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MIC2293C

MICREL
Part Number MIC2293C
Manufacturer MICREL
Description High Frequency PWM White LED Drivers
Published Aug 1, 2010
Detailed Description MIC2292/93C www.DataSheet4U.com High Frequency PWM White LED Drivers with Internal Schottky Diode and OVP General Des...
Datasheet PDF File MIC2293C PDF File

MIC2293C
MIC2293C

Overview
MIC2292/93C www.
DataSheet4U.
com High Frequency PWM White LED Drivers with Internal Schottky Diode and OVP General Description The MIC2292C and MIC2293C are high frequency, Pulse Width Modulator (PWM) boost regulators optimized for constant-current, white LED driver applications.
Because of their constant PWM switching frequencies of 1.
6MHz and 2MHz, respectively, the MIC2292/93C can use the smallest external components, allowing designers to avoid sensitive IF bands in their RF applications.
The products feature an internal Schottky diode and two levels of output overvoltage protection allowing a small size and efficient DC/DC solution that requires only four external components.
The 2.
5V to 10V input voltage range of MIC2292/3C allows direct operation from 1- and 2-cell Li Ion as well as 3- to 4cell NiCad/NiMH/Alkaline batteries.
The MIC2292/3C products are available in a small size 8-pin 2mm × 2mm MLF® package and have 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 Internal Schottky diode 1.
6MHz PWM operation (MIC2292C) 2.
0MHz PWM operation (MIC2293C) Stable with ceramic capacitors 15V and 34V output overvoltage protection options 500mA switch current rating 95mV feedback voltage <1% line and load regulation <1µA shutdown current Over-temperature protection UVLO 8-pin 2mm × 2mm MLF® package –40°C to +125°C junction temperature range Applications • White LED driver for backlighting: – Cell phones – PDAs – GPS systems – Digital cameras – MP3 players – IP phones • Constant current power supplies Typical Application 15µH 10µH MIC2292C-15BML VIN Li Ion 1µF EN GND SW OUT FB 95mV 0.
22µF 16V Li Ion 1µF MIC2293C-15BML VIN SW OUT EN GND FB 95mV 0.
22µF 16V 1.
6MHz PWM White LED Driver with 15V OVP MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
2MHz PWM White ...


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