Owner manual

MAX1538
Power-Source Selector for
Dual-Battery Systems
6 _______________________________________________________________________________________
PARAMETER
SYMBOL
CONDITIONS
MIN MAX
UNITS
BAT_ Pack Removal Detection
Threshold
V
BAT_
falling
1.88 2.12
V
GATE DRIVERS (Note 1)
V
SOURCE
= 15V, V
PIN
= 7.5V 18
ADPPWR, REVBLK, ADPBLK,
DISBAT, DISA, DISB, CHGA,
CHGB Source Current (PMOS
Turn-Off)
V
SOURCE
= 15V, V
PIN
= 13V 3
mA
V
SOURCE
= 15V, V
PIN
= 15V 20
ADPPWR, REVBLK, ADPBLK,
DISBAT, DISA, DISB, CHGA,
CHGB Sink Current (PMOS
Turn-On)
V
SOURCE
= 15V, V
PIN
= 9.5V 10
mA
V
S OU RC E
= 8V to 19V ( AD P P W R, RE V BLK,
and AD P BLK, V
S OU RC E
= 8V to 28V )
-11.7 -6.5
ADPPWR, REVBLK, ADPBLK,
DISBAT, DISA, DISB, CHGA,
CHGB Turn-On Clamp Voltage
(V
PIN
to V
SOURCE
)
V
SOURCE
= 4.75V to 8V
-8.00 -3.50
V
ADPPWR, REVBLK, ADPBLK,
DISBAT, DISA, DISB, CHGA,
CHGB Turn-On Time
V
SOURCE
= 15V, V
PIN
= 13V to V
PIN
= 9V 0.88
µs
ADPPWR, REVBLK, ADPBLK,
DISBAT, DISA, DISB, CHGA,
CHGB Turn-Off Time
V
SOURCE
= 15V, V
PIN
= 9V to V
PIN
= 13V 0.88
µs
STATE SELECTION INPUTS
CHRG, BATSEL, RELRN Input
Low Voltage
0.8 V
CHRG, BATSEL, RELRN Input
High Voltage
2.1 V
STATE OUTPUTS
V
OU T _
= 0.4V
1
OUT0, OUT1, OUT2 Sink Current
V
OU T _
= 5.5V
25
mA
TRANSITION TIMES
MINV_ Comparator Delay t
MINV
V
BAT
_ = 5.5V to V
BAT
_ = 4.45V 11 µs
AIRDET and ACDET Comparator
Delay
t
ADP
Falling edge with -20mV overdrive 6 µs
Battery-Insertion Blanking Time t
BBLANK
12 31 ms
MOSFET Turn-On Delay t
TRANS
510µs
Note 1: V
PIN
refers to the voltage of the driver output. V
SOURCE
refers to the power source for the driver. ADPPWR, REVBLK, ADP-
BLK, DISBAT, DISA, DISB, CHGA, and CHGB gate drivers correspond to sources at ADPIN, EXTLD, EXTLD, CHGIN, BATA,
BATB, CHGIN, and CHGIN, respectively.
Note 2: Guaranteed by design. Not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(V
BATA
= V
BATB
= V
CHGIN
= 16.8V, C
VDD
= 1µF, V
MINVA
= V
MINVB
= 0.93V, V
EXTLD
= V
ADPIN
= 28V, V
CHRG
= V
BATSEL
= V
RELRN
= 0,
C
ADPPWR
= C
REVBLK
= C
ADPBLK
= C
DISBAT
= C
DISA
= C
DISB
= C
CHGA
= C
CHGB
= 4.7nF, T
A
= -40°C to +85°C, unless otherwise noted.)
(Note 2)