Hi team,
customer is asking which one is the right scenario using left or right land pattern,
what is the definition of HV/isolation ?
thanks
Hi.
The left side is the IPC-7351 layout option, which is a standard guidance for land patterns. In this option, the length of the pads is larger and the clearance between the two sides is <8mm. This option provides more soldering robustness that is beneficial for vibration and gives a better mechanical connection. This option does not meet the minimum clearance requirements for reinforced HV (high voltage isolation) isolation.
The ride side is the HV isolation option. In this case, the length of the pads is shorter and the clearance between the two sides is >8mm. This option meets the insulation specifications (Datasheet section 6.5 pg. 5) and therefore provides a reinforced isolation of 5000 Vrms for Viso (Withstand isolation voltage). This provides a very good insulation lifetime projection (Datasheet section 6.11 pg.9) which is attached.
Which is better depends on the application that you want to use this device.
HV isolation is a means of preventing DC and unwanted AC currents between two parts of a system, while allowing signal and power transfer between those two parts. Isolation is required in moder electrical systems for many reasons such as to preventing damage to expensive processors. Examples of applications that need isolation are industrial automation systems, motor drives, medical equipment, solar inverters, power supplies and hybrid electric vehicles. You can learn more about it in this white paper: High-voltage reinforced isolation: Definitions and test methodologies
Datasheet: UCC12050 High-Density, Low-EMI, 5-kVRMS Reinforced Isolation DC/DC Module datasheet (Rev. D)
