UCC3973PWTRG4 datasheet(5/24 Pages) TI1

Teilenummer	UCC3973PWTRG4

Bauteilbeschribung	BiCMOS Cold Cathode Fluorescent Lamp Driver Controller

Download	24 Pages

Scroll/Zoom	100%

Hersteller	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

Logo

5 / 24 page

5

UCC1972/3

UCC2972/3

UCC3972/3

UDG-98154

*MODE

Output

Open Lamp

Detection

S2

Error Amplifier Output

S1

<1V

OFF

DISABLED

OPEN

DISCONNECTED FROM COMP

OPEN

1V< MODE< 3V

ON

DISABLED

OPEN

CONNECTED TO COMP

CLOSED

>3V

ON

ENABLED

CLOSED

CONNECTED TO COMP

CLOSED

8

5

3

4

2

1

7

6

VDD

20µA

+

–

+

–

1.5V

ERROR

AMPLIFIER

S1

R

Q

S

R

Q

S

+

–

+

–

1.0V

7.0V

SYNC

OUT

RAMP

0.2V

OSCILLATOR

*MODE

SELECT

UVLO

4.0V/3.8V

3V REF

VREF

UVLO=1

3BIT

UP-DOWN

COUNTER

S2

FROM MODE SELECT

OPEN LAMP DETECT

COMPARATOR

ZERO DETECT

COMPARATOR

UVLO

PWM

UVLO

OUTPUT OFF

(FROM MODE SELECT)

VDD

MODE

COMP

FB

GND

OUT

BUCK

VDD

VBAT

18V

+

–

TO S3

OVER-VOLTAGE

CLAMP COMPARATOR

S3

(ALWAYS OPEN ON UCC3972)

FROM

CLAMP

COMP

ICLAMP

9.0V

BLOCK DIAGRAM

Introduction

Cold Cathode Fluorescent Lamps (CCFL) are frequently

used as the backlight source for Liquid Crystal Displays

(LCDs). These displays are found in numerous applica-

tions such as notebook computers, portable instrumenta-

tion,

automotive

displays,

and

retail

terminals.

Fluorescent lamps provide superior light output effi-

ciency, making their use ideal for power sensitive porta-

ble applications where the backlight circuit can consume

a significant portion of the battery’s capacity. The

backlight converter must produce the high voltage

needed to strike and operate the lamp. Although CCFLs

can be operated with a DC voltage, a symmetrical AC

operating voltage is recommended to maintain the rated

life of the lamp. Sinusiodal voltage and current lamp

waveforms are also recommended to achieve optimal

electrical to light conversion and to reduce high voltage

electromagnetic interference (EMI). A topology that pro-

vides these requirements while maintaining efficient op-

eration is presented below.

APPLICATION INFORMATION

Ähnliche Beschreibung - UCC3973PWTRG4

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Texas Instruments	UCC1972	308Kb / 17P	[Old version datasheet] BiCMOS Cold Cathode Fluorescent Lamp Driver Controller
Texas Instruments	UCC1972	895Kb / 24P	[Old version datasheet] BiCMOS Cold Cathode Fluorescent Lamp Driver Controller
Monolithic Power System...	MP1010B	35Kb / 1P	Cold Cathode Fluorescent Lamp Driver
Monolithic Power System...	MP1011A	128Kb / 6P	Cold Cathode Fluorescent Lamp Driver
Texas Instruments	UCC2974	229Kb / 14P	[Old version datasheet] DUAL COLD CATHODE FLUORESCENT LAMP CONTROLLER
Texas Instruments	UCC3974	210Kb / 12P	[Old version datasheet] DUAL COLD CATHODE FLUORESCENT LAMP CONTROLLER
Dallas Semiconductor	DS3984	790Kb / 24P	4-Channel Cold-Cathode Fluorescent Lamp Controller
Maxim Integrated Produc...	DS3988	778Kb / 23P	8-Channel Cold-Cathode Fluorescent Lamp Controller Rev 0; 4/05
	DS3984	508Kb / 24P	4-Channel Cold-Cathode Fluorescent Lamp Controller Rev 1; 5/07
	DS3994	537Kb / 28P	4-Channel Cold-Cathode Fluorescent Lamp Controller Rev 0; 10/06

More results

UCC3973PWTRG4 Datenblatt(PDF) 5 Page - Texas Instruments

UCC3973PWTRG4 Datenblatt(HTML) 5 Page - Texas Instruments

Ähnliche Teilenummer - UCC3973PWTRG4

Ähnliche Beschreibung - UCC3973PWTRG4

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Datenblatt Download

Link URL