Datasheet Linear Technology LT1768

Manufacturer	Linear Technology
Series	LT1768

High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime

Datasheets

PDF, 305 Kb, Revision: S, File uploaded: Sep 3, 2017

Extract from the document

Packaging

	LT1768CGN#PBF	LT1768CGN#TRPBF	LT1768IGN#PBF	LT1768IGN#TRPBF
N	1	2	3	4
Package	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing
Package Code	GN	GN	GN	GN
Package Index	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)
Pin Count	16	16	16	16

Parametrics

Parameters / Models	LT1768CGN#PBF	LT1768CGN#TRPBF	LT1768IGN#PBF	LT1768IGN#TRPBF
Demo Boards	DC354A	DC354A	DC354A	DC354A
Export Control	no	no	no	no
Integrated Inductor	no	no	no	no
Isupply, mA	7	7	7	7
Monolithic	no	no	no	no
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 70	0 to 70	-40 to 85	-40 to 85
Polyphase	no	no	no	no
Switch Current, A	1.5	1.5	1.5	1.5
Synchronous	no	no	no	no
Topology	CCFL	CCFL	CCFL	CCFL
Topology 1	CCFL	CCFL	CCFL	CCFL
Vin Max, V	24	24	24	24
Vin Min, V	8	8	8	8
Vout Max, V	60	60	60	60

Eco Plan

	LT1768CGN#PBF	LT1768CGN#TRPBF	LT1768IGN#PBF	LT1768IGN#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
High Power Desktop LCD Backlight Controller Supports Wide Dimming Ratios While Maximizing Lamp Lifetime &mdash DN264
PDF, 79 Kb, File published: Aug 1, 2001
Extract from the document
High Power Desktop LCD Backlight Controller Supports Wide
Dimming Ratios While Maximizing Lamp Lifetime вЂ“ Design Note 264
Rich Philpott
Introduction
Liquid crystal displays (LCDs), long standard in laptop
computers and handheld instruments, are gaining
in popularity as desktop computer displays. Larger
displays require multiple high power cold cathode
п¬‚uorescent lamps (CCFLs). The lamps must have a
dimming range and life expectancy comparable to
those of previous generations of desktop displays. To
achieve maximum lamp lifetime and dimming range
while maintaining efп¬Ѓciency, CCFL drive should be
sinusoidal, contain zero DC component, and not exceed
the CCFL manufacturerвЂ™s current ratings. Providing a
low crest-factor sinusoidal CCFL drive also maximizes
current-to-light conversion efп¬Ѓciency, reduces display
п¬‚icker and minimizes EMI and RFI emissions. The
LTВ®1768 high power CCFL controller, with its unique
Multimode Dimming, provides the necessary drive to
enable a wide dimming range, while maximizing lamp
lifetime. LT1768 Dual CCFL Backlight Inverter
The circuit in Figure 1 is a dual, grounded-lamp backlight inverter that operates from an input of 9V to 24V, …

Articles

Download
High Power Desktop CCFL Controller Enables Wide Dimming Ratios while Maximizing Lamp Lifetime &mdash LT Journal
PDF, 156 Kb, File published: May 1, 2001
Extract from the document
DESIGN FEATURES High Power Desktop CCFL Controller
Enables Wide Dimming Ratios while
by Rich Philpott
Maximizing Lamp Lifetime
LT1768 Dual CCFL
Liquid crystal displays (LCDs), long from 200V to 800V. A CCFL can oper-Backlight Inverter
Introduction standard in laptop computers and
handheld instruments, are gaining in
popularity as desktop computer displays. In the larger sizes required for
desktop monitor applications, providing uniform backlighting for LCDs
requires multiple, high power lamps.
In addition, the lamps must have a
dimming range and life expectancy
comparable to those of previous generations of desktop displays. Cold
cathode fluorescent lamps (CCFLs)
provide the highest available efficiency
for backlighting LCD displays. The
CCFL requires a high voltage supply
for operation. Typically, over 1000
volts is required to initiate CCFL
operation, with sustaining voltages ate from DC, but migration effects
damage the CCFL and shorten its
lifetime. To achieve maximum life, …

Model Line

Series: LT1768 (4)

LT1768CGN#PBF LT1768CGN#TRPBF LT1768IGN#PBF LT1768IGN#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > LCD/CCD/OLED Bias

Slices

Microcontrollers