Single switch forward controller helps simplify power supply designs

20 October 2004 Power Electronics / Power Management

Linear Technology's LT1952 is a current mode PWM controller in a 16-lead SSOP package that is optimised for forward converter topology power supply design. The device requires only one primary side MOSFET and provides synchronous rectifier control for high operating efficiency without need for an external MOSFET driver or timing circuitry, says the company.

The LT1952 is designed to simplify the design of 25 W to 300 W power supplies such as isolated 48 V input to 12 V, 5 V or 3,3 V output in industrial or telecom applications. It has a programmable volt-second clamp that provides a safeguard for transformer reset that prevents saturation and protects the MOSFET. This function also allows the use of a smaller transformer, MOSFET and rectifiers, resulting in minimum space for a given output power.

The device includes soft-start function for a controlled exit from shutdown, overcurrent conditions and undervoltage lockout. To improve efficiency while starting conversion from high input voltages, the LT1952 features a micropower 460 μA start-up current and is operational from -40 to 85°C. Because of its programmable slope compensation, leading edge blanking and a true error op-amp, a wide range of inductors and MOSFETs can be used without jeopardising circuit stability.

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...

---