TPS2393 - -48V Hot Swap Controller | Texas Instruments
MPN： TPS2393 ✓ 啟用中TPS2393 概覽
A hot swap controller is a power management IC that safely inserts or removes a circuit board from a live backplane without causing glitches or damage. It manages the inrush current during insertion, monitors the load current, and disconnects the load on fault conditions. In the power management hierarchy, a hot swap controller sits between the system power bus and the load, acting as an intelligent switch and protector.
Key features of the TPS2393 include a wide input voltage range of -20 V to -80 V, a programmable inrush current limit, and an active-low fault output for system monitoring. The device also provides a programmable undervoltage lockout (UVLO) and overvoltage protection, ensuring robust operation in harsh telecom environments. The TPS2393 is designed for -48-V systems, which are standard in telecommunications and networking equipment.
The TPS2393 uses a charge pump to drive an external N-channel MOSFET, allowing low-loss power path control. It includes a programmable timer for fault retry and a latch-off mode for persistent faults. The device is specified for the industrial temperature range (-40°C to +85°C) and is RoHS compliant. The 14-pin TSSOP package is compact and suitable for space-constrained designs.
Typical applications include telecom line cards, base station power distribution, server backplanes, and industrial -48-V power distribution systems. The TPS2393 is ideal for any system requiring safe board insertion and removal in a -48-V environment.
When designing with the TPS2393, ensure the external MOSFET is properly sized for the maximum load current and that the sense resistor is selected to set the desired current limit. The UVLO and fault timer resistors should be chosen to match the system's power-up requirements.
直接替換替代品，適用於 TPS2393 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TPS2393 （相同外形與佔位） — 差異在於 Operating Temperature Range.
TPS2393A
✅ 直接替換📋 參考替代品（不在目錄中）
TPS2392
✅ 直接替換📋 參考替代品（不在目錄中）
TPS2393PWR
✅ 直接替換📋 參考替代品（不在目錄中）
TPS2393PW
✅ 直接替換📋 參考替代品（不在目錄中）
TPS2393 最大額定值與電氣特性
| Supply Voltage Range | -20 V to -80 V |
| Absolute Maximum Voltage | -100 V |
| Number of Channels | 1 |
| 封裝 | 14-TSSOP |
| 工作溫度範圍 | -40°C to +85°C |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Inrush Current Limit | Programmable |
| Fault Output | Active-low |
| Undervoltage Lockout | Programmable |
| Overvoltage Protection | Yes |
| Fault Timer | Programmable |
| Latch-off Mode | Yes |
| Charge Pump | Internal |
| External MOSFET Drive | Yes |
TPS2393 腳位配置
| 腳位 1 | VIN — Negative input supply voltage |
| 腳位 2 | GATE — Gate drive for external MOSFET |
| 腳位 3 | SENSE — Current sense input |
| 腳位 4 | FAULT — Active-low fault output |
| 腳位 5 | UVLO — Undervoltage lockout programming |
| 腳位 6 | OVLO — Overvoltage lockout programming |
| 腳位 7 | TIMER — Fault timer programming |
| 腳位 8 | GND — Ground |
| 腳位 9 | VOUT — Output voltage to load |
| 腳位 10 | NC — No connect |
| 腳位 11 | NC — No connect |
| 腳位 12 | NC — No connect |
| 腳位 13 | NC — No connect |
| 腳位 14 | NC — No connect |
典型應用
TPS2393 適用於 6 應用s: Telecom Line Cards, Base Station Power Distribution, Server Backplanes, Industrial -48V Power Distribution, Networking Equipment, Battery Backup Systems.
Telecom Line Cards
The TPS2393 is ideal for telecom line cards operating on -48V backplanes. Its wide input range of -20V to -80V accommodates voltage variations, and the programmable inrush current limit prevents glitches during board insertion. The fault output enables system monitoring, ensuring reliable operation in central office equipment.
推薦
Base Station Power Distribution
In cellular base stations, the TPS2393 manages -48V power distribution to RF modules and digital boards. Its overvoltage protection and programmable fault timer safeguard against transients, while the charge pump drives an external MOSFET for efficient power path control. The industrial temperature range ensures operation in outdoor enclosures.
推薦
Server Backplanes
The TPS2393 enables safe hot-swapping of server blades in data centers. Its -48V compatibility suits telecom-style backplanes, and the programmable current limit prevents voltage droop during insertion. The latch-off mode protects against persistent faults, reducing downtime in high-availability systems.
推薦
Industrial -48V Power Distribution
For industrial control systems using -48V power, the TPS2393 provides robust hot swap protection. Its wide input range and overvoltage protection handle industrial transients, while the programmable UVLO ensures proper power-up sequencing. The 14-TSSOP package is suitable for compact PLC and industrial PC designs.
推薦
Networking Equipment
In routers and switches, the TPS2393 manages -48V power for line cards and interface modules. Its fault output and programmable timer enable system-level monitoring and protection. The device's ability to withstand -100V spikes ensures reliability in environments with power surges.
推薦
Battery Backup Systems
The TPS2393 is used in -48V battery backup systems to safely connect and disconnect battery banks. Its programmable current limit and overvoltage protection manage charging and discharging, while the latch-off mode prevents damage from sustained faults. The wide input range accommodates battery voltage variations.
推薦
推薦產品摘要
工程參考資料，適用於 TPS2393 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS2393A | TPS2392 | TPS2393PWR |
|---|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage Range | -20V to -80V | -20V to -80V | -20V to -80V | -20V to -80V |
| Insertion Detection Delay | No | Yes | No | No |
| Overvoltage Protection | Yes | Yes | No | Yes |
| Programmable Fault Timer | Yes | Yes | No | Yes |
| Packaging | Tube | Tube | Tube | Tape & Reel |
| Price (1pc) | $2.85 | $2.95 | $2.50 | $2.85 |
主要差異化特點
- Wide input voltage range of -20V to -80V (對比TPS2392)
- Overvoltage protection and programmable fault timer (對比TPS2392)
- Insertion and Removal Detection Delay (對比TPS2393A)
設計說明
The TPS2393 is designed for -48V systems. Ensure the external MOSFET is rated for the maximum input voltage plus spikes (-100V). Use a sense resistor with appropriate power rating to handle the inrush current. The charge pump provides gate drive, but the MOSFET gate capacitance should be considered for switching speed.
Place the sense resistor close to the SENSE pin to minimize parasitic inductance. Use Kelvin connections for accurate current sensing. The GATE pin should have a low-inductance path to the MOSFET gate. Provide adequate copper area for heat dissipation from the MOSFET.
Do not exceed the absolute maximum voltage of -100V. Ensure the UVLO and OVLO resistors are set correctly to avoid false triggering. The fault timer should be programmed to match the system's inrush time to prevent nuisance trips. Verify the latch-off mode behavior for your application.
合規資訊
RoHS compliant per TI product page. Not AEC-Q100 qualified.
