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參數資料
| 型號： | SI9123 |
| 廠商： | Vishay Intertechnology,Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Control |
| 中文描述： | 500千赫半橋型DC - DC與集成的次級同步整流控制轉換器 |
| 文件頁數： | 2/16頁 |
| 文件大?。?/td> | 181K |
| 代理商： | SI9123 |
Si9123
Vishay Siliconix
New Product
www.vishay.com
2
Document Number: 72098
S-03639—Rev. B, 20-Mar-03
DESCRIPTION (CONTINUED)
Si9123 has advanced current monitoring circuitry to permit the
user to set the maximum current in the primary circuit. Such a
feature acts as protection against output shorts. Upon sensing
an overload condition, the converter is shut off for a period of
time and then soft-start cycle is re-initiated, achieving hiccup
mode operation. Current sensing is by means of a sense
resistor on the low-side primary device. An integrated
over-temperature shutdown circuit also protects the system.
The 100-V depletion mode MOSFET integrated pre-regulator
circuit permits direct operation from input voltage with only one
series resistor during startup. The pre-regulator automatically
disconnects from the input supply when the output voltage is
established by means of a feedback winding from the filter
inductor.
Si9123 is available in
TSSOP-16
pin package. In order to
satisfy the stringent ambient temperature requirements,
Si9123 is rated to handle the industrial temperature range of
–40 to 85 C.
DETAILED BLOCK DIAGRAM
1.65 V
V
FF
-
+
Pre-Regulator
-
+
-
+
V
INDET
V
REF
V
IN
+
-
2.2 R
EP
-
+
PWM
Comparator
SS
-
+
CS2
CS1
Over Current Protection
GND
V
UVLO
V
UV
V
SD
V
CC
Hiccup
Mode Start
Driver
Control
and
Timing
OTP
OSC
R
OSC
Ramp
SEC_SYNC
D
L
PGND
D
H
SEC_SYNC
Driver
Low-Side
Driver
Level
Shift
BST
L
X
Si9123
Peak DET
R
I
V
REF
Error Amplifier
4I
High-Side
Driver
Gain
V
CC
V
CC
Figure 2.
8.8 V
550 mV
V
CC
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SI9124 | 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 | 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 | 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 |
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