LM2576-ADJ power board

1. Product Introduction The LM2576 series is a 3A current output step-down switching integrated voltage stabilizing circuit produced by National Semiconductor. It contains a fixed frequency oscillator (52kHz) and a reference voltage regulator (1.23V), and has complete protection. Circuits, including current limit and thermal shutdown circuits, etc., can use this device to form an efficient voltage stabilizing circuit with only a few peripheral components.
2. Application scenarios 1. Vehicle-mounted voltage stabilized power supply, 2. Electronic equipment power supply 3. LED high-power power supply 4. Equipment debugging test power supply 5. Electric vehicle controller power supply 6. Communication and other scenarios
3. Product overview LM2576 access Power supply (8V-40V), module output adjustable 1.23-37V, maximum output current 3A. 1. Internally integrated MOSFET, fewer peripheral components, low system cost; 2. Wide voltage range input, the input voltage can reach up to 40V; 3. Output 3.3V, 5V, 12V, 15V and ADJ (adjustable) are optional, the maximum 3A current; 4. Thermal shutdown and current limit; 5. 75%~88% (efficiencies are different at different voltage outputs); 6. TO-263 package.
4. Product parameters 1, 5.08 terminal interface: 2, input voltage: 5-40V3, output voltage: 1.23-37V4, maximum output current: 3A5, conversion efficiency: 75%~88%6, switching frequency: fixed 52kHz switching frequency 7. Maximum output power: less than 30W8, built-in current limiting function9, built-in thermal shutdown protection function10, operating temperature: -20℃-+85℃11, product introduction picture is as follows:
5. Instructions for use: 1. Use of this product Simple, connect it to the 5.08 terminal block according to the input, and reserve the input and output pads, and you can also solder the wires. The EN signal controls the output and is active at low level. The static power consumption is 5mA2, the module output is adjustable, and the output voltage can be adjusted by using an adjustable resistor. (The output voltage can be tested with a multimeter or oscilloscope) 3. There are 3mm screw fixing holes around the product to facilitate user installation.
6. Precautions and remarks: 1. Precautions: When working in high current mode for a long time, pay attention to the heat dissipation of the module. 2. The module has a maximum voltage of 40V. Pay attention to the positive and negative polarities. Do not connect them reversely, otherwise the module will be burned out. 3. Please use it under the maximum output load and cannot exceed the maximum current of the module. 4. The module is simple to use and has a simple interface. The principle is simple. It can be used directly in engineering applications.
Physical map: