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LMZ14203H датащи(PDF) 23 Page - Texas Instruments

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номер детали LMZ14203H
подробное описание детали  SIMPLE SWITCHER 6V to 42V, 3A High Output Voltage Power Module
PDF  31 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

LMZ14203H датащи(HTML) 23 Page - Texas Instruments

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OUTPUT CURRENT (A)
VIN = 15V
VIN = 24V
VIN = 30V
VIN = 36V
VIN = 42V
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Top View
VIN
COUT
VOUT
RENT
RON
CSS
GND
Thermal Vias
CIN
GND
RENB
CFF
RFBT
RFBB
GND Plane
EPAD
LMZ14203H
www.ti.com
SNVS692G – JANUARY 2011 – REVISED OCTOBER 2015
Layout Example (continued)
Figure 50. PCB Layout Guide
10.3 Power Dissipation and Board Thermal Requirements
For a design case of VIN = 24 V, VOUT = 12 V, IOUT = 3 A, TA (MAX) = 65°C , and TJUNCTION = 125°C, the device
must see a maximum junction-to-ambient thermal resistance of:
RθJA-MAX < (TJ-MAX - TA(MAX)) / PD
(24)
This RθJA-MAX will ensure that the junction temperature of the regulator does not exceed TJ-MAX in the particular
application ambient temperature.
To calculate the required RθJA-MAX we need to get an estimate for the power losses in the IC. The following graph
is taken form the Typical Characteristics section (Figure 16) and shows the power dissipation of the LMZ14203H
for VOUT = 12 V at 85°C TA.
Figure 51. Power Dissipation VOUT = 12V TA = 85°C
Copyright © 2011–2015, Texas Instruments Incorporated
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Product Folder Links: LMZ14203H



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