Scheme with 2576+358+ voltage regulator tube - Power Circuit - Circuit Diagram

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

MOS power IC full range

1.5PF SOT23-6 Low Capacitance 5V Breakdown Voltage 6V SRV05

Shunuo varistor / ESD varistor / product complete / Sunlord first-class agent

Schematic diagram of the scheme using lm2576+lm358+ regulator

Advantages: (1) Combined with 358 (double op amp) due to 2576 built-in overcurrent protection, over temperature protection and other safety measures
To achieve output constant voltage CV, constant current CC, overvoltage protection OVP and other functions; achieve a reliable, safe and complete lithium battery charging solution;
(2) Since the 2576 is a fixed 52K PWM converter, the EMI design of the car charger is relatively easy;
(3) Since both 2576 and lm358 are manufactured by 40V high-voltage bipolar process, they are more “skinny”;
(4) This scheme is commonly used in car chargers of about 0.8A ~ 1.5A;
Disadvantages: (1) The system is relatively complex and costly;
(2) Constant current CC and overvoltage protection OVP are realized by controlling the output of 358 to control the EN of 2576. Therefore, the charging current has a large ripple, and the response speed of CC and OVP is not fast enough (by switching 2576 whether Work to achieve);