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参数资料
| 型号： | MAX8844ZETD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/17页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER LI+ DUAL 14TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 0 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | MAX8844ZETD+TDKR |
28V Dual Input Linear Li+ Battery Chargers with
Battery Detection and Overvoltage-Protected Output
Pin Description
PIN
MAX8844Z MAX8844Y
NAME
FUNCTION
Input Supply Voltage. IN is the power supply for the SAFEOUT linear regulator and the
1
1
IN
battery charger. See the DC and USB Power Supplies section. Bypass IN to GND with a
1μF or larger ceramic capacitor to improve line noise and input transient rejection.
Active-Low, Input Voltage Status Indicator. POK is an open-drain output that asserts low
when 2.35V < (V IN or V USB ) < 7V and [(V IN or V USB ) - V BATT ] > 40mV. If (V IN or V USB ) >
2
2
POK
+7.5V or V BATT > (V IN or V USB ), the IC is shut down and POK becomes high impedance.
Connect a pullup resistor to the microprocessor’s I/O voltage when interfacing with a
microprocessor logic input.
USB Input Supply Voltage. USB is the power supply for the SAFEUSB linear regulator
3
3
USB
and the battery charger. See the DC and USB Power Supplies section. Bypass USB to
GND with a 1μF or larger ceramic capacitor to improve line noise and input transient
rejection.
4
5
—
6
4
—
5
6
ABI
ABO
ABO
MIN
Autobooting External Input. See the Autobooting Assistant section and Table 1 for
autobooting conditions. ABI is pulled to GND through an internal 200k Ω resistor.
Active-High, Autobooting Logic Output. See the Autobooting Assistant section and Table
1 for autobooting conditions.
Active-Low, Autobooting Logic Output. See the Autobooting Assistant section and Table
1 for autobooting conditions.
Top-Off Current Threshold Programmable Input. I MIN (mA) falling = 126V/R MIN (k Ω ) + 27
(mA).
Charge-Current Program and Fast-Charge Current Monitor. Output current from SETI is
7
7
SETI
1120μA per ampere of battery charging current. Set the charging current by connecting
a resistor (R SETI in Figure 3) from SETI to GND. I FAST-CHARGE = 1250V/R SETI . To
configure the MAX8844Z/MAX8844Y as a USB charger, see Figure 5.
Battery Pack ID Resistor Detection Input. If DETBAT is pulled low through a pulldown
8
8
DETBAT
resistor less than 51k Ω , the charger is enabled. If DETBAT is left unconnected, the
charger is disabled.
Active-Low, Charging Indicator. CHG is an open-drain output that is pulled low once
9
9
CHG
charging begins. CHG is high impedance when the battery current drops below MIN, or
when the IC is disabled. Connect a pullup resistor to the microprocessor’s I/O voltage
when interfacing with a microprocessor logic input.
10
11
12
10
11
12
EN
GND
BATT
Active-Low, Logic-Level Enable Input. Drive EN high to disable charger. Drive EN low or
leave unconnected for normal operation. EN has an internal 200k Ω pulldown resistor.
Ground. Connect GND and the exposed pad to a large copper ground plane for
maximum power dissipation. Connect GND to the exposed pad directly under the IC.
Li+ Battery Connection. Bypass BATT to GND with a 2.2μF ceramic capacitor.
4.7V Regulated LDO Output with Input Overvoltage Protection. Bypass SAFEUSB to
13
13
SAFEUSB
GND with a 1μF or larger ceramic capacitor. SAFEUSB can be used to supply low-
voltage-rated USB systems.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8844ZEVKIT+ | 功能描述:电源管理IC开发工具 MAX8844Y/Z Eval Kit 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 |
| MAX8845WETC+ | 功能描述:电池管理 28V Linear Li+ Battery Charger 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 |
| MAX8845WETC+T | 功能描述:电池管理 28V Linear Li+ Battery Charger 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 |
| MAX8845XETC+ | 功能描述:电池管理 28V Linear Li+ Battery Charger 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 |
| MAX8845XETC+T | 功能描述:电池管理 28V Linear Li+ Battery Charger 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 |
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