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参数资料
| 型号： | MAX8900DEWV+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 26/35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
A. BASIC THERMISTOR CONFIGURATION
B. ADVANCED THERMISTOR CONFIGURATION
R TB
AVL: E5
AVL
AVL IS THE
INTERNAL
ANALOG SUPPLY
MAX8900_
R TB
AVL: E5
AVL
AVL IS THE
INTERNAL
ANALOG SUPPLY
MAX8900_
THM: E4
THM: E4
R THRM
T
COLD: T1
R TP
R TS
COLD: T1
THERMOMETER
DECODE LOGIC
BAT_T
T
R THRM
THERMOMETER
DECODE LOGIC
BAT_T
COOL: T2
TO DC-DC
CHARGE
CONTROLLER
WARM: T3
HOT: T4
Figure 11. Thermistor Monitor Detail
Thermal Foldback
Thermal foldback maximizes the battery charge current
while regulating the MAX8900_ junction temperature. As
COOL: T2
TO DC-DC
CHARGE
CONTROLLER
WARM: T3
HOT: T4
During shutdown, the step-down charger is off and all
internal blocks except the bias circuitry is turned off. Once
the junction has cooled by 15 N C, the IC resumes operation.
shown in Figure 12, when the die temperature exceeds
T REG , a thermal limiting circuit reduces the battery
charge-current target by A TREG , until the charge cur-
rent reaches 25% of the fast-charge current setting. The
charger maintains 25% of the fast-charge current until
the die temperature reaches T SHDN . Please note that
the MAX8900_ is rated for a maximum ambient tempera-
ture of +85 N C. Furthermore, although the maximum die
temperature of the MAX8900_ is +150 N C, it is common
industry practice to design systems in such a way that
the die temperature never exceeds +125 N C. Limiting the
maximum die temperature to +125 N C extends long-term
reliability.
1.4
1.2
1.0
0.8
0.6
0.4
0.2
CHARGE CURRENT
vs. JUNCTION TEMPERATURE
T2 < V THM < T3
I FC = 1.19A
I FC = 0.756A
Thermal Shutdown
As shown in Figure 12, when the MAX8900_ die tempera-
ture exceeds T SHDN , the IC goes into thermal shutdown.
0
50
75
100 125
T J (°C)
150
175
Figure 12. Charge Current vs. Junction Temperature
26
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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