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| 型号： | MIC4832YMM |
| 厂商： | Micrel Inc |
| 文件页数： | 5/11页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER LN 220VP-P EL 8-MSOP |
| 标准包装： | 100 |
| 类型： | EL 灯驱动器 |
| 频率： | 60Hz ~ 1kHz |
| 电流 - 电源： | 45µA |
| 电源电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 1086 (CN2011-ZH PDF) |
| 其它名称： | 576-2127-5 576-2127-5-ND 576-2977-5 |
Micrel
Functional Diagram
Functional Description
Figure 1. MIC4832 Block Diagram
MIC4832
Overview
The MIC4832 is a high-voltage EL driver with an AC
output voltage of 220V peak-to-peak capable of
driving EL lamps up to 3 in 2 . Input supply current for
the MIC4832 is typically 45μA reducing to 10nA in
shutdown. The high voltage EL driver has two
internal oscillators to control the switching MOSFET
and the H-bridge driver. Both of the internal
oscillators’ frequencies can be individually
programmed through the external resistors to
maximize the efficiency and the brightness of the EL
lamp.
Regulation
Referring to Figure 1, initially power is applied to
V DD . The internal feedback voltage is less than the
reference voltage causing the internal comparator to
go high which enables the switching MOSFET’s
oscillator. When the switching MOSFET turns on,
current flows through the inductor and flows into the
switch. The switching MOSFET will typically turn on
for 90% of the switching period. During the on-time,
energy is stored in the inductor. When the switching
MOSFET turns off, current flowing into the inductor
forces the voltage across the inductor to reverse
polarity. The voltage across the inductor rises until
the external diode conducts and clamps the voltage
at V OUT + V D1 . The energy in the inductor is then
discharged into the C OUT capacitor. The internal
comparator continues to turn the switching MOSFET
on and off until the internal feedback voltage is
above the reference voltage. Once the internal
feedback voltage is above the reference voltage, the
internal comparator turns off the switching
MOSFET’s oscillator.
When the EL oscillator is enabled, V A and V B switch
in opposite states to achieve a 220V peak-to-peak
AC output signal. The external resistor that connects
to the REL pin determines the EL frequency.
March 2009
5
M9999-033109-C
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4832YMM TR | 功能描述:LED照明驱动器 220Vpp Low Noise EL Driver 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 |
| MIC4833 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Low Noise Dual 220 VPP EL Driver With Output Voltage Slew Rate Control |
| MIC4833YML | 制造商:Micrel Inc 功能描述:EL Lamp DRVR 5.8V 12-Pin MLF 制造商:Micrel 功能描述:Low Noise 220Vp-p EL Driver MLF12 |
| MIC4833YML TR | 功能描述:LED照明驱动器 Dual EL Driver in 3x3MLF 12-Lead Package 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 |
| MIC4833YML-TR | 功能描述:IC DVR EL LOW NOISE 12-MLF 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 类型:EL 灯驱动器 频率:100Hz ~ 1.5kHz 电压 - 电源:2.3 V ~ 5.8 V 电流 - 电源:152μA 电流 - 灌/拉输出:- 调光:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:12-VFDFN 裸焊盘，12-MLF? 图号:* 制造商卷带直径:* 制造商卷带材料:* 制造商卷带宽度:* 供应商器件封装:12-MLF?（4x4） 标准包装:1 |
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