Overview
The STCS2SPR, produced by STMicroelectronics, is a BiCMOS constant current source designed to provide a precise constant current from a varying input voltage source. This device is aimed at replacing discrete component solutions for driving LEDs in low voltage applications such as 5 V, 12 V, or 24 V, offering benefits in terms of precision, integration, and reliability. It is particularly useful for LED constant current supplying, low voltage lighting, small appliances, and automotive LED lighting.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 40 | V |
| Output Current Range | 1 to 2000 | mA |
| Feedback Voltage (VFB) | 90 to 110 | mV |
| Quiescent Current (ICC) | 450 to 750 | µA (On Mode) |
| Dropout Voltage (VDROP) | 0.12 to 0.9 | V |
| Drain Leakage Current | 10 | µA (Shutdown) |
| Load Disconnection Threshold | 75 mV (Turn-ON), 110 mV (Turn-OFF) | mV |
| Junction Temperature Range | -40 to 150 | °C |
| Storage Temperature Range | -55 to 150 | °C |
| Package Type | PowerSO-10 |
Key Features
- Up to 40 V input voltage and up to 2 A output current.
- Less than 0.5 V voltage overhead.
- PWM dimming pin for adjustable brightness.
- Shutdown pin for power management.
- LED disconnection diagnostic feature with an open-drain output.
- High precision current regulation with ±10% accuracy.
- Thermal protection with shutdown at 155°C.
- Reverse polarity protection capability.
Applications
- LED constant current supplying for varying input voltages.
- Low voltage lighting systems.
- Small appliances LED lighting.
- Automotive LED lighting.
Q & A
- What is the input voltage range of the STCS2SPR?
The input voltage range is from 4.5 V to 40 V. - What is the maximum output current of the STCS2SPR?
The maximum output current is up to 2 A. - How is the current set in the STCS2SPR?
The current is set using an external resistor connected between the SOURCE and GND pins. - Does the STCS2SPR support PWM dimming?
Yes, it has a dedicated PWM dimming pin. - What is the purpose of the DISC pin in the STCS2SPR?
The DISC pin provides information on load disconnection conditions and is an open-drain output. - What are the thermal protection features of the STCS2SPR?
The device has thermal protection with shutdown at 155°C and hysteresis of 25°C. - How can the thermal performance of the STCS2SPR be improved?
Using large heat spreader areas, copper-filled through holes, and external heat sinks can improve thermal performance. - What is the package type of the STCS2SPR?
The package type is PowerSO-10. - Is the STCS2SPR protected against reverse polarity?
Yes, it must be protected from reverse connection of the supply voltage, and a small diode can be used for this purpose. - What are the storage temperature range and junction temperature range of the STCS2SPR?
The storage temperature range is -55°C to 150°C, and the junction temperature range is -40°C to 150°C.
