UCC21521DWR Description

The UCC21521 is an isolated dual-channel gate driver with peak currents of 4 A for the source and 6 A for the sink. With best-in-class propagation delay and pulse-width distortion, it is made to drive power MOSFETs, IGBTs, and SiC MOSFETs up to 5-MHz.

A 5.7-kVRMS reinforced isolation barrier with a minimum of 100-V/ns common-mode transient immunity separates the input side from the two output drivers (CMTI). A working voltage of up to 1500 VDC is permitted between the two secondary-side drivers due to internal functional isolation.

Each driver can be set up as a half-bridge driver with programmable dead time, two low-side drivers, two high-side drivers, or any combination of these (DT). When the EN pin is pulled low, both outputs are switched off simultaneously, but when it is left open or pulled high, normal functioning is possible.

UCC21521DWR Features

Common-mode transient immunity (CMTI) greater than 100 V/ns

Surge immunity up to 12.8 kV

Isolation barrier life >40 years

4-A peak source, 6-A peak sink output

TTL and CMOS compatible inputs

3-V to 18-V input VCCI range to interface with both digital and analog controllers

Up to 25-V VDD output drive supply

– 5-V, 8-V, 12-V VDD UVLO options

Programmable overlap and dead time

Rejects input pulses and noise transients shorter than 5 ns

Fast enable for power sequencing

Wide body SOIC-16 (DW) package

UCC21521DWR Applications

Isolated converters in offline AC-to-DC power supplies

Server, telecom, IT, and industrial infrastructures

Motor drive and DC-to-AC solar inverters

LED lighting

Inductive heating

Uninterruptible power supply (UPS)