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参数资料
| 型号： | MCP1650DM-LED2 |
| 厂商： | Microchip Technology |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO FOR MCP1650 WHITE LED |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 15mA |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 32.4V |
| 特点： | 可调光 |
| 输入电压： | 2.7 ~ 4.5V |
| 已供物品： | 板 |
| 已用 IC / 零件： | MCP1650 |
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MCP1650/51/52/53
5.1.2
BOOTSTRAP BOOST
to start up with the input voltage below 2.7V. For this
APPLICATIONS
For bootstrap configurations, the higher-regulated
boost output voltage is used to power the MCP1650/
51/52/53. This provides a constant higher voltage used
to drive the external MOSFET. The R-option devices
(UVLO < 2.0V) can be used for applications that need
type of application, the MCP1650/51/52/53 will start off
of the lower 2.0V input and begin to boost the output up
to its regulated value. As the output rises, so does the
input voltage of the MCP1650/51/52/53. This provides
a solution for 2-cell alkaline inputs for output voltages
that are less than 6V.
Li-Ion Input to 5.0V 1A Regulated Output (Bootstrap) with MCP1652 Power Good Output
3.3 μH
Schottky Diode
Vout = 5V
Iout = 1A
10 ?
V IN
8
3
CS
2
4
7
Input
Voltage
2.8V to 4.2V
C in
47 μF
0.1 μF
o n
o ff
GND
S HDN
5
NC 6
MCP1652
1 EXT
FB
PG
N-Channel
MOSFET
3.09 k ?
C out
47 μF
Ceramic
0.1 ?
Shutdown
Power Good Output
1 k ?
FIGURE 5-2:
Bootstrap Application Circuit MCP1650/51/52/53.
5.1.3
SEPIC CONVERTER
with the previous boost-converter applications, the
APPLICATIONS
In many applications, the input voltage can vary above
and below the regulated output voltage. A standard
boost converter cannot be used when the output volt-
age is below the input voltage. In this case, the
MCP1650/51/52/53 can be used as a SEPIC controller.
A SEPIC requires 2 inductors or a single coupled
SEPIC converter can be used in either a bootstrap or
non-bootstrap configuration. The SEPIC converter can
be a very popular topology for driving high-power
LEDs. For many LEDs, the forward voltage drop is
approximately 3.6V, which is between the maximum
and minimum voltage range of a single-cell Li-Ion
battery, as well as 3 alkaline or nickel metal batteries.
inductor, in addition to an AC coupling capacitor. As
Li-Ion Input to 3.6V 3W LED Driver (SEPIC Converter)
3.3 μH
4.7 μF
Schottky Diode
I OUT = 1A
off
2
5
Input
Voltage
2.8V to 4.2V
C IN
47 μF
10 ?
0.1 μF
o n
V IN
8
GND
SHDN
NC 6
MCP1651
3
1
4
7
CS
EXT
FB
PG
N-Channel
MOSFET
3.3 μH
2.49 k ?
C OUT
47 μF
Ceramic
0.1 ?
Dimming Capability
Power Good Output
1 k ?
3W
LED
0.2 ?
FIGURE 5-3:
DS21876A-page 16
SEPIC Converter Application Circuit MCP1650/51/52/53.
? 2004 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP1650EV | 功能描述:开发板和工具包 - PIC / DSPIC MCP1650 Boost Contr Eval Board RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| MCP1650R-E/MS | 功能描述:直流/直流开关转换器 UVLO 2V RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MCP1650R-E/MS | 制造商:Microchip Technology Inc 功能描述:Controller IC |
| MCP1650REMS | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:750 kHz Boost Controller |
| MCP1650REUN | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:750 kHz Boost Controller |
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