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参数资料
| 型号： | LT3652HVEDD#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | BATTERY CHARGE CONTROLLER, PDSO12 |
| 封装： | 3 X 3 MM, LEAD FREE, PLASTIC, DFN-12 |
| 文件页数： | 7/24页 |
| 文件大小： | 250K |
| 代理商： | LT3652HVEDD#TRPBF |
LT3652HV
15
3652hvf
To satisfy the 250k equivalent resistance to the VFB
pin:
RFB3 = 250k 27.5k
RFB3 = 223k.
Because the VFB pin is a relatively high impedance node,
stray capacitances at this pin must be minimized. Special
attention should be given to any stray capacitances that
can couple external signals onto the pin, which can pro-
duce undesirable output transients or ripple. Effects of
parasitic capacitance can typically be reduced by adding
a small-value (20pF to 50pF) feedforward capacitor from
the BAT pin to the VFB pin.
Extra care should be taken during board assembly. Small
amounts of board contamination can lead to significant
shifts in output voltage. Appropriate post-assembly board
cleaning measures should be implemented to prevent
board contamination, and low-leakage solder flux is
recommended.
Input Supply Voltage Regulation
The LT3652HV contains a voltage monitor pin that enables
programming a minimum operational voltage. Connect-
ing a resistor divider from VIN to the VIN_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 VIN_REG pin
is below the regulation threshold of 2.7V.
If an input supply cannot provide enough power to satisfy
the requirements of an LT3652HV charger, the supply volt-
age will collapse. A minimum operating supply voltage can
thus be programmed by monitoring the supply through
a resistor divider, such that the desired minimum voltage
corresponds to 2.7V at the VIN_REG pin. The LT3652HV
servos the maximum output charge current to maintain
the voltage on VIN_REG at or above 2.7V.
Programming of the desired minimum voltage is ac-
complished by connecting a resistor divider as shown in
Figure 6. The ratio of RIN1/RIN2 for a desired minimum
voltage (VIN(MIN)) is:
RIN1/RIN2 = (VIN(MIN)/2.7) – 1
APPLICATIONS INFORMATION
If the voltage regulation feature is not used, connect the
VIN_REG pin to VIN.
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 (VOC) 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
(VMP) for a crystalline solar panel can be approximated as
a fixed voltage below VOC, so the temperature coefficient
for the peak power point is similar to that of VOC.
Panel manufacturers typically specify the 25°C values for
VOC, VMP, and the temperature coefficient for VOC, making
determination of the temperature coefficient for VMP of a
typical panel straight forward.
The LT3652HV employs a feedback network to program
the VIN input regulation voltage. Manipulation of the
network makes for efficient implementation of various
temperature compensation schemes for a maximum peak
Figure 6. Resistor Divider Sets Minimum VIN
VIN
VIN_REG
RIN2
RIN1
LT3652HV
INPUT
SUPPLY
3652 F06
Figure 7. Temperature Characteristics for Solar Panel
Output Voltage
TEMPERATURE (°C)
5
PANEL
VOLTAGE
(V)
25
45
55
15
35
3652 F07
VOC(25°C)
VMP(25°C)
VMP
VOC
VOC TEMP CO.
VOC – VMP
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3652HVEMSE#PBF | 功能描述:IC BATTERY CHARGER 2A 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LT3652HVEMSE#PBF | 制造商:Linear Technology 功能描述:BATTERY CHARGER IC LEAD ACID LI-ION L 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, LITHIUM, 2A, MSOP12 |
| LT3652HVEMSE#TRPBF | 功能描述:IC BATTERY CHARGER 2A 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT3652HVEMSE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger |
| LT3652HVEMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger |
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