Chat

Welcome to Flux

Treat Flux like your intern. Tell it what you'd like to build and it'll get to work. You can also ask it questions, brainstorm ideas, and teach it your preferences. Learn More

Explain project
Write a project description
Find schematic issues
Create a test plan
Simulate a circuit
Prepare for Manufacturing
Component Selection Workflow
New Subsystem Wizard
Sign up to send
what tvs protection diode should I place between vbat and ground?
fedepaj

fedepaj

@copilot what tvs protection diode should I place between vbat and ground?
1y

copilot

When selecting a TVS (Transient Voltage Suppressor) diode for protecting the VBAT line, you should consider the following:
  1. Reverse Standoff Voltage ($V_{RWM}$): This should be slightly higher than the normal operating voltage of your VBAT line to avoid unnecessary clamping. For example, if VBAT is typically 5V, you might choose a diode with a $V_{RWM}$ of around 6V.
  2. Clamping Voltage ($V_{C}$): Ensure the clamping voltage is below the maximum voltage tolerance of your circuit components during a transient event.
  3. Power Rating: The diode should have a sufficient power rating to handle potential surges. For battery-powered devices, a rating of 600W to 1500W is common.
  4. Package Type: Choose a package that fits your PCB layout and thermal requirements.
Based on these considerations, a suitable example could be the SMBJ6.0A, which has:
  • Reverse Standoff Voltage: 6.0V
  • Clamping Voltage: 10.3V at Peak Pulse Current
  • Power Rating: 600W
  • Package: SMB (Surface Mount)
Be sure to verify the diode’s specification sheet to ensure it fits your specific requirements. Let me know if you need more information or guidance!
1y
fedepaj

fedepaj

the battery reaches its maximum at 4.2 volts
1y

copilot

In that case, you'll want to select a TVS diode with a reverse standoff voltage ($V_{RWM}$) slightly above 4.2V to ensure it doesn't trigger during normal operation. A common choice for such applications would be a diode with a $V_{RWM}$ of around 5V.
Here's a suitable example:
Recommended TVS Diode
  • Part Number: SMBJ5.0A
  • Reverse Standoff Voltage ($V_{RWM}$): 5.0V
  • Clamping Voltage ($V_C$): Approximately 9.2V at the peak pulse current
  • Peak Pulse Power Dissipation: 600W
  • Package: SMB (DO-214AA) for surface mounting
This diode should provide adequate protection against voltage transients, while keeping the normal operating voltage range of your battery circuit in mind. Make sure to review the diode’s datasheet to verify that it meets your specific application needs. Let me know if you need further assistance!
1y
fedepaj

fedepaj

it would be perfect but I need a more compact package
1y

copilot

For a more compact package, you might want to consider the SOD-323 package. It is much smaller and still provides sufficient transient voltage protection for many battery-operated applications.
Recommended TVS Diode for Compact Package
  • Part Number: ESD5Z5.0T1G
  • Reverse Standoff Voltage ($V_{RWM}$): 5.0V
  • Clamping Voltage ($V_C$): Approximately 9.8V
  • Peak Pulse Power Dissipation: Around 200W
  • Package: SOD-323
The ESD5Z5.0T1G provides a high level of ESD protection and is suitable for applications where PCB space is a constraint. Ensure that the clamping voltage and power rating are within acceptable ranges for your application. Always verify the specific requirements of your circuit and consult the datasheet for any additional details.
Let me know if this fits your needs or if you need further suggestions!
1y
fedepaj

fedepaj

but It has only 174 W, we need at lest 600w
1y

copilot

If you're looking for a compact TVS diode with at least 600W power dissipation, you might want to look for options in packages like SOD-123 or SMC, which offer a balance between size and power handling capabilities.
Recommendation: Part Number: SMAJ5.0A
  • Reverse Standoff Voltage ($V_{RWM}$): 5.0V
  • Clamping Voltage ($V_C$): Approximately 9.2V
  • Peak Pulse Power Dissipation: 400W
  • Package: SMA (DO-214AC)
Although the SMAJ5.0A is rated for 400W, ensure that your application requirements align with this rating as it is a trade-off between size and power capability.
For a higher power rating, consider the SMC package:
Part Number: SMCJ5.0A
  • Reverse Standoff Voltage ($V_{RWM}$): 5.0V
  • Clamping Voltage ($V_C$): Approximately 9.2V
  • Peak Pulse Power Dissipation: 1500W
  • Package: SMC (DO-214AB)
While the SMC package is larger than SMA, it offers a significantly higher power rating. Select the one that best fits your space and power requirements. Let me know if this meets your needs or if you have further constraints!
1y
1

No results...

Learn to Add a Component

TP5410 Module acsz

TP5410 Module acsz thumbnail
This project is a TP5410-based Battery Management System (BMS) circuit. The TP5410 IC handles battery charging, voltage regulation, and protection. It uses various capacitor, resistor, and diode components along with LEDs for status indication, making it an ideal solution for portable electronic devices. #project #Template #charger #reusable #module #batterycharger #template #bms #TP5410 #topPowerASIC #toppower #toppowerasic

Properties

creativecommons.org/licenses/by/4.0/

Pricing & Availability

Distributor

Qty 1

Controls