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参数资料
| 型号： | MAX8671XETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 26/44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
USB Power-OK Output ( UOK )
As shown Figure 3, the USB power-OK output ( UOK ) is
an active-low open-drain output. The UOK output pulls
low when the voltage from USB to AGND (V USB ) is
between V USBH (typically 6.9V) and V USBL (typically
4.0V).
The USB power-OK circuitry remains active in thermal
overload and USB suspend. If the USB power-OK out-
put feature is not required, connect UOK to ground or
leave unconnected.
USB Suspend (USUS)
As shown in Table 1, driving USUS high suspends the
DC or USB inputs if they are configured as a USB
power input. The suspend current is 110μA when USUS
is driven high allowing the MAX8671X to comply with
the USB 1.1/2.0 specification for USB suspend as well
as the USB OTG specification for an unconfigured
device. If an external input (USB or DC) is connected to
the MAX8671X and suspended, the SYS node is sup-
ported by the battery. The DOK, UOK, and VL circuits
remain active in USB suspend mode.
A common assumption is that REG5 is disabled in USB
suspend. This is not true. REG5 is not affected by the
USB suspend mode. While in suspend, a USB device
must provide the 3.3V termination to the USB trans-
ceivers ’ pullup resistors. This 3.3V termination can
come from the MAX8671X’s VL output or REG5. Both
remain enabled in USB suspend.
DC Power Input (DC)
DC is a current-limited power input that supplies the
system (SYS) up to 1A. The DC-to-SYS switch is a lin-
ear regulator designed to operate in dropout. This lin-
ear regulator prevents the SYS voltage from exceeding
5.3V. As shown in Table 1, DC supports four different
current limits that are set with the PEN1, PEN2, and
USUS digital inputs. These current limits are ideally
suited for use with AC-to-DC wall adapters and USB
power. The operating voltage range for DC is 4.1V to
6.6V, but it can tolerate up to 14V without damage.
When the DC input voltage is below the undervoltage
threshold (V DCL , 4V typ), it is considered invalid.
Similarly, if the DC voltage is above the overvoltage
threshold (V DCH , 6.9V typ), it is considered invalid.
When the DC voltage is below the battery voltage, it is
considered invalid. The DC power input is disconnect-
ed when the DC voltage is invalid. As shown in Table 1,
when power is available at the DC input, it has priority
over the USB input. Bypass DC to ground with at least
a 4.7μF capacitor.
USB
MAX8671X
Figure 3. USB Power-OK Logic
V USBL
4.0V RISING (typ)
500mV HYST
V USBH
6.9V RISING (typ)
400mV HYST
USB
UNDERVOLTAGE
USB
OVERVOLTAGE
AGND
UOK
26
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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