Ordering number: EN2781B Monolithic Linear IC LA7852 CRT Display Synchronization Deflection Circuit Overview The LA7852 is a sync-deflection circuit IC dedicated to CRT display use. It can be connected to the LA7832/7833, 7837/ 7838 (for vertical output use) to form a sync-deflection circuit that meets every requirement for CRT display use. So far, ICs for color TV use have been applied to the syncdeflection circuit for CRT display use, and general-purpose ICs such as one-shot multivibrator, inverter and a lot of transistors have been used to form the peripherals such as sync input interface, horizontal phase shifter. The LA7852 contains these peripherals on chip and adopts a stable circuit for horizontal oscillation from 15 kHz to 100 kHz aiming at improving the characteristics required for CRT display use. The LA7852 has independent GND pins for the horizontal block and vertical block, thus facilitating pattern layout for applications where the LA7852 is used at high frequencies. Package Dimensions unit : mm 3059-DIP22S [LA7852] SANYO : DIP22S . The vertical pull-in range is approximately 10 Hz at 60 Hz. . fvThe= horizontal oscillation frequency can be adjusted stably from 15 kHz to 100 kHz. . The horizontal display can be shifted right/left. . The horizontal/vertical sync input can be used intact of the difference in pulse polarity and pulse width. . regardless The AFC feedback sawtooth wave can be obtained by applying a flyback pulse to the IC as a trigger pulse. . simply Any duty of the horizontal pulse can be set. . Good vertical linearity because DC bias at vertical output is subjected to sampling control within retrace time. . stage Excellent interlace and vertical jitter characteristics on the high-definition display because of independent GND pins for the horizontal block and vertical block. Allowable power dissipation, Pd max – mW Features Pd max – Ta Ambient temperature, Ta – °C Built-in Functions [Horizontal Block] [Vertical Block] . AFC . Horizontal OSC . X-ray protector . Horizontal phase shift . AFC sawtooth wave generator . Horizontal pulse duty setting . Vertical OSC . Vertical sawtooth wave generator . Sampling type DC voltage control SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 81096HA(II)/9138YT/8228YT,TS No.2781-1/5 LA7852 Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage V11, V22 Allowable power dissipation Pd max Conditions Ratings Ta % 65° C Unit 14 V 780 mW Operating temperature Topr –20 to +85 °C Storage temperature Tstg –55 to +125 °C Ratings Unit Operating Conditions at Ta = 25°C Parameter Symbol Conditions Recommended supply voltage V11, V22 12 V Operating voltage range V11, V22 9 to 13.5 V Recommended vertical pulse input peak value VPULSE 5 Vp-p Vp-p Operating vertical pulse input peak value range VPULSE 2 to 6 Recommended horizontal pulse input peak value HPULSE 5 Vp-p Operating horizontal pulse input peak value range HPULSE 2 to 6 Vp-p Operating Characteristics at Ta = 25°C, V11, V22 = 12 V Parameter VCC11 current dissipation VCC22 current dissipation Vertical frequency pull-in range Vertical free-running frequency Increased/reduced voltage characteristic of vertical frequency Midpoint control threshold level Vertical OSC start voltage Temperature characteristic of vertical frequency Vertical driver amplification factor Horizontal AFC DC loop gain Horizontal free-running frequency Horizontal OSC start voltage Increased/reduced voltage characteristic of horizontal frequency Horizontal OSC warm-up drift Temperature characteristic of horizontal frequency Horizontal output drive current Increased/reduced voltage characteristic of phase shifter delay time Temperature characteristic of phase shifter delay time Increased/reduced voltage characteristic of phase shifter delay time Temperature characteristic of phase shifter pulse width AFC phase comparison center time Symbol I11 I22 Vp IN fv ∆fv-v Conditions Vertical sync 60 Hz fv center 55 Hz V22 = 12 ± 1 V, 55 Hz at 12 V min 12 5 10.0 50 max 30 12 12.0 60 Unit mA mA Hz Hz –0.1 +0.1 Hz 3.8 4.4 V 4.0 V Fvcst Ta = –10 to +60°C Gv IAFC+ IAFC– fH fH center 15.734 kHz –0.028 ∆fH +0.028 Hz/°C 12 18 dB 0.85 –1.6 1.6 –0.85 mA mA –750 +750 Hz 4.0 V fHcst ∆fHcv typ V11 = 12 ± 1 V, 15.734 kHz at 12 V –50 +50 Hz 5 s to 30 min. after application of power –50 +50 Hz Ta = –10 to +60°C –2.9 +2.9 Hz/°C I13 6.0 12.0 mA V11 = 12 ± 1 V –0.5 +0.5 %/V Ta = –10 to +60°C –0.1 +0.1 %/°C V11 = 12 ± 1 V –1.0 +1.0 %/V –0.13 +0.13 %/°C 9.9 11.5 Ta = –10 to +60°C 15.734 kHz after FBP input µs No.2781-2/5 Horizontal drive pulse width setting Horizontal drive output X-ray protection input Conditions Horizontal power supply Discharge resistor Horizontal OSC time constant Horizontal ground Vertical ground Comparison voltage generating capacitor Symbol AFC output Vertical drive output Vertical sawtooth wave generation FBP trigger input Sawtooth wave generating capacitor Midpoint voltage control input Vertical OSC time constant Sync pulse width time constant NC Vertical trigger input Vertical power supply Parameter Increased/reduced voltage characteristic of AFC phase comparison center time Temperature characteristic of AFC phase comparison center time Comparison waveform generating input operation voltage Pin 14 voltage at hold-down operation start Phase adjust time constant Horizontal trigger input LA7852 min typ max Unit V11 = 12 ± 1 V –1.5 +1.5 %/V Ta = –10 to +60°C –0.2 +0.2 %/°C V5 0.6 0.9 V V14 0.5 0.8 V Equivalent Circuit Block Diagram No.2781-3/5 LA7852 Sample Application Circuit 14’’ Color Monitor / fv = 60 Hz, fH = 15.734 kHz (Note) Co is connected when oscillation occurs in vertical output in Sample Application Circuit. ( ): Negative pulse mode VR2 is fixed after adjustment. (Note) For the LA7853, the vertical pull-in range is 20 Hz at vertical sync 60 Hz. Unit (resistance: Ω, capacitance: F) No.2781-4/5 LA7852 Sample Application Circuit 14’’ Color Monitor / fv = 60 Hz, fH = 15.734 kHz ( ): Negative pulse mode VR2 is fixed after adjustment A05903 LA7850 Family Type Number LA7850 LA7851 LA7852 LA7853 Package DIP-20S (Slim Type) DIP-20S (Slim Type) DIP-22S (Shrink Type) DIP-22S (Shrink Type) Vertical pull-in range (fv = 60 Hz) 10 Hz 20 Hz 10 Hz 20 Hz Ground pin Horizontal/vertical common horizontal/vertical common Horizontal/vertical separated Horizontal/vertical separated Differences in characteristics No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: 2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of August, 1996. Specifications and information herein are subject to change without notice. No.2781-5/5