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LP3943ISQ/NOPB

Led Driver, 16 Outputs, Boost (Step Up), 2.3V-5.5V in, 400kHz switch,25mA out, WQFN-24

TEXAS INSTRUMENTS LP3943ISQ/NOPB

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Manufacturer Part No:
LP3943ISQ/NOPB
Order Code:
3119165

Product Information

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:
Boost (Step Up)

:
2.3V

:
5.5V

:
5.5V

:
200mA

:
400kHz

:
16Outputs

:
SMD

:
WQFN

:
24Pins

:
-40°C

:
85°C

:
-

:
-

:
MSL 1 - Unlimited
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Technical Docs (0)

Product Overview

The LP3943ISQ/NOPB is a 16-output LED Fun Light Driver for use with general purpose I/O expander. This device also contains an internal precision oscillator that provides all the necessary timing required for driving each LED. Two prescaler registers, along with two PWM registers, provide a versatile duty-cycle control. It contains the ability to dim LEDs in SMBUS/I²C applications where it is required, to cut down on bus traffic. Traditionally, dimming LEDs using a serial shift register such as 74LS594/5 requires a large amount of traffic on the serial bus. The LP3943 instead requires only the setup of the frequency and duty cycle for each output pin, from then on, only a single command from the host is required to turn each individual open drain output to an on or off state or to cycle a programmed frequency and duty cycle. Any ports not used for controlling the LEDs can be used for general purpose input/output expansion.
  • Internal power-ON reset
  • Active low reset
  • Internal precision oscillator
  • Variable dim rate (from 6.25ms to 1.6s, 160 to 0.625Hz)
  • 16 LED drivers (multiple programmable states - on, off, input and dimming at a specified rate)
  • 16 Open-drain outputs capable of driving up to 25mA per LED
  • Green product and no Sb/Br

Applications

LED Lighting, Portable Devices, Consumer Electronics, Lighting

Packaging type Cut Tape

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359 available for 5 - 8 business days delivery

$3.26 ( $3.75  Inc. GST)

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