參數(shù)資料
型號(hào)： MAX1773A
廠商： Maxim Integrated Products, Inc.
英文描述： Power Source Selector for Dual-Battery Systems
中文描述： 電源選擇器，用于雙電池系統(tǒng)
文件頁(yè)數(shù)： 13/20頁(yè)
文件大?。?/td> 397K
代理商： MAX1773A
______________________________________________________________________________________
13
M
Power Source Selector for
Dual-Battery Systems
SYSTEM
STEP-DOWN
CHARGER
CHGB
CHGA
R12
R14
COMA
DISA
COMB
DISB
PDS
V
BATB+
V
BATA+
EXTLD
POWER CONNECTIONS
AC-ADAPTER
SUPPLY
Figure 9. 7-MOSFET Topology
The Battery Switchover Latch stops the MAX1773/
MAX1773A from oscillating when the device switches
from the selected battery and then the selected bat-
tery
’
s voltage recovers. According to the state table,
the MAX1773/MAX1773A would switch back to the
selected battery as soon as the battery
’
s voltage
recovered. The Battery Switchover Latch suspends the
state table as soon as the MAX1773/MAX1773A switch
over to the nonselected battery. This causes the
MAX1773/MAX1773A to continue to power from the
nonselected battery unless the latch is cleared. The
Battery Switchover Latch is cleared when BATSEL is
toggled (to select the other battery), when in the
Startup States mode, in the AC Adapter States mode,
and when the selected battery is removed (V
THM_
>
V
TCOMP
).
To prevent the MAX1773/MAX1773A from switching to a
discharged battery, the Low-Battery Latch suspends the
state table when the unconnected battery
’
s voltage is
below 5
V
MINV
and the discharging battery
’
s voltage
drops below 5
V
MINV
. Instead of switching to the
unconnected battery, the MAX1773/MAX1773A continue
to power from the discharging battery. This latch is
cleared when the unconnected battery is removed
(V
THM_
> V
TCOMP
), when in the Startup States mode,
when in the AC Adapter States mode, and if the uncon-
nected battery
’
s voltage rises above 5
V
MINV
.
The Discharged Battery Latch sets whenever the
MAX1773/MAX1773A are in the Standard Battery States
mode, both batteries are present (V
THM_
< V
TCOMP
),
one of the batteries is low (V
BAT_
< 5
V
MINV
), and the
other battery
’
s voltage is below V
ACDET
. While the
VBATA
>5
×
V
MINV
<5
×
V
MINV
X
X
<5
×
V
MINV
<5
×
V
MINV
X
VBATB
X
>5
×
V
MINV
>5
×
V
MINV
X
<5
×
V
MINV
X
<5
×
V
MINV
BATTERY A
Present
Present
Absent
Absent
X
X
Absent
BATTERY B
X
Present
Present
Absent
X
Absent
X
CONNECTION STATE
Battery A is connected to the load.
Battery B is connected to the load.
Battery B is connected to the load.
No connections.
No connections.
No connections.
No connections.
Table 3. Startup States
X = Don
’
t care, Present: V
THM_
< V
TCOMP
, Absent: V
THM_
> V
TCOMP
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1773AEUP 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX1773AEUP+ 功能描述:電池管理 Power Source Selector for Dual-Battery Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX1773AEUP+T 功能描述:電池管理 Power Source Selector for Dual-Battery Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX1773EUP 制造商:Maxim Integrated Products 功能描述:20 PINS TSSOP PKG - Bulk
MAX1773EUP+ 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
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