- 您现在的位置：买卖IC网 > PDF目录368620 > SI8250 (Silicon Laboratories Inc.) DIGITAL POWER CONTROLLER PDF资料下载
参数资料
| 型号： | SI8250 |
| 厂商： | Silicon Laboratories Inc. |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | DIGITAL POWER CONTROLLER |
| 中文描述： | 数字化电源控制器 |
| 文件页数： | 20/30页 |
| 文件大小： | 932K |
| 代理商： | SI8250 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页当前第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
Si8250/1/2
20
Preliminary Rev. 0.8
Single Phase POL (point of load) converter: A 65 W, 400 KHz Si8252 based single phase POL converter block
diagram is shown in Figure 7. DPWM outputs PH1 and PH2 control the gates of the buck and synchronous
switching transistors. A lossless current sensing method that relies on the resistor and inductance of the inductor is
used to measure the current for over current protection. The input voltage is measured using resistor divider
network and analog input port AIN0 of 12bit, 200 kHz ADC0.
Figure 7. Single-phase POL Block Diagram
When power is applied, the CPU executes an internal reset followed by initialization of all parameters. The Si8252
remains in a low-power state, monitoring digitized VIN data until VIN is within specified limits. At this time, the
controller is fully enabled and executes soft-start by monitoring output voltage while sequentially incrementing the
loop voltage reference (REFDAC) until the supply output voltage is within specified range, at which time steady-
state operation begins.
As in the previous half-bridge example, transient response is improved by adjusting loop gain at the onset of a
transient (i.e. nonlinear control). The efficiency of the POL converter can be optimized over the complete load
range by dynamically adjusting the dead-times. Typical efficiency simulation results for the POL are shown in
Figure 8. In this case, the single-phase POL operates at a PWM frequency of 400 kHz with an output voltage of
3.3 V and an input voltage range of 10 to 15 V. The curve shows the efficiency with an input voltage of 12.0 V.
Figure 8. POL Efficiency
PH1
PH2
AIN0
Vsense
Ipk
DRIVER
DRIVER
VIN
+2.5 V
CIN
GND
Si8252
VIN
Vout
L
Ipk
DIFFERENTIAL
AMPLIFIER
L
C
VDD
Ipk
0
5
10
15
20
25
80
85
90
95
Eff Io
(
)
Io
相关PDF资料 |
PDF描述 |
|---|---|
| SI8250-IM | DIGITAL POWER CONTROLLER |
| SI8250-IQ | DIGITAL POWER CONTROLLER |
| SI8401DB-T1 | P-Channel 20-V (D-S) MOSFET, Low-Threshold |
| SI8401DB-T1-E3 | P-Channel 20-V (D-S) MOSFET, Low-Threshold |
| SI8401DB | Single P-Channel MOSFET; |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI8250DK | 功能描述:电源管理IC开发工具 Development kit for Si8250/1/2 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| SI8250-IM | 功能描述:电压监测器/监控器 SMPS Controller RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
| SI8250-IMR | 制造商:Silicon Laboratories Inc 功能描述:VOLT SUPERVISOR PWR SUPPLY 0.05V TO 0.8V 28QFN - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC DIGITAL PWR CONTROLLER 32LQFP 制造商:Silicon Laboratories Inc 功能描述:32K 28 Pin SMPS Controller |
| SI8250-IQ | 功能描述:电压监测器/监控器 SMPS Controller RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
| SI8250-IQR | 制造商:Silicon Laboratories Inc 功能描述:VOLT SUPERVISOR PWR SUPPLY 0.05V TO 0.8V 32LQFP - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC DIGITAL PWR CONTROLLER 32LQFP 制造商:Silicon Laboratories Inc 功能描述:32K 32 Pin SMPS Controller |
发布紧急采购，3分钟左右您将得到回复。