IS31LT3948-GRLS2-TR ISSI, IS31LT3948-GRLS2-TR Datasheet - Page 2

• 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
Pin Configurations
Pin Descriptions
Ordering Information
Integrated Silicon Solution, Inc. – www.issi.com
Rev.B, 12/24/2012
Order Part No.
IS31LT3948-GRLS2-TR
Pin
1
2
3
4
5
6
7
8
Name
GATE
TOFF
GND
VCC
OVP
ADJ
CS
Package
FB
SOP-8
Package
SOP-8, Lead-free
Positive power supply input pin. Internally clamped at 5V (typical).
Off time setting pin. An external resistor connected to this PIN forms an
RC discharge path to generate a constant minimum off time of the NMOS
Enable and input peak current control pin. Pulled up to 4.5V internally to
set V
shutdown. If 0.5≤V
Note: During the start up(VCC voltage is rising), ADJ must not be
connected to low(recommended floating).
Ground
Driver’s output for the gate of the external NMOS
Current sense input for the boost, peak current control loop
Feedback voltage input pin. Used to regulate the current of LEDs by
keeping VFB=0.3V.
Overvoltage protection input pin., if the voltage of OVP exceed 1V, Gate
will always shutdown
CSTH
=0.24V when ADJ is floating. If V
QTY/Reel
2500
ADJ
≤2.4V, V
Top View
CSTH
Function
= V
ADJ
/10. If V
ADJ
<0.5V, NMOS will always
ADJ
>2.4V, V
CSTH
=0.24V.
2