Current Limiting for Redundant Power Systems


Posted on Feb 6, 2014

The new TPS2359 hot-plug controller integrates all of the power management functions for two AdvancedMC (AMC) modules. Its current limiting circuitry enables designers to meet tight AMC requirements. This is relevant because many applications use redundant supplies. A unique feature called multiswap maintains a fixed current limit, regardless o


Current Limiting for Redundant Power Systems
Click here to download the full size of the above Circuit.

f the number of supplies connected to the load. The Advanced Telecom Computing Architecture (ATCA) standard provides a modular approach to designing telecom equipment. Adoption of this industry standard speeds product design and simplifies field upgrades. In the ATCA architecture, each carrier blade is required to contain up to eight AMC modules. These modules require hot-plug protection. The carrier board distributes two main power supplies to each AMC module: a 3. 3V management power supply, and a 12V payload power supply. In order to help designers meet these requirements, the TPS2359, a full featured dual-slot AdvancedMC controller was designed to provide all of the protection and monitoring circuitry required to support two AMC modules. The controller fully integrates management power inrush control, over-current protection, and FET ORing. Adding two external power transistors provides each payload power channel all of these same features. Figure 1 shows a simplified block diagram of a two-channel AMC application where both channels draw from common supplies. They can also draw from independent supplies. This unique controller integrates accurate current limiting for payload and management power channels. The payload power current limit uses three external resistors per channel to implement the 8. 25A +/ 10% ATCA specification. The management power current limit uses one external resistor per channel to set the 195mA...




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Rain Detector
Automatic Emergency Lighting Unit
Power Mosfet Switch
555 circuits
Automatic Water Tank FillerCircuit Circuit
pic dmx interface software
Stepper motor driver using MC3479
LED torch using NSI45090JDT4G constant current regulator
Voltage-Doubler Circuit
4 ~ 20mA loop detection instrumentation amplifier circuit diagram ISO122P 124 XTR101 RCV420



Top