參數(shù)資料
型號: MIC2171
廠商: Micrel Semiconductor,Inc.
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: Isolated Flyback Switching Regulator with 9V Output
中文描述: 隔離反激式開關(guān)穩(wěn)壓9V輸出
文件頁數(shù): 1/10頁
文件大?。?/td> 80K
代理商: MIC2171
1997
4-3
MIC2171
Micrel
4
Features
2.5A, 65V internal switch rating
3V to 40V input voltage range
Current-mode operation, 2.5A peak
Internal cycle-by-cycle current limit
Thermal shutdown
Twice the frequency of the LM2577
Low external parts count
Operates in most switching topologies
7mA quiescent current (operating)
Fits LT1171/LM2577 TO-220 and TO-263 sockets
Applications
Laptop/palmtop computers
Battery operated equipment
Hand-held instruments
Off-line converter up to 50W
(requires external power switch)
Predriver for higher power capability
General Description
The MIC2171 is a complete 100kHz SMPS current-mode
controller with an internal 65V 2.5A power switch.
Although primarily intended for voltage step-up applications,
the floating switch architecture of the MIC2171 makes it
practical for step-down, inverting, and Cuk configurations as
well as isolated topologies.
Operating from 3V to 40V, the MIC2171 draws only 7mA of
quiescent current, making it attractive for battery operated
supplies.
The MIC2171 is available in a 5-pin TO-220 or TO-263 for
–40
°
C to +85
°
C operation.
MIC2171
100kHz 2.5A Switching Regulator
Preliminary Information
Typical Applications
C4
470μF
D2
1N5818
C1
47μF
C2
1μF
R3
1k
R4*
V
OUT
5V, 0.5A
* Optional voltage clipper (may be req’d if T1 leakage inductance too high)
C3*
D1*
R1
3.74k
1%
R2
1.24k
1%
V
IN
4V to 6V
T1
1:1.25
L
PRI
= 12μH
MIC2171
IN
SW
FB
GND
COMP
Figure 2.
MIC2171 5V Flyback Converter
+5V
(4.75V min.)
D1
1N5822
MIC2171
IN
SW
FB
C1*
47μF
R3
1k
C3
1μF
R1
10.7k
1%
C2
470μF
V
+12V, 0.25A
L1
15μH
* Locate near MIC2171 when supply leads > 2"
R2
1.24k
1%
GND
COMP
Figure 1.
MIC2171 5V to 12V Boost Converter
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MIC2171_07 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:100kHz 2.5A Switching Regulator
MIC2171BT 功能描述:IC REG MULTI CONFIG 2.5A TO220-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓(降壓) 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP(0.300",7.62mm) 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12
MIC2171BTL3 制造商:RF Micro Devices Inc 功能描述:
MIC2171BU 功能描述:IC REG MULTI CONFIG 2.5A TO263-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓(降壓) 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP(0.300",7.62mm) 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12
MIC2171BU TR 功能描述:IC REG MULTI CONFIG 2.5A TO263-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓(降壓) 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP(0.300",7.62mm) 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12