BD12780MUV-LB中文资料Hot Swap Controller and Digital Power and Energy Monitor with PMBus Interface数据手册ROHM规格书

描述 Description

This product is a rank product for the industrial equipment market. This is the best product for use in these applications. The BD12780MUV-LB is a hot swap controller with PMBus Interface. It has load current, input voltage, output voltage, external N-channel FET power and temperature monitors via integrated 12-bit ADC. The BD12780MUV-LB senses the voltage across the external sense resistor from the HSP and HSN pins, amplifies the voltage with an internal current sense amplifier, and measures the load current to limit the current. The BD12780MUV-LB controls the gate voltage of the external N-channel FET so that the load current is maintained around the current limit level. When the load current reaches the current limit threshold, the timer operates to limit the load current with the FET ON for the time determined by the capacitor connected to the TIMER pin. In addition, a constant power foldback scheme is used to control MOSFET power consumption in the event of a power-on or failure. This power limit keeps the FET within the safe operating area. When a short-circuit event occurs, the fast internal overcurrent detector responds within 320 ns and shuts down the gate of the external FET. The BD12780MUV-LB has under voltage and over voltage detection of the input voltage at UV and OV pins, and the detection voltage levels can be programmed with external resistor divider. The output voltage is also monitored at PWGIN pin with external resistor divider and the PWRGD signal is the indicator if the input and output voltages are within normal range.

特性 Features

• ±0.7 % accurate, 12-bit ADC for IOUT, VIN, VOUT, and temperature
• 320 ns response time to short circuit
• Shutdown upon FET health fault detection
• Constant power foldback for tighter FET SOA protection
• Remote temperature sensing with programmable warning and shutdown thresholds
• Resistor-programmable 5 mV to 25 mV 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 1.3 compliant interface