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TPS7510X Datasheet(PDF) 1 Page - Texas Instruments

No. de pieza TPS7510X
Descripción Electrónicos  Low Dropout, Two-Bank LED Driver with PWM Brightness Control
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TPS7510X Datasheet(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION
APPLICATIONS
V
IN
ENA
D1A
D2A
D1B
D2B
ENB
V
ENA
V
ENB
I
SET
V
BATT
TPS7510x
A3
A2
A1
C3
C2
C1
B1
B3
B2
TPS7510xYFF
9-BallWCSP
(TopView)
TPS7510x
SBVS080C – SEPTEMBER 2006 – REVISED MARCH 2007
Low Dropout, Two-Bank LED Driver with PWM Brightness Control
• Regulated Output Current with 2%
The TPS7510x linear low dropout (LDO) matching
LED-to-LED Matching
LED current source is optimized for low power
keypad
and
navigation
pad
LED
backlighting
• Drives up to Four LEDs at 25mA Each in a
applications. The device provides a constant current
Common Cathode Topology
to up to four unmatched LEDs organized in two
• 28mV Typical Dropout Voltage Extends
banks of two LEDs each in a common-cathode
Usable Supply Range in Li-Ion Battery
topology. Without an external resistor, the current
Applications
source defaults to factory-programmable, preset
current level with
±0.5% accuracy (typical). An
• Brightness Control Using PWM Signals
optional external resistor can be used to set initial
• Two 2-LED Banks with Independent Enable
brightness to user-programmable values with higher
and PWM Brightness Control per Bank
accuracy. Brightness can be varied from off to full
• No Internal Switching Signals—Eliminates EMI
brightness by inputting a pulse width modulation
(PWM) signal on each Enable pin. Each bank has
• Default LED Current Eliminates External
independent enable and brightness control, but
Components
current matching is done to all four channels
Default values from 3mA to 10mA (in 1mA
concurrently. The input supply range is ideally suited
increments) available using innovative
for
single-cell
Li-Ion
battery
supplies
and
the
factory EEPROM programming
TPS7510x can provide up to 25mA per LED.
Optional external resistor can be used for
No internal switching signals are used, eliminating
high-accuracy, user-programmable current
troublesome electromagnetic interference (EMI). The
• Over-Current and Over-Temperature
TPS7510x is offered in an ultra-small, 9-ball, 0.4mm
Protection
ball-pitch wafer chip-scale package (WCSP) and a
3mm
× 3mm QFN package, yielding a very compact
• Available in Wafer Chip-Scale Package
total solution size ideal for mobile handsets and
portable backlighting applications. The device is fully
specified over TJ = –40°C to +85°C.
• Keypad and Display Backlighting
• White and Color LEDs
• Cellular Handsets
• PDAs and Smartphones
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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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