MC34673 Datasheet, PDF (8/22 Pages) Freescale Semiconductor, Inc – High Input Voltage 1.2A Charger for Single-cell Li-Ion Batteries

ELECTRICAL CHARACTERISTICS
ELECTRICAL PERFORMANCE CURVES
ELECTRICAL PERFORMANCE CURVES
5.0
350
4.5
Battery Voltage 300
4.0
250
3.5
200
3.0
150
2.5
100
Charge Current
2.0
50
1.5
0
0 20 40 60 80 100 120
Charge Time ( min)
Figure 4. Complete Charge Cycle
V_IN = 5.0V, I_CHG=300mA, T_A = 25°C
4.4
4.2
4.0
3.8
3.6
4.0 4.5 5.0 5.5 6.0 6.5
V_IN (V)
Figure 5. V_BAT vs V_IN
I_BAT = 0mA, T_A = 25°C
3000
2500
2000
1500
1000
Charger Enabled
500
Charger Disabled
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
V_IN (V)
Figure 6. VIN Pin Supply Current vs V_IN
I_BAT=0mA, T_A = 25°C
34673
8
1500
R =3.23 kΩ
ISET
1200
900
R =6.57 kΩ
600 ^ISET
R =13.3 kΩ
300 ^ISET
3.5 4.0 4.5 5.0 5.5 6.0 6.5
V_IN (V)
Figure 7. Constant Charge Current vs V_IN
V_BAT = 3.0V, T_A = 25°C
250
200
R =3.23 kΩ
ISET
150
100
50
R =6.57 kΩ
ISET
R =13.3 kΩ
ISET
0
3.5 4.0 4.5 5.0 5.5 6.0 6.5
V_IN (V)
Figure 8. Trickle Charge Current vs V_IN
V_BAT = 2.0V, T_A = 25°C
1.2
1.0
0.8
0.6
0.4
0.2
0.0
4.4 4.8 5.2 5.6 6.0 6.4 6.8
V_IN (V)
Figure 9. V_ISET vs V_IN
V_BAT = 3.9V, T_A = 25°C
Analog Integrated Circuit Device Data
Freescale Semiconductor