Current-limited power switches

26 June 2013 Power Electronics / Power Management

Offering high current handling in a 2 x 2 mm package, the latest family of current-limited power switches from Diodes Incorporated enables power density to be increased in the protection of multiple USB3.0 ports used in applications such as set-top boxes, LED TVs and notebook computers.

The six new single-channel devices have an on-resistance of only 70 mΩ, cover maximum continuous output currents up to 2,5 A and are being made available in the miniature footprint U-DFN2020-6 package.

For any applications subject to heavy capacitive loads and a possibility of short circuit, the switches provide a robust port protection solution, comprising reverse-current blocking, over-current, over-temperature, under-voltage lockout and short circuit protection. They also integrate an output discharge function to ensure controlled discharging of the output capacitor. In addition, their fast short circuit response time of 2 μs prevents any unnecessary system shutdown or restart.

With an input voltage range of 2,7 V to 5,5 V, all devices are suited to 3,3 V and 5 V rail systems. Supporting a maximum continuous output current of 2,5 A, the AP2501 and AP2511 are, respectively, active-low and active-high enabled and are footprint-compatible with the AP2301 and AP2311 devices handling a 2 A continuous output current.

The AP2401 and AP2411 are also 2 A rated power switches but provide in addition an output latch-off function that responds to an over-current excursion, enabling further optimisation of fault behaviour management. All six power switches also feature an open-drain over-current fault flag with a 7 ms deglitch time to prevent false reporting.

As well as the U-DFN2020-6 package, the devices are also offered in SO8, MSOP-8/EP and U DFN3030-8 package options. Ambient operating temperature range is -40°C to +85°C.

Further reading:

Rugged railway-grade DC-DC power modules
iCorp Technologies Power Electronics / Power Management
iCorp Technologies has introduced the AIPUPOWER ZCD100 and ZCD150 Series, a family of rugged DC-DC converters designed to meet the demanding electrical and environmental requirements of railway and transportation systems.

Read more...

---

Four-quadrant regenerative grid simulator
Conical Technologies Power Electronics / Power Management
The IT7900EP series high-performance regenerative grid simulator from ITECH is a full four-quadrant AC grid simulator capable of both sourcing and sinking power.

Read more...

---

90 W PSU with 150% boost capability
Brabek Power Electronics / Power Management
RECOM’s cost effective REFIN2U-S90/CL DIN rail AC/DC boasts a 90 W rating with a boost capability of 150% for 4,5 seconds to allow for surge loads.

Read more...

---

Standalone USB PD controller
Future Electronics Power Electronics / Power Management
The STUSB4531 from STMicroelectronics is a standalone USB Power Delivery sink controller designed to streamline the implementation of USB-C power negotiation in sink devices without requiring a full software stack on a host microcontroller.

Read more...

---

Power module enhances AI data centre power density
Altron Arrow Power Electronics / Power Management
Microchip’s MCPF1525 power module with PMBus delivers 25 A DC-DC power and is stackable up to 200 A.

Read more...

---

MIL-Spec DC-DC power converters
Vepac Electronics Power Electronics / Power Management
PowerGood has introduced a range of 15 W to 600 W military DC-DC power converters engineered for mission critical defence applications.

Read more...

---

Compact power MOSFET for high current switching
Future Electronics Power Electronics / Power Management
onsemi’s NTMFSC2D6N08X is a high-performance 80 V N-channel power MOSFET engineered for demanding switching and power conversion applications.

Read more...

---

DC link capacitors for demanding applications
RS South Africa Power Electronics / Power Management
TDK Corporation has announced the B3271xP series of DC link film capacitors, offering high thermal robustness for demanding automotive and industrial power electronics.

Read more...

---

N-channel power MOSFETs
TRX Electronics Power Electronics / Power Management
The TSM2N7002 series from Taiwan Semiconductor are logic-level N-channel power MOSFETs designed with low drain-source on-state resistance, reducing conduction losses and improving efficiency in switching applications.

Read more...

---

Smart power protection, simplified
TRX Electronics Power Electronics / Power Management
onsemi electronic fuses (eFuses) deliver integrated, intelligent protection by combining overcurrent, overvoltage, over-temperature, reverse polarity, and inrush current safeguards in a single compact IC.

Read more...

---