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參數(shù)資料
| 型號(hào)： | MIC3172YM |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 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： | 3.5 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | LEAD FREE, SOIC-8 |
| 文件頁(yè)數(shù)： | 16/17頁(yè) |
| 文件大小： | 153K |
| 代理商： | MIC3172YM |
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MIC2172/3172
On/Off Control
Especially important for battery powered applications, the
lamp can be remotely or automatically turned off using the
MIC3172’s EN pin. The entire circuit draws less than 1
μ
A
while shutdown.
Micrel, Inc.
M9999-042205
16
April 2005
MIC3172
V
IN
V
SW
FB
COMP
C1
V
4.5V to 20V
EN
GND
P1 P2 S
Enable (On)
Shutdown (Off)
Cold Cathode
Fluorescent
Lamp
R5
Intensity
Control
R1
D1
R2
Q1
Q2
C2
C3
C4
C5
R3
R4
D3
1N4148
D2
1N4148
T1
F
P
P
L1
300μH
S
L1: Coiltronics CTX300-4P
T1: Coiltronics CTX110602
C2: Polyfilm, WIMA FKP2 0.1μF to 0.68μF
C4: 15pF to 30pF, 3kV min.
Figure 15. LCD Backlight Fluorescent Lamp Supply
Efficiency
To obtain maximum circuit efficiency careful selection of Q1
and Q2 for low collector to emitter saturation voltage is a
must. Inductor L1 should be chosen for minimal core and
copper losses at the switching frequency of the MIC3172, and
T1 should be carefully constructed from magnetic materials
optimized for the output power required at the Royer oscillator
frequency. Suitable inductors may be obtained from
Coiltronics, Inc., tel: (407) 241-7876.
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| MIC3172YN | 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 |
|---|---|
| MIC3172YM TR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.25A 100kHz Switching Regulator (Lead Free) 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 |
| MIC3172YM | 制造商:Micrel Inc 功能描述:IC POWER SUPPLY |
| MIC3172YM | 制造商:Micrel Inc 功能描述:Power Supply IC |
| MIC3172YN | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.25A 100kHz Switching Regulator (Lead Free) 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 |
| MIC3201 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:High Brightness LED Driver with High-Side Current Sense |
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