Mobile Phone 1S, 3.7V, 1.5A Flexible Circuit PCM Protection Module Board for Lithium-ion Battery Pack with NFC Communication

Digital Product Protection Board (FPC) Flexible Circuit PCM Protection Module Board for battery

● Working current: 0.5-5A, reaching 10A in an instant;

●Basic functions:

2 charging overvoltage protection 4.20V-4.465V, charging overcurrent protection, charging high and low temperature protection -20 degrees - +50 degrees;
2 discharge overvoltage protection 2.5V-3.0V, discharge overcurrent protection, discharge high and low temperature protection -20 degrees - +65 degrees;
2 short circuit protection;
2 secondary protection;
2 0V charging;
2 automatic sleep;


●Maximum imposition size: L (150mm) * W (135mm) * T (0.15mm);

●PCB type: FPC full soft board, soft and hard board, soft + hard board;

● Copper thickness 0.5OZ (18um), 1OZ (35um);

● Layer: double panel, four layer board (hard board)

●Ink color: butter, black oil, red oil

● Reinforcement method: FR-4, steel sheet, PI

● Pad processing: Shen Jin, OSP;

●With plastic rolled copper, no rubber rolled copper, rubberized electrolytic copper, glueless electrolytic copper

●Golden fingers: bright gold, semi-bright and half-dumb, full dumb gold;

●Applicable environmental requirements: ROHS, REACH, halogen-free, 7P;

●Applicable equipment: applications and mobile phones, tablets, MP3/MP4, digital cameras, Bluetooth headsets, motor drive boards, intelligent robots and other products.

FPC cable welding solution

Pulse welding machine (soldering) JYPC-3A inter-unit equipment

The main function of this machine is to weld flexible printed circuit, flexible flat cables and various flex cable, as well as various terminal cables. This machine is a rotary welding machine, which can be used alternately for two fixtures, which can save half of the time and improve work efficiency.The output of this machine is stable and adjustable. It is composed of SMC pneumatic components, which are precise and digitally displayed. The temperature and time parameters are input from the operation panel. The temperature setting range is 0-500 degrees, and the time setting range is 0-99 seconds. This is the three major elements of welding a product.

Product welding schematic:

Welding process:

Step 1: Put the product into the fixture and position it at the same time. 

Step 2: Press the two-hand system to start the welding

Step 3: Turn the turntable to the position of the weld and wait for the presser to press down. 

The fourth step: the welding head is pressed down, and the hair is heated. 

Step 5: Wait for the welding to complete and return to the first step.

Welded FPC Gold Pins Design Tips

There can be more than 100 circuits with thickness of 0.2mm in one fpc cable. Although it is more expensive than wire cables, it is widely used in compact smart hardware. Especially for mobile phones, smart watches and other scenes.Today’s topic is design skills of the welded FPC.

Double-sided gold finger + tin hole

We have to design double layer gold pins although they corresponds to only one layer of pad, .FPC is a non-metallic substrate with very slow heat transfer. If there is only one layer of gold pins, the heat transfer of the soldering iron can not be soldered when soldering by hand.Similarly, the tin holes on the pads are also designed to transfer heat and allow the molten solder to flow between the upper and lower layers.


Darlox combines business capabilities and industry chain upstream and downstream to provide customers with one-stop services from Schematic Design, PCB/FPC Fabrication, material purchasing, welding processing, packaging testing.

20TB hard drive launched before 2020 with glass substrate manufacturing

In the past few years, the hard disk density slowdown the growing speed. Although Seagate and the West continue to work hard, put more discs, use helium, continue to introduce a larger capacity hard drive, but the hard disk density to enhance the speed gradually slow down, it is an indisputable fact. Now West and Seagate are working hard on 20TB high-capacity hard drive which is manufactured with glass substrate.

So far, only the notebook hard drive using glass substrate. Compared with the aluminum plate glass has several advantages. First, the glass is stronger than aluminum, allowing manufacturers to put thinner and lighter discs. In addition, compared with the aluminum substrate, the glass substrate is more flat and more smooth, more closely together, when the heat expansion is much weaker, that is to say the ability to cope with thermal expansion stronger. Also, let the spindle press the glass plate at a given speed, the need for less power, if the use of aluminum discs, because of its weight heavier, so a little higher energy consumption.

