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参数资料
| 型号： | MAX8845ZETC+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/19页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHRGR LI+ 28V 12TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 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： | 12-WFQFN 裸露焊盘 |
| 供应商设备封装： | 12-TQFN 裸露焊盘（3x3） |
| 包装： | 管件 |
28V Linear Li+ Battery Chargers with Battery
Detection and Overvoltage Protected Output
Pin Description
PIN
MAX8845Z
MAX8845Y/
MAX8845X/
NAME
FUNCTION
MAX8845W
Charge-Current Program and Fast-Charge Current Monitor. Output current from SETI is
1016μA per ampere of battery charging current. Set the charging current by connecting
1
1
SETI
a resistor (R SETI in Figure 3) from SETI to GND. I FAST-CHARGE = 1400V/R SETI . To
configure the MAX8845Z/MAX8845Y/MAX8845X/MAX8845W as a USB charger, see
Figure 5.
Battery Pack ID Resistor Detection Input. If DETBAT is pulled low through a pulldown
2
2
DETBAT
resistor less than 51k ? the charger is enabled. If DETBAT is left unconnected, the
charger is disabled.
3
4
5
3
4
5
ABI
EN
GND
Autobooting External Input. See the Autobooting Assistant section and Table 1 for
autobooting conditions. ABI is pulled to GND through an internal 200k ? resistor.
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 ? 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.
Active-Low, Input Voltage Status Indicator. POK is an open-drain output that asserts low
when 2.35V < V IN < 7V (7.5V for MAX8845X only) and (V IN - V BATT ) > 40mV. If V IN >
6
6
POK
+7.5V (+8.0V for MAX8845X only) or V BATT > V IN 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.
7
—
8
9
—
7
8
9
ABO
ABO
BATT
MIN
Active-High, Autobooting Logic Output. See the Autobooting Assistant section and Table
1 for autobooting conditions.
Active-Low, Open-Drain Logic Output. See the Autobooting Assistant section and Table
1 for autobooting conditions.
Li+ Battery Connection. Bypass BATT to GND with a 2.2μF ceramic capacitor.
Top-Off Current Threshold Programmable Input. I MIN (mA) falling = 148V/R MIN (k ? ) + 22
(mA).
Active-Low, Charging Indicator. CHG is an open-drain output that is pulled low once
10
10
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.
11
11
IN
Input Supply Voltage. Bypass IN to GND with a 1μF or larger ceramic capacitor to
improve line noise and input transient rejection.
4.7V (MAX8845Z/MAX8845Y/MAX8845W) or 4.85V (MAX8845X) Regulated LDO Output
12
12
SAFEOUT
with Input Overvoltage Protection. Bypass SAFEOUT to GND with a 1μF or larger
ceramic capacitor. SAFEOUT can be used to supply low voltage-rated USB systems.
—
—
EP
Exposed Pad. Connect the exposed pad to a large ground plane for maximum power
dissipation. Connect GND to the exposed pad directly under the IC.
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8845ZETC+ | 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 |
| MAX8845ZETC+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 |
| MAX8845ZEVKIT+ | 功能描述:电源管理IC开发工具 MAX8845Y/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 |
| MAX8847ZETE+ | 制造商:Maxim Integrated Products 功能描述:NEGATIVE CHARGE PUMP FOR 6 WLEDS - Rail/Tube |
| MAX8848YETE+ | 制造商:Maxim Integrated Products 功能描述:NEGATIVE CHARGE PUMP FOR 7 WLEDS - Rail/Tube |
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