Sanyo EP58B specifications LA78045, LA7875N/76N

Vertical Output IC

LA78045

Overview

The LA78045 is a 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. The color TV vertical deflection system adjustment function 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 LA78045 provides a maximum deflection current of 2.2 A p-p, and thus is optimal for large diameter CRTs, and can drive the CRTs used in TV sets in the 33 to 37 inch range.

Functions

Low power operation achieved by using integrated charge pump circuit

Vertical output circuit

Thermal protection circuit

Excellent crossover characteristics

Supports DC coupling

Package: TO220-7H

Block Diagram

Thermal					Pump UP
Protection
				-
			AMP
				+
1	2	3	4	5	6	7
GND	Ver.OUTPUT	CC	NON INV.INPUT	INVERTING INPUT	CC	PUMP UP OUT
		OUTPUT STAGE V			V

Vertical Output ICs

LA7875N/76N

Overview

The LA7875N and LA7876N were developed for Internet TVs and high-definition TVs that require a narrow vertical retrace period. In these products, SANYO succeeded in achieving a narrow vertical retrace period by adopting a new 3_ step-up charge pump circuit. Since this allows the supply voltage to be lowered relative to the earlier 2_ step-up ICs, it achieves significantly lower power in end product designs.

Furthermore, since 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, the shift operation required by wide-screen TV sets can be controlled over the bus control system.The LA7875N provides a maximum deflection current of 2.2 A p-p, and thus is optimal for medium diameter CRTs, and the LA7876N provides a maximum deflection current of 3.0 A p-p, and thus is optimal for large diameter CRTs.

Functions

3 voltage step up charge pump circuit

Low power operation

Operational amplifier type vertical output circuit

Supports DC direct coupling deflection yoke drive

Excellent crossover characteristics

Packages: LA7875N: SIP10HD

LA7876N: SIP10H

Block Diagram

Pump UP1

AMP	-
		Pump UP2
	+

1	2	3	4	5	6	7	8	9	10
N.C	GND	Ver.OUTPUT	CC	NONINV.INPUT	INVERTINGINPUT	CC	PUMP1stUP OUT	CC	PUMP2ndUP OUT
			STAGEOUTPUTV			V		V
								2

31 SANYO TV . VCR SANYO TV . VCR 32