1. Primary side protection of automotive power supply
2. ESD Protection
● CAN, FlexRay, LCDS Interface Protection
● NFC antennas
● Digital and analog I/O
● RS-232 and RS-485
● USB2.0 and USB 3.0
Primary Side Protection of Automotive Power Supply
Automotive electronic products such as electronic control units, sensors and entertainment systems are connected to a power source. The power source of these electronic products is a battery or a generator. Due to the influence of temperature, working conditions and other conditions, the output voltage of the battery or the generator is unstable.
In addition, automotive systems that use electromagnetic loads such as fuel injection, valves, motors, electricity, and hydrolysis controllers introduce ESD, spike noise, and several transient and surge voltages into power and signal lines.
When the engine is running and the generator is delivering current to the power cord of the car, if the battery is suddenly disconnected, the most serious inrush current will be generated. This situation is also called "load dump". Most car manufacturers and industry organizations have specified the maximum voltage, line impedance, and duration in this load dump situation.
Into the high power TVS is used to protect easily damaged circuits from electrical overstress and ensure high reliability. For primary protection, TVS should absorb the high energy in the case of load dump. YINT's SM8 series is suitable for such situations.
Take the 14V power system as an example:
| Part number | VR | VBR | IT | Max reverse leakage | Ipp | VC |
| SM8S24 | 24 | 26.7-32.6 | 5mA | 10uA | 153 | 43 |
| SM8S24A | 24 | 26.7-29.6 | 5mA | 10uA | 170 | 38.9 |
ESD Protection
For many years, ESD protection has been a topic of concern for electronic system design. At present, with the miniaturization and high integration of products, the threat of ESD damage has become very important, so the ESD protection level in electronic design has become a Issues that must be considered.
Adding ESD protection to the system is also a low-cost, simple way to prevent some problems in the product life cycle: If there are hidden ESD hazards in the system, it may reduce the product life,cause product failures, failures, and increase The after-sales cost of the product may cause product recalls and damage the company's reputation when serious.
YINT can provide more than hundreds of ESD protection programs and program combinations. This application guide covers automotive and industrial applications. For more information, please visit our official website http://www.yint.com.cn/cn/
CAN
YINT's solution can protect the CAN bus from ESD and other transient damage
Part number | VRWM | IR(µA) | VBR | IT(mA) | IPP(A) | Ppk(W) | C(pF) | Package | IEC6100-4-2 |
ESDLC 24VAP | 24 | 1 | 26.7 | 1 | 5 | 300 | 60 | SOT-23 | Air 15KV |
ESDLC 24VD3B | 24 | 1 | 26.7 | 1 | 5 | 350 | 0.4 | SOD323 | Air 15KV |
FlexRay
YINT's solution can protect the Flexray bus from ESD and other transient damage, and meet the Flexray 10M/s transmission rate, and can absorb 300W of 8/20 μs surge energy.
Part number | VRWM | IR(µA) | VBR | IT(mA) | IPP(A) | Ppk(W) | C(pF) | Package | IEC6100-4-2 |
ESDLC 24VAP | 24 | 1 | 26.7 | 1 | 5 | 300 | 60 | SOT-23 | Air 15KV |
ESDLC 24VD3B | 24 | 1 | 26.7 | 1 | 5 | 350 | 0.4 | SOD323 | Air 15KV |
CAN
ESD0524P is specially designed to protect the high-speed interfaces such as LCDS, HDMI and display port of the in-car network to avoid ESD damage.
It has the characteristics of convenient design and parasitic capacitance.
Part number | VRWM | IR(µA) | VBR | IT(mA) | IPP(A) | Ppk(W) | C(pF) | Package | IEC6100-4-2 |
ESD0524P | 5 | 1 | 6 | 1 | 5 | 150 | 0.35 | DFN-10- 2.5*1.0*0.6 -0.5 | Air 15KV |
NFC antennas
NFC is a short-range, high-frequency radio technology that operates at a distance of 20 cm at 13.56MHz. Usually in NFC design, the NFC antenna is connected to the NFC control IC through a small contact, and these contacts are easily damaged by ESD, which can lead to the failure of the control IC, so it is strongly recommended to adopt the audio solution.
