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KA7540D

Description
Simple Dimming Ballast Control IC
CategoryPower/power management    The power supply circuit   
File Size102KB,14 Pages
ManufacturerSAMSUNG
Websitehttp://www.samsung.com/Products/Semiconductor/
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KA7540D Overview

Simple Dimming Ballast Control IC

KA7540D Parametric

Parameter NameAttribute value
MakerSAMSUNG
Parts packaging codeSOIC
package instructionSOP,
Contacts8
Reach Compliance Codeunknow
ECCN codeEAR99
Analog Integrated Circuits - Other TypesFLUORESCENT LIGHT CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE FREQUENCY MODULATION
Maximum input voltage25 V
Minimum input voltage8.7 V
Nominal input voltage14 V
JESD-30 codeR-PDSO-G8
length4.9 mm
Number of functions1
Number of terminals8
Maximum operating temperature105 °C
Minimum operating temperature
Maximum output current0.3 A
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Certification statusNot Qualified
Maximum seat height1.95 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency60 kHz
Temperature levelOTHER
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
width3.9 mm
Base Number Matches1
www.fairchildsemi.com
KA7540
Simple Dimming Ballast Control IC
Features
Internal soft start
No lamp protection
Voltage controlled dimming
Trimmed 1.5% internal bandgap reference
Under voltage lock out with 1.8V of hysteresis
Totem pole output with high state clamp
Low start-up and operating current
8-pin DIP & 8-pin SOP
Descriptions
The KA7540 provides simple and high performance
electronic ballast control functions. KA7540 is optimized for
electronic ballast requiring a minimum board area, reduced
component count and low power dissipation. Internal soft
start circuitry eliminates the need for an external soft start
PTC resistor. Voltage controlled dimming circuit is built into
the IC to control the lighting output in a wide range.
Protection circuitry has also been added to prevent switches
from burning out in no lamp condition. Output gate drive
circuit clamps power MOSFET gate voltage irrespective of
supply voltage.
8-DIP
Applications
• Electronic Ballast
• Lighting Control System
• Half-bridge Drive Control System
1
8-SOP
1
Rev. 1.0.1
©2001 Fairchild Semiconductor Corporation

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