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參數(shù)資料
| 型號： | LT3652HVEMSE#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | BATTERY CHARGE CONTROLLER, PDSO12 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-12 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 250K |
| 代理商： | LT3652HVEMSE#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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3652HVIDD#PBF | 功能描述:IC BATTERY CHARGER 2A 12-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LT3652HVIDD#TRPBF | 功能描述:IC BATTERY CHARGER 2A 12-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LT3652HVIDD-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Power Tracking 2A Battery Charger |
| LT3652HVIDD-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Power Tracking 2A Battery Charger |
| LT3652HVIMSE#PBF | 功能描述:IC BATTERY CHARGER 2A 12-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
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