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参数资料
| 型号： | MAX1538ETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/22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
Airline Mode and AC Adapter
The MAX1538 provides compatibility with airline
adapters. For airplane safety, the use of an airline
adapter requires that the battery charger or charge
path is disabled. The MAX1538 disables the charge
path when an airline adapter is detected. In airline
mode, ADPPWR and REVBLK drive P1 and P2 on, and
all other MOSFETs are off, regardless of the state of
RELRN, CHG, BATSEL, or the batteries. If the AC
threshold is above the airline threshold, select a resis-
tive voltage-divider (as shown in Figure 1) according to
the following equations:
the adapter voltage is between V AC_Threshold and
V AIR_Threshold .
To minimize error, use 1% accuracy or better divider
resistors, and ensure that the impedance of the divider
results in a current about 100 times the ACDET and
AIRDET input bias current. To optimize error due to 1μA
input bias current at ACDET/AIRDET and minimize cur-
rent consumption, typically choose R3 less than 20k ? .
See the Adapter Removal Debouncing section for more
information regarding R1, R2, and R3. Short R2 to dis-
able airline-adapter mode.
Optionally, an external circuit can be implemented to
V AC _ Threshold = V ACDET _ Threshold ×
V Air _ Threshold = V AIRDET _ Threshold ×
R 1 + R 2 + R 3
R 3
R 1 + R 2 + R 3
R 2 + R 3
determine the presence of an AC/airline adapter. The
circuit in Figure 5 provides fast detection of an airline
adapter, yet allows external circuitry to discriminate
between airline and AC adapters. If V AC_Threshold <
V AIR_Threshold , this circuit must be used for airline-
adapter detection. Other permutations that directly
drive AIRDET instead do not work properly on the
where V ACDET_Threshold and V AIRDET_Threshold are typ-
ically 2.0V (see the Electrical Characteristics ). An AC
adapter is detected when the adapter voltage is above
V AC_Threshold , and an airline adapter is detected when
MAX1538 because adapter removal is not detected
fast enough, causing the system load to crash.
OUT[2:0] = 011 if the MAX1538 is in airline-adapter
mode. If RELRN = 0 and CHG = 0, only OUT[1:0] are
necessary to indicate airline-adapter mode.
ADAPTER INSERTION
EXTERNAL AC/AIRLINE
ADAPTER
DETECTION CIRCUIT
R1
R2 + R3
OUT
ACDET MUST WAIT
ADPIN
AIRDET
ACDET
FOR AC ADAPTER
FOR AIRLINE ADAPTER
P1
P2
ADPIN
ADPPWR
REVBLK
EXTLD
MAX1538
ADAPTER REMOVAL
ACDET MAY OCCUR
BEFORE OR AFTER ADPIN
ACDET
ADPIN
FOR AC ADAPTER
FOR AIRLINE ADAPTER
ACDET
Figure 5. Using an External Adapter Detection Circuit
16
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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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