Disassembly report: JLAB EPIC AIR Radio Sports Headphones
JLAB AUDIO is a headset brand in the United States. Founded in 2005, its sports earphone products are favored by foreign users.
Today, I love the audio network to dismantle JLAB EPIC AIR, which is a true wireless sports headset, which is self-contained, while ensuring wearing stability while also as a Bluetooth antenna, improve the intensity of sending and receiving Bluetooth signals. Headphones support IPX5 waterproof and anti-sweat, support touch control, single battery 6 hours, charging box can provide additional 30 hours of battery life, and can charge other devices.
Let’s take a detailed dismantling of my love audio network to see how this “The fastest company” of this “The fastest company” is designed.
First, JLAB EPIC AIR Radio Sports Headphones Unpacking
The upper part of the box is transparent, all-round display headphones; the lower half is a blue background, the product model “JLAB EPIC AIR True Wireless Sports Headphones”, the bottom is the five major features, 36 hours, life, hanging ear safety wear , IP55 dust-proof waterproof, multi-function charging box, support voice assistant wake up.
The back of the box further introduces the function of the headset and the charging box, the charging cassette can be charged at least 4 times. The following five words mainly introduce long battery, support Bluetooth 4.1 and APTX coding, 8MM dynamic unit, comfortable to wear and wake up mobile phone voice assistants.
The side of the box is the legend of the products and accessories, there are some interesting designs, which will be described in detail below.
The bottom information of the box is similar to the above content.
List of packaging items.
Seven pairs of additional silicone earplugs, size, depth, to meet different people’s wearing habits. The partial earplugs have a brand of LOGO.
The charging box looks more design, with a JLAB brand logo, below is a button and power indicator area.
Charging box bottom information, earphone input: 5V⎓100mA, charging box input: 5V⎓500mA.
The charging box power button and the electricity indicator area, the lid is relatively thin, which can light, the physical buttons, and the indicator.
There is a hinged rope hole on one side of the housing.
The front of the charging box is actually hidden with a charging line, and the brand name and LOGO are printed.
The two interfaces of this charging line can be seen from the back of the charging box.
Remove this charging cable, surrounded by the side of the charging box, the design is very clever.
Remove the charging box, expose the interface and output interface.
The inside of the charging wire is a serrated shape, which should be in order to increase the friction, and it is not easy to fall off on one side of the charging box.
The charging line is a USB-A to Micro-USB interface, which can be charged to the charging box or charged with the charging box.
The interface hidden on the front of the charging box, the left side is the power input interface of the charging box, and the right side is the power output interface of the charging box.
Turn on the charging box, there is a reminder sticker, the earphone ear is integrated, do not change the shape at will.
Charging cockpit show.
The button and power indicator on the inside of the charging box.
The headset is located in the state of the charging box.
JLAB EPIC AIR Radio Sports Headphones and Charging Boxes.
Headphones and charging boxes: 160 grams, comparable to a mobile phone.
Charge box single weight, 140.4 grams.
The left and right headphones have a total of 19.5 grams.
I love Xi frequency network using the Chargerlab Power-Z KT001 portable power tester to make a wire charging test on JLAB EPIC AIR, and the charging power is approximately 3W.
The maximum voltage of the charging box output is 5V and the maximum current 1A.
Second, JLAB EPIC AIR Radio Sports Headphones Charging Box Disassembly
After a new box, we have learned a detailed understanding of the appearance of the charging box of JLAB EPIC AIR, and the charging line is hidden on the side of the fuselage, and the design of the charging interface is relatively clever. Let’s first dismantle the charging box to see how its charging and boost circuit are designed.
Tear the anti-slip mat of the bottom of the charging box, you can see the fixed screw of the charging box.
Remove the screw, open the charging cartridge bottom cover, you can see the internal circuit.
Charging box circuit list.
There is a buffered camp at the USB-A output interface.
Remove the motherboard, the indicator light on the housing opens.
Motherboard front circuit.
The motherboard back circuit.
The JLAB EPIC AIR charging box is equipped with a Micro-USB power input interface and a USB-A output interface. The motherboard circuit is very streamlined, which is mainly due to the integrated IC of the lower left corner.
The English core IP5305 is a power management chip specifically designed for TWS Bluetooth headset charging box. It can monitor 5mA level current, which is an integrated boost converter, lithium battery charging management, and battery power indicated multi-function power SOC.
The British core IP5305 supports 1A synchronous boost conversion, 1.2A synchronous switch charging, boosting efficiency is as high as 91%, charged efficiency up to 93%, and built-in power management path, support side charge. The IP5305 has output overcurrent, overvoltage, short circuit protection, input support overvoltage, overcharge, overprofake protection, and whole machine have over temperature protection.
The chip has a high intensity and rich function. Only a small amount of peripheral devices are used in use, and the size of the overall solution can be effectively reduced to reduce the BOM cost.
British core IP5305 detailed information.
The headphones use a cylindrical lithium battery, and there is a layer of insulating plastics in the outer bag. The battery is from Cel Jinsaier, model 18650, capacity 2600mAh.
Before the pressurized current enters the battery, it is also necessary to pass the protection circuit consisting of the battery protection plate.
Information on the battery cell.
The solder joint of the headset charge the headphone and full of round.
The current is boosted after the current is boosted for the earphone and other devices on the circuit.
Gold plated roller charged with headphones.
