New Compact CMOS Li-Ion Battery Charger Using Charge-Pump Technique for Portable Applications

Hwang, Yuh‐Shyan; Wang, Shu-Chen; Yang, F.; Chen, Jiann‐Jong

doi:10.1109/tcsi.2007.890605

Cited by 86 publications

(37 citation statements)

References 9 publications

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“…Although reported efficiencies for designs presented in [9], [10] and [11] are maximal charging efficiencies, still they have a lower efficiency comparing with the proposed battery charger.…”

Section: System Integration and Performancementioning

confidence: 83%

An ultra-low power li-ion battery charger for micro-power solar energy harvesting applications

Pour

Facchin

Krummenacher

et al. 2012

2012 19th IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2012)

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This paper presents an ultra-low power, fully integrated solar energy harvester circuit for autonomous microsystems. The proposed circuit harvests solar energy from a micro-power photovoltaic module and stores the harvested energy in a miniaturized thin film Li-Ion microbattery, using a highly area-and power-efficient power management circuit. As neither inductor, nor large pumping capacitors have been used in this circuit, it occupies less area comparing to conventional inductive and switched-capacitor DC-DC converters. In addition, thanks to low power design of this circuit, it achieves more than 94% efficiency during battery charging. Even under reduced light intensity, when the harvested energy is only a few tens of microwatts, more than 92% efficiency is achievable. The proposed microsystem has been implemented in a 0.18µm CMOS process and occupies a core area of only 0.12mm 2 . This circuit features a low power consumption of 270nW in average.

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Section: System Integration and Performancementioning

confidence: 83%

An ultra-low power li-ion battery charger for micro-power solar energy harvesting applications

Pour

Facchin

Krummenacher

et al. 2012

2012 19th IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2012)

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“…However, the design of soft-start increases the area and the complexity of charging controller circuit. In [4][5][6], charge pump technique is utilized in order to optimize the power consumption towards potable applications. This design achieves quite low power consumption but the efficiency is reduced in comparison to other structures.…”

Section: Introductionmentioning

confidence: 99%

A novel Li-ion battery charger using multi-mode LDO configuration based on 350 nm HV-CMOS

Nguyen

Pham

Hoang

2016

Analog Integr Circ Sig Process

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The design of a novel Li-ion battery charger using multi-mode LDO architecture has been introduced in this paper. The proposed architecture, using an improved multi-mode LDO, not only obtains high accuracy but also reduces power supply noise because of utilizing novel error amplifier and power buffer configuration; while still consuming low power dissipation. To obtain the low power consumption, the Schmitt Trigger technique is applied to the charging controller and an optimized current driven circuit is proposed. Besides, the PSRR parameter is also enhanced by adding pre-regulation circuit in multi-mode LDO circuit. Thus, the proposed Li-ion battery charger achieves 700 mA operation current with 70.9 % efficiency but only dissipates 495 mW in power. During the charging process, the setting time and ripple issues are solved by the use of soft-start circuit which is integrated into the charging controller in order to decrease the chip area. Therefore, the setting time is reduced to 5.5 ls while gaining the load regulation at approximately 0.019 lV/mA and increasing PSRR up to 106 dB at DC level. Moreover, the line regulation is also reduced at 1.3 mV/V. The proposed linear battery charger is designed and implemented, based on High-Voltage CMOS process with using 4.5 V power supply voltage and obtaining 4.2 V battery output voltage.

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“…Power consumption of CMOS integrated circuits has been reduced to milliwatts, thus CMOS ICs can be powered by button-sized Li-ion rechargeable batteries. Therefore, a battery charger able to convert energy from a solar cell to a Li-ion battery would be very useful [3]. Figure 1 illustrates the architecture of the proposed charger.…”

Section: Introductionmentioning

confidence: 99%

Solar Battery Charger in CMOS 0.25 um Technology

Wang

Huang

Wang

2014

AUSMT

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A solar cell powered Li-ion battery charger in CMOS 0.25um is proposed. The solar battery charger consists of a DC/DC boost converter and a battery charger. The voltage generated by a solar cell is up converted from 0.65V to 1.8V, which is used as the VDD of the battery charger. In this way, the solar battery charger automatically converts solar energy to electricity and stores it directly to a Li-ion rechargeable battery. In this system, a super capacitor is needed as a charge buffer between the boost converter and the charger.

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New Compact CMOS Li-Ion Battery Charger Using Charge-Pump Technique for Portable Applications

Cited by 86 publications

References 9 publications

An ultra-low power li-ion battery charger for micro-power solar energy harvesting applications

An ultra-low power li-ion battery charger for micro-power solar energy harvesting applications

A novel Li-ion battery charger using multi-mode LDO configuration based on 350 nm HV-CMOS

Solar Battery Charger in CMOS 0.25 um Technology

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