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| 型号： | MAX8900DEWV+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 28/35页 |
| 文件大小： | 0K |
| 描述： | IC LI BATTERY CHARGER 1.2A WLP |
| 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： | 3.4 V ~ 6.3 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 30-WFBGA，WLBGA |
| 供应商设备封装： | 30-WLP |
| 包装： | 带卷 (TR) |
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MAX8900A/MAX8900B/MAX8900C
1.2A Switch-Mode Li+ Chargers with ±22V Input
Rating and JEITA Battery Temperature Monitoring
Inductor Selection
Consider inductance, current rating, series resistance,
physical size, and cost when selecting an inductor.
These factors affect the converter’s efficiency, maximum
output current, transient response time, and output volt-
age ripple. Tables 5 and 6 show suggested inductor
values based upon input voltage and laboratory tests.
When using the MAX8900_ with IN voltages below 8.5V,
select the inductor to be 1.0 F H. This keeps the inductor
peak-to-peak ripple current to the average DC inductor
current at the full load (LIR) between 40% to 50%. If a
lower ripple is desired, select an inductance from 2.2 F H
Table 5. Recommended Inductor Selection
to 10 F H. Higher input voltages require higher inductors
to maintain the same inductor current ripple.
The trade-off between inductor size and converter effi-
ciency for step-down regulators varies as the LIR varies.
LIR is the ratio of the inductor peak-to-peak ripple current
to the average DC inductor current at the full-load cur-
rent. A higher LIR value allows for smaller inductance, but
result in higher losses and higher output voltage ripple.
To reduce the power dissipation and improve transient
response, choose an inductor that has a low DC series
resistance as well as a low AC resistance at 3.25MHz.
Note that it is typical for low inductance inductors such
as 1 F H to have a Q 30% initial variation in inductance.
Furthermore, some physically smaller inductors show a
DC INPUT VOLTAGE
RANGE (V)
3.4 to 8.7
8.7 to 15.8
15.8 to 27.4
RECOMMENDED INDUCTOR
FOR 40% LIR
1 F H inductor, LQM2HPN1R0G0, Murata,
2.5mm x 2.0mm x 0.9mm, 55m I , 1.6A.
1.5 F H inductor, LQM2HPN1R5G0, Murata,
2.5mm x 2.0mm x 0.9mm, 70m I , 1.5A
2.2 F H inductor, LQM2HPN2R2G0, Murata,
2.5mm x 2.0mm x 0.9mm, 80m I , 1.3A.
substantial degradation in inductance with increased DC
current. It is typical for inductor manufacturers to specify
their saturation current at the level when the initial induc-
tance decreases by 30% or at the level where the inter-
nal inductor temperature rises +40 N C above the ambient
temperature. Because of differences in the way inductor
manufacturers specify saturation current (I SAT ), it is criti-
cal that you study and understand your manufacturer’s
specification criteria.
Table 6. Recommended Inductor
MANUFACTURER
SERIES
INDUCTANCE (μH)
ESR ( I )
CURRENT RATINGS (A)
DIMENSIONS
1.0
0.059
1.68
Coilcraft
EPL2014
1.5
0.075
1.60
2.0 x 2.0 x 1.4 = 5.6mm 3
2.2
1.0
0.120
0.085
1.30
1.40
Murata
LQM2MPN_G0
LQM2HPN_G0
1.5
2.2
3.3
1.0
1.5
2.2
3.3
0.110
0.110
0.120
0.055
0.070
0.080
0.100
1.20
1.20
1.20
1.60
1.50
1.30
1.20
2.0 x 1.6 x 0.9 = 2.88mm 3
2.5 x 2.0 x 0.9 =4.5mm 3
TDK
MLP2520S
CPL2512
1.0
1.5
1.0
2.2
0.060
0.070
0.090
0.135
1.50
1.50
1.20
0.90
2.0 x 2.5 x 1.0 = 5mm 3
2.5 x 1.5 x 1.2 = 3.6mm 3
1.0
0.110
1.20
TOKO
MDT2520-CH
MDT2520-CN
1.5
2.2
1.0
1.5
2.2
3.3
0.140
0.16
0.085
0.095
0.105
0.115
1.10
1.05
1.35
1.25
1.20
1.15
2.5 x 2.0 x 1.0 = 5mm 3
2.5 x 2.0 x 1.2 = 6mm 3
28
Maxim Integrated
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相关代理商/技术参数 |
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|---|---|
| MAX8901AETA+ | 制造商:Maxim Integrated Products 功能描述:HIGHEST EFFICIENCY SUPPLY 8TDFN EP - Rail/Tube |
| MAX8901AETA+T | 功能描述:LED照明驱动器 Supply for 2 to 6 Series WLEDs RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX8901BETA+ | 制造商:Maxim Integrated Products 功能描述:HIGHEST EFFICIENCY SUPPLY FOR 2 TO 6 SERIES WLEDS IN A - Rail/Tube |
| MAX8901BETA+CAR | 功能描述:LED照明驱动器 RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX8901BETA+T | 功能描述:LED照明驱动器 Supply for 2 to 6 Series WLEDs RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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