User's Manual

AC65/AC75 Hardware Interface Description

Confidential / Preliminary

AC65/AC75_hd_v00.372 Page 45 of 118 2006-08-03

Table 8: Specifications of battery packs suitable for use with AC65/AC75

Battery type Rechargeable Lithium Ion or Lithium Polymer battery

Nominal voltage 3.6V / 3.7V

Capacity Recommended: 1000mAh to 1200mAh

Minimum: 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 2.5V

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

conditions.

3.5.4 Charger Requirements

For using the implemented charging algorithm and the reference charging circuit

recommended in [4] and in Figure 46, the charger has to meet the following requirements:

Output voltage: 5.2Volts ±0.2V (stabilized voltage)

Output current: 500mA

Chargers with a higher output current are acceptable, but please

consider that only 500mA will be applied when a 0.3Ohms shunt

resistor is connected between VSENSE and ISENSE. See [4] for

further details.