Vertical Output ICs

LA7847/48

Overview

The LA7847 and LA7848 are EW drive and vertical deflection output ICs for high-definition TV and CRT displays in systems that use a bus control system signal-processing IC. These ICs can directly drive (including DC component) the deflection yoke from the sawtooth wave output from the bus control system signal-processing IC. Similarly, the diode modulator block can be driven from the parabolic wave output.

The color TV vertical deflection system and EW adjustment functions can be controlled from the bus system when either of these ICs is used in conjunction with a Sanyo LA768X or LA769XX series TV bus control system signal-processing IC. The LA7847 provides a maximum output block voltage of 72 V, a maximum deflection current of 2.2 A p-p, and an EW drive current of 0.4 A, and thus is optimal for large diameter CRTs. The LA7848 provides a maximum output block voltage of 92 V, a maximum deflection current of 2.2 A p-p, and an EW drive current of 0.4 A, and thus is optimal for large diameter CRTs.

Functions

Built-in charge pump circuit for low power operation

Vertical output circuit

Excellent crossover characteristics

Supports DC coupling

EW drive circuit

Package: SIP10HD

Block Diagram

 

 

 

 

 

Pump UP

 

 

 

 

 

 

 

-

 

 

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

AMP

 

 

 

 

 

 

 

 

 

 

+

 

 

 

-

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

9

10

GND

Ver.OUTPUT

CC

NON INV.INPUT

INVERTING INPUT

CC

PUMP UP OUT

NON INV.INPUT(EW)

INVERTING INPUT(EW)

EW OUT

OUTPUT STAGE V

V

Vertical Output IC

LA7849

Overview

The LA7849 is an EW drive and vertical deflection output IC for high-definition TV and CRT displays in systems that use a bus control system signal-processing IC. This IC can directly drive (including the DC component) the deflection yoke from the sawtooth wave output from the bus control system signal-processing IC. Similarly, the diode modulator block can be driven from the parabolic wave output.The color TV vertical deflection system and EW adjustment functions can be controlled from the bus system when this IC is used in conjunction with a Sanyo LA768X or LA769XX series TV bus control system signal-processing IC.

The LA7849 provides a maximum output block voltage of 92 V, a maximum deflection current of 2.2 A p-p, and an EW drive current of 0.4 A, is provided in an SIP10H package, and thus is optimal for large diameter CRTs.

Functions

Built-in charge pump circuit for low power operation

Vertical output circuit

Excellent crossover characteristics

Supports DC coupling

EW drive circuit

Package: SIP10H

Block Diagram

 

 

 

 

 

Pump UP

 

 

 

 

 

 

 

-

 

 

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

AMP

 

 

 

 

 

 

 

 

 

 

+

 

 

 

-

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

9

10

GND

Ver.OUTPUT

CC

NON INV.INPUT

INVERTING INPUT

CC

PUMP UP OUT

NON INV.INPUT(EW)

INVERTING INPUT(EW)

EW OUT

OUTPUT STAGE V

V

33 SANYO TV . VCR

SANYO TV . VCR 34

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Image 18
Sanyo EP58B specifications LA7847/48, LA7849