Silicon的电源参考方案
技术特点:
Si825x系列可编程数字电源控制器为开关方式电源系统提供闭环控制、系统保护和功率管理功能。独创的Si825x结构将一个专用的、基于DSP的控制环路处理器与一个在系统可编程的系统管理处理器结合在一起。这种结构保证控制环路以10MHz的速度更新,而与固件尺寸和复杂度无关。固件可以在运行中改变所有控制参数(环路增益、补偿时间等),以使系统快速和智能地适应变化的工作条件
支持隔离和非隔离应用
支持AC/DC、DC/DC和PFC应用
固定的10MHz更新速度(与固件无关)
差分输入ADC
环路滤波器DSP引擎
- PID + 二阶低通滤波器
- 可选择的离散时间或SINC二阶低通滤波器
高灵活性DPWM,具有多达6个输出相位
16或32KB FLASH - FLASH可用作EEPROM
片内2%振荡器
自定序8通道12位A - 小于5ns的抖动分辨
高速可编程通用比较器 –
PMbus硬件接口(SMbus)
增强型UART,用于隔离的数据控制链
方案特点:
The Si825x Single-Phase POL Reference Design implements a digitally-controlled POL with a DPWM (digital pulsewidth modulation) switching frequency of 391 kHz. The Si8252 Single-Phase POL Target Board (Figure 1) containssystem power stages and digital control circuits with debug connectors for the Si8252 digital power controller. Theuser can also access and control the target board using SMBus.
The Si825x Single-Phase POL Reference Design comes with Application Builder software (detailed in "8. Si825xApplication Builder” on page 12), a configurable real-time software Kernel, and a software Kernel compiledspecifically for the Si8252 Single-Phase POL Target Board.
PMBus is a connectivity solution designed for networking multiple power supplies using a single management bus.The Real-time Kernel provided with the Si825x Single-Phase POL Reference Design includes optional support forPMBus. In addition, the Si825x POL design kit also comes with a PMBus Monitor application and USB to SMBusBridge Board to manage the power supply through PMBus.
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