TA8021S

TA8021S TOSHIBA BIPOLAR DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC TA8021S TRIPLE VOLTAGE SENSOR The TA8021S is an IC designed for automotive 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 three circuits which are supplied with power from separate pins. FEATURES Weight: 0.92 g (typ.) l Three circuits served by separate power supplies 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 : −40 to 85°C l Plastic SIP-9 pin BLOCK DIAGRAM AND PIN LAYOUT 1 2002-02-27 PIN DESCRIPTION TA8021S PIN No. 1 2, 4, 8 3, 6, 7 9 5 SYMBOL VC1 VCC IN OUT GND DESCRIPTION Power supply pin dedicated to the output transistor in circuit 1. Since it is connected to VCC outside the IC, influence of output on / off on the detection voltage is low so that failure involving four lamps and other failures can be accurately detected. 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 an NPN transistor. ...