The TPS2480/81 are designed to minimize inrush into applications and protect both the load and the FET from over-current or short circuit events. They control an external N-channel MOSFET switch and provide accurate voltage, current, and power monitoring using a configurable 12 bit A/D converter via an I²C interface. The independently adjustable power limit and current limit ensure that the external MOSFET operates within the FET’s Safe Operating Area (SOA).

The flexible design includes a Power Good output which can be used for sequencing as well as load fault indication. An external timer capacitor can set the fault time to help immunize the system from nuisance shutdowns during brief transient events.

The monitoring circuitry incorporates a high accuracy A/D converter which can be configured from a 9 to 13 bit converter. The internal gain of the A/D can be configured to scale the current, voltage and power readings to the needs of the application. An additional multiplying register calculates power in Watts. The I²C interface uses multi-level addressing to allow up to 16 programmable addresses.

The TPS2480 and TPS2481 monitors shunts on buses that can vary from 9 V to 26 V and with a few external components it is possible to monitor buses as high as 80 V.

The monitoring circuitry uses a single 3-V to 5.5-V supply, drawing a maximum of 1 mA of supply current.

• Programmable FET Power Limit
• External N-Channel FET Gate Drive
• Programmable Fault Timer
• Open Drain Power Good Output
• I2C monitoring of Current, Voltage and Power
• High Accuracy Current Monitoring (1% over temperature)
• Dynamic Calibration
• 9-V to 26-V Input Range
• APPLICATIONS
  • Servers
  • Hard Drives
  • Storage Networks
  • Base Stations

• FET
• External
• Vin (Min) (V)
• 9
• Vin (Max) (V)
• 80
• Vabsmax_cont (V)
• 26
• Current limit (Min) (A)
• 0.01
• Current limit (Max) (A)
• 500
• Overcurrent response
• Circuit breaker, Current limiting
• Fault response
• Auto-retry

TPS2481的完整型号有：TPS2481PW、TPS2481PWR，以下是这些产品的关键参数及官网采购报价：

TPS2481PW，工作温度：-40 to 125，封装：TSSOP (PW)-20，包装数量MPQ：70个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS2481PW的批量USD价格：2.429（1000+）

TPS2481PWR，工作温度：-40 to 125，封装：TSSOP (PW)-20，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS2481PWR的批量USD价格：2.024（1000+）

TPS2480 and TPS2481 GUI File

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