9-56V/2-20A DC Automatic Buck Boost Converter Step up down Converter CC CV for Battery Charging

9-56V/2-20A DC Automatic Buck Boost Converter Step up down Converter CC CV for Battery Charging

Read before purchasing:
- Basic technical knowledge and hands-on ability are highly recommended.
- Users need to modify parameters such as undervoltage protection parameters. We can tell you how to modify it.
- Certain power supply test and measurement capabilities and equipment are recommended. Do not test this power supply with a 3A adjustable regulated power supply used in labs.
- Do not test the current-limiting power supply in CC mode with an electronic load.
- Output current adjustment range: For example, the input power is sufficient, the output power supply is 20V and a 0.4Ω resistor is connected to adjust CC potentiometer, the output current can be adjusted to a maximum of 20A, but cannot be adjusted to the minimum limit value (except 0A).

Typical Performance:
- Non-isolated four-switch synchronous buck-boost
- Wide input DC 9-58V, output DC 3-56V
- Peak efficiency> 98.0%
- Over-current protection
- Short-circuit protection self-recovery
- Remote ON/OFF
- Over-temperature protection
- Optional temperature-controlled fan
- Constant current indicator
- Adjustable output voltage and current
- Maximum inductor current of 20A
- Fast dynamic response, high voltage regulation accuracy, constant frequency operation MEI is convenient for prediction
- Power can exceed 450W (input and output>24V)
- All tests are made at 24V input voltage, with resistive load, and 25°C room temperature

Attention:
1. Please calculate whether the maximum load is suitable according to lout=VIN*Iin*(0.92-0.98)/Vout. The parameter range needs to be within the above values, and Iin(max) = 20A can fit all parameters. For example, Vin=12V, Vout=24V, lout=10A. Vin=48V, Vout=24V, Iout exceeds 15A.
2. The boost output capacitor ripple current is large, the buck input capacitor ripple current is large, reduce the capacitor heating and extend the lifespan, and the electrolytic capacitor can be connected in parallel.
3. Battery can be connected for charging. The output voltage must be properly adjusted before connecting to a target battery. Do not connect batteries with a height set voltage.
4. The slow start time is the same as EN controlled delay time. The output start-up time needs to be adjusted when the input source start-up time is long. For example, the AC adaptation output full-load voltage settling time is 50ms, and the start-up time of this power supply is 2ms, which may cause AC to fail to start normally with load.
5. The current limit cannot be stabilized and continuously adjusted within 2A, and the recommended current limit range is 3-20A.
6. Frequent hot swapping is not supported, because hot swapping has a certain chance of equipment damage due to surge current and voltage.
7. Can only be used in DC systems. If there is a switching power supply, it is necessary to pay attention to the isolation and grounding problems of mains electricity.
8. Some parameters may be adjusted for different applications.

Package Included:
- 1 x Power Supply Board

Note:
- Battery is not included in the package.

Attention:
1. The test power supply must ensure that the input source can provide a large enough current (>22A) to ensure that the power supply does not collapse or even be damaged, especially when starting with load.
2. The boot time of the input source must be less than the startup time of this power supply (e.g., using an adapter as input), otherwise it may not be possible to start with load.
3. The input wire connected to this power supply must not be too long (the internal resistance of the wire must not be too large), otherwise the power supply may oscillate and be abnormal.
4. If there are diodes in series with the input source to this power supply, the power supply may be damaged by the surge voltage caused by the instantaneous on-off (line BOOST effect).
5. Do not use the CC mode of an electronic load as the load of this power supply. It is recommended to use the CR mode. CC mode draws current, this power supply is limited, and the constant current state will cause this power supply to crash.
6. It is recommended to connect adjusted output voltage with a resistive load (dummy load) with small current to ensure the real-time adjustment of output voltage potentiometer, otherwise the output voltage will change slowly and the adjustment value will be inaccurate.