Analog Devices Inc. ADM1278 Hot Swap Controller with PMBus™ Interface
Analog Devices Inc. ADM1278 Hot Swap Controller with PMBus™ Interface allows a circuit board to be removed from or inserted into a live backplane. ADM1278 also features current, voltage, and power readback via an integrated 12-bit analog-to-digital converter (ADC), accessed using a PMBus interface. The load current is measured using an internal current sense amplifier that measures the voltage across a sense resistor in the power path via the HS+ and HS− pins. A default current limit of 20mV is set, but this limit can be adjusted, if required, using a resistor divider network from the internal reference voltage to the ISET pin. The ADM1278 Hot Swap Controller is ideal for servers, power monitoring and control/power budgeting, central office equipment, and telecommunication and data communication equipment.
Features
- ±0.3% accurate, 12-bit ADC for IOUT, VIN, VOUT, and temperature
- 320ns response time to short circuit
- Shutdown on detection of FET health fault
- Split hot swap and power monitor inputs to allow additional external ADC filtering
- Constant power foldback for tighter FET SOA protection
- Remote temperature sensing with programmable warning and shutdown thresholds
- Resistor-programmable 5mV to 25mV VSENSE current limit
- Programmable start-up current limit
- 1% accurate UV and OV thresholds
- Reports power and energy consumption over time
- Peak detect registers for current, voltage, and power
- PROCHOT power throttling capability
- PMBus fast mode compliant interface
- 5mm × 5mm, 32-lead LFCSP
Applications
- Servers
- Power monitoring and control / power budgeting
- Central office equipment
- Telecommunication and data communication equipment
Typical Application Circuit
Published: 2014-10-16
| Updated: 2022-03-11