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 |
