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See Technical Specifications

TPS61187RTJR

WLED driver for notebooks with PWM interface and Auto Phase Shift function

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TPS61187RTJR
Datasheet:

TPS61187RTJR 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 TPS61187RTJR

Email: [email protected]

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Tel: +852 95804164

TPS61187RTJR General Description

The TPS61187 device provides a highly integrated white-light-emitting-diode (WLED) driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2-A, 40-V 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.

The TPS61187 supports the automatic phase-shift-dimming method and direct-PWM-dimming method. During phase-shift-PWM dimming, the WLED current is turned on and turned 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 and/or turned off synchronized with the input PWM signal.

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

Key Features

Input Voltage 4.5 V to 24 V
Maximum Output Voltage 38 V
Integrated 2-A, 40-V MOSFET
Programmable Switching Frequency 300 kHz to 1 MHz
Adaptive Boost Output to WLED Voltages
Wide PWM Dimming Frequency Range
- 100 Hz to 50 KHz for Direct PWM Mode
- 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 Maximum
1.5% (Typical) Current Matching
PWM Brightness Interface Control
PWM Phase Shift Mode Brightness Dimming Method or Direct PWM Dimming Method
HBM ESD Protection 4 kV
Programmable Overvoltage Threshold
Built-in WLED Open/Short Protection
Thermal Shutdown

Specifications

Number of channels	6	Vin (min) (V)	5
Vin (max) (V)	24	Vout (min) (V)	5
Vout (max) (V)	40	Type	Inductive
Switching frequency (max) (kHz)	1000	Duty cycle (max) (%)	94
LED current per channel (mA)	30	Peak efficiency (%)	94
Topology	Boost	Features	Load Disconnect During Shutdown
Operating temperature range (°C)	-40 to 85	Rating	Catalog
feature-number-of-digits		feature-number-of-segments	60
feature-number-of-led-outputs		feature-topology
feature-process-technology		feature-input-output-type
feature-minimum-operating-supply-voltage-v	4.5	feature-maximum-operating-supply-voltage-v	24
feature-output-voltage-v	4.5 to 38	feature-maximum-supply-current-ua
feature-maximum-output-current-ma		feature-maximum-power-dissipation-mw
feature-packaging	Tape and Reel	feature-rad-hard
feature-pin-count	20	feature-cecc-qualified	No
feature-esd-protection		feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-auto-motive	No	feature-p-pap	No
feature-eccn-code	EAR99	feature-svhc	No
feature-svhc-exceeds-threshold	No