EGS5 Hardware Interface Description
3.5 Charging Control
75
EGS5_HD_v02.004
Page 44 of 123
2012-02-09
Confidential / Released
3.5.4
Charger Requirements
For using the implemented charging algorithm and the reference charging circuit recommend-
ed in
, the charger has to meet the following requirements:
Output voltage:
up to 7.0V (stabilized voltage)
Output current:
500 mA.
Chargers with a higher output current are acceptable, but please consider
that only 500mA will be applied when a 0.3Ohms shunt resistor is con-
nected between VSENSE and ISENSE. See
for further details.
Table 10:
Specifications of battery packs suitable for use with
EGS5
Battery type
Rechargeable Lithium Ion or Lithium Polymer battery
Nominal voltage
3.6V / 3.7V
Capacity
> 500mAh
NTC
10k
± 5% @ 25°C
approx. 5k
@ 45°C
approx. 26.2k
@ 0°C
B value range: B (25/85)=3423K to B =3435K ± 3%
Overcharge detection voltage
4.325 ± 0.025V
Overdischarge detection voltage
2.4V
Overdischarge release voltage
2.6V
Overcurrent detection
3 ± 0.5A
Overcurrent detection delay time
4 ~ 16ms
Short detection delay time
50µs
Internal resistance
<130m
Note: A maximum internal resistance of 150m
should not
be exceeded even after 500 cycles and under extreme con-
ditions.
