330 W isolated DC-DC converter reference design for 48 V bricks

3 May 2006 Power Electronics / Power Management

International Rectifier's new reference design, featuring the IR2086S DC Bus Converter control IC and DirectFET power Mosfet chipset, the IRDC2086-330W, can simplify the development of 48 V input brick or embedded power supplies for networking, communications and high-end server applications.

The IRDC2086-330W is a 48 V to 9,6 V (35 A) unregulated DC bus converter that is 97% efficient, in a size 30% smaller than industry-standard quarter brick regulators. In addition, it reduces the number of powertrain components from three ICs and 14 FETs to a single IC and eight FETs.

The reference design chipset consists of the IR2086S primary-side, full-bridge control IC plus eight power train Mosfets: four IRF6646 80 V DirectFET primary-side Mosfets and four IRF6635 30 V DirectFET secondary-side synchronous Mosfets. Small Mosfets are used for bias switching (one IRF7830 80 V Mosfet in an SO-8) and the secondary clamp (two IRF6621 30 V Small Can DirectFET Mosfets).

The IR2086S full-bridge controller operates at high frequency (programmable to 500 kHz), and features an integrated soft-start capacitor that gradually increases duty cycle to 50% over 2000 cycles to limit in-rush current during start-up and maintains equal pulse widths for the high- and low-side Mosfets in the full bridge throughout the start-up sequence.

The reference design includes the IRDC2086-330W fully-assembled printed circuit board, and a CD-ROM containing a User's Guide, data sheets, PCB files and application notes. In addition, IR's on-line design tool, myPOWER, can be used to customise Mosfet selection to suit one's application.

Further reading:

RF arrestor provides robust protection
RFiber Solutions Power Electronics / Power Management
NexTek’s range of coaxial RF surge and lightning arrestors are designed and built to provide robust protection for any radio or coaxial RF transmission application.

Read more...

---

Wide-Bandgap Developer Forum 2025
Power Electronics / Power Management
To give designers the ultimate in design flexibility, the entire range of WBG power semiconductors will be provided including discretes, modules, and highly integrated solutions ranging from 40 V to 700 V for GaN and 400 V to 3,3 kV for SiC.

Read more...

---

Latest MotorXpert software drives FOC motors without shunts or sensors
EBV Electrolink Power Electronics / Power Management
Power Integrations has announced MotorXpert v3.0, a software suite for configuration, control and sensing of BLDC inverters that utilise the company’s BridgeSwitch motor-driver ICs.

Read more...

---

New 5 kW and 8 kW hybrid inverters
Current Automation Power Electronics / Power Management
Switching time from on-grid to off-grid mode is a rapid 5 ms allowing for protection of sensitive electronic equipment.

Read more...

---

Power relays for energy management applications
Future Electronics Power Electronics / Power Management
The Panasonic Industry HE-R Series is an energy management relay designed for single-phase or 3-phase AC charging units, combining high capacity, high switching, and low operating power into a small size power relay.

Read more...

---

Programmable switching DC PSU series
Vepac Electronics Power Electronics / Power Management
The SPS6000X Series from Siglent is a programmable switching DC power supply with a wide range of single output and constant power features.

Read more...

---

Tiny MLCCs at 1250 V
RS South Africa Power Electronics / Power Management
TDK Corporation has expanded its CGA series for automotive and C series for commercial multilayer ceramic capacitors to 10 nF at 1250 V in 3225 size.

Read more...

---

PMIC extends life of BLE products
Avnet Silica Power Electronics / Power Management
Nordic Semiconductor’s nPM2100 PMIC incorporates an ultra-efficient boost regulator and a wide range of energy-saving features to significantly extend operating time in non-rechargeable battery applications.

Read more...

---

PCB-mount 40 W converter
Vepac Electronics Power Electronics / Power Management
With an ultra-compact 2,5 x 2,5 mm package and a high-power density of 93 W/in³, these converters are optimised for efficiency and space-saving designs.

Read more...

---

Upgraded multiphase power inductor
iCorp Technologies Power Electronics / Power Management
The increased demand for computing power in data centres has resulted in the development of multi-phase ultra-low profile, ultra-high current copper magnetic co-fired power inductors.

Read more...

---