Recently, RAVPOWER launched1A1CDual port intelligent fast charging series mobile power supply with power of 18W, 29W and60WThe capacity is also increased from 10000 mA to 20000 mA.Today, the charging head network continues to bring you RAVPOWER20000mAh60WDisassemble the PD fast charging mobile power supply, and see how the design of this large capacity and high-power fast charging mobile power supply works.
This product is thin and flat, equipped with USB-C two-way fast charging port and USB-A intelligent fast charging port, supporting 30W fast charging input and60WFast charging output, with complete voltage gears.In addition, the total output power of both ports simultaneously reaches60WIt can charge two devices at the same time to improve the charging efficiency. At the same time, its large capacity makes it very suitable for carrying out remote travel.
The packaging box is blue and white, with a large R letter printed on the front center, and the top and bottom are RAVPOWER brand and product name.
The parameter information of the product is printed on the lower back of the box.
Mobile power supply, CC data cable and user manual are included in the package.The body shell of the mobile power supply is sanded, the corners are rounded, and the use does not hurt the hand. The RAVPOWER brand is gravure printed on the body.
The shell at one corner of the fuselage is in gray color, and the side is equipped with power key and LED power indicator. The top is1A1CInterface, printed with PD and iSmart beside the interface.
The back of the fuselage is marked with the parameter information of the mobile power supply Model: RP-CPBN004 Lithium battery capacity:20000mAh/72.6Wh Minimum capacity of lithium battery: 19400mAh/70.42Wh Rated capacity: 20V/3A 2700mAh Lithium battery cell: 4INR21/70 PD input: 5V3A, 9V3A, 12V2.5A, 15V2A, 20V1.5A, 30W Max PD output: 5V3A, 9V3A, 12V3A, 15V3A, 20V3A ISmart output: 5V3A, 9V2A, 12V1.5A Total output: PD 45W+iSmart 5V3A, 60W Max Manufacturer: Shenzhen Linyoutong Technology Development Co., Ltd
Use ChargeLAB POWER-Z KT002 to detect the output protocol of the USB-A interface. The display supports Apple 2.4A, Samsung 5V/2A, DCP, and QC2.0/3.0 protocols.
Use KT002 to detect the output protocol of the USB-C interface. The display also supports Apple 2.4A, Samsung 5V/2A, DCP, and QC2.0/3.0 protocols.
In addition, its PDO message shows that the USB-C interface also supports the USB PD3.0 fast charging standard, with five fixed voltage gears of 5V3A, 9V3A, 12V3A, 15V3A, and 20V3A.
2、 Disassembly of RAVPOWER 60W mobile power supply
The fuselage shell is sealed with buckles, four batteries are placed inside, PCB board is placed on the side, and isolation board is set between the battery and the circuit board for protection.
Paste several pieces of insulating tape on the battery to insulate the solder joints.
PCB front view.
The back of the PCB board is at a glance, the inductance is glued and fixed, and the USB-A mother seat is pasted with highland barley insulation paper for insulation and dust prevention.
After observing and analyzing the front and back circuits of PCB board, it is found that RAVPOWER20000mAhThe 60W PD fast charging mobile power supply is equipped with lithium battery protection and two independent step-up/step-down circuits,1A1CThe interface output is controlled by the protocol chip, the power is distributed intelligently, and there are four strings of cores.Next, we will analyze the information of each component from the discharge of the cell to the two-way output.
The battery is connected by spot welding of nickel sheet and protected by pasting highland barley insulating paper.
Close up of the other end, also paste highland barley insulation paper.
Battery model INR21700M50T, 21700 size, 5000mAh, charging limit voltage 4.2V.
Close up of thermistor, glue application and adhesive tape fixation.
Seiko S8254AA battery protection IC provides overvoltage and overcurrent protection for four series battery packs.
Details of Seiko S8254.
Four Dongyuan FKBB3103, PMOS, withstand voltage 30V, two in parallel, in opposite series, for battery protection.
Details of Dongyuan FKBB3103.
Nanxin SC8812A high-efficiency synchronous two-way voltage rise and fall chip supports voltage rise or drop to charge 1 to 4 batteries, complete charging and discharge control, and support various voltage conversion and charging status indication;Built in 10bit ADC, I2C numerical control interface is adopted, output voltage and current limiting value are configured, and simplified external devices help reduce the board area.
Nanxin SC8812A data information.
Four AOS Wandai AON7544, NMOS, withstand voltage 30V, and voltage conversion is controlled by Nanxin SC8812A.
AOS AON7544 Details.
R010 Current sampling resistance.
Close up of filter capacitor, specification: 35V 100 μ F, from Yongming.
Weimeng ME6203A33 3.3V LDO supplies power to the core sea MCU.
Weimeng ME6203 details.
Chipsea Core Sea Technology CS32G020K8U6 32-bit MCU, CS32G020 series is a USB-C controller that supports USB Type-C and PD3.0 protocols launched by Core Sea Technology, and can be used in PC power adapter, mobile phone charger, mobile power supply, car charger, HUB and other fields.
CS32G020 is embedded with ARM Cortex-M0 core, and the main frequency is up to 48MHz, so it can support a wide range of industrial control and occasions requiring high-performance CPU.Built in 64K byte program flash, configurable data flash size (shared with program flash), 4K byte LDROM, 8K byte SRAM.CS32G020 package includes QFN24 and QFN32.
Details of Core Sea Technology CS32G020K8U6.
Close up of power key, patch welding.
The four LED lights for power display are covered with black foam to prevent cross lighting.
Dongyuan FKBB3103, which is used as the USB-C interface switching protection switch.
The silk screen JRBQE chip is actually a Silijie SY8104 high-efficiency synchronous rectification step-down converter, which is used for USB-A port step-down output, with a maximum output current of 4A.
Silijie SY8104 data information.
Close up of 4R7 step-down inductance.
Two Dongyuan FKBB3103 are used for power supply switching of USB-A.
Disassembly summary of charging head network
RAVPOWER mobile power supply adopts PC flame-retardant material shell, with polished surface and round corners.Even if the capacity reaches20000mAhThe volume is still very small, so it is more convenient to carry when traveling.The product supports Apple 2.4A, QC, and PD protocols. The USB-C port has five fixed voltage ranges of 5V3A, 9V3A, 12V3A, 15V3A, and 20V3A. The 60W fast charge can meet the fast charge requirements of equipment in long-distance travel.
Through disassembly, the charging head network learned that this product is designed with a long PCB board inside and placed on one side of the body, effectively compressing the size of the product.The lithium battery protection circuit on the PCB is composed of Seiko S8254AA and Dongyuan MOS. In addition, a thermistor is also provided for temperature control.1A1CThe two circuits raise and lower the voltage independently, of which the USB-C port uses Core Sea Technology CS32G020K8U6 for protocol identification, and the Nanxin SC8812A with Wandai MOS to raise and lower the voltage to achieve fast charging input and output;The USB-A port step-down output is completed by Silijie SY8104.