Power Electronics / Power Management


Hot swap controller for 3,3/5 V compact PCI applications

28 February 2001 Power Electronics / Power Management

Linear Technology's LTC1646 is a CompactPCI hot swap controller that allows cards to be safely inserted or removed while the system is running. The LTC1646 directly controls the 3,3 and 5 V supplies for those applications not utilising the +12 V supplies provided by the system. The controller ramps up the supplies in a controlled manner to minimise the potentially damaging in-rush current. It also provides a pre-charge bias for the I/O pins.

The CompactPCI bus is becoming popular in industrial, embedded control and networking server applications due in part to its hot swap control features. The LTC1646 supports the hardware necessary to implement the software features within the CompactPCI specification. While the specification provides 3,3, 5 and +12 V supplies to the backplane, plug-in cards are not required to use them all. The device is specifically designed for those applications that use only the 3,3 and 5 V supplies - or even just one of the 3,3 or 5 V rails - not the +12 V supplies. An internal 15 V charge pump ramps up external N-channel MOSFETs to turn on and off the supplies in a controlled manner. The controlled power up helps prevent supply glitches during power-up and also prevents excessive power dissipation while protecting the board if a short exists. The circuit breakers provide protection if an over-current fault or short-circuit occurs. Foldback current limiting lets the supplies power up in current limit for a specified period of time; this allows the LTC1646 to power boards with widely varying capacitive loads and limit transients without tripping the circuit breakers.

The controller comes in the narrow 16-pin SSOP screened to both the commercial and industrial temperature ranges.

Insight Memec

(021) 674 4124





Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Wide-input DC/DC converters in 1/32nd bricks
Brabek Power Electronics / Power Management
RECOM now offers through-hole, 1/32nd brick-footprint, non-isolated DC/DC converters – the RPMA-4.5 and RPMA-8.0 – with 4,5 A and 8 A output ratings respectively. Each part has a wide 9-53 V input and ...

Read more...
Auto-ranging benchtop and rackmount power supplies
Vepac Electronics Power Electronics / Power Management
The programmable DC power supply family from Elektro-Automatik (EA) ranges in power from 80 W benchtop devices up to 30 kW in a single chassis. High power density units can be easily paralleled for up ...

Read more...
Step-down converter with nano quiescent current
Altron Arrow Power Electronics / Power Management
The ST1PS03 is a nano-quiescent miniaturised synchronous step-down converter which is able to provide up to 400 mA output current with an input voltage ranging from 1,8 V to 5,5 V. This STMicroelectronics ...

Read more...
Convection cooled 150 W and 300 W power supplies
Vepac Electronics Power Electronics / Power Management
Cosel announced the addition of 150 W and 300 W free air convection cooled power supplies, the LHP150F and the LHP300F. Designed for industrial applications requiring high levels of safety, they are certified ...

Read more...
Power supplies for embedded applications from 15 to 320 W
Vepac Electronics Power Electronics / Power Management
XP Power’s LCW series of regulated-output, encased AC-DC power supplies is ideal for embedded industrial electronics, technology and equipment requiring household approvals. The nine new series (LCW15, ...

Read more...
Microchip further expands GaN RF power offering
EBV Electrolink Power Electronics / Power Management
A significant expansion has been made to Microchip Technology’s gallium nitride (GaN) RF power device portfolio with new MMICs and discrete transistors that cover frequencies up to 20 GHz. The devices ...

Read more...
Buck/boost converter with ultra-low IQ and supercapacitor charging
Power Electronics / Power Management
A new bidirectional buck/boost converter with an ultra-low quiescent current (IQ) of 60 nA has been introduced by Texas Instruments. The TPS61094 integrates a buck mode for supercapacitor charging and ...

Read more...
Motor/PFC controller with gate driver and voltage regulator
EBV Electrolink Power Electronics / Power Management
Infineon Technologies’ iMOTION IMD110-6 is a series of highly integrated ICs for the control of three-phase motors. The devices integrate the motor controller with a high-voltage, three-phase gate driver ...

Read more...
Open-frame 80 W DC/DC converter
Vepac Electronics Power Electronics / Power Management
A new 80 W DC/DC converter has been added to Cosel’s value-added STMGF platform. Available in two versions, the STMGFS80 covers all industrial voltages from 9 V to 76 V. Using Cosel’s efficient MGFS80 ...

Read more...
Power stack reference design leverages Microchip SiC devices
Future Electronics Power Electronics / Power Management
E-mobility and renewable energy systems require power management solutions that drive performance and cost efficiencies in addition to speeding up development time. To keep pace with these requirements, ...

Read more...