TPS2493PWR - 80V Hot Swap Controller w/ Power Limit | Texas Instruments
MPN: TPS2493PWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.35 | $235.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
TPS2493PWR Overview
What is a hot-swap controller? A hot-swap controller is a power-management IC that safely inserts a board or sub-system into a live backplane by inrush-limiting and protecting the upstream supply against catastrophic short-circuit faults. Hot-swap controllers sit hierarchically under power management ICs (PMICs), alongside eFuse devices, ORing controllers, and ideal-diode controllers; together they form the system-protection layer between a raw supply rail and the point-of-load regulators that follow it.
Key specifications of the TPS2493 include 9 V to 80 V operating range, programmable power-limit foldback, an adjustable current-limit threshold, fault timer with auto-retry, an analog current-monitor output (IMON) proportional to load current, and an internal charge pump capable of driving the gate of a high-side N-channel FET. The device uses an external sense resistor (RSENSE) for current sensing and two resistors to program the power-limit reference, giving the designer full SOA-tailoring flexibility. The wide VIN range makes it well-suited to 12 V, 24 V, 28 V, and 48 V industrial busses, including telecom -48 V feeds after rectification.
Architecturally, the TPS2493 employs a constant-power foldback loop that dynamically reduces the allowable current as VDS across the FET rises, ensuring the FET operates within SOA across the full range of load and input conditions. The analog IMON output reflects the sensed current with a transconductance that allows direct interfacing to an ADC or comparator. Fault-handling includes a programmable fault timer and Auto-Retry response (vs. TPS2492 latch-off), allowing the controller to clear transient faults without system intervention.
Typical applications include hot-swap insertion in 24 V industrial PLC chassis, 48 V telecom board in-rush protection, RAID and server backplane power switching, 36 V battery-pack protection in e-mobility, and any +12 V/+24 V distributed-power bus that must tolerate load transients on insertion.
When designing with the TPS2493, choose RSENSE based on worst-case load current, then verify the FET SOA curve against the programmed power-limit profile across VDS = 0 V to VINmax. Decouple VCC with a 1 µF X7R close to the pin, keep the SENSE traces short, and add a TVS such as SMBJ33A at the input for surge immunity. Use the IMON output for system telemetry and tie FAULT to a host GPIO to log fault events.
This page synthesizes distributor pricing, datasheet-cited specifications, drop-in alternatives from the same TI HotSwap family, and practical design notes that go beyond what appears on the TI datasheet cover page.
Drop-in alternatives for TPS2493PWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS2492PWR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2491PWR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2490PWR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2483PWR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS2393PWR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS2493PWR Specifications
| Function | Hot-Swap Controller (positive high voltage) |
| Operating Voltage Range (V_IN) | 9 V to 80 V |
| Topology | High-side drive, external N-channel FET |
| Number of Channels | 1 |
| Current Limit | Adjustable (via external RSENSE) |
| Power Limit | Programmable power foldback (constant-power SOA protection) |
| Fault Response | Auto-Retry (vs. TPS2492 latch-off) |
| Current Monitor Output | Analog IMON output proportional to load current |
| Gate Drive | Internal charge pump for external N-FET |
| Package | 14-TSSOP (PW, 4.40 mm body) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C |
| MSL Level | 1 (260 C, unlimited floor life) |
| RoHS Status | Compliant |
TPS2493PWR Pin Configuration
| Pin 1 | VCC — Supply voltage / power to the controller |
| Pin 2 | OUT — Output voltage sense (after FET, used for power foldback) |
| Pin 3 | GND — Ground |
| Pin 4 | SENSE — Current sense input (across RSENSE) |
| Pin 5 | IMON — Analog current monitor output |
| Pin 6 | PRL — Power-reference / power-limit programming |
| Pin 7 | TIMER — Fault timer capacitor |
| Pin 8 | FLT — Fault indicator (open-drain) |
| Pin 9 | EN — Enable (active high) |
| Pin 10 | GATE — Gate drive to external N-FET |
| Pin 11 | VDD — Internal regulated supply for gate drive |
| Pin 12 | PROG — Programming pin for current limit / response |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
Typical Applications
TPS2493PWR is suitable for 6 applications: Industrial 24 V PLC Hot-Swap Insertion, 48 V Telecom Board Inrush Protection, Server / Storage Backplane RAID Power Switching, 36 V E-Mobility Battery Pack Protection, 12 V Distributed Power Bus Protection, PoE / High-Voltage PSE Port Switching.
Industrial 24 V PLC Hot-Swap Insertion
The TPS2493PWR's 9 V-80 V operating window and programmable constant-power foldback make it ideal for 24 V industrial PLC chassis hot-swap. When a new I/O module is inserted into a live backplane, RSENSE-programmed inrush limit and the PRL-set power foldback keep the upstream 24 V rail within regulation while preventing FET SOA violation. Unlike a simple fuse, the TPS2493 Auto-Retry recovers after the fault timer without operator intervention, ideal for unmanned cabinets.
