Date: 23/10/2009

200V optically isolated MOSFET gate driver IC from Clare with self-biasing

Clare has released the CPC1590, a new 200V optically isolated MOSFET gate-driver IC that uses a bootstrap biasing technique to eliminate the load-side power supply. The CPC1590 is designed for low duty-cycle switching frequencies that drive 4nF of gate capacitance and offers isolated solid-state control to replace large modules and multi-component discrete solutions.

The CPC1590 accomplishes fast MOSFET turn-on by supplying stored charge, from 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 input optocoupler keeps it on for as long as sufficient input control current flows, so there is no low-frequency operating limit. When the MOSFET is turned off, the storage capacitor charges from the device's regulated internal voltage in preparation for the next turn-on.

The key features of the CPC1590 optical gate driver IC are,

Drives external power MOSFET
Low-input LED current from 2.5 to 10mA, activates the internal load-side driver circuit
Requires no external power supply
High reliability
Machine insertable, Wave solderable
Tape and reel version available
3750Vrms input-to-output isolation

The suggested applications for the CPC1590 optical gate driver IC include industrial controls, instrumentation, medical equipment isolation, electronic switching, and I/O subsystems.

The CPC1590 allows a specific MOSFET and external components to satisfy design-switching requirements. The CPC1590 used in conjunction with discrete MOSFETs, suitable for programmable control, process control, instrumentation, and power distribution applications.

Package: Small 8-pin surface mount flatpack package
Price: Each $0.66 for OEM quantities of 10K pieces
Availability: In full production with a leadtime of 5 weeks

For more details visit www.clare.com

Editorial Product Rating: Average