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MIC2291BD5

产品描述1.2A PWM Boost Regulator Photo Flash LED Driver
产品类别模拟混合信号IC    驱动程序和接口   
文件大小703KB,共10页
制造商Microchip(微芯科技)
官网地址https://www.microchip.com
下载文档 详细参数 选型对比 全文预览

MIC2291BD5概述

1.2A PWM Boost Regulator Photo Flash LED Driver

MIC2291BD5规格参数

参数名称属性值
是否Rohs认证不符合
厂商名称Microchip(微芯科技)
零件包装代码SOT-23
包装说明VSSOP, TSOP5/6,.11,37
针数5
Reach Compliance Codecompli
ECCN代码EAR99
接口集成电路类型LED DISPLAY DRIVER
JESD-30 代码R-PDSO-G5
JESD-609代码e0
长度2.9 mm
湿度敏感等级1
复用显示功能NO
功能数量1
区段数3
端子数量5
最高工作温度125 °C
最低工作温度-40 °C
封装主体材料PLASTIC/EPOXY
封装代码VSSOP
封装等效代码TSOP5/6,.11,37
封装形状RECTANGULAR
封装形式SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度)240
电源3.6 V
认证状态Not Qualified
座面最大高度1 mm
最大供电电压10 V
最小供电电压2.5 V
标称供电电压3.6 V
表面贴装YES
温度等级AUTOMOTIVE
端子面层Tin/Lead (Sn85Pb15)
端子形式GULL WING
端子节距0.95 mm
端子位置DUAL
处于峰值回流温度下的最长时间30
宽度1.6 mm

文档预览

下载PDF文档
MIC2291
1.2A PWM Boost Regulator Photo Flash
LED Driver
General Description
The MIC2291 is a 1.2MHz Pulse Width Modulation (PWM),
boost-switching regulator that is optimized for high-current,
white LED photo
flash
applications. With a guaranteed
switch current of 1.2A, the MIC2291 easily drives a string
of 3 white LEDs in series at 100mA, ensuring a high level
of brightness and eliminating several ballast resistors.
The MIC2291 implements a constant frequency, 1.2MHz
PWM control scheme. The high frequency PWM operation
saves board space by reducing external component sizes.
The added benefit of the constant frequency PWM
scheme, in contrast to variable frequency topologies, is
much lower noise and input ripple injected back to the
battery source.
To optimize efficiency, the feedback voltage is set to only
95mV. This reduces the power dissipation in the current
set resistor, and allows the lowest total output voltage,
hence minimal current draw from the battery.
The MIC2291 is available with 2 levels of over-voltage
protection, 15V, and 34V. This allows designers to choose
the smallest possible external components with the
appropriate voltage ratings for their applications.
The MIC2291 is available in low-profile, Thin SOT23 5-pin
and 8-pin 2mm × 2mm MLF
®
package options. The
MIC2291 has a junction temperature range of –40°C to
+125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
2.5V to 10V input voltage
Output voltage up to 34V
1.2A switch current
1.2MHz PWM operation
95mV feedback voltage
Overvoltage protection (OVP)
– Options for 15V and 34V
Stable with ceramic capacitors
<1% line and load regulation
1µA shutdown current
Over temperature protection
UVLO
Low-profile Thin SOT23-5 package option
2mm × 2mm MLF
®
package option
–40°C to +125°C junction temperature range
Applications
Photo Flash LED driver
Cell phones
PDAs
GPS systems
Digital cameras
IP phones
LED
flashlights
Typical Application
10µH
100mA
10µH
100mA
MIC2291xD5
5
MIC2291-15xML
1
1-Cell
Li Ion
3V to 4.2V
VIN
EN
SW
FB
GND
2
VIN
SW
OVP
FB
GND
95mV
0.22µF
1µF
4
3
0.22µF
ceramic
95mV
1-Cell
Li Ion
3V to 4.2V
1µF
EN
Thin SOT23 Flash LED Driver
PowerPAK is a trademark of Siliconix, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
2mm x 2mm Flash LED Driver with Output OVP
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2007
1
M9999-051507

