This document is about the TDA4858 product manual, which introduces the features and characteristics of the product, including Full Horizontal (H) plus Vertical (V) autosync capability, Completely DC controllable for analog and digital concepts, Excellent geometry control functions, Flexible Switched Mode Power Supply (SMPS) function block for feedback and feed forward converters, X-ray protection, Start-up and switch-off sequence for safe operation of all power components, Very good vertical linearity, Internal supply voltage stabilization etc.
The TDA4858 Economy Autosync Deflection Controller (EASDC) is a high‑performance IC designed for autosync monitors. It offers full H+V autosync, DC‑controllable geometry adjustments, X‑ray protection, and a flexible switched‑mode power‑supply block. The device integrates horizontal and vertical sync processing, picture‑position control, and extensive geometry correction features.
The datasheet details the pin configuration (SDIP32 package), electrical specifications such as supply voltage 9.2‑16 V and supply current up to 49 mA, and functional blocks including PLLs, B+ control, and video clamping. Block diagrams, timing charts, and calculation notes support design and implementation of the controller in video systems.
| Supply voltage (VCC) | 9.2 – 16 V |
|---|---|
| Supply current (ICC) | 49 mA |
| Horizontal shift adjustment range (ΔHPOS) | ±10.5 % |
| Vertical size adjustment range (ΔVAMP) | 60 – 100 % |
| Operating temperature | 0 – 70 °C |
| Package | SDIP32, 32‑lead plastic shrink dual in‑line |
It is supplied in an SDIP32 plastic shrink dual in‑line package with 32 leads.
The XRAY pin provides a voltage detector that triggers a protection mode when the input voltage exceeds a set threshold.
Pin CLSEL selects the clamping pulse position: grounding CLSEL triggers on the trailing edge of horizontal sync, while connecting it to VCC triggers on the leading edge.
The horizontal shift (ΔHPOS) can be adjusted over a range of ±10.5 %.