MAX1647 Datasheet, PDF (6/24 Pages) Maxim Integrated Products – Chemistry-Independent Battery Chargers

Chemistry-Independent
Battery Chargers
__________________________________________Typical Operating Characteristics
(Circuit of Figure 3, T_A = +25°C, unless otherwise noted.)
MAX1647
BATT LOAD TRANSIENT
MAX1647/48-01
CCI
CCV
CCI
V_CCI
2.4V _VCCV
200mV/div
CCV
12V
V_BATT
1V/div
MAX1647
BATT LOAD TRANSIENT
MAX1647/48-02
1.1A TO 0.9A TO 1.1A
CCI
CCV
CCV
CCV
V_CCV
2.3V _VCCI
100mV/div
CCI
CCI
12V
V_BATT
5V/div
0.9A TO 1.9A TO 0.9A
1ms/div
ChargingVoltage( ) = 0x2EE0 = 12000mV
ChargingCurrent( ) = 0xFFFF = MAX VALUE
ACDCIN = 18.0V, SEL = OPEN, R1 = 0.1Ω
R2 = 10kΩ, C1 = 68µF, C2 = 0.1µF, C3 = 47nF
L1 = 22µH, V_REF = 4.096V
2ms/div
ChargingVoltage( ) = 0x2EE0 = 12000mV
ChargingCurrent( ) = 0x03E8 = 1000mA
ACDCIN = 18.0V, SEL = OPEN, C1 = 68µF,
C2 = 0.1µF, C3 = 47nF, R1 = 0.1Ω
R2 = 10kΩ, L1 = 22µH, V_REF = 4.096V
VL VOLTAGE vs. LOAD CURRENT
5.5
INTERNAL REFERENCE VOLTAGE
3.86
3.84
5.0
3.82
4.5
3.80
3.78
4.0
3.76
3.5
CIRCUIT OF FIGURE 3
V_DCIN = 6.6V
0
0
10
20 30
40
LOAD CURRENT (mA)
INPUT AND OUTPUT POWER
40
V_DCIN = 28V
35 ^VBATT ^{= 12.6V}
ChargingCurrent( ) = 0xFFFF
30 ^{ChargingVoltage( ) = 0xFFFF}
25
0.001
0.01
0.1
3.74
3.72
3.70
50
0
MAX1647
OUTPUT V-I CHARACTERISTIC
BATT NO-LOAD
OUTPUT VOLTAGE = 16.384V
0.5
1.0
1.5
2.0
LOAD CURRENT (mA)
OUTPUT VOLTAGE ERROR
0.8
0.6
3mA LOAD
0.4
20
15
10
5
0
0
POWER INTO
CIRCUIT
POWER TO BATT
500 1000 1500 2000 2500
CURRENT INTO BATT (mA)
1
10
V_DCIN = 28V, V_REF = 4.096V
ChargingVoltage( ) = 0xFFFF
ChargingCurrent( ) = 0xFFFF
100
0
500 1000 1500 2000
LOAD CURRENT (mA)
2500
0.2
0
300mA LOAD
-0.2
-0.4
4500
8500
12,500
16,500
PROGRAMMED VOLTAGE CODE IN DECIMAL
6 _______________________________________________________________________________________