Military-grade SMPS stacked capacitors

9 July 2008 Passive Components

Targeting the defence and aerospace markets, Kemet has introduced military-grade ceramic stacked capacitors for use in high-frequency power supplies. The products are commonly referred to as Switch Mode Power Supply Stacked Capacitors, or SMPS Stacked Capacitors. The product line is qualified to Military Performance Specification MIL-PRF-49470 and DSCC Drawing 87106. The capacitors are intended for high-reliability SMPS and pulse energy applications. Their low equivalent series resistance (ESR) and equivalent series inductance (ESL) make them ideally suited for input and output filtering of power supply applications as well as snubber applications.

These capacitors are now available in case codes 3, 4, and 5, X7R dielectric, voltage ratings from 50 V d.c. up to 500 V d.c., and capacitance values up to 47 μF. The chip stack is horizontal and the leadframe attachment is a high-temperature solder. They are also available in unencapsulated (unpotted bare chips) or encapsulated (potted assembly) styles. The encapsulated styles are primarily used for applications where increased mechanical and environmental protection is required, such as in avionics systems.

With an operating temperature range between -55°C and +125°C, and with capacitance shift limited to ±15% over that range, these SMPS stacked capacitors are suited to electrical applications, general purpose applications and high-frequency power supply circuits.

Further reading:

Coupled inductor for high-performance applications
Passive Components
This coil with MnZn core is characterised by its high permeability and extremely low RDC values, which achieves excellent power density and very high efficiency.

Read more...

---

Power inductors
iCorp Technologies Passive Components
he HTF-MP series is more suitable for complex multiphase power supply applications in design, effectively meeting the needs of ultra-thin and high-power devices.

Read more...

---

SMT power inductors
Future Electronics Passive Components
The Würth Elektronik WE-MXGI SMT power inductors are the latest addition to Würth Elektronik’s moulded power inductor series, engineered for high-frequency power applications.

Read more...

---

Large capacitance MLCCs at 100 V
RS South Africa Passive Components
TDK Corporation has expanded its CGA series for automotive multilayer ceramic capacitors to 10 µF at 100 V in 3225 size.

Read more...

---

Film and mica capacitors
Actum Electronics Passive Components
By utilising various polymer dielectrics plastics, Exxelia film and mica capacitors meet most technical requirements and serve all functions from standard filtering to specialised applications.

Read more...

---

Power-over-coax inductors
RS South Africa Passive Components
TDK has expanded the ADL3225VF series of wire-wound inductors for automotive power-over-coax (PoC).

Read more...

---

Thick film power resistors
Electrocomp Passive Components
Vishay has released a new product to the market, its thick film power resistor, which is offered in a clip-mount TO-247 package.

Read more...

---

Compact EMI suppression capacitors
RS South Africa Passive Components
These new components from TDK are 20% smaller than previous models and meet Grade III Test B standards for temperature, humidity, and bias.

Read more...

---

HiRel components from Kyocera AVX
Electrocomp Passive Components
Kyocera AVX Corporation is a leading supplier of advanced components and interconnect solutions, offering a broad selection of passive components and connectors.

Read more...

---

Tiny power inductor for low noise applications
iCorp Technologies Passive Components
With the evolution of Bluetooth, chips, sensors and other technologies, the design of TWS earphones is becoming smaller and thinner, and the performance and size requirements of integrated inductors need to follow suit.

Read more...

---