STCS05 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 STCS05 is a BiCMOS constant current source designed to provide precise current from varying input voltage sources, targeting low voltage applications like 5V, 12V, or 24V. It replaces discrete component solutions to drive LEDs with benefits in precision, integration, and reliability. The device features a dedicated pin for PWM dimming and an open-drain output for load disconnection diagnostics.
| Output current | Up to 0.5 A |
|---|---|
| Input voltage | 4.5 V to 40 V |
| Voltage overhead | Less than 0.5 V |
| Current precision | ±10% |
| Package | SO-8 |
| 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.
When the enable pin is low, the device turns off completely, reducing current consumption to less than 1 µA.
The device detects LED string disconnection by monitoring the DRAIN pin; if VDRAIN is lower than 75 mV, the DISC pin is pulled low.