SA57608 Datasheet, PDF (2/10 Pages) NXP Semiconductors – One-cell Lithium-ion battery protection with over/undercharge and overcurrent protection

Philips Semiconductors
One-cell Lithium-ion battery protection with
over/undercharge and overcurrent protection
GENERAL DESCRIPTION
The SA57608 is a single-cell Li-ion protection IC, and is an improved
version of the NE57600, with different pinout. Its over and under
voltage accuracies are trimmed to within ± 25 mV (5%) over the
entire battery pack operating temperature range. The SA57608 is
available in various over and undervoltage limits.
There is a discharge overcurrent protection circuit which can protect
the battery pack against an accidental short-circuit. The overcharge
trip point has a time delay which can be programmed externally. It is
packaged in a space-saving 6-lead small outline package and
requires two external N-channel MOSFETs and a minimum of
passive parts.
FEATURES
• Trimmed overvoltage trip point to within ±25 mV
• Programmable overvoltage trip time delay
• Trimmed undervoltage trip point to within ±25 mV
• Very Low undervoltage quiescent sleep current 0.05 mA
• Discharge overcurrent cutoff
• Low operating current (10 mA)
• 6-lead small outline package (SOP004)
APPLICATIONS
• Cellular phones
• Personal digital assistants
• Palmtop computers
SIMPLIFIED SYSTEM DIAGRAM
V+
100 Ω
V_{CC 5}
Li-ION CELL
0.1 µF
0.01 µF
C_{DLY 4}
SA57608
VM
2
GND ₆
DF 1
CF 3
0.1 µF
DISCHARGE
FET
CHARGE
FET
Figure 1. Simplified system diagram.
1 kΩ
V–
SL01568
Product data
SA57608
2003 Oct 29
2