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| ICs for TV AN5790N, AN5792 Horizontal Signal Processing ICs for CRT Display s Overview The AN5790N and AN5792 are the intergrated circuits designed for CRT display horizontal signal processing circuits. AN5790N 7.90.3 12 11 10 9 8 7 6 5 4 3 2 1 + 0.1 0.45 - 0.05 Unit : mm 3.50.25 1.20.25 s Features * Horizontal synchronous signal is available in both polarities. 29.40.3 * Wide range of horizontal osciallation frequency : 14kHz to 60kHz. * Output pulse width : 2s to 40s * Package AN5790N...NF-12S(12-Pin SIL plastic package) AN5792...F-12S (12-Pin SIL plastic package with fin) 2.54 1.70.25 1.70.25 12-Pin SIL Plastic Package (12-SIP) AN5792 5.80.25 7.90.3 12 11 10 9 8 7 6 5 4 3 2 1 3.50.25 1.20.25 0.50.1 1.20.25 Unit : mm o3.3 0.50.1 1.20.25 28.00.3 + 0.1 0.45 - 0.05 1.70.25 1.70.25 12-Pin SIL Plastic Package with Fin (12-SIF (f)) s Block Diagram VCC 6 5 1 2 Polarity Switch X-ray Protector Pre-Amp. 8 AFC Hor. Osc. PulseWidth Adjustment 7 GND 3 4 12 11 9 10 29.40.3 2.54 AN5790N, AN5792 s Absolute Maximum Ratings (Ta= 25C) Parameter Supply voltage Supply current Power dissipation Temperature Operating ambient temperature Storage temperature Symbol VCC ICC PD Topr Tstg Rating 13.2 50 1140 - 20 to +70 - 40 to +150 ICs for TV Unit V mA mW C C s Electrical Characteristics (Ta= 25C) Parameter Total circuit current Polarity switching voltage (1) Polarity switching voltage (2) Horizonal oscillation start voltage Horizonal oscillation frequency Horizonal oscillation frequency fHO supply voltage dependency fHO ambient temperature dependency Oscillation frequency control sensitivity DC loop gain Output pulse width Output pulse width Output pulse width variation to supply voltage change Symbol Itot V2-7 V2-7 VOSC-S (H) fHO (1) fHO (2) fHO/VCC fHO/Ta fDC HO (1) HO (2) HO/VCC HO/Ta V8-7 I8-7 V6-7 VCC=11V Condition Positive polarity signal input Negative polarity signal input fHO=12kHz to 19kHz VCC=11V, C= 4400pF VCC=11V, C= 820pF, 5600pF fHO=15.75kHz, fHO | 9.9V- fHC | 12.1V fHO=15.75kHz, fHO | -20C - fHC | 60C IO= 25A x VCC=11V, R= 20k, C= 6800pF VCC=11V, R=20k, C=330pF, 18000pF VCC= 9.9V to 12.1V VCC=11V, Ta= - 20C to + 60C VCC=11V, V10-7=1V VCC=11V, V10-7=1V VCC=11V min 30 0 2.5 7.5 15 14 typ 45 max 60 0.4 5.5 Unit mA V V V kHz kHz Hz Hz Hz/A Hz/s s s % % V mA V 15.75 40 16.5 60 130 260 19.3 21.2 40 5 5 2 16 17.8 2 17.6 700 19.4 Output pulse width variation to temeprature change Oscillation output saturation voltage Oscillation output drive current X-ray protecting circuit operation start voltage 300 0.5 0.64 0.75 s Application Circuit AN5790N/AN5792 220F/16V 39pF FBK Pulse Input 33k 0.015F Hor. Sync. Signal + - VCC (11V) 4.7F + - 3.3k + - 33F/50V 1 2 3 4 5 6 7 8 Output 9 10 11 12 0.018F 20k 27k 2700pF 2700pF (Styrol Cap.) (Mylar Film Cap.) 2.7k 2k 0.033F ICs for TV AN5790N, AN5792 s Pin Descriptions Pin No. Pin name Typ. waveform Description Equivalent circuit 4k 5V 1 Horizontal synchronous signal input pin 5V 0V Pin for inputting a horizontal synchronous signal. 1 4k 5V 2 Polarity discrimination switching pin DC Both polarities of an input signal of Pin1 are made available by connecting this pin to GND or setting it to OPEN 2 3 Flyback pulse input pin Flyback feedback pin. The standard value of amplitude is 1.5Vpp. 3 5.9V 4 AFC output pin DC Result of AFC detection. 4 5 Supply voltage DC 6 X-ray protecting circuit input pin DC When a voltage of 0.75V or more is applied, no horizonal output will not be generated. 6 200 7 GND DC 8 8 Horizontal drive output pin Current when turned ON should be used at 300mA or less. 2 680 AN5790N, AN5792 s Pin Descriptions (cont.) Pin No. Pin name Typ. waveform Description 10 9 Trigger input pin The output pulse width can be changed by the capacitance between Pins9 and 10 and resistance berween Pin10 and VCC. 10 Pulse width adjusting pin 1k ICs for TV Equivalent circuit 9 11 Sawtooth wave generating pin Oscillation frequency can be changed by the capacitor to be connected to this pin. 11 12 Horizontal oscillation circuit reference voltage DC Oscillation frequency is changed by the resistor between this pin and GND. 12 3.3V |
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