IS31LT3948-GRLS2-TR ISSI, IS31LT3948-GRLS2-TR Datasheet - Page 11
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IS31LT3948-GRLS2-TR
Manufacturer Part Number
IS31LT3948-GRLS2-TR
Description
LED Lighting Drivers PFM Mode Boost LED Drvr
Manufacturer
ISSI
Datasheet
1.IS31LT3948-GRLS2-TR.pdf
(14 pages)
Specifications of IS31LT3948-GRLS2-TR
Input Voltage
5 V to 100 V
Maximum Supply Current
400 uA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOP-8
Factory Pack Quantity
2500
IS31LT3948
6. R4, R5 to set OVP
Set V
Choose R5=10kΩ, then R4 = 470kΩ.
7. NMOS M1 and diode D1
I1
V1
Integrated Silicon Solution, Inc. – www.issi.com
Rev.B, 12/24/2012
V
OVP
(NMOS)
(NMOS)
OVP
V
>I
>V
OVP
= Vout+5V = 45V
peak
OVP
(
TH
IN
)
R
4
R
5
R
5
Lower R
efficiency.
times (or higher) to
Choose 13N10L as M1
The average and peak current of diode must exceed
the output average current and input peak current.
diode’s maximum reverse voltage rating must exceed
the over voltage protection of the application.
Choose SS310 as D1
DS(on)
The recommended NMOS rating current is 5
NMOS can improve the converter
the input peak current (
I
peak
11
( IN
)
The
).