STCS1 is a BiCMOS constant current source designed to provide a precise constant current starting from a varying input voltage source. The main target is to replace discrete components solution for driving LEDs in low voltage applications such as 5V, 12V or 24V, giving benefits in terms of precision, integration, and reliability.
The STCS1 is a BiCMOS constant current source designed to drive LEDs with varying input voltages ranging from 4.5 V to 40 V. It is intended to replace discrete component solutions in low voltage applications such as 5 V, 12 V, or 24 V systems, offering benefits in precision, integration, and reliability. The device sets the current using an external resistor with a precision of ±10% and supports output currents up to 1.5 A.
| Supply voltage range | 4.5 to 40 V |
|---|---|
| Output current range | 1 to 1500 mA |
| Feedback voltage | 90 to 110 mV |
| Quiescent current (On Mode) | 450 to 750 µA |
| Dropout voltage (100 mA) | 0.12 to 0.16 V |
| Dropout voltage (1.5 A) | 0.58 to 0.9 V |
| Thermal shutdown temperature | 155 °C |
The current is set with an external sensing resistor connected to the FB pin, where the feedback voltage is 100 mV.
The device supports an output current range of 1 to 1500 mA.
If the voltage at the DRAIN pin is lower than 75 mV, the DISC pin is pulled low to indicate load disconnection.
A typical frequency range for the PWM input is from a few hertz to 50 kHz.