Silicon的電源參考方案
技術(shù)特點(diǎn):
Si825x系列可編程數(shù)字電源控制器為開(kāi)關(guān)方式電源系統(tǒng)提供閉環(huán)控制、系統(tǒng)保護(hù)和功率管理功能。獨(dú)創(chuàng)的Si825x結(jié)構(gòu)將一個(gè)專用的、基于DSP的控制環(huán)路處理器與一個(gè)在系統(tǒng)可編程的系統(tǒng)管理處理器結(jié)合在一起。這種結(jié)構(gòu)保證控制環(huán)路以10MHz的速度更新,而與固件尺寸和復(fù)雜度無(wú)關(guān)。固件可以在運(yùn)行中改變所有控制參數(shù)(環(huán)路增益、補(bǔ)償時(shí)間等),以使系統(tǒng)快速和智能地適應(yīng)變化的工作條件
支持隔離和非隔離應(yīng)用
支持AC/DC、DC/DC和PFC應(yīng)用
固定的10MHz更新速度(與固件無(wú)關(guān))
差分輸入ADC
環(huán)路濾波器DSP引擎
- PID + 二階低通濾波器
- 可選擇的離散時(shí)間或SINC二階低通濾波器
高靈活性DPWM,具有多達(dá)6個(gè)輸出相位
16或32KB FLASH - FLASH可用作EEPROM
片內(nèi)2%振蕩器
自定序8通道12位A - 小于5ns的抖動(dòng)分辨
高速可編程通用比較器 –
PMbus硬件接口(SMbus)
增強(qiáng)型UART,用于隔離的數(shù)據(jù)控制鏈
方案特點(diǎn):
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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