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| 型号： | MAX1538ETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/22页 |
| 文件大小： | 0K |
| 描述： | IC PWR SOURCE SELECTOR 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 功能： | 双电池控制器 |
| 电池化学： | 所有电池类型 |
| 电源电压： | 4.75 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 托盘 |
Power-Source Selector for
Dual-Battery Systems
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,
Table 1. MAX1538 State Table
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)
Adapter
Battery
A B
System
(ADPPWR
and REVBLK)
Battery
(ADPBLK
and DISBAT)
BATT A
(CHGA and
DISA)
BATT B
(CHGB and
DISB)
STATE
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
Off
Off
On
On
On
Off
On
Off
Off
On
Off
On
1
1
1
1
1
1
0
0
0
1
0
1
Charge A
Charge B
Relearn A
Relearn B
AC
Otherwise
On
Off
Off
Off
0
1
0
AC adapter
AIR
Absent
Absent
Absent
Absent
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
Off
On
On
Off
Off
On
Off
Off
Off
Off
On
Off
0
0
0
0
1
0
0
0
1
0
1
0
Airline
Discharge A
Discharge B
Idle
Legend
AC
AIR
Absent
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
U
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.
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
Otherwise covers all cases not explicitly shown elsewhere in the table.
X
X
X
X
X
X indicates don’t care. The output does not depend on any inputs labeled X.
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1538ETI+ | 功能描述:电池管理 Power-Source Select for Dual-Bat System RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1538ETI+T | 功能描述:电池管理 Power-Source Select for Dual-Bat System RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1538ETI-T | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1538EVKIT | 功能描述:电源管理IC开发工具 MAX1538EVKIT RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX153C/D | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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