What's the working principle of the LED driver boost/boost converter?

What's the working principle of the LED driver boost/boost converter?

Led's drive is generally referred to as the Led's Luminous Module Controller, which controls the current. If the control current is not good, the lamp may be damaged. Sometimes the current and voltage can be very unstable, then the driver will play a role. So LED drives are very good to check for damage during use. If it is damaged, it can cause the light to dim or turn off directly, and it can also cause flashes.

Led driver is an electronic device that drives the LED light to emit light and work normally. It is equivalent to the heart of the LED lamp. When the driver is in problem, the whole LED lamp will be in problem.

So, what is the working principle of the LED driver boost-boost converter?

Boost-down converter is a good choice for LED drivers in low voltage applications. The reasons are that they can be used to drive LED strings (boost and lower voltage) with voltage above and below the input voltage, are very efficient (easily reaching more than 85%), discontinuous operation mode can suppress the change of input voltage (provide excellent line voltage adjustment), peak current control mode allows the converter to adjust the LED current without complex compensation (simplified design), can easily achieve linear and PWM LED brightness adjustment, Failure of the switch transistor will not damage the LED, etc. Figure 2 shows the connection circuit between the step-down, step-up and step-down converters and the LED series.

However, any change of the LED series voltage will cause the corresponding change of the LED current. Another problem is that the open LED state can cause high voltage in the circuit that damages the converter. Additionally, additional circuits are needed to convert the constant power converter to the constant current converter and to protect the converter without load.