7V 1.5A 1.25MHz Step-up 10 White LED Driver ZCC3302 替代MP3302

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7V 1.5A 1.25MHz Step-up10 White LED Driver ZCC3302 替代MP3302

GENERAL DESCRIPTION

The ZCC3302 is a 7.5V step-up DC/DC converter designedfor driving up to single 10-series or 9x3-series WLEDs from a single cellLithium Ion- battery.   The ZCC3302 usescurrent mode, fixed frequency architecture to regulate the LED current, whichis measured through an external current sense resistor. Its low 300mV feedbackvoltage reduces power loss and improves efficiency. The ZCC3302 supports hig-hfrequency PWM Dimming through EN pin. The ZCC3302 is turned off if anopen-circuit condition is presented. Please be noted that open-circuitcondition is not the same as over-voltage condition.. Please refer to theOPERATION DESCRIPTION and

APPLICATION INFORMATION sections for more detail. TheZCC3302 includes soft-start, under-voltage locko-ut, current limiting andthermal overload protections. The ZCC3302 is available in SOT23-6 package.

   

FEATURES

■  Operating Voltage: 2.5-7.5V

■  Maximum  Output Voltage:  35V,   capable of driving 10-series White LED strings

■  Maximum drive  Capability:  9x3- series or 6x6-series.

■  Up to 90% Efficiency

■  1.25MHz Fixed Switching Frequency

■  Low 300mV Feedback Voltage

■  Support PWM Dimming

 ■Open-circuit Protection

 ■ UVLO,Soft-Start and Thermal Shutdown

 ■ Internal1.5A Current Limit

 ■ SOT23-6Package

APPLICATIONS

 ■ 5~7” LCDPanels

 ■ HandheldComputers and PDAs

 ■ DigitalCameras

 ■ Small LCDDisplays