TPS54821
Synchroner Abwärtswandler, 4,5 bis 17 V Eingangsspannung, 8 A, mit Hiccup-Strombegrenzungsmodus
TPS54821
- Integrated 26 mΩ / 19 mΩ MOSFETs
- Split Power Rail: 1.6 V to 17 V on PVIN
- 200 kHz to 1.6 MHz Switching Frequency
- Synchronizes to External Clock
- 0.6V ±1% Voltage Reference Over Temperature
- Low 2 µA Shutdown Quiescent Current
- Monotonic Start-Up into Pre-biased Outputs
- Adjustable Slow Start/Power Sequencing
- Power Good Output Monitor for Undervoltage and
Overvoltage - Adjustable Input Undervoltage Lockout
- Software Tools Available
The TPS54821 in thermally enhanced 3.5 mm × 3.5 mm QFN package is a full featured 17 V, 8 A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor's footprint.
The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.
Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the device when the die temperature exceeds the thermal shutdown temperature and enables the part again after the built-in thermal shutdown hiccup time.
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | TPS54821 4.5 V to 17 V Input, 8 A Synchronous Step Down Converter With Hiccup datasheet (Rev. B) | PDF | HTML | 10 Feb 2016 |
Application note | Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part I: Filter Design for Out | PDF | HTML | 27 Feb 2024 | |
Application note | Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part II: Hybrid Sense Network | PDF | HTML | 27 Feb 2024 | |
EVM User's guide | TPS54821 Step-Down Converter Evaluation Module User's Guide (Rev. A) | PDF | HTML | 20 Aug 2021 | |
Application note | How to Design a Simple and Highly Integrated Battery Testing System (Rev. B) | 02 Apr 2019 | ||
Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
More literature | Common Mistakes in DC/DC Converters and How to Fix Them | 14 Feb 2018 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
TPS54821EVM-049 — Evaluierungsmodul für TPS54821 Synchron-Abwärtswandler
TPS54821 TINA-TI Average Reference Design
TPS54821 Unencrypted PSpice Average Model Package (Rev. A)
TPS54821 Unencrypted PSpice Transient Model Package (Rev. A)
PMP15043 — Referenzdesign für Stromversorgungslösung mit 6 A, 0,05 % Stromgenauigkeit für Batterietestsysteme
Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
---|---|---|
VQFN (RHL) | 14 | Ultra Librarian |
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- Qualifikationszusammenfassung
- Kontinuierliches Zuverlässigkeitsmonitoring
- Werksstandort
- Montagestandort
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