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DS3991Z+PP/V

Description
IC CTRLR CCFL PUSH-PULL 16-SOIC
CategoryPower/power management    The power supply circuit   
File Size466KB,16 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

DS3991Z+PP/V Overview

IC CTRLR CCFL PUSH-PULL 16-SOIC

DS3991Z+PP/V Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerMaxim
Reach Compliance Codecompliant
ECCN codeEAR99
Samacsys DescriptionLow-cost CCFL Controller
Analog Integrated Circuits - Other TypesFLUORESCENT LIGHT CONTROLLER
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Maximum time at peak reflow temperatureNOT SPECIFIED
Base Number Matches1
Rev 1; 2/08
Low-Cost CCFL Controller
General Description
The DS3991 is a controller for cold-cathode fluorescent
lamps (CCFLs) that are used to backlight liquid-crystal
displays (LCDs). The DS3991 is available for both
push-pull and half-bridge drive topologies.
The DS3991 converts a DC voltage (5V to 24V) to the
high-voltage (300V
RMS
to 1400V
RMS
) AC waveform that
is required to power the CCFLs. The push-pull and half-
bridge drive schemes use a minimal number of external
components, which reduces component and assembly
cost and makes the printed circuit board (PCB) design
easy to implement. Both drive schemes provide an effi-
cient DC to AC conversion and produce near-sinu-
soidal waveforms.
Features
CCFL Controller for Backlighting LCD Panels
Minimal External Components Required
Lamp Fault Monitoring for Lamp-Open, Lamp-
Overcurrent, Failure-to-Strike, and Overvoltage
Conditions
Accurate (±5%) On-Board Oscillator for Lamp
Frequency (40kHz to 80kHz)
Accurate (±5%) On-Board Oscillator for DPWM
Burst-Dimming Frequency (80Hz to 300Hz)
Device Supply Undervoltage Lockout
Inverter Supply Undervoltage and Overvoltage
Lockouts
Soft-Start on Burst-Dimming Minimizes Audible
Transformer Noise
Strike Frequency Boost
100% to < 10% Dimming Range
Low Cost
Single-Supply Operation Range: 4.5V to 5.5V
Temperature Range: -40°C to +85°C
16-Pin SO Package (150 mils)
DS3991
Applications
LCD PC Monitors
LCD TVs
Ordering Information
PART
DS3991Z+PP
DS3991Z+T&R/PP
DS3991Z+HB
DS3991Z+T&R/HB
CONFIGURATION
Push-Pull
Push-Pull
Half-Bridge
Half-Bridge
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
DIMMING FREQUENCY RANGE (Hz)
80 to 300
80 to 300
80 to 300
80 to 300
PIN-PACKAGE
16 SO (150 mils)
16 SO (150 mils)
16 SO (150 mils)
16 SO (150 mils)
+Denotes
a lead-free package.
T&R = Tape and reel.
TOP VIEW
SLOPE 1
VCC 2
Pin Configuration
16 SVML
15 SVMH
14 VCC
13 GND
Typical Operating Circuits appear at end of data sheet.
VCC 3
VCC 4
LOSC 5
POSC/PWM 6
BRIGHT 7
PWM_EN 8
DS3991
12 OVD
11 LCM
10 GB
9 GA
SO
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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