|
|
Automotive switching regulator
26 June 2019, Power Electronics / Power Management
The STMicroelectronics A7987 automotive switching regulator has a wide input voltage range that allows use in trucks and buses, and an adjustable output voltage that ensures flexibility and stable performance to power the numerous voltage rails in automotive applications such as body infotainment and telematics.
With maximum input voltage of 61 V, the A7987 can operate from a 24 V battery in a conventional or hybrid/electric vehicle and maintain a regulated output despite disturbances such as load-dump. The output is adjustable from 0,8 V up to the input voltage, with low dropout, and can provide up to 3 A for a wide variety of loads from logic to lighting.
The current limit and switching frequency up to 1,5 MHz are set with external pull-down resistors, letting designers create compact power modules by optimising the output inductor size. Pulse-by-pulse current sensing with digital frequency foldback in short-circuit minimises stress on power components to enhance reliability. Thermal protection is built-in, with shutdown and auto-recovery to minimise reliance on external intervention.
The A7987 embeds a low-resistance N-channel power MOSFET. At light load, pulse skipping maintains output regulation and a bias-voltage input with integrated switchover allows powering analog circuitry from an external source for optimum efficiency.
A synchronisation pin allows up to five regulators to coexist by switching out of phase to avoid noise effects and reduce the RMS current flowing in the input capacitor. An enable pin and a power-good indicator with adjustable delay permit power-up sequencing. There is also an adjustable soft-start function to limit inrush current.
AEC-Q100 certified, the A7987 switching regulator is in production now, in a 5 x 6,4 mm HTSSOP16 exposed-pad package. ST has also released the STEVAL-ISA207V1 evaluation board, to accelerate new projects leveraging the A7987.
For more information contact EBV Electrolink, +27 21 402 1940, capetown@ebv.com, www.ebv.com |
|
|
|
| Share: |
 |
Via email client |
 |
 |
 |
 |
print |
|
|
|
|
|
Further reading:
- Better thermal management enabled by advances in semiconductor packaging
26 June 2019, TRX Electronics, Power Electronics / Power Management
Beyond the realm of traditional thermal management solutions, the latest IC packaging technologies are making a significant contribution to satisfying the exacting thermal demands of modern electronic designs.
- Solar-powered bakery developed at UJ
26 June 2019, Power Electronics / Power Management
When used as a tool for community development, the Solar Bread Box becomes a self-sustaining, economy stimulating, job creating and skills development platform.
- Prolonging the life of UPS batteries
26 June 2019, Forbatt SA, Power Electronics / Power Management
The battery is one of the most important parts of an uninterrupted power supply (UPS) system, and is directly related to the reliability of the entire UPS system. Even the most advanced UPS system is ...
- Mixed-signal MCUs for digital power
26 June 2019, EBV Electrolink, DSP, Micros & Memory
Targeted at advanced digital power applications and consumer and industrial appliances, the new STM32G4 microcontrollers (MCUs) introduce two new hardware mathematical accelerators to boost processing ...
- Passive filter design for an ultra-low noise buck regulator
26 June 2019, NuVision Electronics, Power Electronics / Power Management
Switched-mode power supplies (SMPS) have the advantage of high efficiency compared to traditional low-dropout (LDO) regulators. Due to its switching nature, an SMPS emits noise at its switching frequency ...
- How to design AC-DC power supplies for long life
26 June 2019, Accutronics, Power Electronics / Power Management
There are many things that impact the life of a power supply, overstressed components being the main one. All components have a life that is affected by temperature; some components are more strongly ...
- Designing certified power solutions for LED lighting
26 June 2019, Avnet South Africa, Power Electronics / Power Management
LED lighting has become the product of choice in all types of environments, from domestic to industrial through to specialist areas such as stage lighting. The combination of efficiency in terms of lumens ...
- Three-phase 5 kW power supply
26 June 2019, Vepac Electronics, Power Electronics / Power Management
XP Power’s HPT5K0 series is a range of high power density, high efficiency, resonant zero-voltage switching (ZVS) 5 kW AC-DC power supplies with both ITE/industrial and medical agency approvals that feature ...
- DC-DC converters for 3 to 20 Watts
26 June 2019, Conical Technologies, Power Electronics / Power Management
The new TRI line of DC-DC converters from Traco Power comprises a set of high-isolation, regulated parts which come in a compact DIP-24 package for the 3-10 W units or 5,08 x 2,54 cm for the 15-20 W packages. ...
- Low-profile U-channel PSU
26 June 2019, Vepac Electronics, Power Electronics / Power Management
XP Power has launched a new range of 180 Watt U-channel AC-DC power supplies (PSU) that are intended for space-constrained medical (BF), industrial and IT applications. The low-profile devices are just ...
- DC-DC power module reference design
26 June 2019, Würth Elektronik eiSos, Power Electronics / Power Management
MagI³C power modules from Würth Elektronik are DC-DC converters with integrated controller IC, inductors and capacitors. With the new MagI³C power supply reference design, the manufacturer aims to demonstrate ...
- High-side switch for 12 V systems
29 May 2019, Altron Arrow, Power Electronics / Power Management
The Power PROFET BTS50010-1TAE from Infineon Technologies is a high-side switch designed to drive currents up to 40 A d.c. in 12 V systems. With an on-resistance down to 1,0 m, the device is packaged ...
|
|
