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UCC2305
UCC3305
HID Lamp Controller
FEATURES
DESCRIPTION
•
Regulates Lamp Power
•
Compensates For Lamp
Temperature
•
Fixed Frequency Operation
•
Current Mode Control
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.
•
Overcurrent Protected
•
Overvoltage Shutdown
•
Open and Short Protected
•
High Current FET Drive Output
•
Operates Over Wide Battery
Voltage Range: 5V to 18V
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°C to +70°C. The UCC3305 is available in a 28 pin small-outline, surface
mount plastic package (SOIC).
BLOCK DIAGRAM
UDG-94091-1
SLUS297B - SEPTEMBER 1995 - REVISED APRIL 2004
UCC2305
UCC3305
ABSOLUTE MAXIMUM RATINGS
CONNECTION DIAGRAM
VCC Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0V
BOOST Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 12.0V
PWMOUT Current, Peak . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.0A
PWMOUT Energy, Capacitive Load . . . . . . . . . . . . . . . . . 5.0µJ
Input Voltage, Any Input. . . . . . . . . . . . . . . . . . –0.3V to +10.0V
Output Current, QOUT, QOUT, FLT . . . . . . . . . . . . . . ±10.0mA
Output Current, 5VREF, LPOWER, COMP . . . . . . . . . ±10.0mA
ISET Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.0mA
Storage Temperature . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . −55°C to +150°C
Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
PDIP-28 or SOIC-28 (Top View)
N or DW Package
ELECTRICAL CHARACTERISTICS Unless otherwise stated, VCC = 6.6V, ISET = 100kΩ to GND, ADJ = 100kΩ to GND,
OSC = 200pF to GND, BAT = 4V, LOADISENSE connected to LPOWER, VOUTSENSE = 0.666V, BOOST = 10.5V, COMP
connected to FB through a 100kΩ resistor, –40°C
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