Synchronous MOSFET controller

8 February 2012 Power Electronics / Power Management

Diodes Incorporated has extended its family of dedicated synchronous MOSFET controllers with the 25 V rated ZXGD3104N8 designed for notebook and laptop power supply designs of 90 W and above.

The mandatory drive to increase power supply efficiency means that the secondary side Schottky diode begins to dominate the losses. Replacing this lossy diode with a low Rds(on) MOSFET and controlling with the ZXGD3104N8 increases overall PSU efficiency through a reduction in rectifier losses.

Intended for operating in flyback converters, the ZXGD3104N8 is designed to control and switch the MOSFET at optimum performance while minimising switching and on-state losses. As a result, the controller helps power supplies more easily attain the 87% Energy Star V2.0 rating.

With its wide operating voltage range of 5 to 25 V, this SO8 packaged MOSFET controller is able to be directly powered from the adapters’ 19 V supply rail, while ensuring sufficient headroom in the event of transient over-voltage conditions. Combined with the device’s direct 180 V MOSFET drain sense capability obviating the need for an external clamp circuit, this means designers can reduce component count and save space.

The ZXGD3104N8’s proportional gate drive operation guards against premature MOSFET turn-off as the drain current decays to zero, thereby maximising circuit efficiency by ensuring body diode conduction losses are minimised. This, combined with the short turn-off propagation delay of typically 15 ns, helps to maximise power supply circuit efficiency.

Further reading:

Next-gen power meter
Electrocomp Express Power Electronics / Power Management
The VT-PWR-LV is a next-gen Vista Touch power meter from Trumeter for single, split, and three-phase systems.

Read more...

---

Advanced PMIC for high-performance AI applications
ASIC Design Services Power Electronics / Power Management
Microchip Technology has announced the MCP16701, a Power Management Integrated Circuit (PMIC) designed to meet the needs of high-performance MPU and FPGA designers.

Read more...

---

New SiC power MOSFET
Future Electronics Power Electronics / Power Management
STMicroelectronics’ SCT012H90G3AG is a robust, automotive-grade SiC MOSFET, engineered for demanding power electronics, featuring a 900?V drain-source voltage and exceptionally low on-resistance of 12?mO at 60?A.

Read more...

---

Fundamental motor control design challenges and solutions
Power Electronics / Power Management
Mouser Electronics has announced a new eBook in collaboration with Qorvo, featuring industry experts providing key insights into methods, power efficiency and integration solutions available for motor control applications.

Read more...

---

Power management IC for battery products
Power Electronics / Power Management
The nPM1304 PMIC complements Nordic’s nPM1300 PMIC with a highly integrated, ultra-low power solution and precision fuel gauging for small size battery applications.

Read more...

---

Powering Innovation eBook: Changing what’s possible
Power Electronics / Power Management
This exclusive read, entitled ‘Changing what’s Possible,’ delves into how power dense Vicor modules enable many world-changing innovations across various sectors.

Read more...

---

16-channel multicell battery monitor
Altron Arrow Power Electronics / Power Management
The ADBMS6830B is a multicell battery stack monitor that measures up to 16 series-connected battery cells with a lifetime total measurement error of less than 2 mV.

Read more...

---

Reliable redundancy with the Mibbo M3DN Series
Conical Technologies Power Electronics / Power Management
Designed for use with two parallel-connected power supplies, the M3DN Series allows for true redundancy, making it ideal for mission-critical applications.

Read more...

---

Automotive power-over-coax inductor
RS South Africa Power Electronics / Power Management
TDK has launched the ADL8030VA, a high-performance inductor designed specifically for power-over-coaxial applications.

Read more...

---

Rugged PSU for challenging conditions
Conical Technologies Power Electronics / Power Management
Built for rugged reliability, the Mibbo MFC Series delivers stable, efficient power in environments where moisture, dust, and temperature extremes are everyday challenges.

Read more...

---