TPS2480_1 Datasheet, PDF (1/54 Pages) Texas Instruments – Positive Voltage Intelligent Protection Device Hotswap Controller and I2C Current Monitor

www.ti.com
TPS2480
TPS2481
SLUS939A – APRIL 2010 – REVISED JUNE 2010
Positive Voltage Intelligent Protection Device
Hotswap Controller and I²C Current Monitor
Check for Samples: TPS2480, TPS2481
FEATURES
1
• 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 20-V Input Range
APPLICATIONS
• Servers
• Hard Drives
• Storage Networks
• Base Stations
DESCRIPTION
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.
Functional Block Diagram
9 V to 20 V
0.01 mF
0.01 mF
3.3 V to 5 V
2 mW
10 kW
10 kW
10kW
4 17 15 14 18 13 12
VS VINP VCC SENSE VINM GATE VOUT
2 SCL
PG 11
1 SDA
6 EN
TPS2480/1
7 VREF
190 kW
PROG GND GND A0 A1 TIMER
8
10 16 20 19 9
33 kW
0.01mF
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated