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TPS75103

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low-dropout, two-bank LED driver with PWM brightness control

Product details

Number of channels 4 LED current per channel (mA) 25 LED configuration Parallel Program memory No Topology Linear Programmable ramp control No Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 0.025 Features Enable/Shutdown, GPIO interface, PWM control Iq (typ) (mA) 0.18 Shutdown current (ISD) (typ) (µA) 0.1 Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 4 LED current per channel (mA) 25 LED configuration Parallel Program memory No Topology Linear Programmable ramp control No Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 0.025 Features Enable/Shutdown, GPIO interface, PWM control Iq (typ) (mA) 0.18 Shutdown current (ISD) (typ) (µA) 0.1 Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YFF) 9 1.96000000000000028000000000000001 mm² 1.4000000000000001 x 1.4000000000000001
  • Regulated Output Current with 2% LED-to-LED Matching
  • Drives Up to Four LEDs at 25 mA Each in a Common Cathode Topology
  • 28-mV Typical Dropout Voltage Extends Usable Supply Range in Li-Ion Battery Applications
  • Brightness Control Using PWM Signals
  • Two 2-LED Banks With Independent Enable and PWM Brightness Control per Bank
  • No Internal Switching Signals—Eliminates EMI
  • Default LED Current Eliminates External Components
    • Default Values from 3 mA to 10 mA (in 1-mA Increments) Available Using Innovative Factory EEPROM Programming
    • Optional External Resistor can be Used for High-Accuracy, User-Programmable Current
  • Over current and Over temperature Protection
  • Available in Wafer Chip-Scale Package
    or 2.50-mm × 2.50-mm WSON-10
  • Regulated Output Current with 2% LED-to-LED Matching
  • Drives Up to Four LEDs at 25 mA Each in a Common Cathode Topology
  • 28-mV Typical Dropout Voltage Extends Usable Supply Range in Li-Ion Battery Applications
  • Brightness Control Using PWM Signals
  • Two 2-LED Banks With Independent Enable and PWM Brightness Control per Bank
  • No Internal Switching Signals—Eliminates EMI
  • Default LED Current Eliminates External Components
    • Default Values from 3 mA to 10 mA (in 1-mA Increments) Available Using Innovative Factory EEPROM Programming
    • Optional External Resistor can be Used for High-Accuracy, User-Programmable Current
  • Over current and Over temperature Protection
  • Available in Wafer Chip-Scale Package
    or 2.50-mm × 2.50-mm WSON-10

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. Without an external resistor, the current source defaults to a factory-programmable, preset current level with ±0.5% accuracy (typical). An optional external resistor can be used to set initial brightness to user-programmable values with higher accuracy. 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.

No internal switching signals are used, eliminating troublesome electromagnetic interference (EMI). The TPS7510x is offered in an ultra-small, 9-ball, 0.4-mm ball-pitch wafer chip-scale package (WCSP) and a 2.50-mm × 2.50-mm, 10-pin WSON package, yielding a very compact total solution size ideal for mobile handsets and portable backlighting applications. The device is fully specified over TJ = –40°C to +85°C.

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. Without an external resistor, the current source defaults to a factory-programmable, preset current level with ±0.5% accuracy (typical). An optional external resistor can be used to set initial brightness to user-programmable values with higher accuracy. 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.

No internal switching signals are used, eliminating troublesome electromagnetic interference (EMI). The TPS7510x is offered in an ultra-small, 9-ball, 0.4-mm ball-pitch wafer chip-scale package (WCSP) and a 2.50-mm × 2.50-mm, 10-pin WSON package, yielding a very compact total solution size ideal for mobile handsets and portable backlighting applications. The device is fully specified over TJ = –40°C to +85°C.

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Technical documentation

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Type Title Date
* Data sheet TPS7510x Low Dropout, Two-Bank LED Driver With PWM Brightness Control datasheet (Rev. J) PDF | HTML 18 Nov 2016
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 Aug 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 Aug 2017
Application note Linear Matched Independent Current Source vs Traditional WLED Driver Solutions 30 Mar 2007
Analog Design Journal LDO white-LED driver TPS7510x provides incredibly small solution size 14 Dec 2006

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