TI UCD90124 12路电源监测方案

TI 公司的UCD90124是 12路 PMBus/I2C可寻址的电源监测器，集成了可监测13路电源的电压，电流或温度输入的12位ADC，所有的电源400us取样一次，具有风扇控制和监测以及可闭环监测10个电源。器件内部有温度传感器，以及JTAG和 I2C/SMBus/PMBus接口，主要用在工业和自动测试设备（ATE）。本文介绍UCD90124主要特性，方框图，典型应用电路图以及UCD90120和UCD90124评估模块主要特性，方框图，详细电路和材料清单。

The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and system-health monitor. The device integrates a 12-bit ADC for monitoring up to 13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Twelve of these pins offer PWM functionality. Using these pins, the UCD90124 offers support for fan control, margining, and general-purpose PWM functions.
Fan-control signals can be sent using PMBus commands or generated from one of two built-in fan-control algorithms. PWM outputs combined with temperature and fan-speed measurements provide a complete fan-control solution for up to four independent fans.

UCD90124主要特性：
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