The NB685 provides the highest density complete power supply for DDR3, DDR3L, LPDDR3, and DDR4 memory. It is a converter chip with high frequency, synchronous, rectification, step-down, and other characteristics. It is mainly used to repair the Antminer control board.
The NB685 operates highly efficiently over a wide output current load range based on MPS proprietary switching loss reduction technology and internal low Ron power MOSFETs.
Full protection features include OC limit, OVP, UVP, thermal shutdown, and over-temperature warning (OTW).
The converter requires a minimum number of external components and is available in a QFN 3mm * 3mm package.
Product features:
1. Wide 4.5V to 28V operating input range
2. Compatible for IMVP8
3. 135μA low quiescent current
4. 12A continuous output current
5. 13A peak output current
6. Selectable ultrasonic mode
7. Selectable 500k/700k switching frequency
8. Built-In +/- 1A VTTLDO
9. 1% Buffered VTTREF output
10. Adaptive COT for fast transient
11. DC Auto-tune loop
12. Stable with POSCAP and ceramic output capacitors
13. Over-temperature warning
14. Internal soft start
15. Output discharge
16. OCL, OVP, UVP, and thermal shutdown
17. Latch-Off Re-set via EN or power cycle
18. QFN 3mm * 3mm package