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KA7541 Datasheet

Part Number KA7541
Manufacturers Fairchild
Logo Fairchild
Description Simple Ballast Controller
Datasheet KA7541 DatasheetKA7541 Datasheet (PDF)

www.fairchildsemi.com KA7541 Simple Ballast Controller 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 compon.

  KA7541   KA7541






Part Number KA75450Z
Manufacturers Fairchild
Logo Fairchild
Description Voltage Detector
Datasheet KA7541 DatasheetKA75450Z Datasheet (PDF)

KA75XXX Voltage Detector www.fairchildsemi.com Features • Detecting Against Error Operations At The Power On/off. • Resetting Function For The Low Voltage Microprocessor. • Checking Low Battery Description The KA75250/KA75270/KA75290/KA75310/KA75330/ KA75360/KA75390/KA75420/KA75450 prevents the error of system from supply voltage below normal voltage level at the time the power on and instantaneous power off in systems. TO-92 1 SOT-89 1 1. Input 2. GND 3. Output Internal Block Diagram INP.

  KA7541   KA7541







Part Number KA75450M
Manufacturers Fairchild
Logo Fairchild
Description Voltage Detector
Datasheet KA7541 DatasheetKA75450M Datasheet (PDF)

KA75XXX Voltage Detector www.fairchildsemi.com Features • Detecting Against Error Operations At The Power On/off. • Resetting Function For The Low Voltage Microprocessor. • Checking Low Battery Description The KA75250/KA75270/KA75290/KA75310/KA75330/ KA75360/KA75390/KA75420/KA75450 prevents the error of system from supply voltage below normal voltage level at the time the power on and instantaneous power off in systems. TO-92 1 SOT-89 1 1. Input 2. GND 3. Output Internal Block Diagram INP.

  KA7541   KA7541







Part Number KA75450
Manufacturers Fairchild
Logo Fairchild
Description Voltage Detector
Datasheet KA7541 DatasheetKA75450 Datasheet (PDF)

www.fairchildsemi.com KA75XXX Voltage Detector Features • Detecting Against Error Operations At The Power On/off. • Resetting Function For The Low Voltage Microprocessor. • Checking Low Battery Description The KA75250/KA75270/KA75290/KA75310/KA75330/ KA75360/KA75390/KA75420/KA75450 prevents the error of system from supply voltage below normal voltage level at the time the power on and instantaneous power off in systems. TO-92 1 SOT-89 1 1. Input 2. GND 3. Output Internal Block Diagram I.

  KA7541   KA7541







Part Number KA7545
Manufacturers Fairchild
Logo Fairchild
Description VOLTAGE DETECTOR
Datasheet KA7541 DatasheetKA7545 Datasheet (PDF)

KA75XXX VOLTAGE DETECTOR VOLTAGE DETECTOR The KA75250/270/290/310/33/36/39/42/45 prevents error of system from supply voltage below normal voltage level at the time the power on and instantaneous power off in systems. TO-92 FEATURES • • • Detecting against error operations at the power ON/OFF. Resetting function for the low voltage microprocessor. Checking low battery 1.Input 2.GND 3.Output BLOCK DIAGRAM ORDERING INFORMATION VCC æ 1 Device KA75250 PKG Operating Temp. 3 OUT è KA75.

  KA7541   KA7541







Part Number KA7543
Manufacturers Fairchild
Logo Fairchild
Description Advanced Feedback Dimming Ballast Control IC
Datasheet KA7541 DatasheetKA7543 Datasheet (PDF)

www.fairchildsemi.com KA7543 Advanced Feedback Dimming Ballast Control IC Features • • • • • • • • • • • • • 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 c.

  KA7541   KA7541







Simple Ballast Controller

www.fairchildsemi.com KA7541 Simple Ballast Controller 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 Rev. 1.0.3 ©2001 Fairchild Semiconductor Corporation KA7541 Internal Block Diagram UVLO 2V Ref CS 0.22µF 2.5µA 1 − + Vref VZ Ict + + 3V 8Ict 1V + + − + Vref 2kΩ IS SQ Oscilator R latch Current mirror Frequency divider F.D IC Oscilator Internal bias IH Ik = IS / 6 1.8V + − 8 VCC UVLO 9.5V VCC Ct 180pF 2 7 OUT 1 VCC RS 22kΩ 30kΩ 3 3pF 6 OUT 2 Ldet 40kΩ 4 5pF 2V − + Shut down signal IH = Ik × (Vref − VSS) / Vref IS = Vref / RS 5 GND Absolute Maximum Ratings Parameter Supply voltage Peak drive output current Drive output cl.


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