IS31LT3948-GRLS2-TR ISSI, IS31LT3948-GRLS2-TR Datasheet - Page 11

• Manufacturer Part Number: IS31LT3948-GRLS2-TR
• Description: LED Lighting Drivers PFM Mode Boost LED Drvr
• Manufacturer: ISSI

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
).