SPV1001 Солнечный обходной диод SM74611KTTR низкий средний прямоугольный для солнечной
- Категории: Diodes, Transistors and Thyristors >>>
- Поставщик: Shanghai,Sdo,Energy,Technology,Co.,Ltd.
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Описание и отзывы
Характеристики
Specification
Rated Current | 30A |
Reverse Voltage | 40V |
ESD(HBM) | 30KV |
Forward Current | 30A |
Operational Junction Temperature | -55℃~+175℃ |
Storage Temperature | -55℃~+175℃ |
Package | TO-263 |
Application | Solar Panels |
Size Position | Minimum(mm) | Maximum(mm) | Size Position | Minimum(mm) | Maximum(mm) |
A | 8.20 | 8.85 | H | 1.17 | 1.35 |
B | 10.00 | 10.50 | I | 4.44 | 4.86 |
C | 10.00 | 10.20 | J | 2.54 | 2.80 |
D | 1.95 | 2.55 | K | 0.35 | 0.64 |
E | 5.17 | 5.77 | L | 1.20 | 1.40 |
F | 0.68 | 0.94 | M | 0.00 | 0.26 |
G | ---- | 1.70 | P | 2.41 | 2.67 |
Products Description
What is a bypass diode？
Bypass Diodes are connected in photovoltaic arrangements for the protection of such cells that are completely under the solar light and working properly from such cells that are not working or not in the solar light.The principal fact of the power failure of the solar cell is the shading, that reduced the quantity of the light coming to the light. Shading can be due to some tree, wall of the house, or any other building.
If the shading remains on some cells of the panel there will be less power generation through this panel.
So how can we protect a photovoltaic cell, panel or even a full array from the destructive effects of partial or full shading. One simple and effective way to protect photovoltaic cells from against the destructive effects of cell shading is to connect what is called a Bypass Diode across each PV cell of a series-connected string.
Bypass diodes are connected externally and in reverse parallel with a PV cell to provide an alternative electrical path for the generated current to flow as it cannot flow through the cell when shaded. This helps preserve the performance of the series string by restricting the reverse bias voltage generated across any partially shaded cell and hence reduce the electrical power which can be dissipated by the cell.
Why a bypass is needed in pv modules？
Solar Cell Protection: Protection from Hot Spots of the single solar cells due to high reverse voltages in case of in case of shading .
Fire Safety: Protection from electric arcs within the module due to cell breaks or cell interconnection
breaks.
Energy Yield: Bypassing the shaded areas of the module.
XND18
XND18 PV bypass switched circuit is a novel rectifying circuit, consists of low-loss power switch chip, control circuit chip and energy storage element, is a solution to SiP (System in Package) used in PV Panel. Like traditional Schottky diode, and realizes bypass rectifier function. The XND18 has even lower forward voltage drop and reverse leakage current than traditional Schottky diode, can take directly the place of the bypass diode used to prevent the hot spot effect currently.
Features
● Low power dissipation, low loss, high efficiency● Very low average forward voltage
● High anti-surge capacity
● Special device for solar junction box bypass
● Lead-free product
Pin configuration | ||||
Pin number | Symbol | Description | ||
1 | A1 | Anode 1 | ||
2 | K1 | Cathode 1 | ||
3 | A2 | Anode 2 | ||
4 | K2 | Cathode 2 | ||
Functional description
The XND18 resolves the current PV bypass Schottky diode issues such as high forward voltage drop,
severe heat generation, high reverse leakage current by using the features of the very low on-resistance and very low reverse leakage current of power MOSFET.
Pins 1 & 3 are the anodes of XND18 PV bypass switched circuit, and pins 2 & 4 are the cathodes of XND18 PV bypass switched circuit. At forward-bias, the XND18 is divided into two working states: on-state and off-state. At first, the circuit is in off state, and high voltage VH across bypass switched circuit drives internal circuits to operate. After the time period VL, built-in MOSFET is on. If the circuit is in on state, the voltage across the bypass switched circuit will be reduced to low level VL. After time period TL, MOSFET switch is switched off again, the circuit is in off state, thus one operational period is completed. By control circuit
regulating TH and TL, the average on-voltage of the circuit is reduced, achieving the goal of low power dissipation and saving energy.
Pins 1 & 3 are the anodes of XND18 PV bypass switched circuit, and pins 2 & 4 are the cathodes of XND18 PV bypass switched circuit. At forward-bias, the XND18 is divided into two working states: on-state and off-state. At first, the circuit is in off state, and high voltage VH across bypass switched circuit drives internal circuits to operate. After the time period VL, built-in MOSFET is on. If the circuit is in on state, the voltage across the bypass switched circuit will be reduced to low level VL. After time period TL, MOSFET switch is switched off again, the circuit is in off state, thus one operational period is completed. By control circuit
regulating TH and TL, the average on-voltage of the circuit is reduced, achieving the goal of low power dissipation and saving energy.
Note: Pins 4 & 2 are collected in package. In use, pin 4 should be used as cathode collecting terminal.
Measuring methods
1 Average forward on-voltage VF(AVG)
1.1 Goal
To test average forward on-voltage of circuit
1.2 Measuring schematic diagram
Measuring schematic diagram of average forward on-voltage is shown in the figure below.
1.1 Goal
To test average forward on-voltage of circuit
1.2 Measuring schematic diagram
Measuring schematic diagram of average forward on-voltage is shown in the figure below.
