Power Electronics / Power Management

Step-down converter

14 October 2015 Power Electronics / Power Management

Torex Semiconductor has developed the XC9252 series of 105°C step-down DC-DC controllers with 30 V operation and a low supply current. This is a high breakdown voltage product with an input voltage of 30 V, input rating of 36 V, and a peak voltage of 46 V for 400 ms.

The input voltage range is wide – from 3,0 V to 30 V – and the P-channel MOS driver transistor is controlled to provide a stable output voltage even when the dropout voltage is low. The output voltage can be set to any value from 1,5 V upwards using external resistors.

PWM/PFM auto switching control realises high efficiency over the entire load range, and a low supply current is achieved to increase efficiency at light loads, making this controller ideal for a variety of applications. The switching frequency can be set to any value from 280 kHz to 550 kHz by connecting an external resistor, while unnecessary noise can be suppressed by synchronising to an external clock within a range of ±25% of the internal clock.

Any value can be set for the soft-start time by adding an external capacitor, and an under-voltage lockout function that forcibly turns off the driver transistor when the input voltage is 2,5 V or less is incorporated. As protective circuits, over-current protection, short-circuit protection and thermal shutdown are implemented to enable safe use.

For more information contact Arnold Perumal, Avnet South Africa, +27 (0)11 319 8600, [email protected], www.avnet.co.za

Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

650 W fast recovery diodes
RS Components (SA) Power Electronics / Power Management
Rohm has released its 4th-generation 650 V fast recovery diodes (FRDs), balancing forward voltage and reverse-recovery time for high-power industrial and consumer equipment including air conditioners and electric vehicle charging stations.

Wireless charging IC solution
TRX Electronics Power Electronics / Power Management
The WLC1115 transmitter controller IC is the first highly integrated product of the new WLC family of controllers from Infineon for applications in inductive wireless charging.

Real-time monitoring of solar power stations
Otto Wireless Solutions Power Electronics / Power Management
WLink’s 3G/4G routers remotely monitor and manage power stations in real-time and perform fault diagnosis, power prediction and a daily maintenance routine.

1,5 A LDO linear regulator from TI
Altron Arrow Power Electronics / Power Management
The TPS7A74 from Texas Instruments is a 1,5 A low-dropout linear regulator with programmable soft-start for a wide variety of applications.

eFuse with transient overcurrent blanking timer
RS Components (SA) Power Electronics / Power Management
The TPS25981xx family of eFuses from Texas Instruments is a robust defence against overloads, short circuits, voltage surges and excessive inrush current.

New low-cost 60 W PSU
Vepac Electronics Power Electronics / Power Management
The new VCB60 series of 60 W PSUs from XP Power addresses the need for high-quality easy-to-use power solutions at attractive price points.

New series of high-power pure sine wave inverters
Current Automation Power Electronics / Power Management
The NTS/NTU-2200/3200 series pure sine wave inverters by Meanwell now have the ability to use lithium batteries as well as lead acid as the DC power source.

Fully programmable motor controllers
Altron Arrow Power Electronics / Power Management
The MOTIX IMD70xA programmable motor controllers from Infineon are now available in one package to power the next generation of battery-powered applications.

New power converter family from Traco
Conical Technologies Power Electronics / Power Management
Traco Power has announced the release of their new TMR 12WI converter family featuring isolated 12W DC/DC converter modules with regulated outputs.

Bourns releases new series of power inductors
Electrocomp Power Electronics / Power Management
Constructed with a magnetic-silica coating to the perimeter of the inductor winding to provide effective shielding, these inductors release lower magnetic field radiation compared to non-shielded inductors.