EMI filter for DC-DC converters

2 May 2012 Circuit & System Protection

Vicor announced the introduction of the Picor QuietPower QPI-21 active EMI filter for DC-DC converters. Supporting 48 V DC-DC converter designs up to 14 A for data communications and telecommunication applications, the device provides >99,5% efficiency while achieving high filtering performance.

The QPI-21 is packaged in a high-density, 25 x 25 mm land grid array (LGA) surface mount package. Its 4,5 mm height maximises airflow for space constrained designs, making it an ideal fit for advanced blade-architecture applications. These density advantages are complemented by new performance enhancements enabling higher-frequency attenuation across various system configurations than earlier-generation QuietPower QPI-series filters.

The device attenuates conducted common mode (CM) and differential mode (DM) noise over the CISPR22 frequency range of 150 kHz to 30 MHz (45 dB for CM and 80 dB for DM attenuation at 250 kHz). It is designed for use in 48 V bus (36–76 V) systems, with 100 V d.c./100 ms surge capability, and operates over a wide temperature range of –40°C to +125°C and up to an ambient temperature of

65°C without derating.

The QPI-21 supports the PICMG 3.0 specification for filtering system boards to the EN55022 Class B limits and is also tolerant to all DC-DC converter grounding schemes. It addresses multiple voltage rail/bus needs for applications in aerospace and industrial, in addition to datacom and telecom. The device is a universal filter for use with DC-DC converters from any manufacturer.

Further reading:

Clearing the Static: The importance of ESD audits
Actum Circuit & System Protection
An ESD audit is the first step in establishing an effective static control programme in the workplace, and will help identify vulnerable areas and potentially hazardous static zones that require improvement.

Read more...

---

EMI shielding materials application guide
Circuit & System Protection
TE Connectivity’s shielding solutions include electrically conductive elastomers, gaskets, knitted wire mesh, oriented wire, EMI shielding ventilation panels, shielded window, cable shielding and shielding components.

Read more...

---

Clearing the Static: ESD containers and packaging
Actum Circuit & System Protection
         Vacuum forming ESD Electronic components can be damaged by electrostatic discharges. To protect against such damage, electronic assembly parts are often transported or stored in vacuum formed component ...

Read more...

---

Electrostatic discharge chairs
Actum Circuit & System Protection
An ESD chair forms an integral part of grounding within the electrostatic discharge protected area to prevent potential damage to products.

Read more...

---

Conductive ESD footwear
Actum Circuit & System Protection
Conductive ESD footwear is used in conjunction with other grounding devices, such as a wrist strap, cord, and ESD surface mats, to provide a continuous path to ground.

Read more...

---

Clearing the Static: The importance of cleaning in ESD control
Actum Circuit & System Protection
To prevent Electrostatic Discharge (ESD) damage to sensitive electronic assemblies and components, all production, handling, packaging, and storage must take place in an ESD-protected environment.

Read more...

---

Clearing the Static: Staying grounded
Actum Circuit & System Protection
To maintain reliable electrostatic discharge control, regular testing and accurate measurement are essential, with grounding products and ESD testing equipment being vital.

Read more...

---

Smarter protection without disruption
NewElec Pretoria Circuit & System Protection
Designed for operations still running without integrated automation, NewElec’s retrofit-friendly systems let you upgrade performance and safety without overhauling your entire network.

Read more...

---

Circuit breaker for reliable, compliant protection
RS South Africa Circuit & System Protection
Legrand’s low-voltage power distribution portfolio encompasses the DX3 range of miniature circuit breakers, designed to deliver dependable protection in residential, commercial and industrial installations.

Read more...

---

Reducing noise on power supply lines
Future Electronics Circuit & System Protection
Murata has introduced the EMIFIL ESD Series Noise Filters, a breakthrough solution engineered for superior noise suppression and enhanced electrostatic discharge (ESD) protection.

Read more...

---