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TPS75100DSKR Datasheet(PDF) 8 Page - Texas Instruments

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No. de pieza TPS75100DSKR
Descripción Electrónicos  Low Dropout, Two-Bank LED Driver With PWM Brightness Control
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS75100DSKR Datasheet(HTML) 8 Page - Texas Instruments

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Current
Reference
D1A
D2A
D1B
D2B
V
IN
ENB
GND
I
SET
ENA
ControlledCurrentSource
ControlledCurrentSource
ControlledCurrentSource
ControlledCurrentSource
Int/Ext
SetCurrent
Sense
Control
Logic
Control
Logic
800kW
1MW
8
TPS75100, TPS75103, TPS75105
SBVS080J – SEPTEMBER 2006 – REVISED NOVEMBER 2016
www.ti.com
Product Folder Links: TPS75100 TPS75103 TPS75105
Submit Documentation Feedback
Copyright © 2006–2016, Texas Instruments Incorporated
7 Detailed Description
7.1 Overview
The TPS7510x linear low dropout (LDO) matching LED current source is optimized for low-power keypad and
navigation pad LED backlighting applications. The device provides a constant current to up to four unmatched
LEDs organized in two banks of two LEDs each in a common-cathode topology. Brightness can be varied from
off to full brightness by inputting a pulse width modulation (PWM) signal on each enable pin (ENx, where x
indicates LED bank A or B). Each bank has independent enable and brightness control, but current matching is
done to all four channels concurrently. The input supply range is ideally suited for single-cell Li-Ion battery
supplies and the TPS7510x can provide up to 25 mA per LED.
7.2 Functional Block Diagram


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