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UCC27444

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4-A dual-channel low-side gate driver with -5-V input capability

Product details

Number of channels 2 Power switch IGBT, MOSFET Peak output current (A) 4 Input supply voltage (min) (V) 4 Input supply voltage (max) (V) 18 Features Enable pin Operating temperature range (°C) -40 to 125 Fall time (ns) 7 Input threshold CMOS, TTL Channel input logic Non-Inverting Input negative voltage (V) -5 Rating Catalog Driver configuration Non-Inverting
Number of channels 2 Power switch IGBT, MOSFET Peak output current (A) 4 Input supply voltage (min) (V) 4 Input supply voltage (max) (V) 18 Features Enable pin Operating temperature range (°C) -40 to 125 Fall time (ns) 7 Input threshold CMOS, TTL Channel input logic Non-Inverting Input negative voltage (V) -5 Rating Catalog Driver configuration Non-Inverting
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Typical 4-A peak source and sink drive current for each channel
  • INA and INB input pins capable of handling –5 V
  • Absolute maximum VDD voltage 20 V
  • Wide VDD operating range from 4.5 V to 18 V
  • Two independent gate drive channels
  • Independent enable function for each output
  • Fast propagation delays (18-ns typical)
  • Fast rise and fall times (11-ns and 7-ns typical)
  • 1-ns typical delay matching between the two channels
  • SOIC8 and VSSOP8 PowerPAD™ package options
  • Operating junction temperature range of –40°C to 125°C
  • Typical 4-A peak source and sink drive current for each channel
  • INA and INB input pins capable of handling –5 V
  • Absolute maximum VDD voltage 20 V
  • Wide VDD operating range from 4.5 V to 18 V
  • Two independent gate drive channels
  • Independent enable function for each output
  • Fast propagation delays (18-ns typical)
  • Fast rise and fall times (11-ns and 7-ns typical)
  • 1-ns typical delay matching between the two channels
  • SOIC8 and VSSOP8 PowerPAD™ package options
  • Operating junction temperature range of –40°C to 125°C

The UCC27444 is a dual-channel, high-speed, low-side gate driver that effectively drives MOSFET and GaN power switches. UCC27444-Q1 has a typical peak drive strength of 4 A, which reduces rise and fall times of the power switches, lowers switching losses, and increases efficiency. The device’s fast propagation delay (18-ns typical) yields better power stage efficiency by improving the deadtime optimization, pulse width utilization, control loop response, and transient performance of the system.

The UCC27444 can handle –5 V at its INx inputs, which improves robustness in systems with moderate ground bouncing. The inputs can be connected to most controller outputs for maximum control flexibility. An independent enable signal allows the power stage to be controlled independently of main control logic. In the event of a system fault, the gate driver can quickly shut-off by pulling enable low. Many high-frequency switching power supplies exhibit noise at the gate of the power device, which can get injected into the output pin on the gate driver and can cause the driver to malfunction. The device’s transient reverse current and reverse voltage capability allow it to tolerate noise on the gate of the power device or pulse-transformer and avoid driver malfunction.

The UCC27444 also features low voltage operation and power on reset (POR) for improved system robustness. When there is not enough bias voltage to fully enhance the power device, the gate driver output is held low by the strong internal pull down MOSFET.

The UCC27444 is a dual-channel, high-speed, low-side gate driver that effectively drives MOSFET and GaN power switches. UCC27444-Q1 has a typical peak drive strength of 4 A, which reduces rise and fall times of the power switches, lowers switching losses, and increases efficiency. The device’s fast propagation delay (18-ns typical) yields better power stage efficiency by improving the deadtime optimization, pulse width utilization, control loop response, and transient performance of the system.

The UCC27444 can handle –5 V at its INx inputs, which improves robustness in systems with moderate ground bouncing. The inputs can be connected to most controller outputs for maximum control flexibility. An independent enable signal allows the power stage to be controlled independently of main control logic. In the event of a system fault, the gate driver can quickly shut-off by pulling enable low. Many high-frequency switching power supplies exhibit noise at the gate of the power device, which can get injected into the output pin on the gate driver and can cause the driver to malfunction. The device’s transient reverse current and reverse voltage capability allow it to tolerate noise on the gate of the power device or pulse-transformer and avoid driver malfunction.

The UCC27444 also features low voltage operation and power on reset (POR) for improved system robustness. When there is not enough bias voltage to fully enhance the power device, the gate driver output is held low by the strong internal pull down MOSFET.

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Technical documentation

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* Data sheet UCC27444 20-V, 4-A Dual-Channel Low-Side Gate Driver with –5-V Input Capability datasheet PDF | HTML 20 Jul 2023
Application note Why use a Gate Drive Transformer? PDF | HTML 04 Mar 2024

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Evaluation board

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The UCC2742xQ1 EVM is a high-speed dual MOSFET evaluation module that provides a test platform for a quick and easy startup of the UCC2742xQ1 driver. Powered by a single 4V to 15V external supply, and featuring a comprehensive set of test points and jumpers. All of the devices have separate input (...)
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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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SOIC (D) 8 Ultra Librarian

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