DC/DC понижаващ модул от 4-38V към 1.25-36V 5A 72W

• Входно напрежение: 4-38V
• Изходно напрежение: 1.25-36V, регулируемо непрекъснато
• Изходен ток: регулируем, максимум 5А
• Изходна мощност: максимум 75W
• Работна температура: -40~+85 градуса
• Работна честота: 180KHz
• Ефективност на преобразуване: максимум 96%
• Защита от късо съединение: с (ограничаващ ток 8A)
• Защита от прегряване: Да (прегряване, автоматично изключване, изход)
• Защита срещу обратно свързване на входа: Не (например, моля, въведете високотоков диод във входния низ)
• Монтаж: 4 винта 3 мм
• Режим на свързване: клема за свързване или клема за заваряване, V-IN е вход, а V-OUT е изход
• Размер на модула: дължина 61,7 мм, ширина 26,2 мм, височина 15 мм

Two , scope of application

A. use as an ordinary step-down module with over-current protection capability

Usage method:

1. adjust constant voltage potentiometer to make the output voltage reach the voltage value you want

2. with a multimeter measuring deflection of 10A current output short circuit current (directly to the two pen received output end can be adjusted at the same time), constant current potentiometer to output current reaches a predetermined value of over-current protection. For example, the current value displayed by the multimeter is 4A. Then the maximum current can be only 4A when you use the module. When the current reaches 4A, the red constant voltage constant current indicator is on, otherwise the indicator lights out

Note: in this state, when the output current has 0.05 ohm current sampling resistance, the voltage drop of 0~0.3V will be normal when connected to the load. This is a normal phenomenon! The pressure drop was not your load was low, but dropped to the sampling resistance.

B. used as a battery charger

With the function of constant current module cannot be used to charge the battery, the battery and charger power consumption after the great pressure, causing the charging current is too large, causing damage to the battery, so from the beginning to use the constant current charging of the battery when charging to a certain degree of automatic switch back to constant voltage charging.

Usage method:

1. you need to determine the floating voltage of the rechargeable battery and the charging current; (if the lithium battery parameter is 3.7V/2200mAh, then the float voltage is 4.2V, the maximum charging current of 1C, namely 2200mA)

2. the no-load condition, multimeter output voltage regulating potentiometer, constant voltage to the output voltage to the floating voltage; (if the charge, to the 3.7V output voltage of the lithium battery can be adjusted to 4.2V)

3. with a multimeter measuring deflection of 10A current output short circuit current (directly to the two pen received output end can be adjusted at the same time), constant current output current reaches the charging current potentiometer to a predetermined value;

4. charging lamp current factory default is 0.1 times of the charging current; (the battery during charging current is reduced gradually, gradually from the constant current charging to constant voltage charging, if the charging current is set to 1A, then when the charging current is less than 0.1A, the blue light, green light, this time the battery is fully charged)

5. Connect the battery and charge it.

/steps 1, 2, 3, 4/: the input terminal is connected to the power supply and the output is no-load and the battery is not connected

C. as high power LED constant current drive module

1. make sure that you need to drive the operating current and the maximum operating voltage of the LED;

2. under no-load condition, the multimeter measures the output voltage and regulates the constant voltage potentiometer to make the output voltage reach the highest working voltage of LED;

3. measure the short circuit current with Multimeter 10A current gear, adjust the constant current potentiometer at the same time, make the output current reach the predetermined LED working current;

4. connect LED, test machine.

/steps 1, 2 and 3 are: input connection power, output no load, no LED light/ Note: when the module is used more than 3A and 35W, please strengthen the heat dissipation!!!