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LM25183-Q1 Datenblatt(PDF) 31 Page - Texas Instruments

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Teilenummer LM25183-Q1
Bauteilbeschribung  LM25183-Q1 42-VIN PSR Flyback DC/DC Converter with 65-V, 2.5-A Integrated MOSFET
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Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM25183-Q1 Datenblatt(HTML) 31 Page - Texas Instruments

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Locate the converter IC close
to the transformer and connect
to the GND plane as shown
Use heatsinking for the clamp
Zener, especially if the transformer
leakage inductance is high
Minimize the area of the
secondary winding,
flyback diode and output
capacitor switching loops
Place the ceramic input
capacitor close to the IC to
minimize the switching loop area
Place the RSET, TC, FB and SS small-signal
components near their respective pins
Maintain the appropriate primary-
to-secondary clearance distance
Locate the converter IC close
to the transformer and connect
to the GND plane as shown
Locate the RC snubber
components close to
the flyback diode
Place the Y-cap close to the transformer so that common-mode
currents from the secondary to the primary side return in a tight loop
Keep the DZ clamp and RC snubber
components close to the primary winding
pins and use heatsinking for the Zener
Keep the secondary
winding, flyback diode
and output capacitor
loop as tight as possible
Place the input capacitor close
to the VIN pin and connect to
the GND plane under the IC
Locate the RSET, TC and FB resistors and
the SS capacitor close to their respective pins
Use adequate heatsinking
copper connected to the
cathode of the flyback
diode (VOUT)
31
LM25183-Q1
www.ti.com
SNVSBJ4 – APRIL 2020
Product Folder Links: LM25183-Q1
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Copyright © 2020, Texas Instruments Incorporated
10.2 Layout Examples
Figure 47. Single-Output PCB Layout Example
Figure 48. Dual-Output PCB Layout Example


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