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| 型号： | MAX8934EETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/32页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY CHARGER DUAL 28WQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 系列： | Smart Power Selector™ |
| 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： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（4x4） |
| 包装： | 管件 |
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MAX8934A–MAX8934E
Dual-Input Linear Chargers, Smart Power Selector
with Advanced Battery Temperature Monitoring
Table 2b. Input Limiter Control Logic (MAX8934D)
FEATURE
Absolute Maximum Rating
Input Current Limit
DC INPUT
16V
Set by R PSET , PEN1, PEN2, and
USUS;
2A (max)
USB INPUT
9V
Set by R PSET , PEN1,
PEN2, and USUS;
1.5A (max)
NOTES
—
PSET sets the same input
current limit for DC and USB
paths.
POWER
SOURCE
AC Adapter
at DC
USB Power
at DC
DOK
L
L
L
L
UOK
X
X
X
X
PEN1
H
H
L
L
PEN2
X
X
H
L
USUS
X
X
L
L
DC INPUT
CURRENT
LIMIT
3000V/R PSET
3000V/R PSET
475mA
95mA
USB INPUT
CURRENT
LIMIT
USB Input
Off; DC input
has priority
MAXIMUM
CHARGE
CURRENT
3000V/R ISET
3000V/R ISET
475mA
95mA
L
H
X
L
L
H
X
H
H
L
USB suspend
3000V/R PSET
0
3000V/R ISET
USB Power
at USB;
DC Open
DC and
USB Open
H
H
H
H
H
L
L
L
L
H
H
L
L
X
X
L
H
L
X
X
L
L
L
H
X
No DC input
600V/R PSET
475mA
95mA
USB suspend
No USB input
3000V/R ISET
475mA
95mA
0
0
wire-ORed together. The combined output then pulls low
if either USB or DC is valid.
Soft-Start
To prevent input transients that can cause instability in
the USB or AC adapter power source, the rate of change
of input current and charge current is limited. When a
valid DC or USB input is connected, the input current
limit is ramped from zero to the set current-limit value
(as shown in Tables 2a and 2b). If DC is connected with
no USB power present, input current ramps in 1.5ms. If
DC is connected with USB already present, input current
ramps in 50 F s. When USB is connected with no DC pres-
ent, input current also ramps in 50 F s. If USB is connect-
ed with DC already present, the USB input is ignored.
If an adapter is plugged into DC while USB is already
powered, the input current limit reramps from zero back
up to the DC current limit so that the AC adapter does
not see a load step. During this transition, if the input
current limit is below the SYS load current, the battery
supplies the additional current needed to support the
load. Additionally, capacitance can be added to SYS to
22
support the load during input power transitions. When
the charger is turned on, charge current ramps from
zero to the ISET current value in typically 1.5ms. Charge
current also ramps when transitioning to fast-charge
from prequal and when changing the USB charge cur-
rent from 100mA to 500mA with PEN2. There is no dI/dt
limiting, however, if ISET is changed suddenly using a
switch at R ISET .
Battery Charger
The battery charger state diagram is illustrated in Figure
8. With a valid DC 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 BATT prequal threshold (3.0V), the charger
enters prequal mode and charges the battery at 10% of
the maximum fast-charge current. This reduced charge
rate ensures that the maximum fast-charge current set-
ting does not damage a deeply discharged battery.
Once the battery voltage rises to 3.0V, the charger tran-
sitions to fast-charge mode and applies the maximum
charge current. As charging continues, the battery volt-
age rises until it approaches the battery regulation volt-
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8934EETI+ | 功能描述:电池管理 Dual Linear Charger Smart Power Selector 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 |
| MAX8934EETI+ | 制造商:Maxim Integrated Products 功能描述:IC BATTERY CHARGER DUAL 28TQFN 制造商:Maxim Integrated Products 功能描述:IC, BATTERY CHARGER, DUAL, 28TQFN |
| MAX8934EETI+T | 功能描述:电池管理 Dual Linear Charger Smart Power Selector 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 |
| MAX8934GETI+ | 功能描述:电池管理 Dual Linear Charger Smart Power Selector 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 |
| MAX8934GETI+CAK | 功能描述:电池管理 Dual Input Linear Chargers Smart Power Selector 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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