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UCC21551
  • UCC21551
  • UCC21551
  • UCC21551

UCC21551

ACTIVE

4A/6A 5kVRMS dual-channel isolated gate driver with EN and DT pins for IGBT and SiC

Texas Instruments UCC21551 Product Info

1 April 2026 3

Parameters

Number of channels

2

Power switch

IGBT, MOSFET, SiCFET

Withstand isolation voltage (VISO) (Vrms)

5000

Working isolation voltage (VIOWM) (Vrms)

1500

Peak output current (A)

6

Peak output current (source) (typ) (A)

4

Peak output current (sink) (typ) (A)

6

Features

Programmable dead time

Output VCC/VDD (min) (V)

13

Output VCC/VDD (max) (V)

25

Input supply voltage (min) (V)

3

Input supply voltage (max) (V)

5.5

Propagation delay time (µs)

0.028

Input threshold

CMOS

Operating temperature range (°C)

-40 to 150

Rating

Catalog

Rise time (ns)

8

Fall time (ns)

8

Undervoltage lockout (typ) (V)

5, 8, 12, 17

TI functional safety category

Functional Safety-Capable

Package

SOIC (DW)-16-106.09 mm² 10.3 x 10.3

Features

  • Universal: dual low-side, dual high-side or half-bridge driver
  • Junction temperature range –40 to +150°C
  • Up to 4A peak source and 6A peak sink output
  • Common-mode transient immunity (CMTI) greater than 125V/ns
  • Up to 25V VDD output drive supply
    • 5V,8V, 12V and 17V VDD UVLO options
  • Switching parameters:
    • 33ns typical propagation delay
    • 5ns maximum pulse-width distortion
    • 10µs maximum VDD power-up delay
  • UVLO protection for all power supplies
  • Fast enable for power sequencing
  • Universal: dual low-side, dual high-side or half-bridge driver
  • Junction temperature range –40 to +150°C
  • Up to 4A peak source and 6A peak sink output
  • Common-mode transient immunity (CMTI) greater than 125V/ns
  • Up to 25V VDD output drive supply
    • 5V,8V, 12V and 17V VDD UVLO options
  • Switching parameters:
    • 33ns typical propagation delay
    • 5ns maximum pulse-width distortion
    • 10µs maximum VDD power-up delay
  • UVLO protection for all power supplies
  • Fast enable for power sequencing

Description

The UCC21551x is an isolated dual channel gate driver family with programmable dead time and wide temperature range. It is designed with 4A peak-source and 6A peak-sink current to drive power MOSFET, SiC, and IGBT transistors.

The UCC21551x can be configured as two low-side drivers, two high-side drivers, or a half-bridge driver. The input side is isolated from the two output drivers by a 5kVRMS isolation barrier, with a minimum of 125V/ns common-mode transient immunity (CMTI).

Protection features include: resistor programmable dead time, disable feature to shut down both outputs simultaneously, and integrated de-glitch filter that rejects input transients shorter than 5ns. All supplies have UVLO protection.

With all these advanced features, the UCC21551x device enables high efficiency, high power density, and robustness in a wide variety of power applications.

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