Datasheet

2.2 Features
3 Block Diagram
TPS2420/1
LOAD+
LOAD-
INDICATORS
POWER
GND
ENABLE
www.ti.com Block Diagram
• 3-V to 18-V Operation
• Controlled Inrush Current
• Fast Circuit Breaker Control
• Hardware Programmable
– Operating Current
– Fault Current
– Fault Timer to Avoid Nuisance Tripping
– Latch Off or Retry (TPS2420 is pin selectable, TPS2421-1 is latch-off only and TPS2421-2 is re-try
only.)
• LED status display
• A Slide Switch Controls the ENABLE Signal.
• The Area Under the TPS2420/1 is Copper Pour with Vias to the Internal Ground to take Advantage of
the Power Pad Package.
• A Transorb is On-Board for Over-Voltage Input Protection
• A Common Diode at the Output Prevents a Negative Spike if the Load is Removed While Powered On
• Programmable I
MON
Voltage Readout of the Output Current is Preset to 0.31 V / A
• Test Points Available to Monitor Circuit Operation
Figure 1. EVM Block Diagram
SLUU343 – January 2009 TPS2420 Hot Swap Controller System Test Board 3
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