Datasheet > UCC28782CDRTWR

UCC28782CDRTWR

更新时间： 2024-09-21 02:50:11

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
98页	5231K
描述
UCC28782 High-Density Active-Clamp Flyback Controller with EMI Dithering, X-Cap Discharge, and Bias Power Management

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UCC28782CDRTWR 数据手册

UCC28782

SLUSDK4D – MAY 2020 – REVISED MAY 2021

UCC28782 High-Density Active-Clamp Flyback Controller with EMI Dithering, X-Cap

Discharge, and Bias Power Management

1 Features

3 Description

•

Active clamp recovers leakage inductance energy

Adaptive control for fast zero voltage switching

(ZVS) tracking and dead time optimization

Integrated switching bias regulator supports USB

Type-C^™PD wide output voltage range with one

auxiliary winding

EMI frequency dithering without trade-offs on

transient response or audible noise

Dynamic bias power management for digital

isolator and GaN driver

Programmable Adaptive Burst Mode (ABM) with

internal compensation

Active X-capacitor (X-cap) discharge

Over-temperature, over-voltage, output short-

circuit, over-current, over-power, and pin-fault

protections

The UCC28782 is a high-density active-clamp flyback

(ACF) controller for USB Type C™ PD applications

and allows for efficiencies over 93% by recovering the

leakage inductance energy and adaptive ZVS tracking

over the full load range.

•

With a maximum frequency of 1.5 MHz the magnetics

can be minimized. Frequency dithering helps to

improve EMI margin. The UCC28782 also integrates

dynamic bias power management to optimize the gate

drive for Si or GaN MOSFETs.

•

Adaptive Burst Mode (ABM) combined with Low

Power Mode (LPM) and Standby Power mode (SBP)

work together to increase light-load efficiency while

reducing ripple and audible noise.

•

The UCC28782 also integrates an X-Cap discharge

function to discharge the residual input voltage when

power is removed.

•

Auto-recovery and group-latch fault options with

fast latch-reset capability

4x4-mm 24-pin QFN package

The UCC28782 has multiple protection modes and

options for retry or latch-off responses depending on

the application needs. See Device Comparison Table.

Device Information⁽¹⁾

PART NUMBER

PACKAGE

BODY SIZE

UCC28782

WQFN-24

4.0 mm × 4.0 mm

2 Applications

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

•

High-density Type-C^™PD adapters for laptop,

tablet, TV, set-top box, and printer

USB power delivery and fast phone chargers

AC-to-DC or DC-to-DC auxiliary power supply

Audio soundbars and smart speakers

Battery chargers for power tools and E-bikes

USB wall outlets

•

V_OUT

C_X

GaN

Power IC

V_SW

Isolator

GaN

SR Controller

Power IC

LED lighting

P13

PGND

SWS

P13

UCC28782

AGND

XCD

REF

CC / CV

Controller

Simplified Typical Schematic

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...98

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