Overview
The TPS2393PWR, produced by Texas Instruments, is a full-featured hot swap power manager integrated circuit designed for use in nominal −48-V systems. This device is optimized for live insertion of plug-in cards and modules in powered systems, providing essential functions such as electrical isolation of faulty cards, filtered protection against nuisance overcurrent trips, and single-line fault reporting.
The TPS2393 operates with a wide input supply range from −20 V to −80 V and is rated to withstand transient spikes up to −100 V. It features programmable current limit, current slew rate, and undervoltage/overvoltage thresholds, making it versatile for various high-voltage applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | −20 | −48 | −80 | V |
| Transient Rating | −100 | V | ||
| Operating Temperature Range | −40 | 85 | °C | |
| Current Limit | Programmable | A | ||
| Current Slew Rate | Programmable | A/s | ||
| UVLO Threshold | 1.20 | 1.35 | 1.50 | V |
| OVLO Threshold | 1.20 | 1.35 | 1.50 | V |
| Package Type | 14-Pin TSSOP, 44-Pin TSSOP |
Key Features
- Wide Input Supply Range: −20 V to −80 V with transient rating to −100 V
- Programmable Current Limit and Current Slew Rate
- Programmable Undervoltage and Overvoltage Thresholds/Hysteresis
- Debounced Insertion Detection Inputs
- Open-Drain Power Good (PG) Output and Open-Drain Fault Output (FAULT)
- Fault Timer to Eliminate Nuisance Trips
- Enable Input (EN)
- Periodic Retry Function in TPS2393 for Fault Recovery
Applications
- −48-V Distributed Power Systems
- Central Office Switching
- Wireless Base Station
Q & A
- What is the input voltage range of the TPS2393?
The input voltage range of the TPS2393 is from −20 V to −80 V, with a transient rating up to −100 V.
- What are the key features of the TPS2393?
The TPS2393 features programmable current limit, current slew rate, undervoltage and overvoltage thresholds, debounced insertion detection inputs, and open-drain power good and fault outputs.
- How does the fault timer work in the TPS2393?
The fault timer is programmed using an external capacitor connected to the FLTTIME pin. It protects against indefinite current sourcing into a faulted load and filters out nuisance trips from momentary current spikes.
- What is the difference between TPS2392 and TPS2393?
The TPS2392 latches off in response to current faults, while the TPS2393 periodically retries the load in the event of a fault.
- What is the purpose of the insertion detection inputs (INSA and INSB)?
The insertion detection inputs provide a mechanism for detecting the insertion of plug-in cards and modules, ensuring safe and controlled power-up.
- How is the current slew rate programmed in the TPS2393?
The current slew rate is programmed using an external capacitor connected between the IRAMP pin and the −VIN pin.
- What is the function of the Power Good (PG) output?
The Power Good output is an open-drain, active-low indication that the load power is in a good condition, ensuring that full programmed sourcing current is available to the load.
- What are the typical applications of the TPS2393?
The TPS2393 is typically used in −48-V distributed power systems, central office switching, and wireless base stations.
- What is the package type of the TPS2393?
The TPS2393 is available in 14-Pin TSSOP and 44-Pin TSSOP packages.
- How does the undervoltage/overvoltage protection work in the TPS2393?
The undervoltage and overvoltage protection is achieved through the UVLO and OVLO pins, which can be programmed using a three-resistor divider network.
