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參數(shù)資料
| 型號(hào)： | MIC2296 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | High Power Density 1.2A Boost Regulator |
| 中文描述： | 高功率密度1.2A的升壓穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 6/10頁(yè) |
| 文件大?。?/td> | 223K |
| 代理商： | MIC2296 |
Micrel
MIC2296
Functional Description
The MIC2296 is a high power density, PWM dc/dc boost
regulator. The block diagram is shown in Figure 1. The
MIC2296
is
composed
compensation ramp generator, current amplifier, gm error
amplifier, PWM generator, and a 1.2A bipolar output
transistor. The oscillator generates a 600kHz clock. The
clock’s two functions are to trigger the PWM generator that
turns on the output transistor, and to reset the slope
compensation ramp generator. The current amplifier is
used to measure the switch current by amplifying the
voltage signal from the internal sense resistor. The output
of the current amplifier is summed with the output of the
VIN
April 2005
6
M9999-042005
(408) 955-1690
of
an
oscillator,
slope
slope compensation ramp generator. This summed
current-loop signal is fed to one of the inputs of the PWM
generator.
The g
m
error amplifier measures the feedback voltage
through the external feedback resistors and amplifies the
error between the detected signal and the 1.24V reference
voltage. The output of the g
m
error amplifier provides the
voltage-loop signal that is fed to the other input of the
PWM generator. When the current-loop signal exceeds the
voltage-loop signal, the PWM generator turns off the
bipolar output transistor. The next clock period initiates the
next switching cycle, maintaining constant frequency
current-mode PWM control
GND
CA
PWM
Generator
Ramp
Generator
600kHz
Oscillator
SW
EN
FB
OVP*
1.24V
*
OVP available on MLF
TM
package option only.
g
m
OVP*
V
REF
MIC2296
MIC2296 Block Diagram
Figure 1
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| MIC2507 | Quad Integrated High-Side Switch Not Recommended for New Designs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2296_10 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:High Power Density 1.2A Boost Regulator |
| MIC2296BD5 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:High Power Density 1.2A Boost Regulator |
| MIC2296BD5 TR | 功能描述:IC REG BOOST ADJ 1.2A TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)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(kāi)關(guān):52kHz 電流 - 輸出:1A 同步整流器:無(wú) 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 |
| MIC2296BML | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:High Power Density 1.2A Boost Regulator |
| MIC2296BML TR | 功能描述:IC REG BOOST ADJ 1.2A 8MLF RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)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(kāi)關(guān):52kHz 電流 - 輸出:1A 同步整流器:無(wú) 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 |
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