ST TDA911 Series, Примечание к применению

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Obsolete Product(s) - Obsolete Product(s)
Main Characteristics of the TDA9112 Deflection Processor Family AN1290
6/62 STMicroelectronics Confidential
Dynamic Correction
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Auto tracking with V-position and V-amplitude
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Composite Dynamic output (e.g. focus or brightness) providing:
— Horizontal Parabola with I²C control of amplitude and symmetry (except for the
TDA9115/9116)
— Vertical parabola with I²C control of amplitude (TDA9112 only).
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Extra dynamic output with programmable polarity (e.g. separate V focus)
DC/DC Converter
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Control section for DC/DC converter, based on UC 3842 architecture
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Programmable for step-up or step-down configurations
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In step-down mode, control of power P-MOS transistor without transformer, or N-MOS
transistor through transformer.
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Internal soft-start
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Can operate as open-loop converter.
Miscellaneous
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Accepts positive and negative H and V sync signals
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Accepts Composite sync signals with the automatic management of serration pulses
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Sync on Green is not extracted (this function is available in ST Video preamps)
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Vertical Moire compensation controlled by I²C programming
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Horizontal Moire compensation (I²C programming), may be optimized for combined or separate
structure (EHV/Scanning).
— TDA9112/9113/9116: self-contained
— TDA9115/9116: hardwired
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I²C bus can read Sync polarity and status, Lock/Unlock status and X-ray status (except the
TDA9115).
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I²C can reset X-ray status.
Table 1 summarizes the differences between the various family versions.
Table 1: Family Differences
Description 9112 - 9113 - 9115 - 9116 -
I²C Status reading (sync status, Lock/Unlock, X-ray) Yes Yes No Yes
Symmetrical Corner Correction Yes Yes No Yes
Asymmetric Corner Correction Yes No No No
Pin 11 function Comp DyCor Hor DyCor Moire Moire/DAC
DC/DC converter with internal sawtooth Yes No No No
I²C programmable DC/DC converter reference Yes Yes No Yes
Internal/Hardwired Moire Int Int Ext Int/Ext