Overview
The STLA02PUR, produced by STMicroelectronics, is a boost converter specifically designed for powering and controlling the current of white LEDs in LCD backlights. This device operates from an input voltage range of 2.5 V to 18 V and can provide an output voltage as high as 27 V. It is capable of driving up to 6 white LEDs connected in series with a total output current of up to 20 mA. The STLA02PUR features a high switching frequency of 2.3 MHz and includes various protection mechanisms such as overvoltage protection, chip overtemperature detection, and soft-start implementation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Operating Supply Voltage | 2.5 to 18 | V |
| Output Voltage Range | VIN + 1 to 27 | V |
| Output Current Capability | Up to 20 mA | mA |
| Output Power Capability | Up to 500 mW | mW |
| Switching Frequency | 2.3 MHz | MHz |
| PWM Dimming Range | 300:1 | |
| Integrated Switch Current | 350 mA | mA |
| Operating Ambient Temperature Range | -40 to 85 | °C |
| Junction Temperature Range | -40 to 150 | °C |
| Package Type | DFN6 (2 x 2 mm) |
Key Features
- Boost DC-DC converter for driving white LEDs in LCD backlights.
- Drives up to 6 LEDs connected in series with a total current up to 20 mA.
- PWM input for output current dimming with a 300:1 dimming range.
- Integrated 350 mA switch.
- Overvoltage protection and chip overtemperature detection.
- Soft-start implementation to prevent inrush current.
- High side sensing for simplified PCB layout.
Applications
- PDA and handheld devices.
- Cellular phones.
- MP3 players and other portable audio devices.
- Any application requiring efficient LED backlighting.
Q & A
- What is the input voltage range of the STLA02PUR?
The input voltage range is from 2.5 V to 18 V.
- How many white LEDs can the STLA02PUR drive in series?
It can drive up to 6 white LEDs connected in series.
- What is the maximum output current capability of the STLA02PUR?
The maximum output current capability is up to 20 mA.
- What is the switching frequency of the STLA02PUR?
The switching frequency is 2.3 MHz.
- Does the STLA02PUR support PWM dimming?
Yes, it supports PWM dimming with a 300:1 dimming range.
- What protection mechanisms are included in the STLA02PUR?
It includes overvoltage protection, chip overtemperature detection, and soft-start implementation.
- What is the package type of the STLA02PUR?
The package type is DFN6 (2 x 2 mm).
- What is the operating ambient temperature range of the STLA02PUR?
The operating ambient temperature range is from -40°C to 85°C.
- How does the STLA02PUR handle thermal shutdown?
The device has thermal shutdown protection with a threshold of 130°C to 150°C and a hysteresis of 15°C.
- What is the recommended frequency range for the PWM signal?
The recommended frequency range for the PWM signal is from 100 Hz to 1 kHz.
