TPS61043 - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

TPS61043
Manufacturer

TI
ChipWorker Part#

CW294640778
RoHS

Lead free / RoHS Compliant
Description

the tps61043 is a high frequency boost converter with constant current output that drives white leds or similar. the ...
Documentation

Datasheet

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TPS61043 Specifications

Attribute	Attribute Value

Part Number	TPS61043
Manufacturer	TI
ChipWorker Part#	CW294640778
Documentation	Datasheet
Case/Package	SON-8
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RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product 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.
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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