8.2.6 Voltage Tracking

The DNM/DNL family was designed for applications that have output voltage tracking requirements during power-up and power-down. The devices have a TRACK pin to implement three types of tracking method: sequential, ratio-metric and simultaneous. TRACK simplifies the task of supply voltage tracking in a power system by enabling modules to track each other, or any external voltage, during power-up and power-down.

By connecting multiple modules together, customers can get multiple modules to track their output voltages to the voltage applied on the TRACK pin.

Detailed Description

Sequential Implementation

Sequential start-up is implemented by connecting the power good signal (PWRGD pin) of PS1 to the TRACK pin of PS2 with a resistor–capacitor (RC) circuit. The power up and down that waveforms in Figures 4 and 5. In Figure 4, the 5V PS1 supply ramps up first. When supply reaches its final 5V steady state value, the open collector output of the PWRGD pin releases to the TRACK pin and the PS2 output voltage rises at the rate of the RC time constant. In Figure 5, the PWRGD pin pull low by PS1 ENABLE off or the PS1 output voltage is below 90% of the desired regulated voltage. The TRACK pin is pulled low and the PS2 power down. Figure 3 shows the circuit diagram of sequential start-up when VoPS2 tracks the PWRGD of PS1.

Vin

ENABLE

PS1

PS2

Vin

VoPS1

PWRGD

TRACK

R

ENABLE

C

VoPS2

Figure 3. PS1 and PS2 track output voltage Sequential start-up

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Delta Electronics DNM, DNL SIP Series manual Voltage Tracking, Detailed Description Sequential Implementation
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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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