Mese: gennaio 2021

The USB will enter a suspend mode when there is no data

The previous article Wholesale DIN 41612 Connectors provides more detailed information, and also provides the OVLO and UVLO parameter values compatible with the wall adapter power supply. Figure 4: The soft-start process of the OVP device that overcomes the surge Even if the Vusb or wall adapter rapid output rise (hot plug) occurs, no voltage spike is observed at the Vout end of the device, thanks to the 4ms soft-start control. In order to save power,

the USB will enter a suspend mode when there is no data traffic. OVP devices are needed to overcome this problem. In order to provide a higher level of protection, overcurrent protection (OCP) features can be added to these devices.675V, which can effectively protect the downstream system to withstand a voltage of 6V, and the Vusb ripple voltage can reach 5. The typical value of 700ns/maximum value of 1.

The OVLO level must be higher than the maximum operating output voltage of Vbus (5.25V. This special sequence runs through the gradual ascent of the PFet gate, see Figure 4. A 1μF ceramic capacitor is enough to solve this problem. How to design the USB current capability is 100mA in normal mode (unconfigured mode), but up to 500mA in configured mode. Electrical characteristics and protective measures

Downstream systems connected via USB can be powered by multiple types of hosts. When the Vbus power supply is used to charge the lithium-ion battery (in most cases, the maximum rated voltage is The voltage is 7V or 10V) can also be connected to the input pin of the charger. Figure 5: NCP360 has a very fast turn-off time. When connecting a standard USB source device such as a personal computer (PC),

The dual-pole design allows multiple connectors to be on

Fourth: Robust wholesale DIP Switches In the ERNI connector series, the double-pole design idea is consistent throughout. It is suitable for the design of monitors and LED lights. The positive lock is designed for strong vibration applications. If the welding bracket, the hole (microhole) of the surface mount pin, and the large solder pad are superimposed, the holding force can be improved. Incorrect selection and use of connectors can cause system failures, product recalls, product liability cases, circuit board damage, rework and repairs, which in turn will cause loss of sales and customers.

The dual-pole design allows multiple connectors to be on one circuit board without plugging or short circuit problems, and there is no need for a large number of signals on a single connector. Product design engineers not only need to pay attention to chip technology, but also need to pay attention to the selection of peripheral devices, so as to get the best performance of the system. Especially suitable for inkjet printer controller, Interface Module module interface, etc. Obviously, the importance of choosing a suitable connector for electronic devices. For SMT products,

it is generally believed that the holding power on the board is poor. With the miniaturization of automotive electronics and consumer electronics, the design concept of high current and small spacing needs to be considered. Second: No bent pin design during assembly. Third: Surface mount design with high retention force. ERNI uses direct stamping of the corners, stamping terminals can avoid capillary cracks caused by the bending process, and ensure a complete electromechanical connection. For example, in the design of X-ray machines, ultrasonic scanners, and robotic Ethernet switches

. The 100% surface mount pin coplanarity test ensures the reliability of the circuit board assembly process, ensures good soldering, improves the product quality rate, and reduces the cost. This can be vividly compared to ‘take roots’. Is the retention force of PCB with surface mount termination lower than that of through-hole termination? The answer is: not necessarily. It is very suitable for automotive and subway applications.