MAX1667 Datasheet, PDF (8/28 Pages) Maxim Integrated Products – Chemistry-Independent, Level 2 Smart Battery Charger

Chemistry-Independent,
Level 2 Smart Battery Charger
Typical Operating Characteristics (continued)
(Circuit of Figure 7, T_A = +25°C, unless otherwise noted.)
V_REF vs. TEMPERATURE
4.110
4.105
4.100
4.095
4.090
4.085
V_DCIN = 20V
4.080
-40 -20 0 20 40 60
TEMPERATURE (°C)
80 100
100
95
90
85
80
75
70
65
60
55
50
0
EFFICIENCY vs. LOAD CURRENT
(VOLTAGE REGULATION)
AB
DE
C
A: V_DCIN = 20V, V_BATT = 17V
B: V_DCIN = 16V, V_BATT = 12.75V
C: V_DCIN = 20V, V_BATT = 12.75V
D: V_DCIN = 16V, V_BATT = 8.5V
E: V_DCIN = 20V, V_BATT = 8.5V
1000
2000
3000
4000
LOAD CURRENT (mA)
100
95
90
85
80
75
70
65
60
55
50
0
EFFICIENCY vs. BATT VOLTAGE
(CURRENT REGULATION)
A
C
B
A: V_DCIN = 16V, I_LOAD = 2A
B: V_DCIN = 20V, I_LOAD = 2A
C: V_DCIN = 20V, I_LOAD = 600mA
2 4 6 8 10 12 14 16 18
BATT VOLTAGE (V)
OUTPUT V-I CHARACTERISTIC
(SWITCHING REGULATOR)
0.001
0.01
0.1
1.0
V_DCIN = 20V
10 ChargingVoltage() = 17,408mV
ChargingCurrent() = 1920mA
V_REF = 4.096V
100 ₀
400 800
1200 1600 2000
LOAD CURRENT (mA)
OUTPUT V-I CHARACTERISTIC
(LINEAR SOURCE)
8
7
6
5
4
3
2
V_DCIN = 20V
1 ChargingVoltage() = 17,408mV
ChargingCurrent() = 1 to 127mA
0 _{0 2 4 6 8 10 12 14 16 18 20}
V_IOUT (V)
BATT VOLTAGE ERROR
vs. ChargingVoltage() CODE
1.0
0.8 V_DCIN = 20V
0.6
MEASURED AT AVAILABLE
ChargingVoltage() CODES
0.4
0.2
I_LOAD = 3mA
0
-0.2
I_LOAD = 600mA
-0.4
-0.6
-0.8
-1.0
0 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k
ChargingVoltage() CODE
LOAD CURRENT ERROR
15
V_DCIN =20V
V_BATT = 12.75V
MEASURED AT AVAILABLE
10
ChargingCurrent() CODES
5
0
-5
0 500 1000 1500 2000 2500 3000 3500 4000
CODE
8 _______________________________________________________________________________________