Efficient backlight inverters save up to 30 components
Two new inverter ICs from Fairchild
Semiconductor eliminate up to 30
components in four-lamp CCFL
backlights to save footprint and
energy consumption.
The FAN7316 and FAN7317 achieve low
cost and high integration by
implementing a patented phase-shift
control method using full-wave rectifiers
for open-lamp protection and regulation.
Wide operating voltages, from 4.5V to 24V
in the FAN7316 and 6V to 25.5V in the
FAN7317, eliminate the need for an
external regulator to supply the IC.
In addition, multiple features and
functions enhance performance,
maximise flexibility for end users and
speed time to market. These include Open
Lamp Protection (OLP), Open Lamp
Regulation (OLR), selectable dimming
polarity and analogue or digital dimming
control.
As well as saving space and cost, the lower
part count of solutions built using the
FAN7316 or FAN7317 delivers superior
system reliability and also simplifies design
for N-N half-bridge, push-pull, and P-N fullbridge
inverters.
FEATURES
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- Zero-Voltage Switching (ZVS) topology
- Programmable striking frequency
- Arc protection
- Burst-dimming function
- PWM dimming by external pulse signal
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APPLICATIONS
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- LCD monitors in:
Industrial controls
Retail merchandising
Security systems
Test & measurement equipment
Automotive instrumentation
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