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参数资料
| 型号： | MIC2292-15YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER WHITE BCKLGT 8-MLF |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1.4MHz ~ 1.8MHz |
| 电源电压： | 2.5 V ~ 10 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘，8-MLF? |
| 供应商设备封装： | 8-MLF?（2x2） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1082 (CN2011-ZH PDF) |
| 其它名称： | 576-1078-6 |
Micrel, Inc.
Functional Diagram
MIC2292/93 Functional Diagram
MIC2292/93
Functional Description
The MIC2292/93 is a constant frequency, PWM current-
mode boost regulator. The block diagram is shown
above. The MIC2292/93 is composed of an oscillator,
slope compensation ramp generator, current amplifier,
g m error amplifier, PWM generator, 500mA bipolar output
transistor, and Schottky rectifier diode. The oscillator
generates a 1.6MHz clock for the MIC2292 and a
2.0MHz clock for the MIC2293. The clocks' two functions
are to trigger the PWM generator that turns on the output
transistor and to reset the slope compensation ramp
The g m error amplifier measures the LED current through
the external sense resistor and amplifies the error
between the detected signal and the 95mV 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 the constant
frequency current-mode PWM control. The LED is set by
the feedback resistor:
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 slope
I
LED
=
95mV
R
FB
compensation ramp generator. This summed current-
loop signal is fed to one of the inputs of the PWM
generator.
The Enable pin shuts down the output switching and
disables control circuitry to reduce input current to
leakage levels. Enable pin input current is zero at zero
volts.
April 2012
8
M9999-040212-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2292-34BML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High Frequency PWM White LED Drivers with Internal Schottky Diode and OVP |
| MIC2292-34BML TR | 功能描述:IC LED DRIVER WHITE BCKLGT 8-MLF RoHS:否 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:1 系列:- 恒定电流:- 恒定电压:- 拓扑:PWM，切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:642kHz 电源电压:2.7 V ~ 5.5 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-VFDFN 裸露焊盘 供应商设备封装:10-VSON 包装:剪切带 (CT) 工作温度:-30°C ~ 85°C 产品目录页面:1371 (CN2011-ZH PDF) 其它名称:BD1603NUV-E2CT |
| MIC2292-34YML | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC2292-34YML TR | 功能描述:LED照明驱动器 1.6MHz White LED Driver w/34V OVP (Lead Free) RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MIC2292-34YMLH10 TR | 制造商:Micrel 功能描述:Micrel MIC2292-34YMLH10 TR |
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