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The DPA Series ChipSwitch uses exclusive International Rectifier S3X power integrated circuit technology to form a fully functioning solid-state relay. The S3X technology combines MOS and bipolar processes,derived from IR's HEXFET® power MOSFET designs, to eliminate the need for both discrete components and hybrid circuits. The basic DPA Series ChipSwitch consists of two identical power integrated circuits connected in inverse parallel (analogous to back-to-back SCRs) for AC control plus an isolated GaAIAs light emitting diode (LED) for actuation. Voltage controlled models with an internal resistor to limit the control current are also available.
Extreme reliability is achieved by the reduction of component count from approximately 20 discrete components in a conventional SSR to 3 basic components in the ChipSwitch.
The DPA Series ChipSwitch is a single-pole,normally-open SSR capable of switching up to 1.0 ARMS load currents with precise zero-voltage turnon and zero-current turn-off, thus reducing EMI emissions.
These devices are ideally suited for interfacing microprocessors to AC loads, such as small motors,lamps, solenoids, valves and high power motor starters. The economy of the DPA Series ChipSwitch allows the in-house manufacturer to replace assemblies of triacs, triac drivers and associated components with a highly reliable,miniature, standard SSR.
DPAD1 General Description
Calogic's ultra low leakage dual pico amp diodes out performconventional diodes for applications where reverse current(leakage) is critical and must be kept at a minimum. Thedevices have very low capacitance and are also fastswitching. Housed in a compact dual hermetic package and aplastic surface mount SO-8 this product is also available inchip form for hybrid uses.
DPAD1 Maximum Ratings
Forward Gate Current, Each Side ...................... ..... .....50 mA Total Device Dissipation @ TA = 25 Derate 4.0 mW/ oC to 125oC............................. ..... ..400 mW Storage Temperature Range...................... ..... -55 to +125 Lead Temperature (1/16" from case for 10 seconds)......300
DPAD1 Features
High OFF Isolation... .. .. .. .. .. .. .. 1 pA max DPAD1 Excellent Isolation between diodes.... Typical 20 fA Matched Capacitance
DPAD1 Typical Application
p Amp Protection Devices Diode Switching High Impedance Protection