Overview
The TPS2412PWRG4, produced by Texas Instruments, is a power rail controller designed for N+1 and ORing power supply applications. This device, along with an external N-channel MOSFET, emulates the function of a low forward voltage diode, providing a more efficient and tunable alternative to traditional diodes. It is particularly useful in systems requiring redundant power supplies or power buses, such as rack servers, blade servers, merchant network and server power supplies, battery backup units, and telecom systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (VDD) | 3 | - | 16.5 | V |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
| Operating Free-Air Temperature (TA) | -40 | - | 85 | °C |
| Turnon Voltage | 7 | 10 | 13 | mV |
| Turnoff Threshold Voltage | 1 | 3 | 5 | mV |
| Gate Positive Drive Voltage (V(GATE-A)) | 6 | 7 | 8 | V |
| Gate Source Current | 250 | 290 | 350 | μA |
| Thermal Shutdown Temperature | 135 | - | - | °C |
| Thermal Hysteresis | 10 | - | - | °C |
| Package Type | TSSOP (8-pin), SOIC (8-pin) | - | - | - |
Key Features
- Linear and ON/OFF Gate Control: The TPS2412 provides linear turn-on control, while the TPS2413 offers ON/OFF control with hysteresis.
- Adjustable Turnoff Threshold: The turnoff threshold can be programmed using an external resistor connected to the RSET pin.
- Fast Comparator Filtering: Includes fast comparator filtering to ensure accurate voltage sensing and rapid response to changes in the input voltage.
- Voltage Monitoring and Enable Control: Features voltage monitoring and enable control to manage the power supply effectively.
- MOSFET Fault Monitoring: Monitors the external MOSFET for faults and provides status indication through a status pin.
- Thermal Shutdown and Hysteresis: Includes thermal shutdown with hysteresis to protect the device from overheating.
- Low Forward Voltage Drop: Emulates a low forward voltage diode, reducing power loss compared to traditional diodes.
Applications
- Rack Servers (Rackmount and Blade): Ideal for redundant power supply configurations in rack servers.
- Merchant Network and Server Power Supplies: Used in power supplies for network and server systems requiring high reliability.
- Battery Backup Units: Suitable for battery backup systems that need efficient power management.
- Telecom Systems: Applied in telecom systems for reliable and efficient power distribution.
Q & A
- What is the primary function of the TPS2412PWRG4?
The TPS2412PWRG4 is designed to emulate a low forward voltage diode in conjunction with an external N-channel MOSFET, allowing for efficient power combining in N+1 and ORing power supply applications.
- What are the key differences between the TPS2412 and TPS2413?
The TPS2412 provides linear turn-on control, while the TPS2413 offers ON/OFF control with hysteresis.
- How is the turnoff threshold programmed?
The turnoff threshold is programmed using an external resistor connected to the RSET pin.
- What is the operating temperature range of the TPS2412PWRG4?
The operating free-air temperature range is from -40°C to 85°C.
- What types of packages are available for the TPS2412PWRG4?
The device is available in 8-pin TSSOP and SOIC packages.
- What is the purpose of the BYP pin?
The BYP pin is the internal charge pump output and the positive supply voltage for internal comparator circuits and the GATE driver. A capacitor must be connected from BYP to GND.
- How does the device protect against thermal issues?
The device includes thermal shutdown with hysteresis to protect against overheating.
- What is the significance of the GATE pin?
The GATE pin controls the external N-channel MOSFET, driving it high to turn on the MOSFET and low to turn it off.
- What are some common applications of the TPS2412PWRG4?
Common applications include rack servers, merchant network and server power supplies, battery backup units, and telecom systems.
- How does the device handle MOSFET faults?
The device monitors the external MOSFET for faults and provides status indication through a status pin.
