- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄368621 > SI9124DQ (Vishay Intertechnology,Inc.) 500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control PDF資料下載
參數(shù)資料
| 型號： | SI9124DQ |
| 廠商： | Vishay Intertechnology,Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control |
| 中文描述： | 500千赫推挽式直流與集成的次級同步整流控制DC轉換器 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大小： | 175K |
| 代理商： | SI9124DQ |
Si9124
Vishay Siliconix
New Product
www.vishay.com
8
Document Number: 72099
S-03638—Rev. B, 20-Mar-03
DETAILED FUNCTIONAL BLOCK DIAGRAM
Figure 5.
+
-
132 k
EP
+
-
-
+
-
+
V
REG
9.1 V
V
CC
V
IN
Pre-Regulator
V
UVLO
8.6 V
Reference
Voltage
3.3 V
Voltage
Feedforward
OSC
160 C Temp
Protection
V
SD
V
UV
V
UVLO
Logic
Clock
OTP
V
REF
V
INDET
-
+
R
OSC
Oscillator
Clock
60 k
V
REF
/2
PWM
Generator
-
+
-
+
V
UV
V
SD
V
REF
550 mV
Logic
OUT
A
V
CC2
PGND
2
Primary A
Driver
OUT
B
SEC_SYNC
PGND
Primary B
Driver
Secondary
Synchronous
Driver
GND
Current
Control
Gain
100 mV
CS2
CS1
V
CC
V
CC
Blanking
SS Enable
V
CC
20 A
80 A
SS Control
SS
V
REF
9.1 V
DETAILED OPERATION
Start-Up
A detailed Functional Block Diagram is shown in
Figure 5
with
additional detail of the pre-regulator shown in
Figure 6
. The
pre-regulator circuit acts as a linear regulator to provide V
CC
directly from the V
INEXT
supply until the V
CC
supply voltage
between 10 V to 13.2 V can be sustained from an auxiliary
winding from the secondary of the power inductor.
When V
INEXT
rises above 0 V (see Figure 6), the internal
pre-regulator begins charging the external capacitor on V
CC
.
The charging current is limited to typically 40 mA by the internal
DMOS device. When Vcc exceeds the UVLO voltage of 8.8 V,
a soft-start cycle of the controller is initiated to provide power
to the secondary. Once switching commences, the internal
gate drivers for the primary side switching transistors and the
drive current into the secondary synchronization driver draw
additional current from the V
CC
capacitor and pre-regulator.
相關PDF資料 |
PDF描述 |
|---|---|
| SI9124DQ-T1 | 500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control |
| Si9139DG | Multi-Output, Individual On/Off Control Power-Supply Controller |
| Si9139DG-1815 | Multi-Output, Individual On/Off Control Power-Supply Controller |
| Si9139DG-2015 | Multi-Output, Individual On/Off Control Power-Supply Controller |
| Si9139DG-2018 | Multi-Output, Individual On/Off Control Power-Supply Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SI9124DQ-T1 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control |
| SI9124DQ-T1-E3 | 制造商:Vishay Siliconix 功能描述:IC DRIVER PUSH PULL 9124 TSSOP16 |
| SI9130 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Pin-Programmable Dual Controller?Portable PCs |
| SI9130_11 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Pin-Programmable Dual Controller - Portable PCs |
| SI9130CG | 功能描述:電流型 PWM 控制器 Prog Dual Controller RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
發(fā)布緊急采購，3分鐘左右您將得到回復。