UCC27624DGNR中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

1 Features

? Typical 5-A peak source and sink drive current for

each channel

? Input and enable pins capable of handling –10 V

? Output capable of handling –2-V transients

? Absolute maximum VDD voltage: 30 V

? Wide VDD operating range from 4.5 V to 26 V with

UVLO

? Two independent gate drive channels

? Independent enable function for each output

? Hysteretic-logic thresholds for high noise immunity

? VDD independent input thresholds (TTL

compatible)

? Fast propagation delays (17-ns typical)

? Fast rise and fall times (3.5-ns and 6-ns typical)

? 1-ns typical delay matching between the two

channels

? Two channels can be paralleled for higher drive

current

? SOIC8 and VSSOP8 PowerPAD? package

options

? Operating junction temperature range of –40°C to

150°C

2 Applications

? Switched-mode power supplies (SMPS)

? Power factor correction (PFC) circuits

? DC/DC Converter

? Motor drives

? Solar power supplies

? Pulse transformer driver

3 Description

The UCC27624 is a dual-channel, high-speed, lowside

gate driver that effectively drives MOSFET,

IGBT, SiC, and GaN power switches. UCC27624

has a typical peak drive strength of 5 A, which

reduces rise and fall times of the power switches,

lowers switching losses, and increases efficiency. The

UCC27624's fast propagation delay (17-ns typical)

yields better power stage efficiency by improving the

deadtime optimization, pulse width utilization, control

loop response, and transient performance of the

system.

UCC27624 can handle –10 V at its inputs, which

improves robustness in systems with moderate

ground bouncing. The inputs are independent of

supply voltage and 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 UCC27624'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 UCC27624 also features undervoltage lockout

(UVLO) 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.