Overview
The TPS2411PW, produced by Texas Instruments, is a full-featured N+1 and ORing power rail controller. This device is designed to control and manage multiple power supplies in an N+1 redundant configuration or to combine redundant input power buses. It works in conjunction with an external N-channel MOSFET to emulate the function of a low forward-voltage diode, reducing power loss compared to traditional Schottky diodes. The TPS2411 features an on/off control method, distinguishing it from the TPS2410 which has a linear turn-on control. This controller is suitable for a variety of applications, including rack servers, telecom systems, and battery backup units, due to its robust monitoring and control capabilities.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range | 3 | 16.5 | V | |
| Operating Voltage Range (A to C) | 0.8 | 16.5 | V | |
| Operating Junction Temperature | -40 | 125 | °C | |
| Operating Free-Air Temperature | -40 | 85 | °C | |
| Junction-to-Ambient Thermal Resistance (TSSOP) | 148.3 | °C/W | ||
| Gate Saturated High Current | 1.2 | mA | ||
| Fast Turn-Off Threshold Voltage | 1 | 3 | 5 | mV |
| Turn-Off Delay | 70 | ns |
Key Features
- Wide supply voltage range of 3 V to 16.5 V and operating voltage range from 0.8 V to 16.5 V.
- On/off control method for the TPS2411, distinguishing it from the linear turn-on control of the TPS2410.
- Internal charge pump for N-channel MOSFET gate drive.
- Positive gate control on hot insertion and soft turn-on to reduce bus transients.
- Input voltage monitoring with programmable fast turn-off threshold.
- MOSFET control-state indicator and status pin for monitoring.
- Mosfet fault monitoring and shorted gate monitor.
- Adjustable turn-off threshold and fast comparator filtering.
- Enable control and voltage monitoring with OV and UV detection.
- Industrial temperature range: –40°C to 85°C.
- Industry-standard 14-Pin TSSOP package.
Applications
- Rack servers (rackmount and blade servers).
- Merchant network and server power supplies.
- Battery backup units.
- Telecom systems.
The TPS2411 is particularly useful in systems that require N+1 redundant power supplies or redundant power buses, ensuring reliable operation with minimal power loss.
Q & A
- What is the primary function of the TPS2411PW?
The TPS2411PW is a power rail controller that, in conjunction with an external N-channel MOSFET, emulates the function of a low forward-voltage diode to manage multiple power supplies in an N+1 redundant configuration.
- What is the supply voltage range for the TPS2411PW?
The supply voltage range is from 3 V to 16.5 V.
- What are the key differences between the TPS2410 and TPS2411?
The TPS2410 has a linear turn-on control, while the TPS2411 features an on/off control method.
- What is the purpose of the internal charge pump in the TPS2411PW?
The internal charge pump provides bias power to the comparators and voltage to drive the GATE of the external MOSFET.
- How does the TPS2411PW handle input voltage monitoring?
The device includes input voltage monitoring with programmable fast turn-off threshold and OV/UV detection.
- What are the thermal specifications for the TPS2411PW?
The operating junction temperature range is –40°C to 125°C, and the operating free-air temperature range is –40°C to 85°C.
- What package options are available for the TPS2411PW?
The device is available in a 14-Pin TSSOP package.
- How does the TPS2411PW protect against MOSFET faults?
The device includes MOSFET fault monitoring and a shorted gate monitor.
- What is the purpose of the FLTR pin in the TPS2411PW?
The FLTR pin allows for filtering the input to the fast comparator to ignore spurious transients on the A and C inputs.
- How does the TPS2411PW handle turn-off operations?
The device features a fast turn-off threshold voltage and a turn-off delay of approximately 70 ns.
