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参数资料
| 型号： | LT3652IMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/26页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER SOLAR 2A 12MSOP |
| 标准包装： | 37 |
| 功能： | 充电管理，太阳能 |
| 电池化学： | 铅酸，LiFePO4，锂离子，锂聚合物，镍镉，镍氢 |
| 电源电压： | 4.95 V ~ 32 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-TSSOP （0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 12-MSOP，裸露焊盘 |
| 包装： | 管件 |
| 配用： | DC1568A-ND - BOARD BATTERY CHARGER SOLAR PWR |
LT3652
APPLICATIONS INFORMATION
cleaning measures should be implemented to prevent
board contamination, and low-leakage solder flux is
recommended.
Input Supply Voltage Regulation
The LT3652 contains a voltage monitor pin that enables
programming a minimum operational voltage. Connect-
ing a resistor divider from V IN to the V IN_REG pin enables
programming of minimum input supply voltage, typically
used to program the peak power voltage for a solar panel.
Maximum charge current is reduced when the V IN_REG pin
is below the regulation threshold of 2.7V.
If an input supply cannot provide enough power to satisfy
the requirements of an LT3652 charger, the supply voltage
will collapse. A minimum operating supply voltage can
thus be programmed by monitoring the supply through
a resistor divider, such that the desired minimum volt-
age corresponds to 2.7V at the V IN_REG pin. The LT3652
servos the maximum output charge current to maintain
the voltage on V IN_REG at or above 2.7V.
Programming of the desired minimum voltage is ac-
complished by connecting a resistor divider as shown in
MPPT Temperature Compensation
A typical solar panel is comprised of a number of series-con-
nected cells, each cell being a forward-biased p-n junction.
As such, the open-circuit voltage (V OC ) of a solar cell has
a temperature coefficient that is similar to a common p-n
diode, or about –2mV/°C. The peak power point voltage
(V MP ) for a crystalline solar panel can be approximated as
a fixed voltage below V OC , so the temperature coefficient
for the peak power point is similar to that of V OC .
Panel manufacturers typically specify the 25°C values for
V OC , V MP , and the temperature coefficient for V OC , making
determination of the temperature coefficient for V MP of a
typical panel straight forward.
The LT3652 employs a feedback network to program the
V IN input regulation voltage. Manipulation of the network
makes for efficient implementation of various temperature
compensation schemes for a maximum peak power track-
ing (MPPT) application. As the temperature characteristic
for a typical solar panel V MP voltage is highly linear, a
Figure 6. The ratio of R IN1 /R IN2 for a desired minimum
voltage (V IN(MIN) ) is:
R IN1 /R IN2 = (V IN(MIN) /2.7) – 1
If the voltage regulation feature is not used, connect the
V IN_REG pin to V IN .
V OC(25°C)
V MP(25°C)
V MP
V OC TEMP CO.
V OC
V OC – V MP
5
15
25
35
45
55
TEMPERATURE (°C)
INPUT
SUPPLY
R IN1
R IN2
V IN
LT3652
V IN_REG
3652 F06
3652 F07
Figure 7. Temperature Characteristics for Solar Panel
Output Voltage
Figure 6. Resistor Divider Sets Minimum V IN
3652fd
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3652IMSETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger for Solar Power |
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| LT3653EDCB#TRMPBF | 功能描述:IC REG BUCK ADJ 1.2A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:升压（升压） 输出类型:两者兼有 输出数:1 输出电压:5V，2 V ~ 16.5 V 输入电压:2 V ~ 16.5 V PWM 型:- 频率 - 开关:45kHz 电流 - 输出:50mA 同步整流器:无 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:8-PDIP |
| LT3653EDCB#TRPBF | 功能描述:IC REG BUCK ADJ 1.2A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
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