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Product details

Parameters

Channels (#) 1 Vin (Min) (V) 1.8 Vin (Max) (V) 6 Type Inductive Switching frequency (Max) (kHz) 1000 LED current per channel (mA) 50 Peak efficiency (%) 85 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (C) -40 to 85 open-in-new Find other Backlight LED drivers

Package | Pins | Size

VSON (DRB) 8 9 mm² 3.0 x 3.0 open-in-new Find other Backlight LED drivers

Features

  • Current Source With 18-V Overvoltage Protection
  • Powers up to 4 LEDs in Series
  • Input Voltage Range: 1.8 V to 6 V
  • Internal 30-V Switch
  • Up to 85% Efficiency
  • Precise Brightness Control Using PWM Signal or
    Analog Signal
  • Switching Frequency up to 1 MHz
  • Internal Power MOSFET Switch 400 mA
  • Operates With Small Output Capacitors Down to
    100 nF
  • Disconnects LEDs During Shutdown
  • No Load Quiescent Current 38 µA Typical
  • Shutdown Current 0.1 µA Typical
  • Available in a Small 3-mm × 3-mm QFN Package
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Description

The TPS61043 is a high-frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (RS) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor RS to 252 mV (typical). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). To allow higher flexibility, the device can be configured so that the brightness is controlled by an analog signal as well, as described in Application Information. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground. For maximum safety during operation, the output has integrated overvoltage protection that prevents damage to the device by limiting the output voltage to typically 18 V in case of a high-impedance output (for example, faulty LED). The TPS61043 device provides a solution for applications where higher LED currents or more than four LEDs in series must be powered.

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Technical documentation

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Type Title Date
* Data sheet TPS61043 Constant Current LED Driver datasheet (Rev. C) Feb. 02, 2016
White paper Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Technical article Overcoming challenges for backlight LED drivers in automotive display solutions Jul. 16, 2020
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) Nov. 29, 2017
Application note Extending the Soft Start Time Without a Soft Start Pin (Rev. B) Jun. 15, 2017
Technical article Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical article LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical article Take better selfies with innovative LED flashes Nov. 18, 2014
Application note Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
Application note IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011

Design & development

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SON (DRB) 8 View options

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