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See Technical Specifications

TPS61181ARTER

Six Strings LED driver for notebook application

Manufacturer:

TI
Mfr.Part #:

TPS61181ARTER
Datasheet:

TPS61181ARTER Datasheet (PDF)
Number of channels:

6
Vin (min) (V):

5
Vin (max) (V):

24
Vout (min) (V):

5
EDA/CAD Models:

Request Free CAD Models for TPS61181ARTER

Email: [email protected]

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Tel: +852 95804164

TPS61181ARTER General Description

The TPS61181A device provides highly integrated solutions for media-size LCD backlighting. The six current sink regulators provide high-precision current regulation and matching. In total, the device can support up to 60 WLEDs.

The devices support pulse width modulation (PWM) brightness dimming. During dimming, the WLED current is turned on/off at the duty cycle and frequency, determined by the PWM signal input to the DCRTL pin. The TPS61181A device is designed to minimize the output AC ripple across a wide dimming duty cycle and frequency range and also reduces the audible noise from the output ceramic capacitors.

The TPS61181A device provides a driver output for an external PFET connected between the input and inductor. During short circuit or overcurrent conditions, the device turns off the external PFET and disconnects the battery from the WLEDs. The PFET is also turned off during device shutdown (thereby giving shutdown) to prevent any leakage current from the battery. The device integrates overvoltage protection, soft-start and thermal shutdown and has a built-in linear regulator for the device supply.

For all available packages, see the orderable addendum at the end of the data sheet.

Key Features

4.5-V to 24-V Input Voltage
38-V Maximum Output Voltage
Integrated 1.5-A/40-V MOSFET
1-MHz Switching Frequency
Adaptive Boost Output to WLED Voltages
Small External Components
Integrated Loop Compensation
Six Current Sinks of 30 mA
Up to 10 WLED in Series
1% Typical Current Matching and Accuracy
Up to 1000:1 PWM Brightness Dimming
Minimized Output Ripple Under PWM Dimming
Driver for Input/Output Isolation PFET
True Shutdown
Overvoltage Protection
WLED Open and Short Protection
Built-in Soft Start

Specifications

Number of channels	6	Vin (min) (V)	5
Vin (max) (V)	24	Vout (min) (V)	5
Vout (max) (V)	39	Type	Inductive
Switching frequency (max) (kHz)	1000	Duty cycle (max) (%)	94
LED current per channel (mA)	30	Peak efficiency (%)	90
Topology	Boost	Features	Load Disconnect During Shutdown
Operating temperature range (°C)	-40 to 85	Rating	Catalog