Philips Semiconductors

Product specification

 

 

Triple video output amplifier

TDA6107JF

 

 

Cathode output

Dissipation

The cathode output is protected against peak current (caused by positive voltage peaks during high-resistance flash) of 3 A maximum with a charge content of 100 μC (1).

The cathode is also protected against peak currents (caused by positive voltage peaks during low-resistance flash) of 6 A maximum with a charge content of 100 nC (1).

The DC voltage of VDD (pin 6) must be within the operating range of 180 to 210 V during the peak currents.

Flashover protection

The TDA6107JF incorporates protection diodes against CRT flashover discharges that clamp the cathodes output voltage up to a maximum of VDD + Vdiode.

To limit the diode current an external 1.5 kΩ carbon high-voltage resistor in series with the cathode output and a 2 kV spark gap are needed (for this resistor value, the CRT has to be connected to the main PCB (1).

VDD must be decoupled to GND:

1.With a capacitor >20 nF with good HF behaviour (e.g. foil); this capacitor must be placed as close as possible to pins 6 and 4, but definitely within 5 mm.

2.With a capacitor >3.3 μF on the picture tube base print, depending on the CRT size.

Switch-off behaviour

The switch-off behaviour of the TDA6107JF is controllable. This is because the output pins of the TDA6107JF are still under control of the input pins for low power supply voltages (approximately 30 V and higher).

Bandwidth

The addition of the flash resistor produces a decreased bandwidth and increases the rise and fall times; see “Application Note AN96072”.

(1)External protection against higher currents is described in “Application Note AN96072”.

Regarding dissipation, distinction must first be made between static dissipation (independent of frequency) and dynamic dissipation (proportional to frequency).

The static dissipation of the TDA6107JF is due to voltage supply currents and load currents in the feedback network and CRT.

The static dissipation Pstat equals:

Pstat = VDD × IDD + 3 × VOC × IOC

Where:

VDD = supply voltage

IDD = supply current

VOC = DC value of cathode voltage

IOC = DC value of cathode current.

The dynamic dissipation Pdyn equals:

Pdyn = 3 × VDD × (CL + Cint) × fi × Voc(p-p) × δ

Where:

CL = load capacitance

Cint = internal load capacitance (≈4 pF)

fi = input frequency

Voc(p-p)= output voltage (peak-to-peak value)

δ= non-blanking duty cycle.

The IC must be mounted on the picture tube base print to minimize the load capacitance CL.

2002 Oct 18

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Philips TDA6107JF manual Cathode output Dissipation, Flashover protection, Switch-off behaviour, Bandwidth
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TDA6107JF specifications

The Philips TDA6107JF is a state-of-the-art video output integrated circuit (IC) designed for use in various consumer and professional electronics. It's particularly popular in television applications and display systems, showcasing advanced features that enhance image quality and performance.

One of the main features of the TDA6107JF is its ability to handle RGB video signals with exceptional fidelity. It supports a wide range of signal input levels, which makes it versatile for different types of video data. This allows devices using the IC to achieve vibrant colors and clear images, appealing to both casual viewers and professionals who demand high-quality video output.

The TDA6107JF incorporates sophisticated technologies including built-in amplification, enabling users to drive the display directly without needing additional external components. This integration simplifies circuit design, reducing the overall component count and potential points of failure within a system. As a result, manufacturers can create more compact and cost-effective designs while still delivering high performance.

In terms of characteristics, the TDA6107JF is distinguished by its low power consumption, which is essential for battery-operated devices. Enhanced efficiency also leads to reduced heat generation, ensuring longevity and reliability in performance. It operates over a wide voltage range, making it compatible with various power supply systems, which further broadens its applications.

Moreover, the TDA6107JF boasts excellent linearity and low distortion, which is crucial for maintaining the integrity of video signals during processing. This precision results in a clearer image with fewer artifacts, thereby enhancing the overall viewing experience.

Additionally, the TDA6107JF is equipped with features such as color burst extraction and adjustable gain settings, providing flexibility for different use cases. This means that manufacturers can tailor their devices to meet specific market needs or consumer preferences.

Overall, the Philips TDA6107JF represents a significant advancement in video output technology, merging functionality and performance in a single package. Its combination of features, efficiency, and reliability makes it an essential component in the world of display technology, underpinning its widespread adoption in modern electronic devices. As video and display standards evolve, the TDA6107JF continues to be a relevant and essential player in this competitive landscape.
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