Product details


Topology Current Source Vin (Min) (V) 4.5 Vin (Max) (V) 42 Vout (Min) (V) 0 Vout (Max) (V) 40 Iout (Max) (A) 0.5 Iq (Typ) (mA) 12 Operating temperature range (C) -40 to 105, -40 to 125 Features LED Open Detection, Thermal Shutdown open-in-new Find other Automotive LED drivers

Package | Pins | Size

TO-263 (KTT) 7 150 mm² 10 x 14.98 WSON (DRJ) 8 16 mm² 4 x 4 open-in-new Find other Automotive LED drivers


  • Qualified for Automotive Applications
  • AEC-Q100 Test Guidance With the Following Results:
    • Device Temperature Grade 2: –40°C to 105°C Ambient Operating Temperature Range for WSON package
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range for TO-263 package
    • Device HBM ESD Classification Level H1C
    • Device CDM ESD Classification Level C3B
  • Adjustable Constant Current up to 500 mA (±5%)
  • Wide Input-Voltage Range up to 42 V
  • Low Dropout Voltage
  • Open-Load Detection
  • Overtemperature Protection
  • Short-Circuit Proof
  • Reverse-Polarity Proof

All trademarks are the property of their respective owners.

open-in-new Find other Automotive LED drivers


The TL4242-Q1 device is an integrated adjustable constant-current source, driving loads up to 500 mA. One can adjust the output current level through an external resistor. The device design is for supplying high-power LEDs (for example, OSRAM Dragon LA W57B) under the severe conditions of automotive applications, resulting in constant brightness and extended LED lifetime. The device comes in the DRJ (WSON) and KTT (TO-263) package. Protection circuits prevent damage to the device in case of overload, short-circuit, reverse polarity, and overheat. The device provides the connected LEDs protection against reverse polarity as well as excess voltages up to 45 V.

The integrated PWM input of the TL4242-Q1 device permits LED brightness regulation by pulse-width modulation (PWM). The high-input impedance of the PWM input allows operating the LED driver as a protected high-side switch.

open-in-new Find other Automotive LED drivers
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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS92613-Q1 ACTIVE Automotive single-channel LED driver with 600mA output, open and short detection Higher output current up to 600mA/ch
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TPS92630-Q1 ACTIVE Automotive Three-channel Linear LED driver with Analog and PWM dimming This product is a 450mA single-channel LED driver in HTSSOP-14 package (TPS92610-Q1).
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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet TL4242-Q1 Adjustable LED Driver datasheet (Rev. G) Apr. 17, 2017
White paper LED Drivers for Automotive Exterior Applications (Rev. B) Mar. 27, 2018
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Application note How to Calculate TPS92630-Q1 Maximum Output Current for Automotive Exterior Ligh Dec. 22, 2015
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
Technical articles Solving the automotive EMI issues in new cars with all the screens Sep. 10, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

The TL4242EVM demonstrates the TL4242 IC configured to supply programmable constant current ≤500mA to LEDs on the output.
  • Adjustable Constant Current up to 500 mA (±5%)
  • Wide Input Voltage Range up to 42V
  • Low Drop Voltage
  • Open-Load Detection
  • Overtemperature Protection
  • Short-Circuit Proof
  • Reverse-Polarity Proof
  • Wide Temperature Range: –40°C to 150°C

Design tools & simulation

SLVM753.ZIP (12 KB) - TINA-TI Spice Model
SLVM754.TSC (35 KB) - TINA-TI Reference Design
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

11W Automotive LED Lighting Driver Reference Design
PMP20305 — PMP20305 is an LED driver circuit reference design using the LM5022-Q1 boost controller IC and two types of constant-current methods to drive 4 strings of LEDs. Two of the LED strings utilize the TL431 voltage reference as a driver to perform a constant current source, while the other two (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
DDPAK/TO-263 (KTT) 7 View options
SON (DRJ) 8 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

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