LA78040B The Vertical Deflection Output IC With Bus Control Support for TVs and CRT Display TO-220-7
The LA78040B is a vertical deflection output IC for TVs and CRT displays with excellent image quality that use a BUS control system signal processing IC. This IC can drive the direct (even including a DC component) deflection yoke with the saw tooth wave output from the BUS control system signal processing IC.
Features :
- Low Power Dissipation: Equipped with a built-in pump-up circuit that minimizes power consumption, making it energy-efficient.
- Integrated Vertical Output Circuit: Simplifies design by incorporating essential vertical deflection components into a single IC.
- Built-in Thermal Protection Circuit: Ensures safe operation by protecting the IC from overheating, enhancing longevity and reliability.
- Excellent Crossover Characteristics: Provides smooth transitions and reduces distortion, contributing to high-quality image reproduction.
Specifications :
Note: Current flowing into the IC is positive (+) and current flowing out is negative (-).
| Parameter | Symbol | Conditions | Ratings | Unit |
|---|---|---|---|---|
| Maximum Ratings | ||||
| Pump-up block supply voltage | +B2 max | – | 34 | V |
| Output block supply voltage | +B6 max | – | 70 | V |
| Allowable power dissipation | Pd max | Mounted on an arbitrarily large heat sink | 9 | W |
| Deflection output current | I5 max | – | -1.4 to +1.4 | A p-o |
| Thermal resistance | θj-c | – | 3 | °C/W |
| Operating temperature | – | – | -20 to +85 | °C |
| Storage temperature | Tstg | – | -40 to +150 | °C |
| Operating Conditions | ||||
| Recommended supply voltage | +B2 | – | 24 | V |
| Operating supply voltage range | +B2 op | – | 16 to 33 | V |
| Deflection output current | I5 p-p | – | up to 1.8 | A p-p |
| Operating Characteristics | ||||
| Deflection output saturation voltage (lower) | Vsat5-4 | I5 = 0.9 A | – – 1.3 | V |
| Deflection output saturation voltage (upper) | Vsat6-5 | I5 = -0.9 A | – – 3.2 | V |
| Pump-up charge saturation voltage | Vsat3-4 | I3 = 20 mA | – – 1.8 | V |
| Pump-up discharge saturation voltage | Vsat2-3 | I3 = -0.9 A | – – 3.0 | V |
| Idling current | Idl | – | 20 – 50 | mA |
| Midpoint voltage | Vmid | – | 11.0 12.0 13.0 | V |
Applications :
- Televisions (TVs)
- CRT Displays
- Bus Control Systems
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