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PDF IS31LT3360 Data sheet ( Hoja de datos )
| Número de pieza | IS31LT3360 | |
| Descripción | 40V/1.2A LED DRIVER | |
| Fabricantes | ISSI | |
| Logotipo |  |
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IS31LT3360
40V/1.2A LED DRIVER WITH INTERNAL SWITCH
GENERAL DESCRIPTION
The IS31LT3360 is a continuous mode inductive
step-down converter, designed for driving a single LED or
multiple series connected LEDs efficiently from a voltage
source higher than the LED voltage. The chip operates
from an input supply between 6V and 40V and provides
an externally adjustable output current of up to1.2A.
The IS31LT3360 includes an integrated output switch
and a high-side output current sensing circuit, which uses
an external resistor to set the nominal average output
current.
Output current can be adjusted linearly by applying an
external control signal to the ADJ pin. The ADJ pin will
accept either a DC voltage or a PWM waveform. This will
provide either a continuous or a gated output current.
Applying a voltage less than 0.2V to the ADJ pin turns the
output off and switches the chip into a low current
standby state.
The chip is assembled in SOT89-5 package.
OCTOBER 2011
FEATURES
Up to 1.2A output current
High efficiency (up to 98% )
Wide input voltage range: 6V to 40V
Internal 40V power switch
Simple low parts count
Typical 3% output current accuracy
Single pin on/off and brightness control using DC
voltage or PWM
Up to 1MHz switching frequency
Inherent LED open-circuit/short-circuit protection
Thermal shutdown protection circuitry
Typical 1200：1 dimming ratio
APPLICATIONS
LED MR16, MR11 spotlight
LED street light
PAR light
Other LED lighting
APPLICATION CIRCUIT
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IS31LT3360
Copyright © 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any
time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are
advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the
product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not
authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 10/19/2011
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
IS31LT3360
TYPICAL OPERATING CONDITIONS
For typical application circuit and TA=25°C unless otherwise stated.
600
500
400
300
200
100
0
5
10 15 20 25 30
Operating Supply Current vs. Vin
35 40
Vin(V)
250
200
150
100
50
0
5
10 15 20 25 30 35 40
Vin(V)
Quiescent Shutdown Current vs. Vin
1
0.95
0.9
0.85
0.8
0.75
0.7
0.65
Rs=0.10Ω
1LED
3LED
7LED
10LED
0.6
5 10 15 20 25 30 35 40
Vin(V)
Efficiency vs. No. of LEDs
L=47uH, Rs=0.10Ohm
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1
0.95
0.9
0.85
0.8
0.75
0.7
0.65
0.6
5
Rs=0.15Ω
1LED
3LED
7LED
10LED
10 15 20 25 30 35 40
Vin(V)
Efficiency vs. No. of LEDs
L=47uH, Rs=0.15Ohm
1
0.95
0.9
0.85
Rs=0.30Ω
1LED
3LED
7LED
0.8 10LED
0.75
0.7
0.65
0.6
5 10 15 20 25 30 35 40
Vin(V)
Efficiency vs. No. of LEDs
L=47uH, Rs=0.30Ohm
0.7
0.69
0.68
0.67
0.66
0.65
0.64
Rs=0.15Ω
1LED
3LED
7LED
10LED
0.63
0.62
0.61
0.6
5
10 15 20 25 30 35 40
Vin(V)
Output current variation with output Voltage
L=47uH, Rs=0.15Ohm
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 10/19/2011
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
IS31LT3360
PACKAGE INFORMATION
SOT89-5
http://www.DataSheet4U.net/
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 10/19/2011
11
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11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet IS31LT3360.PDF ] | |
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