When selecting a DC-DC power module, output power, output voltage, operating temperature range, and reliability grade are the first core factors to determine. The Z28 series quarter-brick modules from ZITN Power offer multiple models covering different power levels and output voltages, suitable for various application scenarios. Based on the series datasheet, this article provides a selection analysis from the two dimensions of power rating and operating temperature.
First, the Z28 series can be divided into two major power platforms: the 300W/330W platform and the 160W platform. The 330W platform includes the Z28Q12M330NNA (12V/27.5A), Z28Q24M330NNA (24V/13.8A), and Z28Q28M330NNA (28V/11.8A), while the Z28Q05M300NNA (5V/60A) has a rated power of 300W. Both platforms adopt the standard quarter-brick package with consistent pin assignments, offering pin-to-pin compatibility. The 160W platform includes models such as the Z28Q05T160TNA (5V/32A) and Z28Q24T160TNA (24V/6.7A).
The primary distinguishing criterion in selection is the operating temperature range. Models in the 330W/300W platform contain the letter "M" in their part number and have an operating case temperature range of -55°C to +100°C, making them suitable for applications with stringent temperature requirements, such as outdoor base stations, on-board equipment, or industrial control sites. The 160W platform models contain the letter "T" and have an operating case temperature range of -40°C to +100°C, suitable for standard industrial-grade applications. Designers should choose M-grade or T-grade products based on the actual thermal environment and reliability needs of the system. Although the two platforms share the same pin assignments, they are not interchangeable beyond their respective rated temperature ranges.
Second, select output voltage and current according to load requirements. The Z28 series offers multiple output voltages from 5V to 50V. For digital circuits requiring high current and low voltage (such as FPGA or ASIC core voltages), the Z28Q05M300NNA (60A) or Z28Q05T160TNA (32A) are suitable choices. Note that the maximum output power of the 5V output modules is limited to 300W or 160W, not solely current-limited. For intermediate bus voltage applications at 12V, 24V, or 28V, the 330W platform offers higher power density. For higher voltage applications such as 36V or 50V, the Z28Q36M300NNA (36V/8.4A) and Z28Q50M300NNA (50V/6A) provide 300W of power.
Additionally, the input voltage range is consistent across all models: 16V to 40V for continuous operation, with a 50V/1s transient withstand capability. This means that modules with different output voltages can share the same input bus in a system, simplifying power architecture design. All models feature negative logic enable control and output voltage trim capability. The M-series platform offers a wider trim range (50%-110% of Vo), while for the T-series platform, the 5V model trim range is 80%-110% and the 24V model is 50%-110% – design engineers should take note of these differences.
Finally, protection features are also a point of comparison in selection. All models include input undervoltage lockout, output overcurrent, short-circuit, overvoltage, and overtemperature protection. However, there are differences in details: for example, the Z28Q05M300NNA explicitly enters "hiccup" mode after output overcurrent, with automatic recovery once the fault is removed; the Z28Q05T160TNA has the same characteristic. For applications requiring high capacitive load capability, the 5V/60A model supports up to 30,000μF, while the 50V/6A model supports only 500μF – this is directly related to output voltage and feedback loop design.
In summary, the selection process for the Z28 series can follow the path below: first, choose the M-grade (-55°C) or T-grade (-40°C) platform based on the system's operating environment temperature; second, select the specific output voltage and current model according to load power and voltage; finally, verify that secondary parameters such as capacitive load capability, trim range, and dynamic response meet design requirements. This series is compatible with similar products from SYNQOR. Please feel free to contact us for any needs.
