Application of D4520 Stereo Headphone Amplifier Circuit

D4520 is a power amplifier integrated circuit with headphone as the load. The internal circuit is composed of preamplifier, noise canceling circuit and smoothing filter. The circuit has wide operating voltage range, low noise during power switch and good ripple rejection. The .D4520 is mainly suitable for radios with headphones as a load, recorders.

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Application of D4520 Stereo Headphone Amplifier Circuit

Military power system refers to the power supply which can provide power for many equipments or other use ,as this items developed through our company R&D department,it has a high energy density and high working power.Seconldy as a new energy it uses ,it is totally pollution-free.Thirdly ,for this miltifunction power pack , Capacity, resistance, Voltage, platform time consistency is good.With short-circuit production function, it get more safe and reliable.Besides YFJ company has a very strict test before sending to customers in order to ensure of our product quality .

Charging chip protection plate(using military-grade smart IC chip, with overcurrent, overpressure, overcharge, overcharge, undervoltage, short circuit, reverse connection, equilibrium voltage and equilibrium charging and other multiple protection functions) to ensure the safety and reliability of the Battery Pack.


1. Solar panel: 18V/40W poly with 5m cable

2. Battery: 12V*40Ah Lithium Battery
3. Output power:  500W inverter
4. Charging time: 4 hours
5. Extra battery voltage: DC12V
6. DC output: 5V/2A and 12V/5A
7. DC input: 12V/5A (PV charger)
8. Input voltage (Max): 24V
9. LED Lamp: 3W led lamp with 5m cable*2pcs
10. Lighting time: 74 Hours (2 lamps)
11. USB output: 5V/4A*4pcs
12. 4 in 1 charging kit: 1 set
13. AC output: 220V/50Hz or 110V/60Hz
14. Car boot port voltage: 12V/600A(instant current)
15. Storage time: 6 months
16. Operation Humidity: 10%RH-90%RH
17. Protection grade: IP42
18. Charge operating temperature: 0-45°C
19. Discharge operating temperature: -10~50°C
20. Certification: CE\FCC\UN38.3\ROHS
21. Dimentions: 480*305*165mm/power box
22. Weight: 8.5kg for power box, 13KG for whole set

23. Color option: Red and white, Yellow and white

military power systems

Military Power Systems

Military Power Systems,Military Power Supply,Battery Power Supply,Adjustable Power Supply

YFJ TECHNOLOGY (HK) CO.,LIMITED , http://www.yfjpower.com