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PDF ( 数据手册 , 数据表 ) KA7541D

零件编号 KA7541D
描述 Simple Ballast Controller
制造商 Fairchild
LOGO Fairchild LOGO 


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KA7541D 数据手册, 描述, 功能
KA7541
Simple Ballast Controller
www.fairchildsemi.com
Features
• Internal soft start
• Flexible soft start frequency
• No lamp protection
• 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
Descriptions
The KA7541 provides simple and high performance
electronic ballast control functions. KA7541 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. The initial soft start switching frequency and
soft start time can be adjusted depending on the types of
lamps. Protection circuitry has also been added to prevent
burning out of switches in no lamp condition. output gate
drive circuit clamps power MOSFET gate voltage
irrespective of supply voltage
8-DIP
1
8-SOP
1
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.3







KA7541D pdf, 数据表
KA7541
DC Link Voltage (Vdd)
V2
Rfilament
R1
Rfilament
Rfilament
To pin #4
R4
Rfilament
R2
V3
R3
C4
Figure 4. Lamp detection resistor network
8














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