Analog Devices Inc. ADM1281 Hot-Swap Controllers
Analog Devices ADM1281 Hot-Swap Controllers are designed for a circuit board to be removed from or inserted into a live backplane. The ADM1281 delivers current, power, voltage, and temperature readback through an integrated 12-bit analog-to-digital converter (ADC), accessed utilizing a PMBus™ interface. The load current is gauged employing an internal current sense amplifier that measures the voltage across a sense resistor in the power path through the HS+ and HS- pins. A default current limit of 20mV is set, but this limit can be adjusted if needed.
The Analog Devices ADM1281 is housed in a 32-lead LFCSP with a RETRY pin that can be formatted for automatic retry or latch-off when an overcurrent fault occurs.
Features
- Drop-in replacement to ADM1278
- ±0.3% accurate, 12-bit ADC for IOUT, VIN, VOUT, and temperature
- 290ns response time to short-circuit
- Shutdown on detection of FET health fault
- 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, OV, and PWRGD thresholds
- Split hot-swap and power monitor inputs to allow additional external ADC filtering
- Reports power and energy consumption over time
- Peak detect registers for current, voltage, and power
- PROCHOT power throttling capability
- PMBus fast mode compliant interface
- Available in 5mm x 5mm, 32-lead LFCSP package
Applications
- Servers
- Power monitoring and control/power budgeting
- Telecommunication and data communication equipment
TYPICAL APPLICATION CIRCUIT
Publicerad: 2024-06-28
| Uppdaterad: 2024-07-17