Japanese company Hoya believes that HDD manufacturers will use glass in 3.5-inch hard drive. Hoya shows a prototype glass disc that has two thicknesses, one for 0.5 mm and another for 0.381 mm. Currently the disc thickness is 0.635 mm. There must be a gap between the disc and the disc. If the disc size is reduced by 40%, more discs can be loaded in the same capacity. The glass substrate facilitates the introduction of heat-assisted magnetic recording (HAMR). If you want to write data on the hard disk, the hard disk will heat the writing part with the laser. Seagate is ready to roll out HAMR drives in 2018 and expand capacity to 20TB by 2020.

Darlox’s producs: Flexible flat cables  FFC Cables  40P 0.5mm pitch LVDS FFC Cable

Wireless charging principle Detailed

Smartphones that support wireless charging are available from around the summer of 2011. Any handset device can use the global standard "Qi" specification. Parking can be charged EV (electric car) with the charging system.

Wireless charging has been in the electric toothbrush, electric shavers, wireless phones and other parts of household appliances in the practical, and now its scope of application has expanded to the field of smart phones.

At present, most of the smartphones and chargers that support wireless charging on the market are in line with the "Qi" specification developed by the industry-based "Wireless Charging Alliance (WPC)" in the United States.

Wireless charging methods include "magnetic resonance" and "radio reception" and other means, Qi is used "electromagnetic induction". By achieving standardization, as long as it is with Qi logo products, any handset device can be charged.

Darlox’s producs: Flexible flat cables  FFC Cables  40P 0.5mm pitch LVDS FFC Cable

1.27mm Ptch FFC cable

Advantage of 1.27mm pitch FFC cable are Small size, light weight, the design of the cable board is used to replace the larger wiring harness wire. In the current patch electronics assembly board, the insulation material FFC cable is usually to meet the miniaturization and mobility requirements Of the solution. By using the 1.27mm ffc cables, the total weight and volume of the cable is reduced by 70% compared to conventional round wire harness. The cable can also be increased by using the reinforcement material or liner method to obtain Additional mechanical stability.

When the circuit of the circuit is too complicated and the single layer board can not be routed or need copper foil for grounding shielding, you need to choose double or even multilayer fpc cable. Multilayer fpc cable have the holes connecting the layers of copper foil. This is a typical difference of single layer fpc cable .

Advantages and Disadvantages of Automotive FFC Cable

Automotive FFC cable including single-sided, double-sided and multi-layer board. The substrate based on polyimide CCL-based materials. Its advantage including high heat resistance, good dimensional stability, and good electrical insulation performance.

Automotive FFC cable shortcomings:

(1) high initial cost of a single time

Since the flexible PCB is designed and manufactured for special applications, the cost of the circuit design, wiring, and backplane is high.

(2) difficult changes and repair

Once the soft PCB is made, it must be changed from the bottom of the map or the preparation of the light painting program, so it is not easy to change its surface covered with a protective film, to be removed before repair, repair and then to restore, it is more difficult jobs.

(3) size is limited

It can not be done very long, very wide.

(4) can be damage easily when improper operation.

Improper operation of the installation can easy to cause damage to the soft circuit, the soldering and rework needs of trained personnel operation.

Advantages of automotive cable FFC cable:

(1) can be free to bend, winding, folding, according to the space layout requirements of any arrangement, and in any three-dimensional space to move and stretch, so as to achieve the integration of components and wire connections.

(2) the use of FPC can greatly reduce the size and weight of electronic products.

(3) FFC also has good heat dissipation and weldability as well as easy to install, the overall cost is low, the combination of soft and hard design to a certain extent make up for the flexible substrate in the component carrying capacity of a slight shortage.

Darlox’s producs: Flexible flat cables  FFC Cables  40P 0.5mm pitch LVDS FFC Cable