National Semiconductor LM48555 Quick Start Manual Download | Manualshive

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Evaluation Board Schematic

30014819

FIGURE 2. Evaluation Board Schematic

www.national.com

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AN-1611

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Summary of Contents for LM48555

Page 1: ... power shutdown mode The LM48555 includes advanced click and pop suppression that eliminates audible turn on and turn off transients Addi tionally the integrated boost regulator features a soft start function that minimizes transient current during power up The LM48555 is unity gain stable and uses external gain set ting resistors The LM48555 Evaluation board shown in Figure 1 allows the user to e...

Page 2: ...Evaluation Board Schematic 30014819 FIGURE 2 Evaluation Board Schematic www national com 2 AN 1611 ...

Page 3: ... these terminals JU4 Power Supply This connector provides the power supply connection Apply an external power supply s positive voltage to the pin labeled VDD and the ground source to the pin labeled GND Bill of Materials TABLE 2 Bill of Materials Designator Part Description Manufacturer Part Number D2 Diode Schottky 20V 0 5A SOD123 ON Semi MBR0520LT1G L1 INDUCTOR 10μH 20 SMD Taiyo Yuden NR3010T10...

Page 4: ... Power and Ground Circuits For multi layer boards it is important to isolate the switching power and ground trace paths from the amplifier power and ground trace paths Star trace routing techniques bringing individual traces back to a central point rather than daisy chaining traces together in a serial manner can have a major impact on low level signal performance Star trace routing refers to usin...

Page 5: ...PCB Layout 30014813 FIGURE 3 Silkscreen Top 30014814 FIGURE 4 Top Layer 5 www national com AN 1611 ...

Page 6: ...30014815 FIGURE 5 Layer 2 30014816 FIGURE 6 Layer 3 www national com 6 AN 1611 ...

Page 7: ...30014817 FIGURE 7 Bottom Layer 30014818 FIGURE 8 Silkscreen Bottom 7 www national com AN 1611 ...

Page 8: ...THER INTELLECTUAL PROPERTY RIGHT LIFE SUPPORT POLICY NATIONAL S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION As used herein Life support devices or systems are devices which a are intended for surgical implant into the ...

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