IS31LT3948-GRLS4-EB: 5 ~ 100V in, 2A @ 45V Max, Non-Isolated Output LED Driver

Summary

IS31LT3948 is a PFM step-up DC-DC converter designed for driving the white LED arrays for large size LCD panel backlighting applications. With internal OVP circuit, the chip and the system can be safe even if the load is not connected. The device features external PWM dimming or DC dimming, which allows the flexible control of the backlighting luminance. IS31LT3948 incorporates a unique FB scheme which automatically adjusts the integrated DC/DC converter to the optimum output voltage for the system, maximizing the efficiency.

IS31LT3948 general DEMO board is used in general lamp.

Features:

Wide input voltage range: 5V~100V
Constant Current Output limited only by external component selection (Note)
No loop compensation required
Internal over-voltage protection
Internal over-temperature protection

Specifications

Manufacturer	ISSI, Integrated Silicon Solution Inc
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board Part Number	2521-IS31LT3948-GRLS4-EB-ND
Eval Board Supplier	Lumissil Microsystems
Eval Board	Board not Stocked
Voltage In	5 ~ 100 V
Topology	Step Up
Current Out	2 A
Voltage Out (Max)	45 V
Outputs and Type	1 Non-Isolated
Efficiency @ Conditions	>89%, 12 ~ 30V in, 36V @ 2 A
Features	Over Voltage Protection Thermal Protection
Switching Frequency	20 ~ 200 kHz
Component Count + Extras	14 + 8
Design Author	ISSI
Application / Target Market	Automotive Lighting: LED Street Lighting
Main I.C. Base Part	IS31LT3948
Date Created By Author	2016-01
Date Added To Library	2024-09