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PDF IS31BL3506B Data sheet ( Hoja de datos )
| Número de pieza | IS31BL3506B | |
| Descripción | 1.0MHZ BOOST CONVERTER | |
| Fabricantes | ISSI | |
| Logotipo |  |
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IS31BL3506B
1.0MHZ BOOST CONVERTER WITH 35V INTERNAL MOSFET SWITCH
April 2013
GENERAL DESCRIPTION
IS31BL3506B is a boost converter featuring an
integrated MOSFET switch designed for driving series
strings of LED or other device. Input operating voltage
range is 2.7V~5.5V. The device regulates the LED load
current is set using an external, low value sensing
resistor. The device adjusts the PWM duty cycle of the
switch to maintain the voltage at the FB pin at a value
of 0.2V. The IS31BL3506B operates at a constant
switching frequency of 1.0MHz to allow for small
component size. IS31BL3506B features an over
voltage shutdown pin which prevents the output
voltage from exceeding 35V (typ.) in the case of an
open circuit condition. The device is offered in a tiny
TSOT-23-6 and SOT-23-6 package and a temperature
rating from -40°C ~ +85°C.
FEATURES
Supply voltage: 2.7V~5.5V
Built-in soft start
Drive series strings of 8 LEDs
PWM or DC voltage dimming
Frequency of PWM is 500Hz ~ 500kHz
1.0MHz high speed switching frequency
200mV feedback voltage
Integrated high power MOSFET
Over voltage protection
-40°C ~ +85°C working temperature range
TSOT-23-6 and SOT-23-6 package
APPLICATIONS
Small LCD Backlights
Notebook PC
GPS
TYPICAL APPLICATION CIRCUIT
Figure 1 Constant current white LED driver using PWM at the EN pin to control intensity
Note 1: COUT must be rated for 50V. Smaller values of output capacitance will cause the LED current ripple to increase.
Note 2: The resistor REST should be placed as close as possible to the FB pin to prevent the EMI.
Note 3: The high level of PWM signal for EN pin should last at least 200ns when power on, or the IC won’t start up.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 04/15/2013
1
1 page  
IS31BL3506B
ORDERING INFORMATION
Industrial Range: -40°C to +85°C
Order Part No.
Package
QTY/Reel
IS31BL3506B-TTLS2-TR
IS31BL3506B-STLS2-TR
TSOT-23-6, Lead-free
3000
SOT-23-6, Lead-free
Copyright © 2013 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, 04/15/2013
5
5 Page 
IS31BL3506B
CLASSIFICATION REFLOW PROFILES
Profile Feature
Preheat & Soak
Temperature min (Tsmin)
Temperature max (Tsmax)
Time (Tsmin to Tsmax) (ts)
Average ramp-up rate (Tsmax to Tp)
Liquidous temperature (TL)
Time at liquidous (tL)
Peak package body temperature (Tp)*
Time (tp)** within 5°C of the specified
classification temperature (Tc)
Average ramp-down rate (Tp to Tsmax)
Time 25°C to peak temperature
Pb-Free Assembly
150°C
200°C
60-120 seconds
3°C/second max.
217°C
60-150 seconds
Max 260°C
Max 30 seconds
6°C/second max.
8 minutes max.
Figure 13 Classification Profile
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 04/15/2013
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet IS31BL3506B.PDF ] | |
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