Recommended
48 V Telecom Board Inrush Protection
Telecom -48 V backplanes require negative-to-positive conversion followed by 48 V-54 V hot-swap protection; the TPS2493PWR's 80 V rating easily covers the rectified bus, and its analog IMON output provides per-port load telemetry to the system controller. The constant-power foldback prevents FET failure during short-to-ground events at the connector pins, while the Auto-Retry response avoids service truck rolls for transient overloads.
Recommended
Server / Storage Backplane RAID Power Switching
Hot-swappable RAID drives and server backplanes need per-port inrush control to prevent rail collapse when multiple drives spin up simultaneously. The TPS2493PWR's adjustable current limit and analog IMON enable the BMC (baseboard management controller) to monitor each port's load in real time, detecting failing motors or shorts before they propagate. The 14-TSSOP footprint fits densely populated backplane controllers.
Recommended
36 V E-Mobility Battery Pack Protection
36 V-48 V e-mobility battery packs and e-bike systems benefit from the TPS2493PWR's wide VIN range and constant-power foldback to safely connect and disconnect the battery from the motor controller and BMS. During a short circuit on the motor phase, the gate is pulled low within microseconds and Auto-Retry attempts recovery once the fault cools down, protecting both the FET and the battery cells from thermal runaway.
Recommended
12 V Distributed Power Bus Protection
Standard 12 V distributed power busses in computing and industrial systems benefit from TPS2493PWR hot-swap protection at every load entry point. The adjustable current limit allows per-design-equt tuning to match connector ratings, while the programmable fault timer differentiates between brief transients and sustained faults. The Auto-Retry behavior reduces field service calls by automatically recovering from intermittent faults.
Recommended
PoE / High-Voltage PSE Port Switching
Power-over-Ethernet (PoE) Power Sourcing Equipment (PSE) controllers operate up to 57 V on the pairs and require per-port hot-swap behavior similar to telecom applications. The TPS2493PWR provides the high-side switching element with adjustable current limit and analog IMON for per-port power measurement. The Auto-Retry capability handles PSE classification retries automatically, simplifying the MCU state machine.
Recommended
Recommended Products Summary
Engineering reference data for TPS2493PWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS2492PWR | TPS2491PWR | TPS2490PWR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-TSSOP (PW) | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same |
| Programmable Power Foldback | Yes | Yes | Yes | Yes |
| External FET | N-Channel | N-Channel | N-Channel | N-Channel |
Key Differentiators
- Auto-Retry fault recovery vs. latch-off in TPS2492 (vs TPS2492PWR)
- Wide 80 V VIN supports 48 V telecom directly (vs TPS2491PWR)
- Analog IMON output for system telemetry (vs TPS2490PWR)
Design Notes
Estimated: the TPS2493PWR itself dissipates only the gate-drive charge from its internal charge pump (typically <100 mW even with a large FET), so thermal design focuses on the external N-FET. Verify the FET's transient thermal impedance (ZthJC) can absorb the inrush energy budget: E_inrush = 0.5 * C_load * V_IN^2, with safe limits per FET SOA graph from the datasheet.
Recommended: keep the SENSE traces (pin 4 to RSENSE and back to GND) as short as possible (under 5 mm) and use a Kelvin connection. Place RSENSE close to the source of the external N-FET. Decouple VCC (pin 1) with a 1 µF X7R ceramic within 3 mm of the pin; an additional 10 µF bulk is recommended on VIN for large transient loads. The thermal pad of the FET should be on a copper pour of at least 100 mm^2.
Critical: do not use a P-channel FET with the TPS2493PWR; the controller is designed for high-side N-channel only. Do not exceed 80 V on VCC; even brief transients above 80 V can damage the controller. Ensure the TIMER capacitor is rated for the programmed fault interval, and that PRL programming resistors use 1% tolerance to maintain accurate power foldback. Finally, do not leave the GATE pin floating - the internal charge pump will charge it to VDD and partially turn on the FET at power-up without proper sequencing.
Recommended: the IMON output (pin 5) is a high-impedance current source that should drive a resistor to GND (typically 5-10 kOhm for 0-3.3 V telemetry). Route the IMON trace away from switching nodes (GATE, OUT, VIN) and add a small RC filter (100 ohm + 1 nF) if the signal is feeding a long cable or noisy ADC input. Use a unity-gain buffer (e.g. TLV9061) if multiple loads are tapped from IMON.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified - choose TPS2493-Q1 suffix variant for automotive applications. REACH compliance not explicitly stated in provided data - marked unknown.
