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A High-Voltage High-PSRR Power Management Circuit for BMS chip of new energy vehicle

机译:用于新能源汽车BMS芯片的高压高PSRR电源管理电路

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This paper presents a High-Voltage High-PSRR (HVHP) power management circuit used in high-precision battery parameters acquisition chip for Battery Management System for new energy vehicles. It consists of a pre-regulator, a high PSRR (power supply rejection ratio) self-regulated bandgap voltage reference (BGR), high voltage linear regulator, with the capability of soft start, over current detect, and power-on reset generation. The Power Management Circuit has been designed in ASMC's 0.5μm HV60 BCD automotive electronics technology. Post-layout simulation result shows it can work under input voltage from 5.5V to 40V, and deliver a current up to 20mA. BGR has a very high PSRR of -125dB@1KHz and with the regulated voltage -100dB@1KHz. This design is applicable for BMS chip and has already been taped out.
机译:本文提出了一种用于新能源汽车电池管理系统的高精度电池参数采集芯片的高压高PSRR(HVHP)电源管理电路。它由一个预调节器,一个高PSRR(电源抑制比)自调节带隙基准电压源(BGR),高压线性调节器组成,具有软启动,过电流检测和上电复位生成的能力。电源管理电路是采用ASMC的0.5μmHV60 BCD汽车电子技术设计的。布局后的仿真结果表明,它可以在5.5V至40V的输入电压下工作,并提供高达20mA的电流。 BGR具有-125dB @ 1KHz的非常高的PSRR,稳压电压为-100dB @ 1KHz。该设计适用于BMS芯片,并且已经被录音。

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