TDA8359J/N2,112

Overview

The TDA8359J is a full bridge vertical deflection output circuit in LVDMOS technology, designed for 90° and 110° color deflection systems operating at field frequencies of 25 to 200 Hz. It supports 4:3 and 16:9 picture tubes with high-efficiency Class G operation using single positive supply voltages. Key electrical parameters include a supply voltage (VP) range of 7.5 V to 18 V, a flyback supply voltage (VFB) up to 66 V, and a peak-to-peak output current capability of 3.2 A. The device features differential inputs for improved EMC performance and integrates thermal protection and guard circuits.

Feature Summary

• High efficiency fully DC-coupled vertical bridge output circuit
• Vertical flyback switch with short rise and fall times (>300 V/µs slew rate)
• Built-in guard circuit for blanking and fault signaling
• Thermal protection circuit activated at junction temperature of 170 °C

Applications

• 90° and 110° colour deflection systems
• 25 to 200 Hz field frequency applications
• 4:3 and 16:9 picture tube drives

Procurement Notes

Verify the package type matches the required PCB footprint, as the TDA8359J is available in the DBS9P (SOT523-1) plastic DIL-bent-SIL power package with an exposed die pad. Confirm that the ordering suffix corresponds to the specific lead length and packaging format intended for the assembly process. Ensure compatibility with through-hole mounting methods such as wave or dip soldering.

Selection Notes

Select this component for designs requiring a high-efficiency Class G vertical deflection output stage with minimal external components. The differential input design simplifies interfacing with TV signal processors delivering differential signals. Consider the thermal resistance characteristics (Rth(j-c) of 3 K/W) when designing heatsinking solutions to maintain junction temperatures below the 150 °C maximum limit under expected load conditions.

Part Context

The TDA8359J functions similarly to the TDA8357J but is capable of delivering higher output currents. It is constructed using Low Voltage DMOS (LVDMOS) process technology, which combines bipolar, CMOS, and DMOS devices. The use of DMOS transistors in the output stage eliminates the risk of second breakdown, enhancing reliability in deflection output applications.

Replacement Considerations

The TDA8357J is functionally similar but offers lower output current capabilities. When substituting, verify that the replacement part can handle the required peak output current and flyback supply voltage specifications for the specific deflection system design.