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参数资料
| 型号： | MAX8671XETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/44页 |
| 文件大小： | 0K |
| 描述： | IC PMIC W/CHARGER 40-TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 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： | 4.1 V ~ 6.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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PMIC with Integrated Charger and
Smart Power Selector for Handheld Devices
Pin Description (continued)
PIN
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
—
NAME
LX1
PG1
PG3
LX3
PV3
VL
FB3
DISET
CISET
CT
THM
BAT
SYS
PEN1
CST2
UOK
CST1
PEN2
EP
FUNCTION
Inductor Switching Node for REG1. LX1 is internally pulled to PG1 by 1k Ω in shutdown.
Power Ground for the REG1 Step-Down Regulator
Power Ground for the REG3 Step-Down Regulator
Inductor Switching Node for REG3. LX3 is internally pulled to PG3 by 1k Ω in shutdown.
Power Input for the REG3 Step-Down Regulator. Connect PV3 to SYS. Bypass PV3 to PG3 with a
4.7μF ceramic capacitor.
IC Supply Output. VL is an LDO output that powers the MAX8671X internal battery-charger circuitry.
VL provides 3.3V at 3mA to power external circuitry when DC or USB is present. Connect a 0.1μF
capacitor from VL to AGND.
Feedback Input for REG3. Connect FB3 to the center of a resistor voltage-divider from the REG3
output capacitors to AGND to set the output voltage from 1V to V SYS .
DC Input Current-Limit Select Input. Connect a resistor from DISET to AGND (R DISET ) to set the DC
current limit. See Table 2 for more information.
Charge Rate Select Input. Connect a resistor from CISET to AGND (R CISET ) to set the fast-charge
current limit, prequalification-charge current limit, and top-off threshold.
Charge Timer Programming Node. Connect a capacitor from CT to AGND (C CT ) to set the time
required for a fault to occur in fast-charge or prequalification modes. Connect CT to AGND to disable
the fast-charge and prequalification timers.
Thermistor Input. Connect a negative temperature coefficient (NTC) thermistor that has a good
thermal contact with the battery from THM to AGND. Connect a resistor equal to the thermistor
resistance at +25°C from THM to VL. Charging is suspended when the battery is outside the hot or
cold limits.
Positive Battery Terminal Connection. Connect BAT to the positive terminal of a single-cell Li+/Li-Poly
battery.
System Supply Output. Bypass SYS to power ground with a 10μF ceramic capacitor.
When a valid voltage is present at USB or DC and not suspended (USUS = low), SYS is limited to
5.3V (V SYS-REG ). When the system load (I SYS ) exceeds the input current limit, SYS drops below V BAT
by V BSREG allowing both the external power source and the battery service SYS.
SYS is connected to BAT through an internal system load switch (R BS ) when a valid source is not
present at USB or DC.
Input Current-Limit Control 1. See Table 1 for more information.
Open-Drain Charger Status Output 2. CST1 and CST2 indicate four different charger states. See
Table 3 for more information.
Active-Low, Open-Drain USB Power-OK Output. UOK is low when V USB is within its valid operating
range.
Open-Drain Charger Status Output 1. CST1 and CST2 indicate four different charger states. See
Table 3 for more information.
Input Current-Limit Control 2. See Table 1 for more information.
Exposed Paddle. Connect the exposed paddle to AGND. Connecting the exposed paddle does not
remove the requirement for proper ground connections to AGND, PG1, PG2, and PG3.
______________________________________________________________________________________
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