SLVS727E November   2006  – October 2019 TPS2410 , TPS2411

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Diagram
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
    1.     Pin Functions, PW
    2.     Pin Functions, RMS
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics: TPS2410, 11
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Device Pins
        1. 8.3.1.1  A, C:
        2. 8.3.1.2  BYP:
        3. 8.3.1.3  FLTR:
        4. 8.3.1.4  FLTB:
        5. 8.3.1.5  GATE:
        6. 8.3.1.6  GND:
        7. 8.3.1.7  RSET:
        8. 8.3.1.8  RSVD:
        9. 8.3.1.9  STAT
        10. 8.3.1.10 UV, OV, PG:
        11. 8.3.1.11 VDD:
      2. 8.3.2 Gate Drive, Charge Pump and C(BYP)
      3. 8.3.3 Fast Comparator Input Filtering – C(FLTR)
      4. 8.3.4 UV, OV, and PG
      5. 8.3.5 Input ORing and Stat
    4. 8.4 Device Functional Modes
      1. 8.4.1 TPS2410 vs TPS2411 – MOSFET Control Methods
  9. 9 Application and Implementation
    1. 9.1 Typical Connections
      1. 9.1.1 N+1 Power Supply
      2. 9.1.2 Input ORing
    2. 9.2 Typical Application Examples
      1. 9.2.1 VDD, BYP, and Powering Options
      2. 9.2.2 Bidirectional Blocking and Protection of C
      3. 9.2.3 ORing Examples
      4. 9.2.4 Design Requirements
        1. 9.2.4.1 MOSFET Selection and R(RSET)
        2. 9.2.4.2 TPS2410 Regulation-loop Stability
      5. 9.2.5 Detailed Design Procedure
      6. 9.2.6 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Recommended Operating Range
    2. 10.2 System Design and Behavior with Transients
  11. 11Layout
    1. 11.1 Layout Considerations
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
    2. 12.2 Related Links
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.4.2 TPS2410 Regulation-loop Stability

The TPS2410 uses an internal linear error amplifier to keep the external MOSFET from saturating at light load. This feature has the benefits of setting a turn-off above 0 V, providing a soft turn-off for slowly decaying input voltages, and helps droop-sharing redundancy at light load.

Although the control loop has been designed to accommodate a wide range of applications, there are a few guidelines to be followed to assure stability.

  • Select a MOSFET C(ISS) of 1 nF or greater
  • Use low ESR bulk capacitors on the output C terminal, typically greater than 100 μF with less than 50 mΩ ESR
  • Maintain some minimum operational load (e.g. 100 mA or more)

Symptoms of stability issues include V(AC) undershoot and possible fast turn-off on large-transient recovery, and a worst-case situation where the gate continually cycles on and off. These conditions are solved by following the rules above. Loop stability should not be confused with tripping the fast comparator due to V(AC) tripping the gate off.

Although not common, a condition may arise where the dc/dc converter transient response may cause the GATE to cycle on and off at light load. The converter experiences a load spike when GATE transitions from OFF to ON because the ORed bus capacitor voltage charges abruptly by as much as a diode drop. The load spike may cause the supply output to droop and overshoot, which can result in the ORed capacitor peak charging to the overshoot voltage. When the supply output settles to its regulated value, the ORed bus may be higher than the source, causing the device to turn the GATE off. While this may not actually cause a problem, its occurrence may be mitigated by control of the power supply transient characteristic and increasing its output capacitance while increasing the ORed load to capacitance ratio. Adjusting the TPS2410 turn-off threshold or using STAT if possible to desensitize the redundant ORing device may help as well. Careful attention to layout and charge-pump noise around the device helps with noise margin.

The linear gate driver has a pull-up current of 290 μA and pull-down current of 3 mA typical.