NCP1399AM NCP1399 Current Mode Controller for Avalon PSU repair
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NCP1399AM Current Mode Controller IC for Avalon Power Supply Repair
The NCP1399AM is a high-performance current mode controller designed for half-bridge LLC resonant converter topologies — the exact architecture used in Avalon mining power supplies. This IC integrates a 600V gate driver, reducing external component count and simplifying the PCB layout. When the original NCP1399 controller fails in your Avalon PSU, this replacement IC restores the resonant switching stage and brings the power supply back to full operation.
NCP1399AM Controller IC Specifications
| Parameter | Specification |
|---|---|
| Part Number | NCP1399AM |
| Type | Current Mode Controller for LLC Resonant Converters |
| Gate Driver | Integrated 600V high-side driver |
| Protection Features | OVP, OTP, OCP, undervoltage, open optocoupler detection |
| Application | Avalon mining power supply repair |
| Condition | Brand New |
| Weight | 2g |
How the NCP1399AM Controls LLC Resonant Switching
LLC resonant converters achieve high efficiency by operating near the resonant frequency of an LC tank circuit, enabling soft switching and minimal switching losses. The NCP1399AM drives this topology by modulating the switching frequency based on load conditions while maintaining zero-voltage switching across the operating range. When this controller IC fails, the entire resonant stage stops — the PSU produces no output. Symptoms include a completely dead power supply with standby voltage still present, indicating the control stage rather than the input stage has failed. Replacing the NCP1399AM IC is a targeted, cost-effective repair compared to replacing the entire PSU.
NCP1399AM vs. NCP1399AA: Which Controller IC Do You Need?
The NCP1399 family includes several variants with different pin configurations and feature sets. The NCP1399AM and NCP1399AA are the most common in mining PSU designs. Always check the original IC marking on your failed PSU board to confirm which variant is installed before ordering. Using the wrong variant can result in incorrect pin mapping and further damage to the power supply.
Related PSU Controller ICs and Avalon Repair Parts
- NCP1399AA Current Mode Controller for PSU Repair
- OB2268CP PWM Control IC for Whatsminer P222B PSU
- NCP1252ADR2G Current Mode PWM Controller
- UC2842B Current Mode Controller for Bitmain PSU
Get your Avalon power supply back online. Order this controller IC now or contact us at contact@lys-sz.com for technical support. Worldwide shipping available.
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