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參數(shù)資料
| 型號(hào)： | TOP414 |
| 廠商： | Power Integrations, Inc. |
| 英文描述： | Three-terminal DC to DC PWM Switch |
| 中文描述： | 三端直流到直流PWM開關(guān) |
| 文件頁(yè)數(shù)： | 5/16頁(yè) |
| 文件大小： | 434K |
| 代理商： | TOP414 |
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A
4/99
TOP412/414
5
CONTROL pin. V
regulation changes from shunt mode to
the hysteretic auto-restart mode described above. When the
fault condition is removed, the power supply output becomes
regulated, V
regulation returns to shunt mode, and normal
operation of the power supply resumes.
Latching Shutdown
The output overvoltage protection latch is activated by a high-
current pulse into the CONTROL pin. When set, the latch
turns off the
TOPSwitch
output. Activating the power-up
reset circuit by removing and restoring input power, or
momentarily pulling the CONTROL pin below the power-up
reset threshold resets the latch and allows
TOPSwitch
to
resume normal power supply operation. V
is regulated in
hysteretic mode when the power supply is latched off.
Over-Temperature Protection
Temperature protection is provided by a precision analog
circuit that turns the output MOSFET off when the junction
temperature exceeds the thermal shutdown temperature
(typically 145
°
C). Activating the power-up reset circuit by
removing and restoring input power or momentarily pulling the
CONTROL pin below the power-up reset threshold resets the
latch and allows
TOPSwitch
to resume normal power supply
operation. V
is regulated in hysteretic mode when the power
supply is latched off.
High-voltage Bias Current Source
This current source biases
TOPSwitch
from the DRAIN pin and
charges the CONTROL pin external capacitance (C
) during
start-up or hysteretic operation. Hysteretic operation occurs
during auto-restart and latched shutdown. The current source
is switched on and off with an effective duty cycle of
approximately 35%. This duty cycle is determined by the ratio
of CONTROL pin charge (I
) and discharge currents (I
and
I
). This current source is turned off during normal operation
when the output MOSFET is switching.
PI-1119-110194
VIN
VOUT
0
IOUT
0
1
2
1
4
3
DRAIN
0
VIN
VC
0
1
2
1
2
8
1
0
IC
1
2
8
8
1
2
8
1
VC(reset)
45 mA
Figure 6. Typical Waveforms for (1) Normal Operation, (2) Auto-restart, (3) Latching Shutdown, and (4) Power Down Reset.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TOP414G | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 12 W 48 VDC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP414GN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 12 W 48 VDC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP414GN-TL | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 12 W 48 VDC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP414G-TL | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 12 W 48 VDC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP432DIP | 制造商:Misc 功能描述: |
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