MAX1538 Datasheet, PDF (8/22 Pages) Maxim Integrated Products – Power-Source Selector for Dual-Battery Systems

Power-Source Selector for
Dual-Battery Systems
Typical Operating Characteristics (continued)
(Circuit of Figure 1. T_A = +25°C, unless otherwise noted.)
BATTERY INSERTION
MAX1538 toc06
A
10V
B
SYSTEM LOAD = 3A _{0V VBATA}
0V
V_OUT0
(10V/div)
10V V_DISB
(10V/div)
10V
V_DISA
0V
V_BATB = 16.8V
V_BATA = 10V
5.00ms/div
A: CONTACT BOUNCE
B: BATTERY INSERTION BLANKING TIME = 22ms
20V
V_EXTLD
10V
BATTERY REMOVAL TIMING
MAX1538 toc08 _10.2V
5 x MINV
V_BATA = 16.8V
BATTERY B 10V
REMOVED
V_EXTLD
t_MINV
9.8V
(t_ADP FOR
ADAPTER
t_TRANS
REMOVAL
TIMING)
9.6V
10V
V_DISB
0V
SYSTEM LOAD = 3A
4.00µs/div
10V
V_DISA
0V _VOUT0
0V ^(10V/div)
BATTERY REMOVAL
MAX1538 toc07
CONTACT BOUNCE
10V
0V ^VBATA
0V
V_OUT0
(10V/div)
V_BATA = 10V
5.00ms/div
10V V_DISB
(10V/div)
10V
V_DISA
0V
V_BATB = 16.8V
20V
V_EXTLD
10V
SOURCE SELECTION CHANGE
10V ^{MAX1538 toc09}
0V ^VBATSEL
5V _VOUT0
0V
INDUCTIVE KICK
t_TRANS
C_BATB = 1µF
SYSTEM LOAD = 3A
2.00µs/div
10V ^VDISB
(10V/div)
20V
10V
V_DISA
(10V/div)
V_BATB
AC-COUPLED
(5V/div)
SOURCE SELECTION CHANGE
10V ^{MAX1538 toc10}
0V ^VBATSEL
5V _VOUT0
0V
V_DISB
10V (10V/div)
20V
INDUCTIVE KICK
t_TRANS
NO CAPACITOR
AT BATB
10V
V_DISA
(10V/div)
V_BATB
AC-COUPLED
(5V/div)
2.00µs/div
8 _______________________________________________________________________________________