LM1290 Datasheet | National Semiconductor

Description The LM1290 is a high-performance, low-cost deflection solution for autosync monitors. The LM1290 provides full autosync capability, DC controls and plete freedom from manufacturing trims. Its continuous capture range is from 22 k Hz to 110 k Hz (1:5). Mode change frequency ramping, for protection of the horizontal deflection output transistor, is programmable by using an external capacitor. Together with the National Semiconductor LM1296 Raster Geometry Correction System for Multi-Frequency Displays, excellent performance is offered. The two-chip solution provides the advantage of good jitter performance, simplified board layout, and lower system cost. The LM1290 is packaged in a 14-pin plastic DIP package. Features n Full autosync - 22 k Hz to 110 k Hz with no ponent switching or external adjustments n No manufacturing trims needed - internal VCO capacitor trimmed on chip n Sample-and-hold circuit for fast top-of-screen phase recovery, even when using posite sync n DC-controlled H phase and duty cycle n Resistor-programmable minimum VCO frequency n Excellent jitter performance n X-ray input disables H drive until VCC powered down n Low VCC disables H drive (VCC < 8.5V) n H output transistor protected against accidental turn on during flyback n Capacitor-programmable frequency ramping, df VCO / dt, protects H output transistor during scanning mode changes Connection Diagram DS012917-1 FIGURE 1. Order Number LM1290N See NS Package Number N14A © 1999 National Semiconductor Corporation DS012917 .national. Absolute Maximum Ratings (Notes 1, 3) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) Input Voltage (VDC) Pin 1 Pins 3, 4, 5, 6 Pin 10 Pin 12 Output Sink Current, Pin 7 Power Dissipation (PD) (Above 25˚C, derate based on θJA and TJ) 15V 8V VCC 1.0V < VDC < 7.5V 10V 130 m A Thermal Resistance (θJA) Junction Temperature...