ICs for TV AN5790N, AN5792 Horizontal Signal Processing ICs for CRT Display ■ Overview AN5790N Unit : mm The AN5790N and AN5792 are the intergrated circuits designed for CRT display horizontal signal processing circuits. 3.5±0.25 1.2±0.25 7.9±0.3 29.4±0.3 • Horizontal synchronous signal is available in both polarities. • Wide range of horizontal osciallation frequency : 14kHz 2.54 ■ Features 0.5±0.1 1.2±0.25 12 11 10 9 8 7 6 5 4 3 2 1 to 60kHz. • Output pulse width : 2µs to 40µs • Package AN5790N...NF-12S(12-Pin SIL plastic package) AN5792...F-12S (12-Pin SIL plastic package with fin) 0.1 0.45 –+ 0.05 1.7±0.25 1.7±0.25 12-Pin SIL Plastic Package (12-SIP) AN5792 Unit : mm 29.4±0.3 0.5±0.1 1.2±0.25 2.54 28.0±0.3 5 4 3 2 1 1.7±0.25 12 11 10 9 8 7 6 3.5±0.25 1.2±0.25 0.1 0.45 –+ 0.05 7.9±0.3 ø3.3 5.8±0.25 1.7±0.25 12-Pin SIL Plastic Package with Fin (12-SIF (f)) ■ Block Diagram VCC 6 1 2 3 5 Polarity Switch X-ray Protector Pre-Amp. 8 AFC Hor. Osc. PulseWidth Adjustment 7 4 12 11 9 10 GND ICs for TV AN5790N, AN5792 ■ Absolute Maximum Ratings (Ta= 25˚C) Symbol Rating Supply voltage Parameter VCC 13.2 Supply current ICC 50 mA mW V PD 1140 Operating ambient temperature Topr – 20 to +70 ˚C Storage temperature Tstg – 40 to +150 ˚C Power dissipation Temperature Unit ■ Electrical Characteristics (Ta= 25˚C) Parameter Symbol Condition min Total circuit current Itot VCC=11V Polarity switching voltage (1) V2-7 Positive polarity signal input Polarity switching voltage (2) V2-7 Horizonal oscillation start voltage VOSC-S (H) 30 mA 0.4 V Negative polarity signal input 2.5 5.5 fHO=12kHz to 19kHz 7.5 fHO (1) VCC=11V, C= 4400pF 15 fHO (2) VCC=11V, C= 820pF, 5600pF 14 fHO supply voltage dependency ∆fHO/VCC fHO=15.75kHz, fHO | 9.9V– fHC | 12.1V fHO ambient temperature dependency ∆fHO/Ta fHO=15.75kHz, fHO | –20˚C – fHC | 60˚C Oscillation frequency control sensitivity β kHz 60 kHz 40 130 Hz 260 Hz 16 17.6 19.3 Hz/µA 17.8 19.4 µ×β 15.75 700 Output pulse width τ HO (1) VCC=11V, R= 20kΩ, C= 6800pF Output pulse width τ HO (2) VCC=11V, R=20kΩ, C=330pF, 18000pF V V 16.5 ∆IO= ±25µA fDC Unit 0 Horizonal oscillation frequency 45 max 60 Horizonal oscillation frequency DC loop gain typ 2 Hz/µs 21.2 µs 40 µs Output pulse width variation to supply voltage change ∆τ HO/VCC VCC= 9.9V to 12.1V 5 % Output pulse width variation to temeprature change ∆τ HO/Ta VCC=11V, Ta= – 20˚C to + 60˚C 5 % Oscillation output saturation voltage V8-7 VCC=11V, V10-7=1V 2 Oscillation output drive current I8-7 VCC=11V, V10-7=1V 300 X-ray protecting circuit operation start voltage V6-7 VCC=11V 0.5 0.64 ■ Application Circuit 6 + + – – VCC (11V) + – 4.7µF 33kΩ 5 0.033µF 0.015µF 4 3.3kΩ FBK Pulse Input 3 220µF/16V 2 39pF 0.018µF 1 33µF/50V AN5790N/AN5792 Hor. Sync. Signal 7 8 9 10 11 12 Output 20kΩ 27kΩ 2700pF 2700pF (Styrol Cap.) (Mylar Film Cap.) 2.7kΩ 2kΩ V mA 0.75 V ICs for TV AN5790N, AN5792 ■ Pin Descriptions Pin No. 1 Pin name Horizontal synchronous signal input pin Typ. waveform 5V 0V 2 Polarity discrimination switching pin 3 Flyback pulse input pin 4 AFC output pin DC 5 Supply voltage DC 6 X-ray protecting circuit input pin DC GND DC 7 DC Description Pin for inputting a horizontal synchronous signal. Equivalent circuit 4kΩ 5V 2 3 5.9V 4 Result of AFC detection. When a voltage of 0.75V or more is applied, no horizonal output will not be generated. 5V 1 Both polarities of an input signal of Pin1 are made available by connecting this pin to GND or setting it to OPEN Flyback feedback pin. The standard value of amplitude is 1.5Vpp. 4kΩ 6 200Ω 8 8 Horizontal drive output pin 680Ω Current when turned ON should be used at 300mA or less. 2Ω ICs for TV AN5790N, AN5792 ■ Pin Descriptions (cont.) Pin No. Pin name Typ. waveform Description Equivalent circuit 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 9 Pulse width adjusting pin 1kΩ 11 Sawtooth wave generating pin 12 Horizontal oscillation circuit reference voltage Oscillation frequency can be changed by the capacitor to be connected to this pin. DC Oscillation frequency is changed by the resistor between this pin and GND. 11 12 3.3V