TDA1670A

      The TDA1670A is a monolithic intergrated circuit in 15-lead Multiwatt package.It is a full performance and very efficient vertical deflection circuit intended for direct drive of the yoke of 110 colour TV picture tubes.It offers a wide range of applications also in portable CTVs,BW TVs,monitors and displays.Here is some information about the TDA1670A functions.The first is the synchronization circuit.The second one is that it can be used as precision oscillator and ramp generator.The third one is the power output amplifier with high current capability.Then is the flyback generator function.Next is the voltage regulator function.The sixth one is the precision blanking pulse generator.The seventh one is the thermal shut down protection.The last one is the CRT screen protection circuit which blanks the beam current in the event of loss of vertical deflection current.
      What comes next is about the absolute maximum ratings of TDA1670A.The V_S (supply voltage at Pin 14) is 35 V.The V₁,V₂ (flyback peak voltage) is 60 V.The V₅ (sync. input voltage) is 20 V.The V₁,V₁₂ (power amplifier input voltage) is V_S-10 V.The V₁₃ (voltage at Pin 13) is V_S.The I_O (output current (non repetitive) at t=2 msec) is 3 A.The I_O (output peak current at f=50 Hz t>10sec) is 2 A.The I_O (output peak current at f=50 Hz t10sec) is 3.5 A.The P_tot (maximum power dissipation at T_case60) is 30W.The T_stg,T_j (storage and junction temperature) is from -40 to 150.Then is about the thermal data.The maximum R_{th j-case} (Thermal resistance junction-case) is 3/W.The maximum R_{th j-amb} (Thermal resistance junction-ambient) is 40/W.