The PT4115 is a buck constant current source in continuous inductor current conduction mode, used to drive one or multiple series-connected LEDs. The PT4115 has a wide input voltage range, with a maximum output current of 1.2A. It supports analog dimming and PWM dimming, and has features such as high efficiency and LED open circuit protection.
The PT4115 is a high‑dimming‑ratio LED constant‑current driver that operates from an input voltage of 8 V to 30 V and can deliver up to 1.2 A of LED current. It features a DIM pin for analog and PWM dimming, over‑heat protection, and low standby current.
Typical applications include automotive LED strips, low‑voltage LED spotlights, and backup lighting. The device is supplied in an SOT‑89‑5 package and requires only a few external components such as an inductor and a current‑sense resistor. This manual is written in Chinese.
| Maximum output current | 1.2 A |
|---|---|
| Maximum switching frequency | 1 MHz |
| Overheat protection temperature | 160 °C |
| Package | SOT89-5 |
It can deliver up to 1.2 A of constant LED current.
Yes, it includes overheat protection that activates at 160 °C.