MIC2291BD5相似产品对比

MIC2291BD5 MIC2291 MIC2291_07 MIC2291YD5 MIC2291-15BML MIC2291-15YML MIC2291-34YML MIC2291-34BML
描述 1.2A PWM Boost Regulator Photo Flash LED Driver 1.2A PWM Boost Regulator Photo Flash LED Driver 1.2A PWM Boost Regulator Photo Flash LED Driver 1.2A PWM Boost Regulator Photo Flash LED Driver 1.2A PWM Boost Regulator Photo Flash LED Driver 1.2A PWM Boost Regulator Photo Flash LED Driver 1.2A PWM Boost Regulator Photo Flash LED Driver 1.2A PWM Boost Regulator Photo Flash LED Driver
是否Rohs认证 不符合 - - 符合 不符合 符合 符合 不符合
包装说明 VSSOP, TSOP5/6,.11,37 - - LEAD FREE, TSOT-23, 5 PIN HVSON, SOLCC8,.08,20 HVSON, 2 X 2 MM, LEAD FREE, MLF-8 HVSON, SOLCC8,.08,20
Reach Compliance Code compli - - compli compli compli compli compli
ECCN代码 EAR99 - - EAR99 EAR99 EAR99 EAR99 EAR99
接口集成电路类型 LED DISPLAY DRIVER - - LED DISPLAY DRIVER LED DISPLAY DRIVER LED DISPLAY DRIVER LED DISPLAY DRIVER LED DISPLAY DRIVER
JESD-30 代码 R-PDSO-G5 - - R-PDSO-G5 S-XDSO-N8 S-XDSO-N8 S-XDSO-N8 S-XDSO-N8
JESD-609代码 e0 - - e3 e0 e3 e3 e0
长度 2.9 mm - - 2.9 mm 2 mm 2 mm 2 mm 2 mm
湿度敏感等级 1 - - 1 1 1 1 1
复用显示功能 NO - - NO NO NO NO NO
功能数量 1 - - 1 1 1 1 1
区段数 3 - - 3 3 3 3 3
端子数量 5 - - 5 8 8 8 8
最高工作温度 125 °C - - 125 °C 125 °C 125 °C 125 °C 125 °C
最低工作温度 -40 °C - - -40 °C -40 °C -40 °C -40 °C -40 °C
封装主体材料 PLASTIC/EPOXY - - PLASTIC/EPOXY UNSPECIFIED UNSPECIFIED UNSPECIFIED UNSPECIFIED
封装代码 VSSOP - - VSSOP HVSON HVSON HVSON HVSON
封装形状 RECTANGULAR - - RECTANGULAR SQUARE SQUARE SQUARE SQUARE
封装形式 SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH - - SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度) 240 - - 260 240 260 260 240
认证状态 Not Qualified - - Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
座面最大高度 1 mm - - 1 mm 0.95 mm 0.95 mm 0.95 mm 0.95 mm
最大供电电压 10 V - - 10 V 10 V 10 V 10 V 10 V
最小供电电压 2.5 V - - 2.5 V 2.5 V 2.5 V 2.5 V 2.5 V
标称供电电压 3.6 V - - 3.6 V 3.6 V 3.6 V 3.6 V 3.6 V
表面贴装 YES - - YES YES YES YES YES
温度等级 AUTOMOTIVE - - AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE
端子面层 Tin/Lead (Sn85Pb15) - - MATTE TIN Tin/Lead (Sn80Pb20) MATTE TIN MATTE TIN Tin/Lead (Sn80Pb20)
端子形式 GULL WING - - GULL WING NO LEAD NO LEAD NO LEAD NO LEAD
端子节距 0.95 mm - - 0.95 mm 0.5 mm 0.5 mm 0.5 mm 0.5 mm
端子位置 DUAL - - DUAL DUAL DUAL DUAL DUAL
处于峰值回流温度下的最长时间 30 - - 40 30 40 40 30
宽度 1.6 mm - - 1.6 mm 2 mm 2 mm 2 mm 2 mm
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