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| 型号： | SI9130CG-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM PIN PROG 28SSOP |
| 标准包装： | 225 |
| 应用： | 控制器，移动式个人电脑 |
| 输入电压： | 5.5 V ~ 30 V |
| 输出数： | 2 |
| 输出电压： | 5V，可编程 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 散装 |
Product is End of Life 3/2014
Si9130
Vishay Siliconix
3.3 V Switching Supply
The 3.3 V supply is regulated by a current-mode PWM
controller in conjunction with several externals: two
N-Channel MOSFETs, a rectifier, an inductor and output
capacitors (see Figure 1). The gate drive supplied by DH 3
needs to be greater than V L , so it is provided by the
bootstrap circuit consisting of a 100 nF capacitor and diode
connected to BST 3 .
A low-side switching MOSFET connected to DL 3 increases
efficiency by reducing the voltage across the rectifier diode.
A low value sense resistor in series with the inductor sets the
maximum current limit, to disallow current overloads at
power-on or in short-circuit situations.
The soft-start feature on the Si9130 is capacitor
programmable; pin SS 3 functions as a constant current
source to the external capacitor connected to GND. Excess
+ 5 V LDO
currents at power-on are avoided, and power-supplies can
be sequenced with different turn-on delay times by selecting
the correct capacitor value.
5 V Switching Supply
The 5 V supply is regulated by a current-mode PWM
controller which is nearly the same as the 3.3 V output. The
dropout voltage across the 5 V supply, as shown in the
schematic in Figure 1, is 400 mV (typ) at 2 A. If the voltage
at V+ falls, nearing 5 V, the 5 V supply will lower as well, until
the V L linear regulator output falls below the 4 V
undervoltage lockout threshold. Below this threshold, the 5 V
controller is shut off.
The frequency of both PWM controllers is set at 300 kHz
when the SYNC pin is tied to REF. Connecting SYNC to
either GND or V L sets the frequency at 200 kHz.
FB 3
V+
Linear
Regulator
3.3 V
CS 3
BST 3
V L
3.45ADJ
3.6ADJ
REF
SHDN
+ 3.3 V
Reference
ON
4.5 V
PWM
Controller
(See Figure 3)
ON
DH 3
LX 3
DL 3
SS 3
4V
2.8 V
5V
PGND
ON 3
FB 5
CS 5
BST 5
SYNC
300 kHz/200 kHz
Oscillator
ON
STANDBY
PWM
Controller
(See Figure 3)
DH 5
LX 5
DL 5
ON
SS 5
ON 5
Figure 2. Si9130 Block Diagram
Document Number: 70190
S11-0975-Rev. G, 16-May-11
www.vishay.com
9
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI9130CG-T1 | 功能描述:电流型 PWM 控制器 Pin-Programmable Dual Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| SI9130CG-T1-E3 | 功能描述:IC CTRLR PWM PIN PROG 28SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
| SI9130DB | 功能描述:电流型 PWM 控制器 SI9130 Demo Board RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| SI9130LG | 功能描述:电流型 PWM 控制器 Prog Dual Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| SI9130LG-E3 | 功能描述:电流型 PWM 控制器 Pin-Programmable Dual Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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