STMicroelectronics offers direct upgrade for bypass diode to prevent hotspot effects

Product Briefing Outline: STMicroelectronics has introduced the SPV1001, which replaces the simple bypass diode with an intelligent device that enhances efficiency and offers the same package outline. The new device can deliver a fast Return-On-Investment, in terms of releasing additional energy for solar panel applications.

Problem: High-efficiency solar cells that produce increased output current demand improvements in the supporting power electronics. Compared to the use of diodes, the integrated power switch provides negligible leakage current when the PV module is producing energy.

Solution: ST’s new SPV1001 contains a low-loss power switch and a precision controller. Directly replacing bypass diodes, which are used to prevent hotspot effects, the SPV1001 protects the energy normally lost in each diode. It has low conduction losses when operating in bypass mode as well as its low leakage current minimizes losses in bypass stand-by mode. It has a low operating temperature, which can help optimize junction box design. There is also high robustness to surge and lightning currents.

Applications: Integration of power and control functions for high-efficiency solar modules.

Platform: In addition to package options enabling one-for-one replacement of bypass diodes in the solar panel’s junction box, the SPV1001 is available in an MLPD package that can be laminated directly into the panel, due to the device’s ultra-low-profile and minimal power losses. This will simplify electronic design and assembly while also boosting system reliability.

Availability: The SPV1001 is in production now in the industry-standard TO-220 and ultra low-profile MLPD packages. Projected pricing is approximately US$3.00 for a minimum order of 1000 units, depending on the package version. Alternative pricing options are available for larger quantities.