The PFS1200 Series DC/DC power supply is a DSP controlled, highly efficient front-end power supply. It incorporates state of the art
technology and adopts boost converter and full bridge LLC which use resonance soft-switching technology, synchronous rectification
to reduce component stresses, thus providing increased system reliability and very high efficiency. With a wide input DC voltage range
the PFS1200 Series maximizes power availability in demanding server, network, and other high availability applications. The supply is
fan cooled and ideally suited for integration with a matching airflow path.
An active OR-ing device on the output ensures no reverse load current and renders the supply ideally suited for operation in redundant
power systems.
The always-on standby output provides power to external power distribution and management controllers. It is protected with an active
OR-ing device for maximum reliability.
Status information is provided with a front-panel LED. In addition, the power supply can be controlled and the fan speed set via the
I2C bus. The I2C bus allows full monitoring of the supply, including input and output voltage, current, power, and inside temperatures.
Cooling is managed by a fan controlled by the DSP controller. The fan speed is adjusted automatically depending on the actual power
demand and supply temperature and can be overridden through the I2C bus.
Figure 1. Block Diagram