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参数资料
| 型号： | MAX1508Y |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Linear Li+ Battery Charger with Integrated Pass FET. Thermal Regulation. and ACOK-bar in 3mm x 3mm TDFN |
| 中文描述： | 线性Li+电池充电器，带有集成调整FET、热调节和ACOK，3mm x 3mm TDFN封装 |
| 文件页数： | 7/11页 |
| 文件大小： | 198K |
| 代理商： | MAX1508Y |
M
Linear Li+ Battery Charger with Integrated Pass FET,
Thermal Regulation, and
ACOK
in 3mm x 3mm TDFN
_______________________________________________________________________________________
7
Applications Information
Charge-Current Selection
The maximum charging current is programmed by an
external R
ISET
resistor connected from ISET to GND.
Select the R
ISET
value based on the following formula:
I
FAST
= 1461V / R
ISET
where I
FAST
is in amps and R
ISET
is in ohms. ISET can
also be used to monitor the fast-charge current level.
The output current from the ISET pin is 0.958mA per
amp of charging current. The output voltage at ISET is
proportional to the charging current as follows:
V
ISET
= (I
CHG
x R
ISET
) / 1044
The voltage at ISET is nominally 1.4V at the selected
fast-charge current, and falls with charging current as
the cell becomes fully charged.
Thermal Regulation
The MAX1508 features a proprietary thermal-regulation
circuit to protect both the IC and the system from
excessive heat. When the MAX1508
’
s die temperature
reaches +100
°
C, the charge current is reduced to pre-
vent any additional increase in the die temperature. An
active thermal loop does not indicate a fault condition.
Thermal regulation allows the MAX1508 to provide con-
tinuous charge to the battery under adverse conditions
without causing excessive power dissipation.
SHUTDOWN
CHARGER = OFF
LED = OFF
PRECHARGE
10% CHARGE CURRENT
LED = ON
(MAX1508 ONLY)
FAST CHARGE
100% CHARGER CURRENT
LED = ON
FULL BATT CONTINUES
TO REGULATE BATT
UP TO 4.2V
I
CHARGE
< 10%
OF ISET
V
BATT
> 2.5V
V
BATT
< 2.4V
V
BATT
< 2.5V
V
IN
< 7VAND
>V
V
IN
BATT
AND
V
IN
> 7V +
V
BATT
> V
IN
+
EN = HIGH
ASYNCHRONOUS FROM
ANYWHERE
V
IN
> 7V +
V
BATT
> VIN +
EN = HIGH
I
CHARGE
> 20%
OF ISET
FULL BATT
LED = OFF
Figure 2. Charge State Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1508YETA | 制造商:Maxim Integrated Products 功能描述:LINEAR LI+ BATT CHARGR W INTEGRATD - Rail/Tube |
| MAX1508YETA+ | 制造商:Maxim Integrated Products 功能描述:CHRGR LI-ION 800MA 4.2V 8TDFN EP - Rail/Tube |
| MAX1508YETA+T | 功能描述:电池管理 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 |
| MAX1508YETA-T | 功能描述:电池管理 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 |
| MAX1508ZETA | 制造商:Maxim Integrated Products 功能描述:LINEAR LI+ BATT CHARGR W INTEGRATD - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
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