The micro button used to display electricity.
LED indicator close-up.
PCB applied auxiliary heat dissipation on the back of the power management chip.
Second, JLAB EPIC AIR Headset Disassembly
After the above dismantling, we can see that the internal circuit integration of the JLAB EPIC AIR charging box is high. Below we start to disassemble the headphones, the ear hanging section of the JLAB EPIC AIR headset can also be used as a Bluetooth antenna, let’s see how it is designed ~
The headphones are in the ear design, the ear hung is a silicone material, and the housing has a brand LOGO.
The end of the ear is a hollow portion, and the inside is printed with the left and right identification.
There is a key to the headset on the inner side housing in the headphones, and next is two charging contacts.
The headphone housing supports touch, adjusting the volume, cut song, wakes up the voice assistant, etc., the factory has a film.
The indicator light on the housing opens.
Dust net in the outlet.
The earphone is removed along the mold line, and the speaker unit can be directly seen, and the plastic material of the housing is also translucent.
Speaker unit closeup.
The speaker size is about 8 mm.
The internal layout of the left and right headphones is not consistent.
A copper column charged to the headset battery receives the current from the charging cartridge.
On the left is the wire of the motherboard to connect the speaker, the rightmost side is the key to the headset.
Battery protection tubes and battery protection ICs provide an overpriced protection for batteries in headphones.
The lower side of the PCB is a built-in battery of the headset, and there is a shrapnel on the PCB board.
Remove the internal circuit of the headset, the two circular PCB boards are connected through the cable, and a buckle battery is sandwiched in the middle. The black is a Bluetooth antenna, which is placed in the earphone, increasing the area of the Bluetooth signal.
Ear pending and headphones are fixed with glue, and the interior is Bluetooth antenna.
The antenna diarront is approximately 9 cm.
The inner side of the earphone housing has a hidden opening and dustproof net of the microphone, indicator light opening, and a touch sensitive patch.
Remove the capacitive touch sensitive patch, the middle is the solder joint connecting the motherboard.
The inner circuit of the headset is contrast to the size of a dollar coin.
The PCB board (left) on the outside of the headphones is the main circuit. The back is a buckle battery of the headset. The red wire is connected to touch the patch; the PCB plate (right) on the inside of the headphones is a charge and discharge protection circuit, a wire connection speaker.
“Hamburger” structure, the intermediate layer is a battery.
Metal shrapnel B- connecting the battery.
The buckle battery comes from the Varta Valta, the model CP1654 A3, the voltage is 3.7V, and the capacity is 0.4Wh. According to my love, I have a large number of world-renowned brands, including Apple, Samsung, Sony, Bose, B & O, Amazon, etc., are currently available in Valta buckle batteries.
There is no component on the back of the PCB of the battery.
Finally, look at the layout of the headphones main circuit, two LED indicators, and the outer ring has foam to prevent leakage.
There is a protective cover on the microphone, reinforced outside, enhances sealing and pickup ability.
Radulated MEMS Silicone.
The main control chip of the headset is Qualcomm CSR8670, which is a powerful, flexible, integrated wireless audio solution. It supports up to 6 digital microphones and capacitive touch controllers, which can be used to develop a variety of consumer audio equipment; reducing the demand for external passive components, QUALCOMM CSR8670 can save up to 60% of printed circuits for producers Board space to achieve minimum production costs.
The CSR8670 uses embedded flash, enabling OEM vendors to develop their own custom software and custom software design to develop their custom software and uniquely featured products using CSR software development kits, CSR Extension partner programs, and custom software design. In addition, the CSR8670 includes a charging function without configuring an external charging IC.
According to my love, the company has learned that Bose, Sony, Wan Mode, Wushu, Vivo and other brands have a large number of high-pass schemes.
Gao Tong CSR8670 Data Map.
Decomposition of the family portrait.
I love sound network summary
JLAB EPIC AIR Radio Sports Headphones, the design of the charging box is relatively unique, the power cord can be placed on the side of the housing, and block the charging interface, it looks like an elliptical mobile power supply. In the actual situation, the charging box inputs the power supply in a Micro-USB interface, and a USB-A port output, the output power is up to 5W, and other equipment can be urgently powered.
The internal circuit integration of the charging box and the headset is relatively high. The charging box uses the English-core IP5305 power management chip, integrated boost converter, lithium battery charging management, battery power instructions, etc., has overcurrent, overvoltage, short circuit protection, input support, overcharge, over Protection, high integration, only a small amount of peripheral devices in use. The charging box uses a cylindrical lithium battery, model Cel Kelle 18650, capacity 2600mAh.
The Bluetooth master chip of the headphones part is a high-pass CSR8670, which is also a solution that has more functions and high integration. It built-in capacitive touch controller, with embedded flash, including charging, no need to configure external charging IC, can save circuit board space. The headphones use Valta’s buckle battery with a capacity of 0.4WH; a touch scheme is a capacitive; the Bluetooth antenna used for transceiving signals is long, embedded in silicone earplugs, increasing the transmission and reception area, and the design is smart.
JLAB EPIC AIR True Wireless Sports Headphones High Circuit Integrated Circuits, Reasonable Design. It is only necessary to manually boot, the headphones are divided by the headphones, the phone and WeChat voice only have sound, which is a TWS true wireless sports headset that is really wirelessly launched. It can be understood.