(China (Mainland))
Product Summary
The TPS61043DRBRG4 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 (typ). To control LED brightness, the LED current of TPS61043DRBRG4 can be pulsed by apply-ing a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). The applications of the TPS61043DRBRG4 include White LED Supply for Display Backlight/Sidelight in PDA, Pocket PC, Smart Phones, Handheld Devices, Cellular Phones.
Parametrics
TPS61043DRBRG4 absolute maximum ratings: (1)Supply Voltages, v(VIN): -0.3 V to 7 V; (2)Voltages, V(Rs), V(CTRL), V(FB): -0.3 V to Vin + 0.3 V; (3)Voltages, V(SW), V(LED): 30 V; (4)Voltage, V(OVP): 30 V; (5)Operating junction temperature range: -40℃ to 150℃; (6)Storage temperature range, TSTG: -65℃ to 150℃; (7)Lead temperature (soldering, 10 sec): 260℃.
Features
TPS61043DRBRG4 features: (1)Current Source with 18 V Overvoltage Protection; (2)Powers Up to 4 LEDs in Series; (3)Input Voltage Range: 1.8 V to 6.0 V; (4)Internal 30 V Switch; (5)Up to 85% Efficiency; (6)Precise Brightness Control Using PWM Signal or Analog Signal; (7)Switching Frequency: Up to 1 MHz; (8)Internal Power MOSFET Switch: 400 mA; (9)Operates With Small Output Capacitors Down to 100 nF; (10)Disconnects LEDs During Shutdown; (11)No Load Quiescent Current: 38 μA Typ; (12)Shutdown Current: 0.1 μA Typ; (13)Available in a Small 3 mm × 3 mm QFN Package.
Diagrams
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 TPS61043DRBRG4 |
Texas Instruments |
LED Lighting Drivers TPS61043: Const Crnt LED Driver |
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