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KA7543D Datasheet

  • KA7543D

  • Advanced Feedback Dimming Ballast Control IC

  • 16頁

  • FAIRCHILD

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KA7543
Advanced Feedback Dimming Ballast Control IC
Features
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Lamp Current Feedback
Soft Start on Feedback
Voltage Dimming (0V~2V) on Feedback
Switch off Control (Vdm=5V)
Soft Dimming Control
No Lamp Protection
One Lamp Detection for Feedback
Abnormal Protection
Low Start-up and Operating Supply Current
UVLO with 1.8V Hysteresis
Totem Pole Output
Trimmed 1.5% Internal Bandgap Reference
14-DIP & 14-SOP
Descriptions
The KA7543 is an advanced lamp current feedback dimming
control IC. This ballast control IC provides all of the
necessary features to implement wide range dimming
control, soft start and constant power consumption for
intelligent electronic ballast systems. The KA7543 is
optimized for advanced electronic ballast systems requiring
minimum board area. External component counts can be
reduced by adopting the KA7543. Current feedback control
method of the inverter status is one of the most attractive
merits in KA7543. Internal soft start circuitry eliminates the
need for external soft start discrete components. Voltage
controlled soft dimming circuit is built into the IC to control
the lighting output in a wide range. Protection circuitry, no
lamp protection, abnormal protection, one lamp detection,
UVLO, restart on lamp adding , have been added.
14-DIP
Applications
鈥?Electronic Ballast
鈥?Lighting Control System
鈥?Half Bridge Drive Control System
1
14-SOP
1
Rev. 1.0.3
漏2002 Fairchild Semiconductor Corporation

KA7543D 產(chǎn)品屬性

  • Fairchild Semiconductor

  • Half-Bridge Drivers

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