LM2453

更新时间： 2024-09-19 22:51:55

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器商用集成电路放大器局域网
页数	文件大小	规格书
14页	826K
描述
Monolithic Triple 6 nS CRT Driver With Integrated Clamp and G1 Blanking

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LM2453 数据手册

April 2000

LM2453

Monolithic Triple 6 nS CRT Driver With Integrated Clamp

and G1 Blanking

pacitances via an external resistor. The output of the G1

driver can also be used to drive a voltage boost capacitor (22

General Description

The AC2DC driver is an integrated high voltage triple CRT

µF). When connected between the G1 drive output and the

driver circuit designed for use in color monitor applications.

120V supply input pin, a 120V boost supply is achieved

The input signal interface to the IC is a multiplexed signal

which can be used to drive the internal DC clamp circuit,

containing both clamp and video signal information, relative

thereby eliminating the requirement for a 120V clamp supply.

to a 1.7 V_DCreference.

The IC is packaged in an industry standard 15-lead TO-220

The IC contains three high gain, high input impedance, wide

molded plastic power package.

band amplifiers which directly drive the RGB cathodes of a

CRT. Each channel has its gain internally set to −52 and can

drive CRT capacitive loads as well as resistive loads present

in other applications, limited only by the package’s power

dissipation.

Features

n Low power dissipation

n Well matched with LM1253A video pre-amp

n Three wideband video amplifiers

n Three integrated active clamp circuits

n Convenient TO-220 staggered lead package

n Built in horizontal blanking

Integrated with the driver is triple clamp circuit for DC recov-

ery of each of the AC coupled outputs. The DC clamp circuit

amplifies the clamp signal that is multiplexed on the video

signal input. The DC clamp amplifiers are high gain, high in-

put impedance amplifiers, setting a low impedance DC level

at the clamp output which can be used to restore the DC

level of the cathode drive. Each channel has a gain that is in-

ternally set to +73.

n Integrated 120V supply and G1 vertical blank drive

circuit

Applications

n 1280 x 1024 Resolution displays up to 85 Hz refresh

n Pixel clock frequencies up to 135 MHz

n Monitors requiring horizontal video blanking

Also integrated within the package is a 40 V_P-Pvertical

blanking driver that is designed to provide vertical retrace

blanking on G1 of the CRT. This is a current limited, low im-

pedance output capable of driving normal G1 decoupling ca-

Block Diagram

Package Pinout

DS101302-1

FIGURE 1. LM2453 Block Diagram

DS101302-2

FIGURE 2. LM2453 Package Pinout

Order Number LM2453TA

DS101302

www.national.com

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与LM2453相关器件

型号	品牌	获取价格	描述	数据表
LM2453TA	NSC	获取价格	Monolithic Triple 6 nS CRT Driver With Integrated Clamp and G1 Blanking
LM2457	NSC	获取价格	Monolithic Triple 7.5nS CRT Driver With Integrated Clamp and G1 Blanking
LM2457TA	TI	获取价格	3 CHANNEL, VIDEO AMPLIFIER, PZFM15, TO-220, 15 PIN
LM2457TA	NSC	获取价格	IC 3 CHANNEL, VIDEO AMPLIFIER, PZFM15, TO-220, 15 PIN, Audio/Video Amplifier
LM2459	NSC	获取价格	Monolithic Single Channel 15 MHz DTV CRT Driver
LM2459TE	NSC	获取价格	Monolithic Single Channel 15 MHz DTV CRT Driver
LM2459TE/NOPB	TI	获取价格	1 CHANNEL, VIDEO AMPLIFIER, PZFM7, PLASTIC, TO-220, 7 PIN
LM246	STMICROELECTRONICS	获取价格	PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIERS
LM2460	NSC	获取价格	Monolithic Triple Channel High Swing CRT Driver
LM2460TA	NSC	获取价格	Monolithic Triple Channel High Swing CRT Driver

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