LP5522 Texas instruments

LP5522

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LP5522

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Описание

The LP5522 is a simple single wire programmable LED controller in six bump DSBGA package. It provides constant current flow through high side driver. Output current can be set from 1 mA to 20 mA by using an external resistor on the ISET pin. If no external resistor is used, output current is set to 5 mA default current. The LP5522 is controlled using only one signal. The signal controls either directly the LED driver or it launches previously programmed blinking sequence. The LP5522 works autonomously without a clock signal from the master device. Very low LED driver headroom voltage makes possible to use supply voltages close to LED forward voltage. Current consumption of the LP5522 is minimized when LED is turned off and once controller is disabled all supporting functions are also shut down. Very small DSBGA package together with minimum number of external components is a best fit for handheld devices.

Programmable Blinking Sequence
- 1 to 3 Programmable Pulses
- 1 ms to 255 ms LED on Time
- 10 ms to 2500 ms LED Off Time
- Single or Continuous Run of Programmed Blinking Sequence
Constant Current High Side Output Driver
Adjustable Current with External Resistor
0.2 µA Typical Shutdown Current
Autonomous Operation without External Clock
DSBGA-6 Package with 0.4 mm Pitch:
- 1.215 mm x 0.815 mm x 0.6 mm (LxWxH)

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Number of channels	1
LED current per channel (mA)	20
LED configuration	Single
Program memory	Yes
Topology	Linear
Programmable ramp control	No
Vin (min) (V)	2.7
Vin (max) (V)	5.5
Iout (max) (A)	0.02
Features	Constant current, GPIO interface
Iq (typ) (mA)	0.04
Shutdown current (ISD) (typ) (µA)	0.2
Operating temperature range (°C)	-30 to 85
Rating	Catalog