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BACKLIGHT DRIVER. IS31BL3229 Datasheet

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BACKLIGHT DRIVER. IS31BL3229 Datasheet






IS31BL3229 DRIVER. Datasheet pdf. Equivalent




IS31BL3229 DRIVER. Datasheet pdf. Equivalent





Part

IS31BL3229

Description

8-LED BACKLIGHT DRIVER



Feature


IS31BL3229 8-LED BACKLIGHT DRIVER Octobe r 2012 GENERAL DESCRIPTION The IS31BL32 29 with a smart charge-pump circuit is a parallel white-LED driver with eight matched 20mA current outputs. It can su pply a total output current of 160mA ov er an input voltage range of 2.7V to 5. 5V. IS31BL3229 typically draws less tha n 1µA when placed in shutdown, and 0.7 mA when operating i.
Manufacture

ISSI

Datasheet
Download IS31BL3229 Datasheet


ISSI IS31BL3229

IS31BL3229; n 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. IS3 1BL3229 is available in QFN-20 (3mm × 3mm). It operates from 2.7V to 5.5V ove r the temperature range of -40°C to +8 5°C. FEATURES Supply volt age: 2.7V ~ 5.5V 1X, .


ISSI IS31BL3229

1.5X operating mode fade in and fade out mode Output current can be 25mA 32 cur rent level and PWM intensity control Lo w input current ripple, low EMI 90% hig h efficiency No inductors, low noise op eration Over voltage protection on outp ut Built-in thermal protection Automati c soft start Built-in thermal protectio n QFN-20 (3mm × 3mm ) package APPLICA TIONS Cell phone.


ISSI IS31BL3229

, smart phone, PDA Mp3, Mp4, PMP White L ED backlighting TYPICAL APPLICATION CI RCUIT http://www.DataSheet4U.net/ Figu re 1 Typical Application Circuit Note 1: PWM pin should be pulled high if mo dulated by EN pin only. EN pin should b e pulled high if modulated with PWM pin only. Please refer to Page 8 for detai l information. Note 2: The fade in and fade out mode is o.

Part

IS31BL3229

Description

8-LED BACKLIGHT DRIVER



Feature


IS31BL3229 8-LED BACKLIGHT DRIVER Octobe r 2012 GENERAL DESCRIPTION The IS31BL32 29 with a smart charge-pump circuit is a parallel white-LED driver with eight matched 20mA current outputs. It can su pply a total output current of 160mA ov er an input voltage range of 2.7V to 5. 5V. IS31BL3229 typically draws less tha n 1µA when placed in shutdown, and 0.7 mA when operating i.
Manufacture

ISSI

Datasheet
Download IS31BL3229 Datasheet




 IS31BL3229
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
http://www.DataSheet4U.net/
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/




 IS31BL3229
IS31BL3229
PIN CONFIGURATION
Package
Pin Configuration (Top View)
QFN-20
PIN DESCRIPTION
No. Pin
1 NC
2 VCC
3 CP2
4 CN2
5 EN
6 PWM
7
8
9
10~17
18
19
20
RSET
OPT
GND
D8~D1
OUT
CP1
CN1
Thermal Pad
Description
No connection.
Power supply input, requires 0.1μF and 1μF capacitor
connect between this pin and ground pin.
Flying capacitor positive terminal 2.
Flying capacitor negative terminal 2.
Shutdown and output current control pin. Pull low tohttp://www.DataSheet4U.net/
shutdown the IC.
PWM control pin. Adjust the LED intensity by PWM duty
cycle. Pull low at least 128ms (Typ.), the IC should be
shutdown.
External resistor for bias current.
I MAX 1.25 / RSET 1600
Option pin. Floating to operating in FIFO mode. Pull low to
disable FIFO.
Ground.
White LED channel 8~1. D1 must be connected and
others can be floating in less than 8 LEDs application.
Charge pump output to drive load circuits, Requires 1μF
capacitor connected between this pin and ground pin.
Flying capacitor positive terminal 1.
Flying capacitor negative terminal 1.
Connect to GND.
Integrated Silicon Solution, Inc. – www.issi.com
Rev.A, 09/17/2012
2
datasheet pdf - http://www.DataSheet4U.net/




 IS31BL3229
IS31BL3229
ORDERING INFORMATION
Industrial Range: -40°C to +85°C
Order Part No.
Package
IS31BL3229-QFLS2-TR
QFN-20, Lead-free
QTY/Reel
2500
http://www.DataSheet4U.net/
Copyright © 2012 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, 09/17/2012
3
datasheet pdf - http://www.DataSheet4U.net/



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