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MIC2293

Micrel Semiconductor
Part Number MIC2293
Manufacturer Micrel Semiconductor
Description (MIC2292 / MIC2293) High Frequency PWM White LED Drivers
Published Mar 24, 2007
Detailed Description www.DataSheet4U.com MIC2292/93 Micrel MIC2292/93 High Frequency PWM White LED Drivers with Internal Schottky Diode an...
Datasheet PDF File MIC2293 PDF File

MIC2293
MIC2293

Overview
www.
DataSheet4U.
com MIC2292/93 Micrel MIC2292/93 High Frequency PWM White LED Drivers with Internal Schottky Diode and OVP General Description The MIC2292 and MIC2293 are high frequency, Pulse Width Modulator (PWM) boost regulators optimized for constantcurrent, white LED driver applications.
Because of their constant PWM switching frequencies of 1.
6MHz and 2MHz, respectively, the MIC2292/93 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 MIC2292/3 allows direct operation from 1- and 2-cell Li Ion as well as 3- to 4-cell NiCad/NiMH/Alkaline batteries.
The MIC2292/3 products are available in a small size 2mm × 2mm 8-lead MLF™ package and have a junction temperature range of –40°C to +125°C.
All 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 (MIC2292) 2.
0MHz PWM operation (MIC2293) 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-lead (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 MIC2292-15BML 1µF VIN SW OUT EN GND FB 95mV 6.
3Ω 0.
22µF 16V Li Ion 1 µF MIC2293-15BML VIN SW OUT EN GND FB 95mV 6.
3Ω 0.
22µF 16V Li Ion 1.
6MHz PWM White LED Driver with 15V OVP 2MHz PWM White LED Driver with 15V OVP MLF and MicroLeadFrame are trademarks...


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