Part # Application Note Imaging datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: How to Use the TDA911X and Improve Performances


Part Details:

==> ./downloads/Application Note Imaging s.html AN1290 ® Application Note How to Use the TDA911X and Improve Performances TDA911x Deflection Processors at a Glance The TDA911x is a family of deflection processors for multisync monitors, incorporating horizontal and vertical processing, geometry correction, dynamic corrections (focus and/or brightness etc.), DC/DC conversion and various safety and auxiliary functions. They are entirely controlled through an I²C interface. The TDA9112 was designed as an upgrade of the TDA9109/9111, using the same 32-pin shrink DIP package. The pin-out remains nearly the same in order to simplify new layouts; however some minor changes were necessary, mainly to pack more functions inside. Those already familiar with TDA9109/9111 will recognize all the functions and operation styles they are accustomed to use. For low- and medium-range applications where certain sophisticated features are not required, several different economical versions of the TDA9112 are available: TDA9113, TDA9115 and TDA9116. Table 1 summarizes their respective features. All versions are pin- and software-compatible, with minor exceptions1. Recently, the most complete version of the TDA9112 has been upgraded into the higher performance TDA9112A. Improvements concern mainly geometry and focus corrections, but also jitter behavior, B+ function, safety and I²C control. The design guidelines provide that the TDA9112A should operate at once when fitted in the place of an existing TDA9112 (even if the ideal I²C register settings may differ slightly). Section 2: Special Features of the TDA9112A summarizes the improvements incorporated in TDA9112A. For a detailed description of each, please refer to the relevant chapters. Obsolete Product(s) - Obsolete Product(s) 1. Hard-wired H Moire function of the TDA9115/9116 replaces the Focus/Brightness functions. 16 Septembre 2002 Revision 1.1 1/62 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. AN1290 Table of Contents Chapter 1 Main Characteristics of the TDA9112 Deflection Processor Family . . . . . . . . .5 Chapter 2 Special Features of the TDA9112A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Chapter 3 TDA9112 Family Pin Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Chapter 4 Horizontal Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 4.1 Theory of Operation ........................................................................................................... 11 4.1.1 Horizontal Section Structure ..............................................................................................................11 4.1.2 Digital Sync Detection ........................................................................................................................12 4.1.3 Composite Sync .................................................................................................................................12 4.1.4 Voltage-controlled Oscillator ..............................................................................................................12 4.1.5 PLL1 ..................................................................................................................................................13 4.1.6 Free-running Frequency and Range ..................................................................................................13 4.1.7 Frequency Precision ..........................................................................................................................14 4.1.8 PLL1 Inhibition ...................................................................................................................................15 4.1.9 Frequency Change Speed Limitation .................................................................................................16 4.1.10 PLL2, Duty Factor, ON/OFF ...............................................................................................................16 4.1.11 Soft-start ............................................................................................................................................17 4.1.12 Output Stage ......................................................................................................................................17 4.1.13 X-ray Protection .................................................................................................................................17 4.1.14


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