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
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