LEDs 已经成为主流的照明光源，因为它们在许多方面优于传统的白炽灯和霓虹灯。这些优势包括了: 效率更高、可靠性更好、寿命更长、尺寸更小和更快的开关能力。对于LED照明来说，定电流功率调节器是必需的。因为高功率LED的就算是输入电压增加10％，就可能造成LED电流加倍，而造成LED损坏的高风险。在选择LED照明驱动器时，选择适当功率拓扑线路和灵活的调光控制，这两个会是主要考虑因素。

TS19605CA20 是一款具有模拟和 PWM 调光控制功能的三通道线性 LED 驱动器。该器件针对汽车照明应用。以高侧驱动提供 LED 电流，每个通道配置的最大电流高达 150mA。通过串联外部 PNP 晶体管，每通道电流可达 400mA。TS19605CA20 可工作在 4.5V 至 70V 的宽输入范围，并且在待机模式下具有低静态电流。它设计有多种保护功能，例如欠电压锁定（UVLO）、LED-String开路负载电压保护（OLP）和短路保护（SCP）、ISET引脚开路/短路保护和过温度保护（OTP）。提供诊断功能以满足汽车要求。

LEDs have become the standard lighting source due to numerous advantages over traditional incandescent and arc-gas lamps. These advantages include higher efficiency, improved reliability, longer lifetimes, smaller sizes, and faster switching capabilities. For LED illumination, a constant-current regulator is essential. This is because the current of a high-power LED can double with just a 10% increase in voltage, posing a high risk of LED damage. When selecting LED illumination drivers, the topology of the power stage and flexible dimming control are two primary considerations.

TS19605CA20H is a three-channel Linear LED driver with analog and PWM dimming control. This device targets at automotive lighting applications. It provides high-side drivers for LED current configured with the maximum current up to 150mA per channel. By cascade external PNP transistor can reach up to 400mA per channel. TS19605CA20H operates with a wide input range of 4.5V to 70V and low quiescent current in standby mode. It is designed with various protection functions such as under voltage lockout (UVLO), LED-String open load voltage protection (OLP) and short circuit protection (SCP), ISET pin open/short protection and over-temperature protection (OTP). Diagnostic features are provided to meet automotive requirements.