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

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 μs while gaining the load regulation at approximately 0.019 μV/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.

[1]  B. R. Gregoire,et al.  A Compact Switched-Capacitor Regulated Charge Pump Power Supply , 2006, IEEE Journal of Solid-State Circuits.

[2]  Robert G. Meyer,et al.  Analysis and Design of Analog Integrated Circuits , 1993 .

[3]  Edgar Sánchez-Sinencio,et al.  Full On-Chip CMOS Low-Dropout Voltage Regulator , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[4]  Cong-Kha Pham,et al.  A DC-DC Converter using a high speed soft-start control circuit , 2010, Proceedings of 2010 IEEE International Symposium on Circuits and Systems.

[5]  Jiann-Jong Chen,et al.  An omnipotent Li-Ion battery charger with multimode controlled techniques , 2013, 2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS).

[6]  Chao Liu,et al.  Study on impedance model of Li-ion battery , 2011, 2011 6th IEEE Conference on Industrial Electronics and Applications.

[7]  Marty Brown,et al.  Power Supply Cookbook , 1994 .

[8]  Min Chen,et al.  Accurate electrical battery model capable of predicting runtime and I-V performance , 2006, IEEE Transactions on Energy Conversion.

[9]  V.L. Teofilo,et al.  Advanced lithium ion battery charger , 1997, Fifteenth Annual Battery Conference on Applications and Advances (Cat. No.00TH8490).

[10]  Rahul Sarpeshkar,et al.  An Area and Power-Efficient Analog Li-Ion Battery Charger Circuit , 2011, IEEE Transactions on Biomedical Circuits and Systems.

[11]  Jong-Wook Lee,et al.  A Fully Integrated Multimode Wireless Power Charger IC With Adaptive Supply Control and Built-In Resistance Compensation , 2015, IEEE Transactions on Industrial Electronics.

[12]  Yuh-Shyan Hwang,et al.  A multi-mode LDO-based Li-ion battery charger in 0.35/spl mu/m CMOS technology , 2004, The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings..

[13]  Menglian Zhao,et al.  Li-Ion battery charger with smooth-switch-over four-stage control , 2009, Proceedings of the 2009 12th International Symposium on Integrated Circuits.

[14]  Chia-Chun Tsai.  A reduced Li-Ion battery charger for portable applications , 2013, 2013 Ninth International Conference on Natural Computation (ICNC).

[15]  Teemu Lehmuspelto,et al.  Time-Domain Parameter Extraction Method for Thévenin-Equivalent Circuit Battery Models , 2014, IEEE Transactions on Energy Conversion.

[16]  Michael Baker,et al.  A 0.18-$ \mu{\hbox {m}}$ Monolithic Li-Ion Battery Charger for Wireless Devices Based on Partial Current Sensing and Adaptive Reference Voltage , 2012, IEEE Journal of Solid-State Circuits.

[17]  Xiao-bo Wu,et al.  Switch-mode multi-power-supply Li-ion battery charger with power-path management , 2010, 2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology.

[18]  Gabriel A. Rincón-Mora,et al.  Accurate, Compact, and Power-Efficient Li-Ion Battery Charger Circuit , 2006, IEEE Transactions on Circuits and Systems II: Express Briefs.

[19]  Hoi Lee,et al.  A Compact Ramp-Based Soft-Start Circuit for Voltage Regulators , 2009, IEEE Transactions on Circuits and Systems II: Express Briefs.

[20]  Jader A. De Lima.  A compact and power-efficient CMOS battery charger for implantable devices , 2014, 2014 27th Symposium on Integrated Circuits and Systems Design (SBCCI).

[21]  Phillip E Allen,et al.  CMOS Analog Circuit Design , 1987 .

[22]  Jiann-Jong Chen,et al.  A High-Efficiency Multimode Li–Ion Battery Charger With Variable Current Source and Controlling Previous-Stage Supply Voltage , 2009, IEEE Transactions on Industrial Electronics.