MP1488DJ中文資料美國(guó)芯源數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

DESCRIPTION

The MP1488 is a step-up converter designed for

driving up to 27 WLEDs (9 strings of 3 WLEDs

each) from a 5V system rail. The MP1488 uses a

current mode, fixed frequency architecture to

regulate the LED current, which is measured

through an external current sense resistor. Its low

104mV feedback voltage reduces power loss and

improves efficiency. The OV pin monitors the

output voltage and turns off the converter if an

over-voltage condition is present due to an open

circuit condition.

The MP1488 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload.

The MP1488 is available in a small 6-pin TSOT23

package.

FEATURES

? 2.5V to 6V Input Voltage Range

? On Board Power MOSFET

? Drives up to 27 White LEDs at 5V Input

? Up to 92 Efficiency

? Over 1MHz Fixed Switching Frequency

? Open Load Shutdown

? Low 104mV Feedback Voltage

? Soft-Start/PWM Dimming

? UVLO, Thermal Shutdown

? Internal 800mA Current Limit

? Available in a TSOT23-6 Package

APPLICATIONS

? Cell Phones

? Handheld Computers and PDAs

? Digital Still Cameras

? Small LCD Displays