U209B3

TELEFUNKEN Semiconductors U209B3/ U209B3–FP Phase Control Circuit – Tacho Applications Description: The integrated circuit U209B3, is designed as a phase control circuit in bipolar technology. It has also protection circuit for the supply. Due to integration of many functions, it leads to significant cost and space saving as well as increased reliability. At the same time, it gives the designer free hand to select varieties of regulators to choose from and switching characteristics according to its choice. Features D Internal frequency to voltage converter D Externally controlled integrated amplifier D Automatic soft start with minimised ”dead time” D Voltage and current synchronisation D Retriggering D Triggering pulse typ. 155 mA D Internal supply voltage monitoring D Temperature compensated reference source D Current requirement ≤ 3 mA Package: DIP14, SO16 14(16) Voltage / Current detector 1(1) Automatic retriggering Output pulse 4(4) 5(5) Control amplifier 6(6) 10(10) + 9(9) – Phase control unit ö = f (V12) 3(3) Supply voltage limitation Reference voltage Voltage monitoring 2(2) –VS GND 13(15) Soft start s 11(11) 12(12) Frequency to voltage converter 8(8) 7(7) 95 10691 Figure 1. Block diagram – SO 16 in bracket Rev. A1: 01.09.1995 Preliminary Information 1 (15) BYT51J D1 R1 M 18 k W 2W R3 220 k W 95 10692 Rev. A1: 01.09.1995 L R4 470 k W 1 Automatic retriggering Output pulse 220 W 5 6 + 9 – Supply voltage limitation Reference voltage Voltage monitorin...