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PDF IS31BL3506A Data sheet ( Hoja de datos )
| Número de pieza | IS31BL3506A | |
| Descripción | 1.0MHZ BOOST CONVERTER | |
| Fabricantes | ISSI | |
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IS31BL3506A
1.0MHZ BOOST CONVERTER WITH 35V INTERNAL MOSFET SWITCH
July 2012
GENERAL DESCRIPTION
IS31BL3506A 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 0.3V. The IS31BL3506A operates at a constant
switching frequency of 1.0MHz to allow for small
component size. IS31BL3506A 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 DFN-8 (2mm×2mm) 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
-9 LEDs (DFN-8)
-8 LEDs (TSOT-23-6)
PWM or DC voltage dimming
Frequency of PWM is 500Hz ~ 500kHz
1.0MHz high speed switching frequency
300mV feedback voltage
Integrated high power MOSFET
Over voltage protection
-40°C ~ +85°C working temperature range
TSOT-23-6 and DFN-8 (2mm×2mm) package
APPLICATIONS
Small LCD Backlights
Notebook PC
GPS
TYPICAL APPLICATION CIRCUIT
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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: Because of the different packages, VOVP is not the same (Page 6). 9 LEDs can be driven by DFN-8 package and 8 LEDs can be driven
by TSOT-23-6 package most.
Note 4: 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. B, 07/02/2012
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
IS31BL3506A
ORDERING INFORMATION
Industrial Range: -40°C to +85°C
Order Part No.
Package
QTY/Reel
IS31BL3506A-TTLS2-TR
IS31BL3506A-DLS2-TR
TSOT-23-6, Lead-free
3000
DFN-8, Lead-free
http://www.DataSheet4U.net/
Integrated Silicon Solution, Inc. – www.issi.com
Rev. B, 07/02/2012
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
IS31BL3506A
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.
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Figure 13 Classification Profile
Integrated Silicon Solution, Inc. – www.issi.com
Rev. B, 07/02/2012
11
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet IS31BL3506A.PDF ] | |
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