ISL6884IAZ Intersil, ISL6884IAZ Datasheet

IC CTRLR CCFL BRIGHTNESS 20-SSOP

ISL6884IAZ

Manufacturer Part Number
ISL6884IAZ
Description
IC CTRLR CCFL BRIGHTNESS 20-SSOP
Manufacturer
Intersil
Datasheet

Specifications of ISL6884IAZ

Display Type
CCFL - Cold Cathode Fluorescent Lamp
Interface
I²C
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Supply
-
Configuration
-
Digits Or Characters
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL6884IAZ
Manufacturer:
Intersil
Quantity:
480
CCFL Brightness Controller
ISL6884 controls Pulse Width Modulated Dimming for up to
8 inverters to supply power to up to 40 Cold Cathode
Fluorescent Lamps (CCFL) for back lighting in large LCD
displays.
The ISL6884 brightness controller provides an I
for dimming control, enable, status, and brightness balance.
The duty cycle of all 8 DPWM outputs is adjusted with a
Master Brightness Control register. The duty cycle of each of
the 8 DPWM outputs can be offset from the master
brightness to adjust for uniform brightness.
The PWM dimming frequency can be set by an internal,
adjustable oscillator or synchronized to an external source to
minimize interference with video.
ISL6884’s slave address is:
• 1101_1111 for reading
• 1101_1110 for writing
Ordering Information
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
ISL6884IAZ
(See Note)
ISL6884IAZ-T
(See Note)
NUMBER
PART
TEMP. RANGE
-40 to 85
-40 to 85
(
o
C)
®
1
20 Ld SSOP
(Pb-free)
20 Ld SSOP Tape
and Reel
(Pb-free)
Data Sheet
PACKAGE
2
C interface
M20.15
M20.15
DWG. #
PKG.
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Wide Supply Voltage Range of 3.0V to 5.5V
• Dimming
• User Programmable Fault Time Out
• I
• Pb-Free Plus Anneal Available (RoHS Compliant)
Pinout
- I
- PWM dimming can be synchronized to an external
- 8 channel dimming allows the user to balance the
- User programmable fault time out
2
C Status Output
source or set by an internal, adjustable oscillator.
brightness of the CCFL lamps via I
2
C dimming control input
All other trademarks mentioned are the property of their respective owners.
March 9, 2006
DPWM_SYNC
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
LAMP_ON
OSCTEST
GNDPLL
TESTEN
PLL1
GND
SDA
SCL
EN
Copyright Intersil Americas Inc. 2006. All Rights Reserved
10
1
2
3
4
5
6
7
8
9
(20 LD SSOP)
TOP VIEW
ISL6884
20
19
18
17
16
15
14
13
12
11
2
C control
VDD
REGCAP
DPWM_8
DPWM_7
DPWM_6
DPWM_5
DPWM_4
DPWM_3
DPWM_2
DPWM_1
ISL6884
FN9265.0

Related parts for ISL6884IAZ

ISL6884IAZ Summary of contents

Page 1

... C) PACKAGE ISL6884IAZ - SSOP (See Note) (Pb-free) ISL6884IAZ-T - SSOP Tape (See Note) and Reel (Pb-free) NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

Page 2

Block Diagram VDD GND EN I2C ENABLE DPWM SYNC PLL1 GNDPLL SDA I2C interface SCL 2 ISL6884 BGREF POR ENAB fault timer PWM DIMMING PLL 8 CH DPWM GEN OSC BRIGHTNESS STATUS ENABLE (I2C) CCFL Brightness Controller REGCAP 2.5V REG ...

Page 3

Simplified System Diagram - Central Controller and Multiple Local Controllers ISL6884 CENTRAL SCL SDA CONTROLLER 3 ISL6884 SYSTEM I2C MASTER DRIVE ISL6882 IFB LOCAL VFB DPWM CONTROLLER PHASE MODULATION OUT DRIVE ISL6882 IFB LOCAL VFB DPWM CONTROLLER PHASE MODULATION OUT ...

Page 4

ISL6884 Application Schematic external hardware enable Use these parts to adjust the internal DPWM oscillator frequency 3300 2200 1uF 0.47uF 73.2K This is the LPF for the DPWM PLL 4 ISL6884 LAMPON output from ISL6882 LAMP_ON 1 TESTEN 2 GNDPLL ...

Page 5

Absolute Maximum Ratings Supply Voltage (VDD -0.3V to 6.0V Input/Output Voltage . . . . ...

Page 6

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted (Continued) PARAMETER DPWM DPWM PLL Free Run Frequency DPWM PLL Lock Frequency Lock Time DPWM Duty Cycle DPWM Duty Cycle DPWM Duty Cycle DPWM Output High DPWM Output Low DPWM Rise Time ...

Page 7

I C Register Description Register addresses and default values are given in the following Register Description Table Slave Address - ISL6884’s slave address is: • 1101_1111 for reading • 1101_1110 for writing BRT_M - Master Brightness ...

Page 8

Register Description Table Register Descriptions: NOTES denotes sign bit for 2’s compliment numbers. 2. The second row shows the register’s default value loaded at Power On Reset. TABLE 1. REGISTER DESCRIPTION TABLE (READ/WRITE REGISTERS) WORD NAME BYTE ADDRESS ...

Page 9

TABLE 1. REGISTER DESCRIPTION TABLE (READ/WRITE REGISTERS) (Continued) WORD NAME BYTE ADDRESS MSB LABEL BIT 6 LABEL POR POR VALUE POR VALUE 0x2c b7 b6 POR Maximum Fails Setting. This value determines how many consecutive I 0x2d ...

Page 10

TABLE 1. REGISTER DESCRIPTION TABLE (READ/WRITE REGISTERS) (Continued) WORD NAME BYTE ADDRESS MSB LABEL BIT 6 LABEL POR POR VALUE POR VALUE 0x37 b7 b6 POR 0 0 pwm_ PWM Sync Mode Select. sync_sel PWM_SYNC_SEL = xxxxxx00: INTERNAL ONLY. DPWM ...

Page 11

I C Bus General Description Introduction 2 (Refer to Philips I C Specification, Rev. 2.1) 2 The I C bus wire communication bus for integrated 2 circuits I2C or IIC are commonly used instead ...

Page 12

I C Transactions Between the System Master and the ISL6884 Below are typical transactions between the system master and the ISL6884. WRITING TO ONE REGISTER IN ISL6884 SCL SDA ISL6884 REGISTER ...

Page 13

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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