User's Manual

BM90SPKA5MG7

Version: 1.01 - 15 - 6/26/2014

Battery Charger

Charging Mode (BAT_IN rising to 4.2V) Min Typ Max Unit

Operation Temperature -10 55 ℃

Input Voltage (Vin)

Note: It needs more time to get battery fully

charged when Vin=4.5V

4.5 7 V

Battery trickle charge current

(BAT_IN < trickle charge voltage threshold)

0.1C mA

Trickle charge voltage threshold 3 V

Maximum battery

charge current

Headroom > 0.7V 350 mA

Headroom = 0.3V 150 mA

Minimum battery

charge current

Headroom > 0.7V 1 mA

Headroom = 0.3V 1 mA

Battery charge termination current,

% of fast charge current

Battery recharge hysteresis (Note1) 100 mV

Battery recharge current (Note2)

Note: C  Battery capacity

0.25C mA

Note1：When charging complete and the adapter is still in, the battery voltage will slowly drop down.

When the voltage drop is larger than 100mV from the full voltage, the re-charging cycle will

start.

Note2：If the battery voltage during plug in is larger than 4V, the charging current will be limited to

0.25C to avoid the battery voltage overshoot.