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PDF IS31BL3229 Data sheet ( Hoja de datos )
| Número de pieza | IS31BL3229 | |
| Descripción | 8-LED BACKLIGHT DRIVER | |
| Fabricantes | ISSI | |
| Logotipo |  |
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IS31BL3229
8-LED BACKLIGHT DRIVER
GENERAL DESCRIPTION
The IS31BL3229 with a smart charge-pump circuit is a
parallel white-LED driver with eight matched 20mA
current outputs. It can supply a total output current of
160mA over an input voltage range of 2.7V to 5.5V.
IS31BL3229 typically draws less than 1µA when placed
in shutdown, and 0.7mA when operating in the no-load
and 1X mode condition. If any of the outputs are not
used, leave the pin(s) unconnected. Brightness can be
controlled by simple-series-control techniques and
external PWM signal.
IS31BL3229 is available in QFN-20 (3mm × 3mm). It
operates from 2.7V to 5.5V over the temperature range
of -40°C to +85°C.
October 2012
FEATURES
Supply voltage: 2.7V ~ 5.5V
1X, 1.5X operating mode
fade in and fade out mode
Output current can be 25mA
32 current level and PWM intensity control
Low input current ripple, low EMI
90% high efficiency
No inductors, low noise operation
Over voltage protection on output
Built-in thermal protection
Automatic soft start
Built-in thermal protection
QFN-20 (3mm × 3mm ) package
APPLICATIONS
Cell phone, smart phone, PDA
Mp3, Mp4, PMP
White LED backlighting
TYPICAL APPLICATION CIRCUIT
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Figure 1 Typical Application Circuit
Note 1: PWM pin should be pulled high if modulated by EN pin only. EN pin should be pulled high if modulated with PWM pin only. Please refer
to Page 8 for detail information.
Note 2: The fade in and fade out mode is only available when shut down and enable the IC by EN pin.
Note 3: D1 must be connected and others can be floating in less than 8 LEDs application.
Note 4: The IC should be placed far away from the mobile antenna in order to prevent the EMI.
Integrated Silicon Solution, Inc. – www.issi.com
Rev.A, 09/17/2012
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
IS31BL3229
ELECTRICAL CHARACTERISTICS (Continue)
VCC = 2.7V ~ 5.5V, TA = 25°C, unless otherwise noted. Typical value are TA = 25°C, VCC = 3.6V.
Symbol
Parameter
Condition
Min. Typ.
Max.
Unit
EN, PWM Pin Characteristics
VIL Enable threshold low
VCC = 2.7V
VIH Enable threshold high
VCC = 5.5V
tLO EN low time
(Note 6)
tHI EN high time
(Note 6)
tOFF EN off time
(Note 6)
tLAT EN latch time
(Note 6)
fPWM Input frequency for PWM pin
tOFF_PWM PWM off time
(Note 7)
Note 5: Typical value.
Note 6: Guaranteed by design.
Note 7: As the PWM pin is pulled low at least 128ms, the IS31BL3229 will be shutdown.
0.4 V
1.4 V
0.5 75 μs
0.5 75 μs
500 μs
500 μs
0.1 50 kHz
128 ms
http://www.DataSheet4U.net/
Integrated Silicon Solution, Inc. – www.issi.com
Rev.A, 09/17/2012
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
IS31BL3229
PACKAGE INFORMATION
QFN-20
http://www.DataSheet4U.net/
Note: All dimensions in millimeters unless otherwise stated.
Integrated Silicon Solution, Inc. – www.issi.com
Rev.A, 09/17/2012
11
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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| PDF Descargar | [ Datasheet IS31BL3229.PDF ] | |
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