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参数资料
| 型号： | MAX8671XETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 28/44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
DC
MAX8671X
Figure 5. DC Power-OK Logic
V DCL
4.0V RISING (TYP)
500mV HYST
V DCH
6.9V RISING (TYP)
400mV HYST
USB
UNDERVOLTAGE
USB
OVERVOLTAGE
AGND
DOK
Battery Charger
Figure 6 shows the typical Li+/Li-Poly charge profile for
the MAX8671X, and Figure 7 shows the battery charger
state diagram.
With a valid DC and/or USB input, the battery charger
initiates a charge cycle when the charger is enabled. It
first detects the battery voltage. If the battery voltage is
less than the prequalification threshold (3.0V), the
charger enters prequalification mode in which the bat-
tery charges at 10% of the maximum fast-charge cur-
rent while deeply discharged. Once the battery voltage
rises to 3.0V, the charger transitions to fast-charge
mode and applies the maximum charge current. As
charging continues, the battery voltage rises until it
approaches the battery regulation voltage (selected
with BVSET) where charge current starts tapering
down. When charge current decreases to 4% of the
maximum fast-charge current, the charger enters a
brief 15s top-off state and then charging stops. If the
battery voltage subsequently drops below the battery
regulation voltage by V BATRCHG , charging restarts and
the timers reset.
The battery charge rate is set by several factors:
? Battery voltage
? USB/DC input current limit
? Charge setting resistor, R CISET
? System load (I SYS )
? Die temperature
The MAX8671X automatically reduces charge current
to prevent input overload. MAX8671X also reduces
charge current when in thermal regulation (see the
Thermal Limiting and Overload Protection section for
more information).
Battery Regulation Voltage (BVSET)
BVSET allows the maximum battery charge voltage to
be set to 4.1V, 4.2V, or 4.350V. Drive BVSET low to set
the regulation voltage to 4.1V. Connect BVSET to VL or
leave unconnected to set the regulation voltage to 4.2V.
Connect BVSET to AGND through a 45k Ω to 55k Ω
resistor (R BVSET ) to set the regulation voltage to
4.350V. R BVSET accuracy is not critical. A 51k Ω ±5%
resistor is acceptable.
Charge Enable Input ( CEN )
CEN is a digital input. Driving CEN high disables the
battery charger. CEN does not affect the USB or DC
current limit. Driving USUS high also disables the bat-
tery charger when charging from a USB source (PEN1
= low).
In many systems, there is no need for the system
controller (typically a microprocessor (μP)) to disable
the charger because the MAX8671X independently
manages the charger power path. In these situations,
CEN can be connected to ground. Do not leave
CEN unconnected.
28
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相关代理商/技术参数 |
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|---|---|
| MAX8672ETD+T | 功能描述:电池管理 Backup Management IC for NiMH Batteries 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 |
| MAX8672EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX8672 EVAL KIT - Rail/Tube |
| MAX8674EVKIT+ | 制造商:Maxim Integrated Products 功能描述:STANDARD PRODUCTS - Boxed Product (Development Kits) |
| MAX8676ELB+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8676EWJ+T | 制造商:Maxim from Components Direct 功能描述:THE MAXIM MAX8676EWJ+T IS A USB HOT SWAP CONTROLLER. - Tape and Reel 制造商:Maxim 功能描述:The Maxim MAX8676EWJ+T is a USB Hot Swap Controller. |
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