5-36v input automatic voltage rise and fall PD fast charging scheme drawing 30W low-cost chip

In many applications , It is necessary to raise the low voltage to a higher voltage suitable for electrical equipment . Such as single and double lithium battery power supply circuit , It is often necessary to 2.8～4.2V The low voltage rises to the available voltage 5V,9V,12V, Even higher voltage . Another example is the double lithium battery 6.0V-8.4V Voltage boost to 9V,12V,15V,20V,24V Wait for voltage to quickly charge the mobile phone , It's the current PD Fast charging solution .12V Input boost 18V 24V 36V 48V High voltage supplies large voltage and current to portable devices to meet the needs of products . The general car is 12V The voltage range of battery power loss and full charge is （10.5V~14.5V） There are relatively large fluctuations between , Some electronic products have strict requirements for voltage accuracy and voltage stability, so automatic voltage rise and fall circuit is needed to realize , When the input voltage is lower than the output set voltage , The circuit works in step-up mode BOOST Pattern , When the input voltage is higher than the output set voltage, the circuit works in BUCK Buck mode , In this way, the output voltage is always stable at the set output voltage to meet the strict voltage requirements of electronic equipment . Therefore, it is necessary to develop a low voltage 、 High current DC/DC boost , Automatic voltage rise and fall converter .

 

Zhongguang Xinyuan's new high-efficiency 、 DC boost voltage stabilizing circuit GS3662D. The input voltage range can be determined by the lowest 5 Volts to the highest 35 Volt , Output voltage 5--48V Adjustable and internal MOS The output switching current can be as high as 2A, Peak value 5A High current , It is very suitable for battery powered digital portable products ,3G Network products , Digital camera ,LCD LCD backlight circuit , Solar lighting street lamps , Voltage conversion of network communication and other products .

  The chip can work in single boost mode, as shown in the figure ：

The automatic pressure rise and fall mode is shown in the figure ：

 

GS3662D The application circuit is very simple , Few peripheral devices .

GS3662D Use standard SOP-8 Lead free packaging , Now we begin to supply in large quantities .