Texas Instruments UCC27523D

Overview

UCC27523D from Texas Instruments is a dual-channel, low-side gate driver IC designed to drive MOSFETs and IGBTs in high-frequency power stages. It delivers 5A peak source/sink current per channel, features 13ns typical propagation delay, 7ns/6ns rise/fall times, and operates from 4.5V to 18V supply across –40°C to 140°C - enabling robust GaN-based DC-DC converter designs.

For engineers reviewing the UCC27523D datasheet, UCC27523D pinout, UCC27523D application, or UCC27523D equivalent, key selection considerations include dual independent enable control (ENA/ENB), inverting-input-only logic configuration, rail-to-rail output swing, UVLO-protected glitch-free startup, and SOIC-8 package compatibility with industrial thermal requirements.

Technical Context

The UCC27523D implements two independent inverting gate-drive channels with TTL/CMOS-compatible input thresholds fixed at 1.2V (low) and 2.1V (high), independent of VDD. Its internal UVLO circuit holds both outputs low until VDD exceeds 4.2V (typ), ensuring safe power-up sequencing.

Each channel features matched propagation delays (1ns typical mismatch), fast switching (13ns t_D, 7ns t_R, 6ns t_F), and output stage pullup/pulldown resistances of 2.5–7.5Ω and 0.15–1Ω respectively - optimized for driving high-Q_G wide-bandgap devices with minimal shoot-through risk.

Key Specifications

Pinout & Package

UCC27523D is packaged in an 8-pin SOIC (D) with 4.90mm × 3.91mm body size and standard 1.27mm pitch. The exposed pad variant is not used for this specific part number; thermal dissipation relies on PCB copper area connected to GND via inner-layer vias.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side gate driver applications.

Compared with UCC27524D and UCC27525D, the UCC27523D provides consistent inverting behavior across both channels - simplifying firmware logic, eliminating external inverters, and ensuring symmetrical timing margins in synchronous rectifier or dual-active-bridge applications.

Availability

UCC27523D is available at Aetrix Electronics and suitable for switched-mode power supplies, DC-DC converters, and motor control systems requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.

Supply support for UCC27523D 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The UCC2752x product line was engineered specifically for high-efficiency, high-frequency power conversion - targeting GaN- and SiC-based SMPS, server VRMs, and renewable energy inverters demanding precise dual-channel timing and rugged gate drive.

FAQ

What logic configuration does the UCC27523D use for its input channels?

The UCC27523D uses dual inverting-input logic: OUTA is HIGH when INA is LOW (≤1.2V), and OUTB is HIGH when INB is LOW (≤1.2V). This matches common controller outputs for synchronous rectifiers and eliminates need for external inverters. The UCC27523D datasheet confirms this in Figure 5-1 and Table 5-1, specifying INA and INB as inverting inputs with hysteresis thresholds fixed independently of VDD.

Does the UCC27523D support parallel operation of its two output channels?

Yes, the UCC27523D supports parallel connection of OUTA and OUTB to deliver up to 10A peak drive current. Its matched propagation delays (1ns typical skew) and identical output impedance ensure balanced current sharing. TI's datasheet Section 3 explicitly states "Two outputs are in parallel for higher drive current," and Figure 7-1 shows symmetrical internal architecture enabling this configuration without added external components.

How does the UCC27523D behave during power-up and brown-out conditions?

The UCC27523D incorporates undervoltage lockout (UVLO) that holds both OUTA and OUTB LOW until VDD rises above 4.2V (typ), and maintains low state until VDD falls below 3.9V (typ) during power-down. This prevents partial gate drive and shoot-through in half-bridge circuits. Section 7.3.1 of the UCC27523D datasheet details this behavior, including hysteresis to reject supply noise during transient droops.

What is the maximum operating temperature range specified for the UCC27523D?

The UCC27523D is rated for operation from –40°C to 140°C junction temperature, validated across all electrical parameters in the datasheet's Recommended Operating Conditions (Section 6.3) and Thermal Information (Section 6.4). This extended range supports deployment in under-hood automotive modules, industrial motor drives, and high-density power supplies where ambient temperatures exceed 105°C.

Can the UCC27523D drive GaN power devices effectively?

Yes, the UCC27523D is explicitly designed for GaN power devices: its 5A peak current, 7ns rise time, 13ns propagation delay, and 4.5–18V supply range align with GaN HEMT gate requirements. Section 2 of the UCC27523D datasheet lists "Gate drive for emerging wide band-gap power devices such as GaN" as a primary application, and Section 7.3.1 notes low-voltage operation suitability for GaN bias architectures.