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| 型号： | NCP5050MTTXG |
| 厂商： | ON Semiconductor |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR PHOTO FLASH 10-WDFN |
| 产品变化通告： | Product Discontinuation 30/Sept/2011 |
| 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，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1.48MHz ~ 1.95MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 20V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-WDFN（3x3） |
| 包装： | 标准包装 |
| 工作温度： | -10°C ~ 85°C |
| 其它名称： | NCP5050MTTXGOSDKR |
NCP5050
4.5 W Flash White LED
Boost Driver
The NCP5050 is a high powered fixed frequency PWM boost
converter optimized for constant current applications such as driving
high ? powered white LEDs. This device has been designed with
high ? efficiency for use in portable applications and is capable of
driving up to 5 high power LEDs in series for camera flash or
flashlight (torch) applications. To support the need of driving the
LEDs in a high current pulse mode for flash as well as a continuous
mode for focus or torch, a control pin and support circuitry is
incorporated which allows the user to program two LED currents. The
http://onsemi.com
MARKING
DIAGRAM
both output current are fully configurable via the use of 2 external
resistors and this average current can be reduced by applying a PWM
signal to the CTRL pin up to 50 kHz.
The PWM operates at 1.7 MHz which allows the use of small
WDFN10, 3x3
CASE 522AA
ISSUE A
5050
ALYW G
G
inductors and ceramic capacitors. In addition the compensation is
internal to the device which simplifies the design and reduces the PCB
component count. To protect the device cycle ? by ? cycle current
limiting and a thermal shutdown circuit have been incorporated as
well as output over ? voltage and time out protection. The maximum
peak current level of the power switch is adjustable to allow further
system optimization. The NCP5050 is housed in a low profile space
efficient 3x3 mm thermally enhanced WDFN.
Features
? High Efficiency Up to 88% for 2 LED (V F = 3.5 V by LED) at 200 mA
? High frequency Dimming PWM Control
? Maximum V out of 20 V
? 1.7 MHz PWM DC/DC Converter
? Shut Down Control Facility with True ? Cutoff
? Open LED (Output Overvoltage) Protection
? 1.2 s Timer out Function
? Soft Start to Limit Inrush Current
? Small 3x3x0.8 mm WDFN Package
? These are Pb ? Free Devices
Typical Applications
? White LED Flash (Camera Phone, Digital Still Camera,
Personal Media Player)
? Portable Flash Lights
? Medium Size LCD Backlight (See Application Note AND8294/D for
Details)
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb ? Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
PGND 1 10 SW
VS 2 9 PVIN
CTRL 3 8 LCS
CM 4 7 FB
PCA 5 6 HCS
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
2.7 to 5.5 V
D1
C1
4.7 m F
9
PVIN
L1
2.2 m H
SW
10
D2
C2
1 m F
5
PCA
VS
2
L1: TDK VLF5012T ? 2R2
4
R1
2.8 k
ENABLE
FLASH/
TORCH
3
CTRL
HCM
NCP5050
2.0
R2
R HCS
7
FB
R3
R LCS 10.0
D6
D1: ON MBR130LSF
C1: 4.7 m F 6.3 V 0603
TDK C1608X5R0J475M
C2: 1 m F 25V 0805
TDK C2012X5R1E105M
Figure 1. Typical Application Circuit
? Semiconductor Components Industries, LLC, 2010
December, 2010 ? Rev. 1
1
Publication Order Number:
NCP5050/D
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