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參數(shù)資料
| 型號(hào)： | SI9124DQ-T1 |
| 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)： | 11/16頁(yè) |
| 文件大小： | 175K |
| 代理商： | SI9124DQ-T1 |
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Si9124
Vishay Siliconix
New Product
Document Number: 72099
S-03638—Rev. B, 20-Mar-03
www.vishay.com
11
Hiccup Operation
Current limiting is achieved by monitoring the differential
voltage between CS1 and CS2 pins which are connected
across a primary sense resistor. Once the differential voltage
exceeds the 150-mV trigger point, Hiccup operation is started.
The soft-start voltage on the SS pin is pulled to ground and
switching stops until the SS
pin
charges up to 2 V
be
whereupon
a duty cycle limited soft start is initiated. The upper and lower
switching points of the current limit have 50 mV of hysteresis.
V
INEXT
Voltage Monitor – V
INDET
The Si9124 provides a means of sensing the voltage on
V
INEXT
to control the operating mode and provides the
feed-forward control voltage to the PWM controller. This is
achieved by choosing an appropriate resistive tap between
V
INEXT
and ground.
When the V
INDET
voltage is greater than 720 mV but less than
V
REF
and V
CC
is greater than V
UVLO
, all internal circuitry is
enabled, but switching is stopped.
V
INDET
also provides the input to the voltage feed-forward
function by adjusting the amplitude of the PWM ramp to the
PWM comparator.
Shutdown Mode
If V
INDET
pin is forced below 470 mV the device will enter
SHUTDOWN mode. This powers down all unnecessary
functions of the controller, ensures that the primary switches
are off and results in a low level current demand of 150 A from
the V
INEXT
or V
CC
supplies.
TYPICAL CHARACTERISTICS
7.5
8.0
8.5
9.0
9.5
10.0
-50
-25
0
25
50
75
100
125
150
7.90
7.95
8.00
8.05
8.10
8.15
8.20
-50
-25
0
25
50
75
100
125
150
V
REG
vs. Temperature, V
IN
= 48 V
Temperature ( C)
(
V
R
V
INDET
V
REF
T
C
= -11 mV/C
V
SS
vs. Temperature, V
CC
= 12 V
Temperature ( C)
(
V
S
T
C
= +1.25 mV/C
V
INDET
V
REF
15
17
19
21
23
25
-50
-25
0
25
50
75
100
125
I
SS1
vs. V
CC
vs. Temperature
Temperature ( C)
V
CC
= 13 V
80
90
100
110
120
130
140
-50
-25
0
25
50
75
100
125
I
SS2
vs. V
CC
vs. Temperature
Temperature ( C)
V
CC
= 10 V
V
CC
= 12 V
V
CC
= 13 V
V
CC
= 10 V
V
CC
= 12 V
(
I
S
(
I
S
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(kāi)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 |
| SI9130CG-E3 | 功能描述:電流型 PWM 控制器 Pin-Programmable Dual Controller RoHS:否 制造商:Texas Instruments 開(kāi)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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