201AD?

The UCC27201AD is offered in multiple packages, including SOIC-8 (D), PowerPAD™ SOIC-8 (DDA), VSON-8 (DRM), VSON-9 (DRC), and WSON-10 (DPR). The standard UCC27201AD part number corresponds to the SOIC-8 (D) package, 4.9mm × 3.9mm body size, with no exposed thermal pad. Thermal performance varies significantly across packages - RθJA is 112.5°C/W for SOIC-8 versus 44.8°C/W for DDA - so package selection must align with thermal requirements.