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參數(shù)資料
| 型號： | MC34166 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| 中文描述： | 射頻放大器 |
| 文件頁數(shù)： | 8/18頁 |
| 文件大?。?/td> | 265K |
| 代理商： | MC34166 |
MC34166, MC33166
http://onsemi.com
8
equivalent Schottky barrier rectifier is recommended to fulfill
these requirements.
Undervoltage Lockout
An Undervoltage Lockout comparator has been
incorporated to guarantee that the integrated circuit is fully
functional before the output stage is enabled. The internal
5.05 V reference is monitored by the comparator which
enables the output stage when V
CC
exceeds 5.9 V. To prevent
erratic output switching as the threshold is crossed, 0.9 V of
hysteresis is provided.
Thermal Protection
Internal Thermal Shutdown circuitry is provided to protect
the integrated circuit in the event that the maximum junction
temperature is exceeded. When activated, typically at 170
°
C,
the latch is forced into a ‘reset’ state, disabling the output
switch. This feature is provided to prevent catastrophic
failures from accidental device overheating.
It is not
intended to be used as a substitute for proper heatsinking.
The MC34166 is contained in a 5lead TO220 type package.
The tab of the package is common with the center pin (Pin 3)
and is normally connected to ground.
DESIGN CONSIDERATIONS
Do not attempt to construct a converter on wirewrap
or plugin prototype boards.
Special care should be taken
to separate ground paths from signal currents and ground
paths from load currents. All high current loops should be
kept as short as possible using heavy copper runs to minimize
ringing and radiated EMI. For best operation, a tight
component layout is recommended. Capacitors C
IN
, C
O
, and
all feedback components should be placed as close to the IC
as physically possible. It is also imperative that the Schottky
diode connected to the Switch Output be located as close to
the IC as possible.
Figure 16. Low Power Standby Circuit
Figure 17. Over Voltage Shutdown Circuit
Figure 18. SoftStart Circuit
1
5
R
1
120
Error
Amp
Compensation
100 A
I = Standby Mode
V
Shutdown
= V
Zener
+ 0.7
t
SoftStart
≈
35,000 C
ss
C
ss
D
1
D
2
1.0 M
V
in
1
5
R
1
120
Error
Amp
Compensation
100 A
1
5
R
1
120
Error
Amp
Compensation
100 A
+
+
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC34167 | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC34166_05 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:3.0 A, Step−Up/Down/Inverting Switching Regulators |
| MC34166D2T | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 40V 3A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MC34166D2TG | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 40V 3A Buck/Boost/Inverting RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MC34166D2TR4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 40V 3A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MC34166D2TR4G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 40V 3A Buck/Boost/Inverting RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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