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LM2452TB NOPB, LM2453, LM2457T

Table of contents:
Info of LM2452TB NOPB
Info of LM2453
Info of LM2457T

LM2452TB NOPB, LM2453, LM2457T Selling Leads, Datasheet

MFG:NSC Package Cooled:08+ D/C:2009+

LM2452TB NOPB, LM2453, LM2457T Datasheet download

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Part Number: LM2452TB NOPB

MFG: NSC

Package Cooled: 08+

D/C: 2009+

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LM2453 General Description

The AC2DC driver is an integrated high voltage triple CRT driver circuit designed for use in color monitor applications. The input signal interface to the IC is a multiplexed signal containing both clamp and video signal information, relative to a 1.7 VDC reference.

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

Integrated with the driver is triple clamp circuit for DC recovery 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 input 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 internally set to +73.

Also integrated within the package is a 40 VP-P vertical blanking driver that is designed to provide vertical retrace blanking on G1 of the CRT. This is a current limited, low impedance output capable of driving normal G1 decoupling capacitances via an external resistor. The output of the G1 driver can also be used to drive a voltage boost capacitor (22 F). When connected between the G1 drive output and the 120V supply input pin, a 120V boost supply is achieved which can be used to drive the internal DC clamp circuit, thereby eliminating the requirement for a 120V clamp supply.
The IC is packaged in an industry standard 15-lead TO-220 molded plastic power package.

LM2453 Maximum Ratings

Supply Voltage (V_CC) .................. +90V
Bias Voltage (_VBB) .................... +16V
Input Voltage (V_IN) ................ 0V to 4.5V
Storage Temperature Range (T_STG) ..−65°C to +150°C
Lead Temperature
(Soldering, <10 sec.) .................. 300°C
Machine Model
Model........................... 2 kV
ESD Tolerance, Human Body............ 200V

LM2453 Features

·Well matched with LM1253A video pre-amp
· Three wideband video amplifiers
· Three integrated active clamp circuits
· Convenient TO-220 staggered lead package
·Built in horizontal blanking
· Integrated 120V supply and G1 vertical blank drive circuit

LM2453 Typical Application

· 1280 x 1024 Resolution displays up to 85 Hz refresh
· Pixel clock frequencies up to 135 MHz
· Monitors requiring horizontal video blanking

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