PX3544,, - 中电华星

PX3544

产品简介：
GPU Power PX3544,主要用于NVIDIA的G92，初定名称为GeForce 8800GT显卡主供电控制芯片
产品详细：

GPU Power PX3544,主要用于NVIDIA的G92，初定名称为GeForce 8800GT显卡主供电控制芯片.

这是位于显卡背面的主供电控制芯片，型号是Primarion PX3544，这是图形处理器专用的数字多相PWM控制器，可以同时使用三路12V（二路冗余）输入，最多提供四路输出，可以达到130A的电流。PX3544还具备了标准的I2C总线接口，可以提供实时的监测和控制

The PX354x Graphics Processor Multiphase Digital Controller provides core power for today’s high current graphic processors by driving up to six synchronous-rectified buck-converter channels in parallel. With up to six phases, each capable of up to 2 MHz operation, the PX354x can be used to build DC-DC converters that provide up to 200A with excellent efficiency, low ripple, and the lowest component count.

The PX354x utilizes digital technology to implement all control functions, providing the ultimate in flexibility and stability. The PX354x incorporates an industry standard I2C-bus serial interface for control and monitoring. Through the serial interface, the power supply designer can quickly optimize designs and monitor system performance. The interface allows the PX354x to provide digitized information for real time system monitoring and control.

Features

-Multiphase power conversion 1-4 phases

-Intelligent Point-of-Load (POL) power regulation

-100 kHz to 2 MHz switching frequency

-Internal high precision voltage reference ??2.4mV voltage setpoint accuracy

-Startup and maximum voltages set through external resistor

-2-bit VID input for additional voltage control

-Driver detect prior to soft-start disables unpopulated phases

- Autonomous or user controlled phase dropping based on current balance and 12V supply faults

-Supports up to three 12V supplies with phase mapping

-Precise digital current balancing with programmable offsets for thermal balancing

-Digitally programmable loadline and loop compensation