MAX1535A Datasheet, PDF (10/39 Pages) Maxim Integrated Products – Highly Integrated Level 2 SMBus Battery Charger

Highly Integrated Level 2 SMBus
Battery Charger
Typical Operating Characteristics
(Circuit of Figure 1, V_DCIN = 20V, T_A = +25°C, unless otherwise noted.)
TRANSIENT RESPONSE
(BATTERY REMOVAL AND INSERTION)
MAX1535 toc01
LOAD SWITCH CONTROL
(ADAPTER INSERTION)
MAX1535 toc02
SYSTEM LOAD TRANSIENT
MAX1535 toc03
16.8VDC
A
A
0V
B
C
B
C
0V
C
C
B
B
0V
0V
BATT INSERTED
D
D
BATT REMOVED
0V
0V
4ms/div
A: BATTERY VOLTAGE, 500mV/div, AC-COUPLED
B: V_CCV, 500mV/div
C: V_CCI, 500mV/div
D: CHARGE CURRENT, 2A/div
200µs/div
A: ADAPTER INPUT VOLTAGE, 20V/div
B: V_CSSN, 20V/div
C: V_PDS, 20V/div
D: V_PDL, 20V/div
A
B
B _0V
C
C
C
B
D
0V
E
0V
F
400µs/div
A: V_BATT, 500mV/div, AC-COUPLED
B: V_CCS, 500mV/div
C: V_CCI, 500mV/div
D: AC ADAPTER CURRENT, 5A/div
E: SYSTEM LOAD, 5A/div
F: CHARGE CURRENT, 5A/div
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
LDO LOAD REGULATION
(V_IN = 20V)
LDO LINE REGULATION
0.010
0.008
0.006
0.004
0.002
0
-0.002
-0.004
-0.006
-0.008
2
4
6
8
LDO CURRENT (mA)
-0.010
10
8
12
16
20
24
28
INPUT VOLTAGE (V)
REF LOAD REGULATION
0
-0.02
-0.04
-0.06
-0.08
-0.10
0
100 200 300 400 500
REF LOAD CURRENT (µA)
REF VOLTAGE ERROR vs. TEMPERATURE
0.02
EFFICIENCY vs. CHARGE CURRENT
(CONSTANT-VOLTAGE MODE)
100
0
90
-0.02
80
V_CHARGE = 8.4V
-0.04
70
V_CHARGE = 12.6V
V_CHARGE = 16.8V
-0.06
60
-0.08
50
-0.10
-40 -20 0 20 40 60 80 100
40
0
2
4
6
8
TEMPERATURE (°C)
CHARGE CURRENT (A)
10 ______________________________________________________________________________________