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DS3988T+

Description
8-Channel Cold-Cathode Fluorescent Lamp Controller
CategoryPower/power management    The power supply circuit   
File Size435KB,23 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

DS3988T+ Overview

8-Channel Cold-Cathode Fluorescent Lamp Controller

DS3988T+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeQFP
package instructionTFQFP, TQFP48,.35SQ
Contacts48
Reach Compliance Codeunknown
ECCN codeEAR99
Factory Lead Time1 week
Analog Integrated Circuits - Other TypesPOWER FACTOR AND FLUORESCENT LIGHT CONTROLLER
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage4.5 V
Nominal input voltage5 V
JESD-30 codeS-PQFP-G48
JESD-609 codee3
length7 mm
Number of functions1
Number of terminals48
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeTFQFP
Encapsulate equivalent codeTQFP48,.35SQ
Package shapeSQUARE
Package formFLATPACK, THIN PROFILE, FINE PITCH
Peak Reflow Temperature (Celsius)260
power supply5 V
Certification statusNot Qualified
Maximum seat height1.2 mm
Nominal supply voltage (Vsup)5 V
surface mountYES
Switch configurationSINGLE
Maximum switching frequency80 kHz
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width7 mm
Base Number Matches1
Rev 0; 4/05
8-Channel Cold-Cathode
Fluorescent Lamp Controller
General Description
The DS3988 is an 8-channel controller for cold-cathode
fluorescent lamps (CCFLs) used to backlight liquid
crystal displays (LCDs) in TV and PC monitor applica-
tions. The DS3988 supports configurations of 1 to 8
lamps, and multiple DS3988 controllers can be cascad-
ed to support applications requiring more than 8 lamps.
Features
High-Density CCFL Controller for LCD TV and PC
Monitor Backlights
Can Be Easily Cascaded to Support More Than
8 Lamps
Minimal External Components
Analog Brightness Control
Per-Channel Lamp Control Ensures Equal
Brightness Among Lamps and Maximizes Lamp
Life
Gate Driver Phasing Minimizes DC Supply Current
Surges
Per-Channel Lamp Fault Monitoring for Lamp
Open, Lamp Overcurrent, Failure to Strike, and
Overvoltage Conditions
Accurate (±5%) Independent On-Board Oscillators
for Lamp Frequency (40kHz to 80kHz) and DPWM
Burst Dimming Frequency (22.5Hz to 440Hz)
Can Be Synchronized to External Sources for the
Lamp and DPWM Frequencies
<10% to 100% Dimming Range
Programmable Soft-Start Minimizes Audible
Transformer Noise
DS3988
Applications
LCD Televisions
LCD PC Monitors
Ordering Information
PART
DS3988T
DS3988T+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
48 TQFP
48 TQFP
+Denotes
lead-free package.
Pin Configuration
SVM
BRIGHT
PSYNC
A0
LOSC
LSYNC
GND
POSC
48
V
CC
47
46
45
44
43
42
41
40
39
38
37
SDA
TOP VIEW
FAULT
SCL
GA1
GB1
LCM1
OVD1
GA2
GB2
LCM2
OVD2
GA3
GB3
LCM3
OVD3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
36
35
34
33
32
31
30
29
28
27
26
25
OVD8
LCM8
GB8
GA8
OVD7
LCM7
GB7
GA7
OVD6
LCM6
GB6
GA6
I
2
C-Compatible Serial Port and On-Board
Nonvolatile (NV) Memory Allow Device
Customization
8-Byte NV User Memory for Storage of Serial
Numbers and Date Codes
4.5V to 5.5V Single-Supply Operation
-40°C to +85°C Temperature Range
48-Lead TQFP (7mm x 7mm) Package
DS3988
48-LEAD TQFP
7 x 7 x 1.0mm
Typical Operating Circuit appears at end of data sheet.
GB5
LCM5
OVD5
V
CC
GND
GA4
GB4
LCM4
OVD4
GND
GA5
GND
______________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

DS3988T+ Related Products

DS3988T+ DS3988
Description 8-Channel Cold-Cathode Fluorescent Lamp Controller 8-Channel Cold-Cathode Fluorescent Lamp Controller

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