1.3 Test conditions
a) Set up forward current IF based on user requirement;
a) Set up forward current IF based on user requirement;
1.4 Test procedures
a) Set up power supply as current limiting output that is consistent with the forward current IF used by users;
b) Collect equipment and instrument according to the schematic diagram in above figure. Positive terminal of power supply is collected with pins 1 & 3, negative terminal of power supply is collected with pin 2,oscilloscope probe probe-terminal is collected with pins 1 & 3, and oscilloscope probe ground-terminal is collected with pin 2.
a) Set up power supply as current limiting output that is consistent with the forward current IF used by users;
b) Collect equipment and instrument according to the schematic diagram in above figure. Positive terminal of power supply is collected with pins 1 & 3, negative terminal of power supply is collected with pin 2,oscilloscope probe probe-terminal is collected with pins 1 & 3, and oscilloscope probe ground-terminal is collected with pin 2.
c) Set up oscilloscope time axis as 200ms/decade, oscilloscope voltage axis as 200mv/decade, and open the “average voltage measuring” option in oscilloscope;
d) Start power supply, and read XND18 average forward on-voltage directly in oscilloscope.
d) Start power supply, and read XND18 average forward on-voltage directly in oscilloscope.
Note: If oscilloscope is not available, then multimeter can be used to test XND18 average forward on-voltage, as follows:
a) Set up power supply as current limiting output that is consistent with the forward current IF used by users;
b) Collect equipment and instrument according to the VF(AVG)measuring schematic diagram. Positive
terminal of power supply is collected with pins 1 & 3, negative terminal of power supply is collected with pin 2, multimeter positive-terminal is collected with pins 1 & 3, and multimeter negative-terminal is collected with pin 2.
c) Set up multimeter as voltage-testing mode, start power supply, and read XND18 average forward on-voltage directly in oscilloscope.
a) Set up power supply as current limiting output that is consistent with the forward current IF used by users;
b) Collect equipment and instrument according to the VF(AVG)measuring schematic diagram. Positive
terminal of power supply is collected with pins 1 & 3, negative terminal of power supply is collected with pin 2, multimeter positive-terminal is collected with pins 1 & 3, and multimeter negative-terminal is collected with pin 2.
c) Set up multimeter as voltage-testing mode, start power supply, and read XND18 average forward on-voltage directly in oscilloscope.
2 Reverse leakage current IR
2.1 Goal
To test the reverse leakage current of circuit
2.2 Measuring schematic diagram
Measuring schematic diagram of reverse leakage current is shown in the figure below.
2.1 Goal
To test the reverse leakage current of circuit
2.2 Measuring schematic diagram
Measuring schematic diagram of reverse leakage current is shown in the figure below.
Note
To guarantee current-measuring accuracy, it is recommended that ammeter at a resolution of 6½ bit should be used for test.2.3 Test conditions
1. a) VR =40V；
2.4 Test procedures
a) Collect circuit and instrument according to the IR measuring schematic diagram.. Negative terminal of power supply is collected with pins 1 & 3 of the XND18, negative terminal of
ammeter is collected with pin 2, and ammeter positive-terminal collects with positive-terminal
of power supply.
b) Set up supply voltage as 40V, and switch on power supply.
c) Set up multimeter as DC current-testing mode, and read reverse leakage current IR directly in
1. a) VR =40V；
2.4 Test procedures
a) Collect circuit and instrument according to the IR measuring schematic diagram.. Negative terminal of power supply is collected with pins 1 & 3 of the XND18, negative terminal of
ammeter is collected with pin 2, and ammeter positive-terminal collects with positive-terminal
of power supply.
b) Set up supply voltage as 40V, and switch on power supply.
c) Set up multimeter as DC current-testing mode, and read reverse leakage current IR directly in
multimeter.
Note: XND18 PV bypass switched circuit test differs to a certain extent from traditional
Schottky diode test. Aimed at XND18 junction box mass-production and mass-test, SWID has
developed high-efficiency, cost-effective testing system. If need be, SWID can provide
customers with solution package for it.
Note: XND18 PV bypass switched circuit test differs to a certain extent from traditional
Schottky diode test. Aimed at XND18 junction box mass-production and mass-test, SWID has
developed high-efficiency, cost-effective testing system. If need be, SWID can provide
customers with solution package for it.
Certifications
Company Information
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FAQ
1) Are you a factory or trading company?
We have our own factories.
2) What is your FOB port?
FOB Shanghai, and we can according to customer requirements.
3) What is your delivery time?
3-7 days for samples, 10-30 days for large quantities, according to your order.
4) How about your after-sale service?
We can offer you timely and best after-sales service. Now we have built our relationship in many overseas countries like Brazil, Pakistan, Japan and German. It makes our after-sale service very easy and effective to reach you. Also our 24 hours online inquiry service is available.
5) Can I have my own logo on your products?
Yes, OEM&ODM service is available.
6) How to guarantee the quality of your products?
We have our own factories.
2) What is your FOB port?
FOB Shanghai, and we can according to customer requirements.
3) What is your delivery time?
3-7 days for samples, 10-30 days for large quantities, according to your order.
4) How about your after-sale service?
We can offer you timely and best after-sales service. Now we have built our relationship in many overseas countries like Brazil, Pakistan, Japan and German. It makes our after-sale service very easy and effective to reach you. Also our 24 hours online inquiry service is available.
5) Can I have my own logo on your products?
Yes, OEM&ODM service is available.
6) How to guarantee the quality of your products?
Our products have U L, TUV and other certifications.
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