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參數(shù)資料
| 型號： | MAX1538ETI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Power-Source Selector for Dual-Battery Systems |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC28 |
| 封裝： | 5 X 5 MM, 0.80 MM HEIGHT, MO-220WHHD-1, TQFN-28 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大?。?/td> | 502K |
| 代理商： | MAX1538ETI |
Power-Source Selector for
Dual-Battery Systems
14
______________________________________________________________________________________
Detailed Description
The MAX1538 performs power path selection between
an adapter input and two batteries, relieving the host
system from the burden of real-time response to power-
source changes. The integrated selector implements a
fixed break-before-make timer to ensure that power
sources are not connected together and yet the load is
not left unserviced. The MAX1538 monitors battery and
adapter state and presence to determine which source
to select and whether to charge the battery. Logic
inputs CHRG, BATSEL, and RELRN allow the host to
enable/disable charging, select which battery to use,
and impose battery discharge even with adapter pres-
ence. The MAX1538 automatically detects airline
adapters and prevents charging when an airline
adapter is detected. Open-drain logic outputs OUT2,
OUT1, and OUT0 indicate the state of the selector so
the host can properly respond.
The MAX1538 can be configured for use with a step-
down battery charger, as shown in
Figure
1, or with a
step-up/step-down battery charger, as shown in
Figure
2. The minimum MAX1538 system requires only six
MOSFETs. The MAX1538 provides relearn-mode sup-
port with the addition of P1. Relearn mode allows the
system to relearn the battery’s capacity without user
intervention.
Table
1 summarizes the possible states and configura-
tions of the MAX1538.
SOURCE STATE
LOGIC INPUTS
MOSFET STATE (See Figure 4)
Battery
Adapter
A
B
C
R
B
System
(ADPPWR
and REVBLK)
Battery
(ADPBLK
and DISBAT)
BATT A
(CHGA and
DISA)
BATT B
(CHGB and
DISB)
O
O
O
STATE
AC
AC
AC
AC
AC
X
X
N
X
X
X
X
N
1
1
X
X
0
0
1
1
0
1
0
1
On
On
Off
Off
On
Off
Off
On
On
Off
On
Off
On
Off
Off
Off
On
Off
On
Off
1
1
1
1
0
1
1
0
0
1
0
1
0
1
0
Charge A
Charge B
Relearn A
Relearn B
AC adapter
Otherwise
AIR
Absent
Absent
Absent
Absent
Absent
Legend
AC
AIR
Absent
X
N
N
X
U
U
X
X
U
N
N
U
X
X
X
X
X
X
X
X
X
X
X
X
X
0
X
1
X
X
On
Off
Off
Off
0
1
1
Airline
Off
On
On
Off
0
0
0
Discharge A
Off
On
Off
On
0
0
1
Discharge B
Off
Off
Off
Off
0
0
0
Idle
AC adapter is present. V
ACDET
and V
AIRDET
are both above 2V.
Airline adapter is present. V
ACDET
is below 2V and V
AIRDET
is above 2V.
External adapter is absent. V
ACDET
and V
AIRDET
are both below 2V.
N indicates the battery is normal. The battery is normal when it has not tripped the undervoltage latch (5 x
V
MINV_
). See the
Battery Presence and Undervoltage Detection
section.
N
U
U indicates the battery has tripped the undervoltage comparator. An undervoltage battery is detected
when V
BAT_
goes below 5 x V
MINV_
. See the
Battery Presence and Undervoltage Detection
section
.
Otherwise
X
Otherwise covers all cases not explicitly shown elsewhere in the table.
X indicates don’t care. The output does not depend on any inputs labeled X.
X
X
X
X
Table 1. MAX1538 State Table
M
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MAX1538ETI+ | 功能描述:電池管理 Power-Source Select for Dual-Bat System 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 |
| MAX1538ETI+T | 功能描述:電池管理 Power-Source Select for Dual-Bat System 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 |
| MAX1538ETI-T | 功能描述:電池管理 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 |
| MAX1538EVKIT | 功能描述:電源管理IC開發(fā)工具 MAX1538EVKIT RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX153C/D | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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