TA8028S

TA8028S TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC TA8028S DUTY CONTROLLER The TA8028S is an IC designed to control automotive illumination systems. It produces an accurate output with small temperature drift. Either Sink or Source type output can be selected. FEATURES l Output ON / OFF duty variable l Large output current Sink type : IOUT = 300mA Source type : IOUT = 100mA l Regulated voltage circuit incorporated : 6.7V shunt regulator l Operating temperature range : Ta = −40 to 85°C l Small SIP-7 pin BLOCK DIAGRAM AND PIN LAYOUT Weight: 0.7 g (typ.) 1 2002-03-12 TA8028S PIN DESCRIPTION PIN No. 1 2 3 4 5 6 7 SYMBOL CK VCC REF GND OUT1 BIAS OUT2 DESCRIPTION Pin for determining the output frequency. A resistor is connected between VCC and CK ; a capacitor is connected between CK and GND. Power supply pin. This pin connects to the 6.7V regulated voltage circuit. Duty control pin. The voltage at this pin determines the output duty. Grounded Sink-type output pin which supplies the open-collector output of an NPN transistor. Connects to the collector of an NPN transistor preceding the NPN transistor which leads to the OUT1 pin. A resistor is connected between this pin and the power supply. When this pin is connected to OUT1, it supplies a Darlington transistor output. Source-type output pin which supplies the open-emitter output of an NPN transistor. TIMING CHART (1) SINK TYPE (2) SOURCE TYPE 2 2002-03-12 MAXIMUM RATINGS (Ta = 25°C) CHARA...