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Delta Electronics DNL SIP Series, DNM 20 K = 10.303 K Ω, PS1=5V PS2=3.3V, V=1.3V, 3.3 − 1.3, R1 =

Models: DNM DNL SIP Series

1 20

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For example, the PS1 Voset,PS1=5V, the PS2 Voset,PS2=3.3V, R1 is calculated as follows:

R1 =	[(3.3 − 1.3) − 1.32]	* 20K = 10.303K Ω
	1.32

PS1=5V

PS2=3.3V

-△V=1.3V

PS1

PS2

Figure 9. Ratio–metric tracking Power up

Figure 10. Ratio–metric tracking Power down

Simultaneous Implementation

Similar to the ratio-metric implementation, simultaneous tracking is implemented using a voltage divider on the TRACK pin. The objective is to minimize the voltage difference between the power supply outputs during power up and down. The waveforms of power up and down are showed in Figures 13 and 14.

For type A (DNXXX0A0XXXX A), the simultaneous tracking can be accomplished by connecting VoPS1 of PS1 to the TRACK pin of PS2. Figure 11 shows the circuit diagram of voltage Simultaneous start-up when VoPS2 tracks VoPS1 (only for type A).

Vin

PS1PS2

Vin

VoPS1

VoPS2

TRACK

ENABLE

Figure 11. PS1 and PS2 track output voltage Simultaneous start-up for type A

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Delta Electronics DNL SIP Series 20 K = 10.303 K Ω, PS1=5V PS2=3.3V, V=1.3V, Simultaneous Implementation, 3.3 − 1.3, R1 =

Contents

2.0 Relevant Documentation The Delphi DNM and DNL Series of SIP type POL converters1.0 Purpose Evaluation Procedure4.0 Equipment Set-Up and Description Figure 1. Set-up Diagram3.0 Equipment Required 5.0 Thermal Management of the Converter 6.3 Dynamic Characteristics 6.1 Input Characteristics6.2 Output Characteristics 6.0 Tests Performed7.2 Initial Power Up SW3 Function table8.1.1 Input Voltage Range and Under-Voltage Lockout 8.1 Input Characteristics8.0 Tests and Evaluation Test8.2.3 Output Ripple 8.2 Output Characteristics 8.2.1 Line Regulation8.2.2 Load Regulation Test10500 10500 Vo − 21070Vtrim = 0.7 − 0.1698 ⋅ Vout − 2 Output Voltage Set-Point Adjustment by external voltage sourceFor DNM04xx and DNL04xx series Vtrim = 0.7 − 0.1698 ⋅ 3.3 − 0.7525 = 0.267Vtrim = 0.7 − 0.0667 ⋅ 3.3 − 0.7525 = For DNM12xx and DNL12xx seriesVtrim = 0.7 − 0.0667 ⋅ Vout − 0.7525 8.2.5 Voltage MarginingFigure 3. PS1 and PS2 track output voltage Sequential start-up 8.2.6 Voltage TrackingDetailed Description Sequential Implementation Figure 6. PS1 and PS2 track output voltage Ratio-Metric start-up PS1 PS2Ratio-Metric Implementation PS1 PS2R1 = R1 =Vref 20 K = 55.75 K ΩV=1.3V 20 K = 10.303 K ΩPS1=5V PS2=3.3V Simultaneous Implementation1.32 0.480.72 PS1 PS2Test 8.3 Dynamic Characteristics 8.3.1 Output Voltage DeviationNotes on the use of Track function Vout8.3.2 Turn-On Response Time Test Turn on the module by using the external switchTest Turn on the module by using the Enable on/off Test7. Set the Time base to 2mS/Div 8.4. Thermal Characteristic 8.4.1 EfficiencyTest Appendix A- Evaluation Board Schematic Appendix C - Evaluation Board Layout Bottom View WarrantyAppendix B - Evaluation Board Layout Top View Europe

[(3.3 − 1.3) − 1.32]

* 20K = 10.303K Ω

PS1=5V

-△V=1.3V

Simultaneous Implementation