TPS60121PWPG4

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TPS60121PWPG4 Application Field and Working Principle

Power management integrated circuits (PMICs) are designed to manage and deliver power to digital and analog systems, including battery- and grid-powered applications. The TPS60121PWPG4 is an integrated high-efficiency, buck-boost battery charger from Texas Instruments. It converts and controls input voltages from 3 V to 28 V into a regulated output voltage suitable for charging NiCd and NiMH batteries, as well as single-cell Li-ion batteries with up to 2 A rated current.

The TPS60121PWPG4 is categorized as a PMIC and as a DC-DC switching regulator. With a small footprint and integrated power-saving features like ultra-low-quiescent current (<25-μA) and integrated high-side power MOSFET, it is designed to preserve battery life and minimize board space, while meeting the demands of a wide range of applications. In addition, the TPS60121PWPG4 is compliant with EN55032 CISPR32 Class B requirements.

Applications

Due to its features, the TPS60121PWPG4 is ideally suited for a variety of applications, including handheld gaming and instrumentation devices, power supplies, and wearable devices. It is a simple and cost-effective way to supply the energy demands of applications that rely on single-cell Li-ion batteries, such as cordless phones, two-way radios, and portable medical devices.

Working Principle

The TPS60121PWPG4 works by converting an input voltage of 3 V to 28 V into a regulated output voltage that is suitable for charging Li-ion batteries and other secondary batteries. The device offers a wide range of advantages and features, including an internally set buck-Boost input voltage of 3 – 28 V, a continuous output current of up to 2 A, a wide range of output voltage settings, auto-flush shutdown available on battery insertion and removal, adjustable discharge time, and integrated power-saving features such as ultra-low-quiescent current (25-μA) and adjustable low-voltage cut-off.

The device offers a high level of protection for the connected load, including protection from over-temperature, over-voltage, over-current and short-circuits. It also features low-side rechargeable MOSFETs with a low RDSon of only 6.5 mΩ and integrated high-side power MOSFET with high power density, as well as lead-free, RoHS-compliant packaging.

The TPS60121PWPG4 can operate in either of two modes – Continuous Conduction Mode (CCM) or Discontinuous Conduction Mode (DCM). CCM is used in applications where output load is constant and no current surge is required. DCM is used in applications that require a short duration of high current demand, such as when charging a battery. In addition, it is also capable of operating in Burst Mode, which is used in continuous load applications where there is a short duration of high current demand.

In addition to its features, the TPS60121PWPG4 includes integrated safety features, such as a thermal shutdown protection, a voltage monitoring window, and embedded system reset. The device also offers an integrated temperature measurement and an under-voltage lockout feature that can be used to protect the connected load from going into a low-voltage state.

Conclusion

The TPS60121PWPG4 is an integrated high-efficiency, buck-boost battery charger. It converts and controls input voltages from 3 to 28 V into a regulated output voltage suitable for charging NiCd and NiMH batteries, as well as single-cell Li-ion batteries with up to 2 A rated current. With its wide range of features, the TPS60121PWPG4 is ideally suited for a variety of applications, including handheld gaming and instrumentation devices, power supplies, and wearable devices. Its features include an internally set buck-boost input voltage, continuous output current up to 2 A, automatic flush shutdown, adjustable discharge time, and integrated power-saving features. The device is also RoHS-compliant and includes safety features such as thermal shutdown protection and embedded system reset.

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