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PDF ET9364 Data sheet ( Hoja de datos )
| Número de pieza | ET9364 | |
| Descripción | High performance white LED driver | |
| Fabricantes | Etek Microelectronics | |
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General Description
The ET9364 is a high performance white LED driver. It integrates current sources and automatic mode selection charge
pump. The part maintains the high efficiency by utilizing an x1/x1.5 fractional charge pump and low dropout current
sources. The small equivalent x1 mode open loop resistance and ultralow dropout voltage of current source extend the
operating time of x1 mode and optimize the efficiency of Liion battery in white LED applications.
The ET9364 supports up to 4 white LEDs and regulates a constant current for uniform intensity. The part implements a 4
bit DAC for brightness control. Users can easily configure the LED current from 1.5mA to 25mA by a serial pulse. The
dimming of white LEDs current can be achieved by applying a pulse signal to the EN pin. There are totally 16 steps of
current could be set by users. The operating voltage range is 2.8V to 5.0V. Internal soft start circuitry effectively reduces
the inrush current while both startup and mode transition. The load is disconnected from VIN while shutdown and the
shutdown current is less than 1μA. ET9364 is available in a WQFN 3x316L package.
Features
85% Average Efficiency Over Battery Life
Support Up to 4 White LEDs
80mV Typical Current Source Dropout
1% Typical LED Current Accuracy
0.7% Typical LED Current Matching
Soft Start Function
Auto Charge Pump Mode Selection
250kHz Fixed Frequency Oscillator
Output Over Voltage Protection
16Step Brightness Control
Low Input Noise & EMI
Low 0.3μA Shutdown Current
RoHS Compliant and 100% Lead (Pb)Free
Applications
Mobile Phone, DSC, MP3
White LED Backlighting
LCD Display Supply
Pin Configuration
1 page | ||
| Páginas | Total 1 Páginas | |
| PDF Descargar | [ Datasheet ET9364.PDF ] | |
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