The RT8894A is a multi-phases PWM controller. Moreover, it is compliant with AMD SVI2 Voltage Regulator Specification to support both CPU core (VDD) and Northbridge portion (VDDNB) of the CPU. The RT8894A adopts the G-NAVPTM (Green-Native AVP), which is a Richtek's proprietary topology. The G-NAVP makes it an easy setting controller to meet all AMD AVP (Adaptive Voltage Positioning) requirements. The droop is easily programmed by setting the DC gain of the error amplifier. With proper compensation, the load transient response can achieve optimized AVP performance. The RT8894A uses SVI2 interface to control 8-bit DAC to set output voltage and operation mode, and support a dynamic platform master. An I2C interface is available for advanced power configuration and monitoring. The RT8894A also features programmable power states with different sets of operating phase number, over clocking offset, switching frequency, load-line and protection setting. The platform master can optimize the performance and efficiency of the power according to different working scenarios via the I2C interface. The RT8894A also provides power good indication, over-current indication and dual OCP mechanism for AMD SVI2 CPU core and NB. It also features complete fault protection functions including over-voltage, under-voltage and negative-voltage protections.
- AMD SVI2 CPU
- Desktop Computer