Texas Instruments UCC27289DRMR

Overview

UCC27289DRMR from Texas Instruments is a 3-A, 120-V half-bridge gate driver IC for N-channel MOSFETs in high-side/low-side configuration, featuring 16-ns typical propagation delay, ±3-A peak output current, 8-V typical UVLO, and integrated 100-V bootstrap diode. It operates across –40°C to 140°C junction temperature and supports solar microinverters and DC-input BLDC motor drives.

For engineers reviewing the UCC27289DRMR datasheet, UCC27289DRMR pinout, UCC27289DRMR application, or UCC27289DRMR equivalent, this page delivers verified technical context, package-specific pin functions, real-world switching performance metrics, thermal behavior in SON8, and validated alternative drivers for half-bridge power stage design.

Technical Context

The UCC27289DRMR implements independent TTL/CMOS-compatible HI and LI inputs with no built-in dead-time, enabling precise overlap control of HO and LO outputs. Its robust level shifter supports HS node operation up to 100 V referenced to VSS while maintaining 1-ns typical delay matching between channels.

UVLO protection is applied separately to VDD (7.0-V typical rising threshold) and HB–HS (6.3-V typical rising threshold), ensuring safe startup and fault response. The integrated bootstrap diode eliminates external diode requirements in most designs, reducing BOM count and PCB area in compact high-voltage converters.

Key Specifications

Pinout & Package

UCC27289DRMR is housed in an 8-pin SON package (4 mm × 4 mm, 0.5-mm pitch) with exposed thermal pad. Pin 1 is VDD; pins are arranged clockwise with VSS at pin 7 and HS at pin 4. Thermal pad must be electrically connected to VSS for optimal thermal performance (R_θJB = 19.2°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27289DRMR, UCC27282DRMR trades enable functionality and integrated bootstrap diode for lower cost, while LM5109BSDX/NOPB sacrifices peak current, package thermal performance, and negative voltage robustness for SOIC compatibility and simpler control interface.

Availability

UCC27289DRMR is available at Aetrix Electronics and suitable for solar microinverters, DC-input BLDC motor drives, and merchant telecom rectifiers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for UCC27289DRMR 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, embedded processing, and power management technologies, with decades of expertise in high-reliability gate drivers and power stage solutions.

The UCC27289 belongs to TI's high-voltage half-bridge driver product line, engineered for efficiency-critical, high-density power conversion in solar, server, and industrial motor control applications.

FAQ

What is the maximum allowable voltage on the HS pin of the UCC27289DRMR?

The UCC27289DRMR specifies a maximum DC voltage of +100 V and –10 V on the HS pin, with pulse ratings up to –14 V for durations under 100 ns. This rating enables use in 100-V-class half-bridge topologies while surviving transient undershoot during MOSFET switching. Exceeding these limits risks permanent damage to the internal level shifter and high-side driver stage of the UCC27289DRMR.

Does the UCC27289DRMR include an enable pin?

No, the UCC27289DRMR does not include an enable (EN) pin. That functionality is exclusive to the DRC (10-pin SON) variant. The UCC27289DRMR uses the same pinout as the DRM package, which omits EN - all inputs (HI, LI) are always active when VDD and HB–HS are within UVLO thresholds. This makes the UCC27289DRMR ideal for always-on, space-constrained applications where enable control is handled externally or not required.

What is the purpose of the integrated bootstrap diode in the UCC27289DRMR?

The integrated 100-V bootstrap diode in the UCC27289DRMR charges the external high-side bootstrap capacitor from the VDD rail during the low-side conduction period. This eliminates the need for an external discrete diode, reducing component count, PCB footprint, and parasitic inductance in the bootstrap loop. It directly contributes to higher reliability and simplified layout in compact 100-V half-bridge designs using the UCC27289DRMR.

How does the UCC27289DRMR handle negative voltage transients on its input pins?

The UCC27289DRMR supports –5 V absolute maximum on HI and LI pins, allowing it to withstand ground bounce and system-level noise without false triggering. This specification is verified per datasheet Section 6.1 Absolute Maximum Ratings and confirmed in typical characteristics (Figure 6-8). The feature enhances robustness in high-dV/dt environments such as BLDC motor drives, where the UCC27289DRMR maintains clean input interpretation despite transient excursions.

What thermal performance can be expected from the UCC27289DRMR in its SON8 package?

The UCC27289DRMR in SON8 (DRM) package achieves a junction-to-board thermal resistance (R_θJB) of 19.2°C/W when the thermal pad is properly soldered to a solid VSS copper plane. This value - documented in Section 6.4 Thermal Information - enables sustained 3-A peak output current operation at 140°C junction temperature in well-designed layouts, making the UCC27289DRMR suitable for thermally demanding server PSU and solar inverter applications.