A Single-Chip 60-V Bulk Charger for Series Li-Ion Batteries With Smooth Charge-Mode Transition

Author

Yang, Shang-Hsien ; Liu, Jen-Wei ; Wang, Chua-Chin

Author_Institution

Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

Volume

59

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

1588

Lastpage

1597

Abstract

In this paper, a single-chip 60-V battery charger prototype is presented. The newly proposed charge mode transition can ensure smooth transitions between incremental current (IC), constant current (CC), and constant voltage (CV) modes. The charger sources a current of 136 mA in CC mode and has an efficiency up to 92% during the charging sequence. Intentional saturation of both the IC and CV regulation loops ensure the stability of the charger throughout the charging sequence. Bonding PAD designed to remove the constraints on the aspect ratio of input transistors as a prevention of antenna effect is also disclosed. The proposed design has been implemented on silicon using the TSMC 0.25 μm 1-poly 3-metal bipolar-CMOS-DMOS (BCD) 60-V process.

Keywords

BiCMOS integrated circuits; CMOS integrated circuits; battery chargers; circuit stability; secondary cells; BCD process; CV regulation loops; IC regulation loops; TSMC 1-poly 3-metal bipolar-CMOS-DMOS process; antenna effect; aspect ratio; bonding PAD; charger stability; charging sequence; constant current modes; constant voltage modes; current 136 mA; incremental current modes; series Li-ion batteries; single-chip battery charger prototype; single-chip bulk charger; size 0.25 mum; smooth charge-mode transition; voltage 60 V; Batteries; Clamps; DC-DC power converters; Hysteresis; Logic gates; Transistors; Voltage control; Antenna effect; charger; constant current; constant voltage; high voltage integrated circuit; incremental current;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2011.2177137

Filename

6132452