Other Parts Discussed in Thread: SN6507DGQEVM, LM25180, LM5180, UCC12050, LM25184
Hello,
I am currently evaluating the SN6507-Q1 for an isolated power supply design. After reviewing the documentation, I would like to confirm the actual output current capability of this device.
- According to the SN6507-Q1 datasheet (Section 6.3 Recommended Operating Conditions and Section 6.5 Electrical Characteristics), the device is specified for up to 0.5 A continuous current per switch (Isw1/Isw2) when VCC is between 6 V and 36 V, with a programmable current limit (RILIM) that can reach up to 1.6 A peak.
- The SN6507DGQEVM User’s Guide (Section 2 Overview and Section 3 EVM Setup and Operation) also states that the evaluation module is intended for isolated outputs up to 500 mA, and warns that exceeding this value may damage the EVM.
Based on this, my understanding is that the practical continuous output current on the secondary side is limited to around 500 mA, depending on the transformer and rectifier configuration.
My question is:
- Is the SN6507-Q1 inherently limited to ~500 mA output current, or are there recommended configurations that could allow achieving 1 A continuous isolated output?
- If 500 mA is indeed the maximum practical limit, what alternatives from TI would you recommend for reaching 1 A isolated output? For example:
- Higher-power regulated flyback controllers such as the LM5180/LM25180 family (as listed in SLOA327A, Table 1).
- Push-pull controllers with external MOSFETs that can handle higher current.
- Fully integrated isolated power modules (e.g., UCC12050, ISOW784x) that provide higher output current with reinforced isolation.
Thank you in advance for your guidance.
Best regards,
Sebastián Cardona
