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LM3519 Datenblatt(PDF) 13 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Teilenummer LM3519
Bauteilbeschribung  High Frequency Boost White LED Driver with High-Speed PWM Brightness Control
PDF  14 Pages
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Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3519 Datenblatt(HTML) 13 Page - National Semiconductor (TI)

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Application Information (Continued)
I
OUT vs VIN
20160239
LAYOUT GUIDELINES
The input capacitor, C
IN,
must be placed close to the
LM3519. Placing C
IN close to the device will reduce the
metal trace resistance effect on input voltage ripple. Metal
trace connections for the C
OUT capacitor can increase the
effective series resistance, which affects output voltage
ripple and efficiency. Trace connections to the inductor
should be short and wide to reduce power dissipation, in-
crease overall efficiency and reduce EMI radiation. The di-
ode, like the inductor, should have trace connections that are
short and wide to reduce power dissipation and increase
overall efficiency. For more details regarding layout guide-
lines for switching regulators, refer to Applications Note AN-
1149.
www.national.com
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