AL3158：LED Drivers for Displays / Backlights
| Part Number | Data Sheet | SPICE Model | Function | MinimumInput Voltage (V) | MaximumInput Voltage (V) | Maximum Output Voltage (V) | Number of Regulated Output Channels | Maximum Output Current per Channel (mA) | Typical Over-Current Protection Current (mA) | Switching Frequency (MHz) | Efficiency (%) | Quiescent Current (mA) | Standby Quiescent Current (µA) | SW RDS(ON) (Ω) | Dimming | OVP | Soft Start | VFB (V) | OperatingTemperatureRange (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AL3158 | AL3158.pdf | - | Charge Pump LED Driver | 2.7 | 5.5 | 5.5 | 9 | 30 | - | 1.2 | 93 | 2 | 1 | 0.5 | PWM | Yes | Yes | - | -40 to +85 |
Description
The AL3158 is a low noise, constant frequency charge pump DC/DC converter that uses a Dual mode load switch (1X), and (2X) conversion for white °C applications. The AL3158 is capable of driving three groups of three °C channels at 20mA from a 2.7V to 5.5V input. The current sinks may be operated using three simple PWM dimming inputs individually or in parallel for driving higher-current °Cs. Low external part counts (one 1µF flying capacitor and two 2.2µF capacitors at VIN and VOUT) make this part ideally suited for small, battery-powered applications. AL3158 enable inputs are used to enable, disable device and dim the °C current with a fixed DC current of 20mA. Each output of the AL3158 is equipped with built-in protection for VOUT short circuit and auto-disable for °C short conditions. Built-in soft-start circuitry prevents excessive inrush current during start-up and mode switching. A low-current shutdown feature disconnects the load from VIN to reduce quiescent current less than 1µA. The AL3158 is available in a lead-free, space-saving, thermally enhanced 20-pin 3 x 3mm QFN package.
Application
- Mobile Phone White LED Backlighting and Indicators
- RGB LED driving
- PDA White LED Backlighting
- Battery-operated Phone Main and Sub Screen White LED Backlighting
QFN3030-20
- AL3158.pdf AL3158
