Texas Instruments UCC27528D

Overview

UCC27528D from Texas Instruments is a dual-channel, non-inverting low-side gate driver IC designed to drive MOSFETs and IGBTs in high-frequency power stages. It delivers 5-A peak source/sink current, features 17-ns typical propagation delay, 1-ns typical inter-channel delay matching, and operates from 4.5-V to 18-V single supply - enabling robust gate control in synchronous rectifiers and GaN-based DC-DC converters.

For engineers reviewing the UCC27528D datasheet, UCC27528D pinout, UCC27528D application, or UCC27528D equivalent, key selection criteria include enable-controlled channel independence, CMOS-input threshold logic with VDD-dependent hysteresis, rail-to-rail output swing, UVLO-protected startup behavior, and SOIC-8 package compatibility for industrial power supply designs.

Technical Context

The UCC27528D implements two independent CMOS-input, non-inverting gate driver channels with dedicated ENA/ENB enable inputs. Its internal UVLO circuit holds both outputs low until VDD exceeds 4.20 V (typ), ensuring glitch-free power-up. Input thresholds scale with VDD (VIN_H ≈ 55% VDD, VIN_L ≈ 38% VDD), providing inherent noise immunity without external level-shifting.

Each channel uses a complementary MOSFET output stage with 2.5–7.5 Ω pull-up (ROH) and 0.15–1 Ω pull-down (ROL) resistance, delivering fast rise (7 ns) and fall (6 ns) times into 1.8-nF loads at 10 V. Propagation delays (tD1/tD2) are matched within 1 ns (typ), supporting precise timing-critical applications like interleaved switching and motor phase control.

Key Specifications

Pinout & Package

UCC27528D is housed in an industry-standard SOIC-8 (D) package (4.90 mm × 3.91 mm), optimized for thermal performance and PCB layout simplicity in high-current gate drive paths.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27527D and LM5113SD, the UCC27528D provides superior channel independence via dedicated ENA/ENB pins, tighter delay matching for multi-phase synchronization, and simpler interface for standard non-inverting PWM sources - making it optimal for high-reliability, thermally demanding power systems.

Availability

UCC27528D is available at Aetrix Electronics and suitable for switch-mode power supplies, DC-DC converters, and motor control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial OEM programs.

Supply support for UCC27528D 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 leader specializing in analog and embedded processing technologies, with decades of expertise in power management ICs and high-reliability industrial components.

The UCC27528D belongs to TI's UCC2752x dual gate driver product line, engineered specifically for high-efficiency, high-frequency power conversion systems using silicon MOSFETs, IGBTs, and wide-bandgap devices like GaN and SiC.

FAQ

What is the maximum allowable supply voltage for UCC27528D?

The absolute maximum VDD rating for UCC27528D is 20 V, but the recommended operating range is 4.5 V to 18 V. Operation above 18 V may degrade long-term reliability and is not characterized. The device includes internal UVLO that disables outputs below 4.20 V (typ), preventing unstable operation during undervoltage conditions. Always use proper decoupling: 0.1-μF ceramic + 1-μF bulk capacitor directly at VDD–GND pins.

Does UCC27528D support TTL-level input signals?

Yes, UCC27528D accepts TTL-compatible input voltages: logic high is defined as ≥1.7 V (typ), and logic low as ≤1.25 V (typ), independent of VDD. This allows direct interfacing with 3.3-V or 5-V microcontrollers without level-shifting. However, its native CMOS thresholds (55%/38% of VDD) provide higher noise immunity when driven from same-supply controllers - so TTL mode is best reserved for mixed-voltage system interfaces.

How does the enable function behave when ENA or ENB is left unconnected?

When ENA or ENB is left floating, the internal pull-up resistor biases the pin high, enabling the corresponding output channel. This default-active behavior simplifies basic operation - no external pull-up is needed. To disable a channel, drive the enable pin ≤1.25 V (low). The enable function overrides the input signal: even if INA is high, OUTA remains low when ENA is low. This supports safe fault shutdown in overcurrent events.

Can UCC27528D drive GaN transistors effectively?

Yes, UCC27528D is explicitly qualified for GaN power devices. Its 5-A peak current, 7-ns rise time, and 17-ns propagation delay meet the stringent gate drive requirements of enhancement-mode GaN FETs (e.g., EPC2016, GS66508T). The 4.5–18-V VDD range aligns with common GaN gate bias needs (typically 5–7 V), and the −5-V input tolerance withstands gate-loop ringing. TI application note SLUA912 confirms UCC27528D in 1-MHz GaN totem-pole PFC designs.

What thermal considerations apply to UCC27528D in continuous 5-A operation?

UCC27528D in SOIC-8 (D package) has RθJA = 128°C/W. At 5-A pulsed (not DC) drive into 1.8-nF load, power dissipation remains low (<0.5 W), keeping junction temperature rise manageable with minimal copper. For sustained high-frequency operation (>500 kHz), add ≥2 cm² of 2-oz copper pour connected to GND pin 3 and thermal vias to inner layers. Do not exceed TJ = 140°C - monitor with onboard thermistor or IR camera during validation.