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參數(shù)資料
| 型號(hào)： | 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(jí)同步整流控制DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大?。?/td> | 175K |
| 代理商： | SI9124DQ |
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Si9124
Vishay Siliconix
New Product
Document Number: 72099
S-03638—Rev. B, 20-Mar-03
www.vishay.com
1
500-kHz Push-Pull DC-DC Converter With
Integrated Secondary Synchronous Rectification Control
FEATURES
12-V to 72-V Input Voltage Range
Compatible with ETSI 300 132-2 100 V, 100-ms
Transients
Integrated Push-Pull 1-A Primary Drivers
Voltage Mode Control
Voltage Feedforward Compensation
High Voltage Pre-Regulator Operates During Start-Up
Current Sensing On OUT
B
Primary Device
Hiccup Current Control During Shorted Load
Low Input Voltage Detection
Programmable Soft-Start Function
Programmable Oscillator Frequency
Over Temperature Protection
APPLICATIONS
Network Cards
Power Supply Modules
DESCRIPTION
Si9124 is a dedicated push-pull controller IC ideally suited to
fixed telecom dc-dc converter applications where high
efficiency is required at low output voltages (e.g. <3.3 V).
Designed to operate within the voltage range of 12-72 V and
withstand 100 V, 100 ms transients, the IC is capable of
controlling and directly driving both primary side MOSFET
switches of a push-pull circuit.
High conversion efficiency is achieved by use of synchronous
rectifying MOSFET transistors in the secondary. Due to the
very low on-resistance of the secondary MOSFETs, a
significant increase in the efficiency can be achieved as
compared with conventional Schottky diodes
for today’s low
output voltages. On-chip control of the dead time delays
between the primary and secondary signals keep efficiencies
high and prevents accidental destruction of the power
transformer or wasted energy from self timed approaches.
Such a system can achieve conversion efficiencies well in
excess of 90%.
FUNCTIONAL BLOCK DIAGRAM
Pulse
Transformer
-
Figure 1.
Voltage
Control
Current
Control
Pre-Reg
Primary
Drivers
Secondary
Driver
Error
Amp
Opto
C
LOAD
R
LOAD
V
OUT
R
S
Power
Transformer
Si9124
Push-Pull
Synchronous
Controller
V
IN
V
CC
EP
CS2
Voltage
Information
To
V
CC
C
VIN1
+
CV
CC
CS1
1.215 V
Soft-
Start
PWM
C
SS
SS
SEC_SYNC
V
INEXT
R
EXT
OUT
A
OUT
B
Driver
Logic
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相關(guān)代理商/技術(shù)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(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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