Quick Detail:
Digital Dimming CCFL Controller IC
Description:
The LX1686E Backlight Controller IC provides all the control
functions
needed to implement Microsemi’s direct drive inverters used to
operate
cold cathode fluorescent lamps (CCFL’s). This IC can be used to
control single or multiple-lamp configurations. CCFL’s are used for
back or edge lighting of liquid crystal flat panel displays (LCD’s)
and typically find application in notebook computers, web browsers,
automotive
and industrial instrumentation, and entertainment systems.
The LX1686E includes a PWM controlled lamp current burst circuit
that can provide a > 100:1 dimming range from a simple zero to
2.5V
potentiometer input. The PWM dimming burst rate is easily
synchronized to the LCD panel’s frame rate to prevent interference
from optical beat frequencies.
Safety and reliability features include a new dual feedback control
loop that permits regulation of maximum lamp strike voltage as well
as lamp current.
Regulating maximum lamp voltage permits the designer to provide for
ample worst case lamp strike voltage while at the same time
conservatively limit maximum open circuit voltage.
An innovative new strike voltage generation technique enables the
module designer to optimize high voltage transformer design for
maximum operating efficiency with no power dissipating overhead to
guarantee strike capability Direct drive topology is a nonresonant,
oscillator-controlled PWM regulation method. The LX1686E allows a
wide choice of fixed operating frequencies to match lamp current
frequency to the lamp’s most efficient operating point, and to
minimize high frequency interference.
Applications:
-- RangeMAX™ Wide Range Dimming (>100:1)
-- Synchronizable to Display Video Frequency
-- High Voltage Feedback Loop Directly Controls Maximum Open Lamp
-- Micro-Amp Sleep Mode
-- User Programmable Fixed Frequency Operation
-- Under-Voltage Lockout Feature With Power-Up Reset
-- Built-In Soft-Start Feature
-- Operates With 3.3V or 5V power Supplies 100mA Output Drive
Capability
Specifications:
part no. | LX1686EIPW |
Manufacturer | Microsemi Corporation |
supply ability | 10000 |
datecode | 10+ |
package | 24pin-- TSSOP |
remark | new and original stock |
Competitive Advantage:
Warranty :180 days !
Free shipping: Order over $1000 win a free shipment fee
(goods weight below 3Kg) ,during 20130901-20130930 .
Why buy from us >>> Fast / Safely / Conveniently
• Mega Source is a Stock keeper and trade company of Electronic
components .Our branches office include China, Hong Kong, Sigapore
, Canada . Offer business, service, resourcing and information for
our global member.
• Goods are ensured the highest quality possible and are delivered
to our customers all over the world with speed and precision.
How to buy >>>
• Contact us by email & sent your inquire with your Transport
destination .
• Online chat, the commissioner would be responded ASAP.
Service >>>
• Forwarder Shipment to world-wide, DHL ,TNT ,UPS,FEDEX etc. buyer
don`t need to worry about shipping problem
• We will try to respond as quickly as possible. But due to time
zone difference, please allow up to 24 hours to get your mail
replied. The products were tested by some devices or software, we
ensure that there is no quality problems.
• We are committed to providing fast, convenient and safe
transportation service to global buyer.
