Datasheet > TPS61187

TPS61187

更新时间： 2024-11-22 11:44:23

品牌	Logo	应用领域
德州仪器 - TI		驱动器电脑
页数	文件大小	规格书
25页	1600K
描述
WLED Driver for Notebooks with PWM Interface and Auto Phase Shift

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TPS61187 数据手册

TPS61187

www.ti.com

SLVSA85D –JUNE 2010–REVISED FEBRUARY 2012

WLED Driver for Notebooks with PWM Interface and Auto Phase Shift

Check for Samples: TPS61187

FEATURES

DESCRIPTION

The TPS61187 IC provides a highly integrated WLED

driver solution for notebook LCD backlight. This

device has a built-in high efficiency boost regulator

with integrated 2.0A /40V power MOSFET. The six

current sink regulators provide high precision current

regulation and matching. In total, the device can

support up to 60 WLEDs. In addition, the boost output

automatically adjusts its voltage to the WLED forward

voltage to optimize efficiency.

•

4.5 V to 24 V Input Voltage

38 V Maximum Output Voltage

Integrated 2 A 40 V MOSFET

300 kHz to 1 MHz Programmable Switching

Frequency

•

Adaptive Boost Output to WLED Voltages

Wide PWM Dimming Frequency Range

–

100 Hz to 50 KHz for Direct PWM Mode

The TPS61187 supports the auto phase shift

dimming method and direct PWM dimming method.

During phase shift PWM dimming, the WLED current

is turned on/off at the duty cycle controlled by the

input PWM signal and each channel is shifted

according to the frequency determined by an

integrated pulse width modulation (PWM) signal. The

frequency of this signal is resistor programmable,

while the duty cycle is controlled directly from an

external PWM signal input to the PWM pin. During

direct PWM dimming, the WLED current is turned

on/off synchronized with the input PWM signal.

100 Hz to 22 KHz for Frequency

Programmable Mode

•

100:1 Dimming Ratio at 20 kHz

10000:1 Dimming Ratio at 200 Hz (Direct PWM

mode)

•

Small External Components

Integrated Loop Compensation

Six Current Sinks of 30 mA Max

1.5% (Typ) Current Matching

PWM Brightness Interface Control

10uH

4.5V~24V

PWM Phase Shift Mode Brightness Dimming

Method or Direct PWM Dimming Method

4.7uF

2.2uF

Open

•

4 kV HBM ESD Protection

VIN

FAULT

Programmable Over Voltage Threshold

Built-in WLED Open/Short Protection

Thermal Shutdown

VDDIO

PGND

1.0 uF

1.2 KW

OVC

20 Lead 4mm × 4mm × 0.8 mm TQFN Package

FSLCT

499 KW

TPS61187

10 KW

APPLICATIONS

19.8 mA

PWM

ISET

IFB1

IFB2

IFB3

IFB4

IFB5

IFB6

VDD_GPIO

•

Notebook LCD Display Backlight

62 KW

Open

FPO

RFPWM

/MODE

AGND

9.09 KW

Figure 1. Typical Application – Phase Shift PWM

Mode

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...25

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与TPS61187相关器件

型号	品牌	获取价格	描述	数据表
TPS61187RTJ	TI	获取价格	WLED Driver for Notebooks with PWM Interface and Auto Phase Shift
TPS61187RTJR	TI	获取价格	WLED Driver for Notebooks with PWM Interface and Auto Phase Shift
TPS61187RTJT	TI	获取价格	WLED Driver for Notebooks with PWM Interface and Auto Phase Shift
TPS61193	TI	获取价格	低 EMI、高性能 3 通道 LED 驱动器
TPS61193PWPR	TI	获取价格	低 EMI、高性能 3 通道 LED 驱动器 \| PWP \| 20 \| -40 to 85
TPS61193PWPRQ1	TI	获取价格	适用于汽车照明的低 EMI、高性能 3 通道 LED 驱动器 \| PWP \| 20 \| -
TPS61193-Q1	TI	获取价格	适用于汽车照明的低 EMI、高性能 3 通道 LED 驱动器
TPS61194	TI	获取价格	低 EMI、高性能 4 通道 LED 驱动器
TPS61194PWPR	TI	获取价格	低 EMI、高性能 4 通道 LED 驱动器 \| PWP \| 20 \| -40 to 85
TPS61194PWPRQ1	TI	获取价格	适用于汽车照明的低 EMI、高性能 4 通道 LED 驱动器 \| PWP \| 20 \| -

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