STV9326 datasheet(9/14 Pages) STMICROELECTRONICS

部件名	STV9326

功能描述	Vertical Deflection Booster for 3-APPTV/Monitor Applications with 60-V Flyback Generator

PDF	14 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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9 / 14 page

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STV9326

Application Hints

4.3.1

Centring

When idle, both driver outputs provide icm and the yoke current should be null (R1 is negligible),

hence:

4.3.2

Peak Current

Scanning current should be IP when positive and negative driver outputs provide respectively

icm -ip and icm +ip, therefore

and since R7 = R2:

Choose R1 in the 1Ω range, the value of R2 = R7 follows. Remember that i is one-quarter of driver

peak-peak differential signal! Also check that the voltages on the driver outputs remain inside

allowed range.

●

Example: for icm = 0.4mA, i = 0.2mA (corresponding to 0.8mA of peak-peak differential

current), Ip =1A

Choose R1 = 0.75Ω, it follows R2 = R7 = 1.875kΩ.

4.3.3

Ripple Rejection

Make sure to connect R7 directly to the ground side of R1.

4.3.4

Secondary Breakdown Diagrams

The diagram has been arbitrarily limited to max I0 (2 A).

Figure 8: Output Transistor Safe Operating Area (SOA) for Secondary Breakdown

⋅

therefore

⋅

–

() R

⋅

() R

⋅

-----

-----------

–

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