TA8020S

TA8020S TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC TA8020S DUAL VOLTAGE SENSOR The TA8020S is an IC designed for lamp failure detection. When a lamp failure occurs, it detects the resulting lamp current change from the voltage across the detection resistor RS. It has a reference voltage characterized by high accuracy and small temperature drift as well as a voltage comparator. It is also designed to compensate for lamp current changes due to supply voltage variations. It consists of two circuits which are supplied with power from separate pins. FEATURES l Two circuits served by separate power supplies Weight: 0. 92 g (typ.) l High-performance input amplifier incorporated l Reference voltage characterized by small temperature drift l Built-in circuit which compensates for lamp voltage characteristic variations l Operating temperature range : from −40 to 85°C l Plastic SIP-9 pin BLOCK DIAGRAM AND PIN LAYOUT 1 2002-02-27 PIN DESCRIPTION TA8020S PIN No. 1, 9 2, 8 3, 7 4, 6 5 SYMBOL VCC2 VCC1 IN OUT GND DESCRIPTION Power supply pin dedicated to the output transistor. Since it is connected to VCC1 outside the IC, influence of output on / off on the detection voltage is low so that accurate detection is assured. Power supply pin for the IC. High accuracy is assured under the condition of VCC = 8 to 16V. Detection pin which leads to a differential input circuit consisting of a PNP transistor. The detected voltage is amplified ten times within the IC....