Datasheet > TPS92381PWPR

TPS92381PWPR

更新时间： 2024-11-26 02:52:23

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
39页	1796K
描述
TPS92380, TPS92381 45-V LED Backlight Driver with 3-, 4- Channels

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中文翻译

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TPS92381PWPR 数据手册

TPS92380, TPS92381

SNVSBZ6 – MAY 2021

TPS92380, TPS92381 45-V LED Backlight Driver with 3-, 4- Channels

1 Features

2 Applications

•

3-, 4-Channel 120-mA current sinks

– High dimming ratio of 10 000:1 at 100 Hz

– Current matching 1% (typical)

– LED String current up to 120 mA per channel

– Outputs can be combined externally for higher

current per string

Integrated boost and SEPIC converter for LED

string power

– Input voltage operating range 4.5 V to 40 V

– Output voltage up to 45 V

•

Industrial Backlight for medium-size panel

Consumer Backlight for medium-size panel

Industrial Illumination for LED panel

3 Description

The TPS92380, TPS92381 is a highly-integrated,

high output power, easy-to-use LED driver with DC-

DC converter. The DC-DC converter supports both

boost and SEPIC mode operation. The device has

four or three high-precision current sinks that can be

combined for higher current capability.

•

– Integrated 3.3-A switch FET

– Switching frequency 300 kHz to 2.2 MHz

– Switching synchronization input

– Spread spectrum for lower EMI

Fault detection and protection

The DC-DC converter has adaptive output voltage

control based on the LED forward voltages.

This feature minimizes the power consumption by

adjusting the voltage to the lowest sufficient level

in all conditions. For EMI reduction DC-DC supports

spread spectrum for switching frequency and an

external synchronization with dedicated pin. A wide-

range adjustable frequency allows the TPS9238x to

avoid disturbance for sensitive frequency band.

•

– Fault output

– Input voltage OVP, UVLO and OCP

– Boost block SW OVP and output OVP

– LED open and short fault detection

– Thermal shutdown

The input voltage range for the TPS9238x is from 4.5

V to 40 V . The TPS9238x integrates extensive fault

detection features.

Device Information⁽¹⁾

PART NUMBER

TPS92380

PACKAGE

BODY SIZE (NOM)

HTSSOP (20)

6.50 mm × 4.40 mm

TPS92381

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

the end of the data sheet.

V_IN

5...28 V

100

Up to 45V

C_OUT

C_IN

VIN

C_LDO

OUT1

LDO

TPS92381

OUT2

OUT3

R_FSET

V_IN= 16V

V_IN= 12V

FSET

V_IN= 8V

V_IN= 6V

SYNC

PWM

OUT4

ISET

BRIGHTNESS

160

240 320

Output Current (mA)

400

480

VDDIO/EN

FAULT

VDDIO/EN

FAULT

D000

LED Backlight Efficiency

VDDIO/EN

PGND GND PAD

R_ISET

Simplified 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...39

中文翻译

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