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22V Automotive Protection TVS SM8S22AG, Meet ISO7637-2 5a/5b and ISO 16750 Load Dump Test
DATASHEET: SM8SXXG Series_v2309.1.pdf
Features:
Optimized glass passivated chip.
TJ=175℃ capability suitable for high reliability and automotive requirement.
6600W peak pulse power capability with a 10/1000μs waveform, repetitive rate (duty cycle): 0.01 %.
Meet ISO7637-2 5a/5b and ISO 16750 load dump test (varied by test condition).
Meet AEC-Q101 qualified.
Low leakage current.
Low forward voltage drop.
Excellent clamping capability.
Very fast response time.
RoHS compliant.
Description:
The SM8S series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events.
| Part Number | Working Peak Reverse Voltage VRWM (V) | Breakdown Voltage VBR (V) | Test Current IT (mA) | Maximum Reverse Leakage IR @ VRWM (µA) | Maximum IR @ VRWM TJ=175℃ (µA) | Maximum Reverse Surge Current IPP (A) ① | Maximum Clamping Voltage VC @ IPP (V) | ||
| Uni | Bi | Min. | Max. | ||||||
| SM8S22AG | SM8S22CAG | 22.0 | 24.4 | 26.9 | 5.0 | 10 | 150 | 186 | 35.5 |
| SM8S24AG | SM8S24CAG | 24.0 | 26.7 | 29.5 | 5.0 | 10 | 150 | 170 | 38.9 |
| SM8S26AG | SM8S26CAG | 26.0 | 28.9 | 31.9 | 5.0 | 10 | 150 | 157 | 42.1 |
| SM8S28AG | SM8S28CAG | 28.0 | 31.1 | 34.4 | 5.0 | 10 | 150 | 145 | 45.4 |
| SM8S30AG | SM8S30CAG | 30.0 | 33.3 | 36.8 | 5.0 | 10 | 150 | 136 | 48.4 |
| SM8S33AG | SM8S33CAG | 33.0 | 36.7 | 40.6 | 5.0 | 10 | 150 | 124 | 53.3 |
| SM8S36AG | SM8S36CAG | 36.0 | 40.0 | 44.2 | 5.0 | 10 | 150 | 114 | 58.1 |
| SM8S40AG | SM8S40CAG | 40.0 | 44.4 | 49.1 | 5.0 | 10 | 150 | 102 | 64.5 |
| SM8S43AG | SM8S43CAG | 43.0 | 47.8 | 52.8 | 5.0 | 10 | 150 | 95.1 | 69.4 |
| SM8S45AG | SM8S45CAG | 45.0 | 50.0 | 55.3 | 5.0 | 10 | 150 | 90.8 | 72.7 |
| SM8S48AG | SM8S48CAG | 48.0 | 53.3 | 58.9 | 5.0 | 10 | 150 | 85.3 | 77.4 |
| SM8S51AG | SM8S51CAG | 51.0 | 56.7 | 62.7 | 5.0 | 10 | 150 | 80.1 | 82.4 |
| SM8S54AG | SM8S54CAG | 54.0 | 60.0 | 66.3 | 5.0 | 10 | 150 | 75.8 | 87.1 |
| SM8S58AG | SM8S58CAG | 58.0 | 64.4 | 71.2 | 5.0 | 10 | 150 | 70.5 | 93.6 |
| SM8S60AG | SM8S60CAG | 60.0 | 66.7 | 73.7 | 5.0 | 10 | 150 | 68.2 | 96.8 |
| SM8S64AG | SM8S64CAG | 64.0 | 71.1 | 78.6 | 5.0 | 10 | 150 | 64.1 | 103.0 |
| SM8S70AG | SM8S70CAG | 70.0 | 77.8 | 86.0 | 5.0 | 10 | 150 | 58.4 | 113.0 |
| SM8S75AG | SM8S75CAG | 75.0 | 83.3 | 92.1 | 5.0 | 10 | 150 | 54.5 | 121.0 |
| SM8S78AG | SM8S78CAG | 78.0 | 86.7 | 95.8 | 5.0 | 10 | 150 | 52.4 | 126.0 |
| SM8S85AG | SM8S85CAG | 85.0 | 94.4 | 104.0 | 5.0 | 10 | 150 | 48.2 | 137.0 |
Notes: 1. Surge current waveform is defined at 10/1000μS waveform. 2. For all types maximum VF = 1.8 V at IF = 100 A measured on 8.3 ms single half sine-wave or equivalent square wave, duty cycle = 4 pulses per minute maximum. | |||||||||
Application:
Automotive Protection.
Overview of circuit protection
Harmful electrical phenomena such as transient voltages or
electrostatic discharge (ESD) often occur in circuits. In order to
accurately protect IC circuits, TVS devices can be used in circuits
for overvoltage and electrostatic discharge protection. Transient
suppression diode (TVS), also called clamping diode, is a
high-efficiency circuit protection device commonly used
internationally. It can instantly absorb surge power up to several
kilowatts and withstand high-energy large pulses. Generally, TVS
tubes are connected in parallel in the circuit. When a large-pulse
surge occurs while the car is driving, it can respond within ms
level and quickly transform its high-resistance state into a
low-resistance state, thus allowing large The current passes
through and the voltage is clamped at a predetermined level,
thereby achieving the purpose of protecting the electronic circuits
of automotive electrical products. The automotive electronics
market will undoubtedly become the largest stage in the
semiconductor industry, and the Asia-Pacific region, especially the
Chinese market, has unlimited growth potential. Protection devices
used in automotive electronic circuits are also increasing with the
growth of automotive electronics. In recent years, various types of
equipment, no matter what field they are in, have tended to be
highly integrated and high-frequency designed, which has caused
manufacturers to put forward more and more performance requirements
for circuit protection solutions such as overvoltage/overcurrent
protection and surge suppression. increasingly stringent
requirements.
Precautions for selecting automotive TVS transient suppression
diodes in circuit applications
In the automotive electronic and electrical immunity standard
system, ISO10605 and ISO7637-2 are the two most important
standards. This article will introduce the parameters that need to
be considered when selecting a suitable TVS diode for automotive
electronics when meeting these two automotive test standards:
1. Vnom is the normal operating voltage of the circuit
2. Vmax is the maximum withstand voltage of the circuit
3. If the surge waveform is exponential/power type, there are many
related indicators.
1) Vs maximum surge voltage
2) Tp surge duration and level
3) Rs simulates the internal resistance of the surge generator
4) Number of waveform cycles (1/f)
4. If the surge is a DC waveform, you need to pay attention
1) Vdc DC surge voltage
2) Tp surge duration
3) Rs simulates the internal resistance of the surge generator
5. Consider the ambient temperature
6. Consider the package size of the protection device to be
selected.
7. If the circuit being protected is a digital signal circuit, the
following points should be considered:
1) Frequency of signal voltage
2) The rise and fall times of the surge signal waveform
3) The maximum capacitance size allowed by the circuit.
