公开(公告)号：US20230135666A1

公开(公告)日：2023-05-04

申请号：US18062929

申请日：2022-12-07

申请人： STMicroelectronics S.r.I.

发明人： Maria Francesca Seminara ,  Salvatore Rosario Musumeci

IPC分类号： H05B45/397 ,  H05B45/14

摘要： An embodiment LED driver system comprises a power transistor configured to be selectively activated for generating a driving current for an array of LEDs, the power transistor having a first conduction terminal coupled to the array of LEDs and a second conduction terminal coupled to a reference resistor; an operational amplifier having a non-inverting input for receiving a reference voltage, an inverting input coupled to the second conduction terminal of the power transistor, and an output terminal coupled to a first conduction terminal of a transmission gate having a second conduction terminal coupled to a control terminal of the power transistor and a control terminal for receiving an enable signal; and a slew rate control unit configured to control the slew rate of the driving current.