UCC2305

UCC3305

BLOCK DIAGRAM

SLUS297B - SEPTEMBER 1995 - REVISED APRIL 2004

•

Regulates Lamp Power

•

Compensates For Lamp

Temperature

•

Fixed Frequency Operation

•

Current Mode Control

•

Overcurrent Protected

•

Overvoltage Shutdown

•

Open and Short Protected

•

High Current FET Drive Output

•

Operates Over Wide Battery

Voltage Range: 5V to 18V

The UCC3305 integrates all of the functions required to control and drive one

HID lamp. The UCC3305 is tailored to the demanding, fast turn-on requirements

of automobile headlamps, but is also applicable to all other lighting applications

where HID lamps are selected. HID lamps are ideal for any lighting applications

that can benefit from very high efficiency, blue-white light color, small physical

lamp size, and very long life.

The UCC3305 contains a complete current mode pulse width modulator, a lamp

power regulator, lamp temperature compensation, and total fault protection.

Lamp temperature compensation is critical for automobile headlamps, because

without compensation, light output varies dramatically from a cold lamp to one

that is fully warmed up.

The UCC2305 is tested for full performance with ambient temperature

from –40

°C to +105°C while the UCC3305 is tested with ambient temperature

from 0

°Cto+70°C. The UCC3305 is available in a 28 pin small-outline, surface

mount plastic package (SOIC).

HID Lamp Controller

FEATURES

DESCRIPTION

UDG-94091-1

application

INFO

available