Microchip MIC2299 Manual


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Side 1/14
MIC2299
3.5A Minimum, 2MHz High Brightness
LED Driver
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
October 2007
M9999-101907-B
General Description
The MIC2299 is a high power boost-switching regulator
that is optimized for constant-current control. The MIC2299
is capable of driving up to 2 series 1A white LED for
photoflash and other applications. The feedback voltage is
only 200mV, minimizing power dissipation in constant-
current control applications, and hence extends battery
life.
The MIC2299 has a brightness pin that allows for a
programmable torch mode as well as full flash with a
single pin when driving high current LEDs.
The MIC2299 implements a constant frequency 2MHz
PWM control scheme to make the smallest possible
design. The MIC2299’s 2MHz operation avoids signal
interference in the AM band.
The 2.5V to 10V input voltage range of MIC2299 allows
direct operation from 1- and 2-cell Li-Ion as well as 3- to 4-
cell NiCad/ NiMH/ Alkaline or lithium batteries. Maximum
battery life is assured with a low 1uA shutdown current.
The MIC2299 is available in a low profile 12-pin 3mm x
3mm MLF
®
package.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
Programmable current control
200mV ±10% feedback voltage
2.5V to 10V input voltage
Output over-voltage protection (OVP)
Output voltage up to 30V (max)
Fixed 2MHz Operation
Guaranteed 3.5A switch current over-temperature
Solution size of just 0.25in
2
(1.6cm
2
)
Output power range of 7W to 12W
<1% line regulation
1µA shutdown current
Over temperature protection
Externally programmable soft-start
Under-voltage lockout (UVLO)
12-pin 3mm x 3mm leadless MLF
®
package
–40
°
C to +125
°
C junction temperature range
Applications
Cell phones
PDAs
Digital cameras
White LED flashlights
___________________________________________________________________________________________________________
Typical Application
Figure 1. High Power White LED Driver


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MIC2299

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