Infineon TLF30681QVS01汽车应用电源管理(PMIC)解决方案

Infineon公司的OPTIREG™ PMIC TLF30681QVS01是汽车应用的多轨电源管理集成电路(PMIC),最佳用于高级驾驶员辅助系统(ADAS).器件包括电池连接稳压器(Buck1),给外接负载和两个低压后稳压器提供3.3V.第一个后稳压器(Buck2)提供输出电压1.25V(输出电压通过SPI在0.9V到1.3V间调整).第二个后稳压器(Boost1)提供输出电压5.0V,给多达2个CAN收发器供电. TLF30681QVS01支持16位SPI和微控制器通信,SPI指令能从器件和电源稳压器的控制特性如PWM同步来读出状态信息.器件工作在通常的开关频率2.2MHz.开关频率可通过SPI从1.8MHz到2.5MHz间选择,每步为100kHz.开关稳压器能和外接时钟信号同步. TLF30681QVS01能提供同步信号,用于系统中的其它DC/DC稳压器.器件提供两个电压监测通路,监测输入和使能输出.监测通路能用来控制和监测外接LDO或外接DC/DC开关稳压器.高效降压预稳压器宽输入电压范围从3.7V到35V(有限时间为40V),适合于和陶瓷电容工作,高效降压后稳压器用产生第二个输出电压,降压后稳压器具有5V输出电压.器件具有可配置视窗看门狗.主要用在汽车电子, 高级驾驶员辅助系统(ADAS),77GHz雷达ECU,照相机ECU和人机接口(HMI)应用.本文介绍了TLF30681QVS01主要特性,框图, 时钟产生和时钟管理和功能框图Buck1, 和MCU间接口图,应用框图以及评估板TLF30681QVS01主要特性,电路图和PCB设计图.

The OPTIREG™ PMIC TLF30681QVS01 is a multiple rail Power Management IC (PMIC) for automotive applications, optimized for the use in Advanced Driver Assistance Systems (ADAS). The device consists of a battery connected buck regulator (Buck1) providing 3.3 V to external loads and to two low voltage postregulators.

The first post-regulator (Buck2) provides an output voltage of 1.25 V (output voltage adjustment via SPI in the range of 0.9 V to 1.3 V). The second post-regulator (Boost1) provides an output voltage of 5.0 V and is intended to supply up to two CAN transceivers. The TLF30681QVS01 supports 16-bit SPI communication to a microcontroller. SPI commands can read status information from the device and control features of the power

regulators, such as PWM synchronization. The device operates at a nominal switching frequency of 2.2 MHz. The switching ...