CPC1596GSTR

INTEGRATED CIRCUITS DIVISION Driver Characteristics Parameter Rating Units Input Current 2.5 mA Switching Speed (IF=5mA, MOSFET Input Capacitance=4nF) td(on) 3 td(off1) (VGB=2V) 365 s td(off2) (VGB=1V) 435 Features Requires No Load-side Power Supply Drives External Power MOSFET 570V Load Voltage Only 2.5mA Input LED Current to Drive External MOSFET 3750Vrms Input-to-Output Isolation High Reliability Small 8-pin DIP and Surface Mount Packages Surface Mount Tape and Reel Version Available Applications Optically Isolated AC or DC Relays for: Industrial Controls Instrumentation Medical Equipment Isolation Electronic Switching I/O Subsystems Appliances Figure 1. CPC1596 Application Diagram 1 NC 4 NC CPC1596 2 LED+ 3 LED- CPC1596 570V, Optically Isolated Load-Biased Gate Driver Description The CPC1596 is an optically isolated, load-biased Gate Driver that requires no additional power supply to bias the external MOSFET gates; in the off-state it regulates the voltage drawn from the load (up to 570V) down to 12.2V for internal use. It is specifically designed for low duty cycle switching applications such as an optically isolated DC relay using a single MOSFET or an AC relay with two MOSFETs. The CPC1596 accomplishes very fast MOSFET turn-on by supplying charge stored in an external capacitor to the MOSFET gate when input control current is applied to the device’s LED. After the MOSFET is turned on, photocurrent from the internal ...