Part number | ESD0402/18P080 | ESD0402/24P080 |
| VRWM | 18 | 24 |
| IR(µA) | 1 | 1 |
| VC | 65 | 80 |
C(pF) | 0.8 | 0.8 |
| IEC61000-4-2 | air 15kV | air 15kV |
Digital I/O
There are many ways to protect digital I/O ports. Since it is not a high-frequency interface, low capacitance is not necessary. You only need to consider one-way and two-way, several lines need protection, and packaging issues.
| Part number | VRWM | IR(µA) | VBR | IT(mA) | IPP(A) | Ppk(W) | C(pF) | Package |
| ESD5V0D5/B | 5 | 0.08 | 6.2 | 1 | 9.4 | 174 | 80 | SOD523 |
| ESDLC3V3D3/B | 3.3 | 1 | 5.1 | 1 | 30 | 350 | 0.4 | SOD323 |
| ESD5V0AP/B | 5 | 1 | 6 | 1 | 24 | 300 | 200 | SOT-23 |
| ESD5V0D3/B | 5 | 1 | 6.2 | 1 | 24 | 350 | 350 | SOD323 |
| ESDLC5V0D3/B | 5 | 1 | 6.2 | 1 | 24 | 350 | 0.4 | SOD323 |
| ESD5V0D9 | 5 | 1 | 6 | 1 | 88 | 102 | 30 | SOD923 |
| ESD5V0L4 ESD5V0J4 | 5 | 5 | 6 | 1 | SOT-553 SOT-353 | |||
| ESD5VM5 ESD5VK5 | 5 | 5 | 6 | 1 | 12.5 | SOT-563 SOT-363 |
Analog I/O
ESD for analog signals has the following requirements: high turn-off voltage, low leakage current, and finally packaging requirements.
| Part number | VRWM | IR(µA) | VBR | IT(mA) | IPP(A) | Ppk(W) | C(pF) | Package |
| ESD36VD3/B | 36 | 1 | 40 | 1 | 4 | 350 | 40 | SOD323 |
| ESD24VD3/B | 24 | 1 | 26.7 | 1 | 5 | 350 | 60 | SOD323 |
| ESDLC24VD3/B | 24 | 1 | 26.7 | 1 | 5 | 350 | 0.4 | SOD323 |
| ESD24VAP | 24 | 1 | 26.7 | 1 | 5 | 300 | 60 | SOT23 |
| ESD36VAP | 36 | 1 | 40 | 1 | 4 | 300 | 40 | SOT23 |
| ESD24VD5/B | 24 | 1 | 26.7 | 1 | 3 | 200 | 25 | SOD523 |
RS-232 and RS-485
YINT provides a variety of products that can well protect RS-232 and RS485 interfaces.
As shown in the figure on the right, ESD15VAP is used for unidirectional protection and ESD12VAPB is used for bidirectional protection. The added resistance can further limit the current entering the transceiver.
| Part number | VRWM | IR(µA) | VBR | IT(mA) | IPP(A) | Ppk(W) | C(pF) | Package |
| ESD15VAP | 15 | 1 | 16.7 | 1 | 10 | 300 | 80 | SOT-23 |
| ESD12VAPB | 12 | 1 | 13.3 | 1 | 12 | 300 | 100 | SOT-23 |
USB2.0
The characteristic of the USB2.0 standard is that the maximum signal transmission speed is 480Mbit/s, which is currently the most common interface. The picture on the right is the electrostatic protection scheme of YINT's USB2.0 bus.
| Part number | VRWM | IR(µA) | VBR | IT(mA) | IPP(A) | Ppk(W) | C(pF) | Package |
| ESDSR05-4 | 5 | 1 | 6 | 1 | 12.5 | 500 | 2.5 | SOT23-6L |
USB3.0
USB3.0 is also considered as Super Speed USB, 5Gbps full duplex, ultra-high speed and line impedance limitation, it is a challenge to not only have no effect on the signal, but also to achieve ESD protection.
YINT's ESD0524P is specially designed for this purpose. The precise clamping voltage, low parasitic capacitance and superior performance are your ideal choice.
| Part number | VRWM | IR(µA) | VBR | IT(mA) | IPP(A) | Ppk(W) | C(pF) | Package |
| ESD0524P | 5 | 1 | 6 | 1 | 5 | 150 | 0.35 | DFN-10-2.5*1.0*0.6-0.5 |
