1 Features

• Dual independent inputs for high-side and low-side

drivers with interlock (UCC27834) or no interlock

(UCC27884)

• Maximum bootstrap voltage of +230V (HB pin)

• 8.5V to 20V VDD bias recommended range

• Peak output current of 3.5A source, 4A sink

• Fast propagation delay (29ns typical)

• Tight propagation delay matching between HO/LO

(<5ns max)

• dV/dt immunity of 100V/ns

• Low quiescent supply current draw of 150μA

(typical) on VDD and 90μA (typical) on HB

• Built-in 8V UVLO protection for both high and low

side channels

• Floating channel designed for bootstrap operation

• Available in standard SOIC-8 package

• All parameters specified over temperature range,

–40°C to +150°C

2 Applications

• Motor drive (stepper motors, fans, power tools,

robotics, drones, servos)

• E-bikes and E-scooters

• Solar boost and buck-boost MPPT

• Microinverters

3 Description

The UCC278X4 is a 230V half-bridge gate driver

with 3.5A source, 4A sink current, targeted to drive

power MOSFETs. The device consists of one groundreferenced

channel (LO) and one floating channel

(HO) which is designed to drive half-bridge configured

MOSFETs operating with bootstrap power supplies.

The device features fast propagation delays and

excellent delay matching between both channels.The

UCC278X4 allows a wide VDD operating voltage of

8.5V to 20V to support a wider range of gate voltage

drive, as well as UVLO protection for both the lowside

(VDD) and the high-side (HB) bias supplies.

The UCC27834 includes an interlock function option

to prevent both outputs from being turned on

simultaneously

The device features robust drive with excellent

noise and transient immunity including high dV/dt

tolerance (100V/ns), and wide negative transient

safe operating area (NTSOA) on the switch node

(HS). The UCC278X4 is available in the SOIC-8 pin

package and is rated to operate from –40°C to 150°C.