The 196 HVC ENYCAPTM polarised energy-storage capacitors from Vishay Intertechnology provide a compact source of stored energy with excellent charge and discharge performance, for use in energy-harvesting and power line back-up applications.
Featuring high energy density of between 9Ws/g and 13Ws/g, the 196 HVC ENYCAP devices are available in a wide variety of layouts, voltage ratings and capacitance values between 4F and 90F.
The capacitors are provided as a single cell with a rated voltage of 1.4V, or in versions with two, three, four, five or six cells and a voltage of 2.8V, 4.2V, 5.6V, 7.0V or 8.4V.
Designers also benefit from a choice of package styles:
• a radial stacked through-hole package
• a surface-mount flat package
• a lay-flat configuration with pins, tabs and connectors
Unlike common multi-cell lithium-ion batteries, 196 HVC ENYCAP capacitors do not require cell balancing. Recommended charge currents and maximum discharge currents are specified so as to ensure the optimum lifetime in any application.
In some applications, such as solar-energy generators and emergency signalling in medical devices, the energy-storage capacitors must be maintained in a constantly high state of charge, which calls for a highly reliable charging circuit. A new application note from Vishay, ‘Power Management Solution: Constant Voltage Pulse Charging of Hybrid Capacitors’, describes why and how to implement a cost-effective constant-voltage charging scheme.
- Up to 2,000h useful life at 85°C
- Non-hazardous electrolyte
- Storage-temperature range: -40°C to 85°C
- Embedded computers
- Utility meters
- Point-of-sale terminals
- Data-storage systems
- Professional remote controls
- Real-time clocks
- Emergency lighting
- Access-control systems
- Surveillance cameras
- Vending machines
- Network equipment