Temperature sensing in high-precision applications

5 June 2002 Power Electronics / Power Management

When it comes to precision applications, the demands of a temperature sensor are tested to the maximum: superior accuracy, low power consumption, and a tiny package are just a few of the challenges that it - or they - must answer. Typical high-accuracy thermal management applications use thermistors. However, the thermistor is nonlinear and therefore requires several additional support components to digitise, linearise, and format.

Often, these applications integrate as many as four temperature sensing elements to accomplish this: base stations - to sense the overloads in the power amplifier; portables - to monitor the battery charge rate; instrumentation - in LCD panel temperature measurement; communications - in the frequency synthesizer system to compensate for temperature effects.

The newest member in Analog Devices' temperature sensor family that can address all these requirements in one chip is its ADT7301. This device is an accurate SOT temperature sensor, with a specification of ±0,5°C from 0°C to 70°C. Fully specified for 2,7 V to 5,5 V voltage supplies, it operates over a very broad temperature range, -55°C up to +150°C.

Along with this, the ADT7301offers high accuracy, very low power consumption, and comes in small 6-lead SOT and chip scale packages.

Applications are in: medical instrumentation; portable communication; industrial control; disk drives; and automotive.

Further reading:

Analysis of switch-mode power supply: inductor violations
Altron Arrow Editor's Choice Power Electronics / Power Management
Common switch-mode power supply (SMPS) design errors are discussed, and their appropriate rectification is specified, with details on complications that arise with the power stage design of DC-DC switching regulators.

Read more...

---

Compact PCB-mount SMPS
RS South Africa Power Electronics / Power Management
Traco Power’s 5W PCB-mount switch mode power supply (SMPS) offers high efficiency, and is well suited for a variety of applications in the automation, electronics, electrical and mechanical industries.

Read more...

---

AC-DC brick PSU
Conical Technologies Power Electronics / Power Management
These PSUs have a typical efficiency of up to 92%, and a power factor value of up to 0,99. They are available in 12, 24, 28, 48 and 54 V output versions.

Read more...

---

5 kW switching PSU range
Conical Technologies Power Electronics / Power Management
Mornsun has released a new switching power supply range, the LMF5000-25Bxx, which has a 5000 W capacity, and features universal AC input configurations.

Read more...

---

Reliable charging range
Current Automation Power Electronics / Power Management
Whether you’re powering essential electronics, keeping emergency equipment operational, or maintaining the performance of critical machinery, the need for dependable charging solutions cannot be overstated.

Read more...

---

Microchip expands its mSiC solutions
EBV Electrolink Power Electronics / Power Management
The highly integrated 3,3 kV XIFM plug-and-play digital gate driver is designed to work out-of-the-box with high-voltage SiC-based power modules to simplify and speed system integration.

Read more...

---

Dual-port USB-C power delivery solution
Altron Arrow Power Electronics / Power Management
Infineon’s CYPD7272-68LQXQ is the tray packing option of the company’s dual-port USB-C power delivery solution and features an integrated dual-port USB-C PD + DC-DC controller.

Read more...

---

Parallel redundancy power module
Conical Technologies Power Electronics / Power Management
The LIR40-40 is a wide input range DC-DC module, with a constant output of 48 V at a nominal output current of up to 40 A.

Read more...

---

Motor protection relay front-end
NewElec Pretoria Power Electronics / Power Management
Newelec’s Motor Protection Relay front-end software isn’t just another tool, it’s a game changer that puts control firmly in your hands.

Read more...

---

High-power three-phase supplies
Current Automation Power Electronics / Power Management
The units from Meanwell can either be supplied with a three-phase three-wire delta input of 196 to 305 V AC, or they can use a three-phase four-wire star connection of 340 to 530 V AC.

Read more...

---