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1725I Datasheet(PDF) 7 Page - Linear Technology

Part # 1725I
Description  General Purpose Isolated Flyback Controller
Download  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

1725I Datasheet(HTML) 7 Page - Linear Technology

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7
LT1725
1725f
BLOCK DIAGRA
COMP
ENDLY
MINENAB
tON
IAMP
FDBK
FB
OSCAP
OSC
MOSFET
DRIVER
UVLO
VCC
3VOUT
3V REG
(INTERNAL)
BIAS
VC
SOFT-START
LOAD
COMPENSATION
ISENSE
GATE
PGND
ROCMP
SFST
RCMPC
SGND
1725 BD
LOGIC
PI FU CTIO S
ENDLY (Pin 13): Pin for external programming resistor to
set enable delay time. See Applications Information for
details.
tON (Pin 14): Pin for external programming resistor to set
switch minimum on time. See Applications Information
for details.
VCC (Pin 15): Supply voltage for the LT1725. Bypass this
pin to ground with 1
µF or more.
GATE (Pin 16): This is the gate drive to the external power
MOSFET switch and has large dynamic currents flowing
through it. Keep the trace to the MOSFET as short as
possible to minimize electromagnetic radiation and volt-
age spikes. A series resistance of 5
Ω or more may help to
dampen ringing in less than ideal layouts.


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