Delta Electronics Comprehensive Guide to DNL Tracking Features in Power Supplies
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Notes on the use of Track function:

1.For proper voltage tracking, first, The ENABLE On/Off pin of the PS2 module is left unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules), so that the modules are ON by default and second applied input voltage to the PS1 and PS2. The TRACK pin is held at ground potential for duration of input voltage reaches its minimum input voltage (VIN,min) and then held for at least 10mS thereafter. This brief period gives the modules time to complete their internal soft-start initialization.

2.The PS2 output will not follow the PS1 voltage until the PS2 has completed its soft-start time. After this time, PS2 is capable of both sinking and sourcing current when following the voltage at the TRACK pin.

3.Notice that power down by removing the input voltage may not provide proper power tracking below under voltage lockout limit where the both integrated switches are off. So, using the ENABLE On/Off signal of PS1 for power down is the preferred option for power tracking.

4.The TRACK pin absolute maximum voltage cannot over the Vin.

5.For type A: When Tracking is unused, put R1 equal to 1KΩ and connect TRACK pin to +Vcc

For type C: When Tracking is unused, put R1 equal to 30.1KΩ and connect TRACK pin to +Vcc

Test

1)Put R56 to take the place of R1 on the POL evaluation board by use the value from above equation for different tracking purpose.

2)Use channel 1 and channel 2 measures the output voltage of PS1 and PS2.

3)Prepare turn on, disable remote On/Off of the PS1, enable remote On/off of the PS2, and supply input voltage to PS1 and PS2.

4)For the power on, enable switch on of PS1. In the meantime, to track power up by scope trigger function.

5)For the power down, enable switch off of PS1 to track power down.

6)Illustration of tacking features can be found in the section of Detailed Description.

8.3Dynamic Characteristics

8.3.1 Output Voltage Deviation

Output Voltage Deviation is defined as the response of the converter to a sudden step change in the output load current. The output voltage deviation is characterized by two parameters: Maximum Output Voltage Deviation and Response Time (please refer to the data sheet for the detailed specification). The value of dynamic resistance for a defined step current is defined as:

Rdynamic

=

Vout

0.5 * Imax

 

 

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Contents Purpose Delphi DNM and DNL Series of SIP type POL convertersRelevant Documentation Equipment Required Equipment Set-Up and DescriptionThermal Management of the Converter Tests Performed Test Set-UpInitial Power Up SW3 Function tableTest Tests and EvaluationNo Load Input Current Test Load Regulation Output Characteristics Line RegulationOutput Ripple 10500 For DNM04xx and DNL04xx series Vtrim = 0.7 − 0.1698 ⋅ Vout −For DNM12xx and DNL12xx series Voltage MarginingVoltage Tracking Detailed Description Sequential ImplementationPS1 PS2 Ratio-Metric ImplementationVref PS1=5VPS1=5V PS2=3.3V Simultaneous ImplementationVref definition Voset,ps2 Dynamic Characteristics Output Voltage Deviation TestTest Turn on the module by using the Enable on/off Test Turn on the module by using the external switchTurn-On Response Time Thermal Characteristic Efficiency Appendix A- Evaluation Board Schematic Warranty

DNM, DNL SIP Series specifications

Delta Electronics has long been recognized as a leading provider of power and thermal management solutions, and their DNL SIP Series and DNM series converters are exemplary products that exemplify the company’s commitment to innovation and efficiency. Designed specifically for industrial applications, these power supplies offer a range of features that cater to the demands of modern electronic systems.

The DNL SIP Series is a highly integrated, compact power converter that provides a reliable solution for various applications, including communication equipment, industrial automation, and IoT devices. One of its standout features is its high power density, which allows for a significant reduction in space requirements without compromising on performance. This is particularly advantageous in applications where space is at a premium.

Another important characteristic of the DNL SIP Series is its wide input voltage range, accommodating different operating environments and ensuring versatility across diverse applications. The series also boasts high efficiency ratings, often exceeding 90%. This high efficiency translates into reduced energy consumption, lower operating costs, and less heat generation—factors that are crucial in both environmental sustainability and system longevity.

On the other hand, the DNM series is tailored for more demanding applications that require robust performance in even harsher conditions. This series blends advanced technology with an expanded thermal management system, allowing for operation in extreme temperatures and ensuring reliability in challenging environments. The DNM’s rugged design not only enhances its durability but also contributes to user safety, featuring protections against over-voltage, over-current, and short circuits.

Both the DNL SIP and DNM series leverage Delta Electronics’ cutting-edge manufacturing processes and adherence to international safety standards. This ensures that their products meet rigorous quality controls and are certified for use in a variety of industrial settings. Integration with communication protocols and smart features allows for quick diagnostics and monitoring, enabling users to optimize performance and address issues before they escalate.

In summary, Delta Electronics’ DNL SIP Series and DNM converters stand out due to their compact design, high efficiency, wide input voltage range, and robust protection features. They cater to a wide array of industrial applications, making them an excellent choice for engineers and designers seeking reliable power solutions in an increasingly complex electronic landscape.
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