GENERAL DESCRIPTION

The ZCC3302 is a 7.5V step-up DC/DC converter

designed for driving up to single 10-series or

9x3-series WLEDs from a single cell Lithium Ion-

battery.

The ZCC3302 uses current mode, fixed frequency

architecture to regulate the LED current, which is

measured through an external current sense resistor.

Its low 300mV feedback voltage reduces power loss

and improves efficiency. The ZCC3302 supports hig-

h frequency PWM Dimming through EN pin.

The ZCC3302 is turned off if an open-circuit condition

is presented. Please be noted that open-circuit

condition is not the same as over-voltage condition..

Please refer to the OPERATION DESCRIPTION and

APPLICATION INFORMATION sections for more

detail.

The ZCC3302 includes soft-start, under-voltage locko-

ut, current limiting and thermal 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

 Internal 1.5A Current Limit

 SOT23-6 Package

APPLICATIONS

 5~7” LCD Panels

 Handheld Computers and PDAs

 Digital Cameras

 Small LCD Displays