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Delta Electronics 10A manual Sequential Start-up, Simultaneous, Feature Descriptions Con, PS1PS2

Models: 2.8-5.5Vin 0.75-3.3V 10A

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FEATURE DESCRIPTIONS (CON.)

Sequential Start-up

Sequential start-up (Figure 40) is implemented by placing an On/Off control circuit between VoPS1 and the On/Off pin of PS2.

Vin

On/Off

PS1

PS2

	Vin
VoPS1	R3
	R3
	On/Off
R1
	Q1
R2	C1

VoPS2

Simultaneous

Simultaneous tracking (Figure 41) is implemented by using the TRACK pin. The objective is to minimize the voltage difference between the power supply outputs during power up and down.

The simultaneous tracking can be accomplished by connecting VoPS1 to the TRACK pin of PS2. Please note the voltage apply to TRACK pin needs to always higher than the VoPS2 set point voltage.

Vin

PS1PS2

Vin

VoPS1

VoPS2

TRACK

On/Off

DS_DNM04SMD10_07162008

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Delta Electronics 10A, 0.75-3.3V, 2.8-5.5Vin manual Sequential Start-up, Simultaneous, Feature Descriptions Con, PS1PS2

Contents

Delphi DNM, Non-Isolated Point of Load DC/DC Power Modules 2.8-5.5Vin, 0.75-3.3V/10AoutFEATURES OPTIONSTECHNICAL SPECIFICATIONS INPUT CHARACTERISTICSOUTPUT CHARACTERISTICS DYNAMIC CHARACTERISTICSELECTRICAL CHARACTERISTICS CURVES ELECTRICAL CHARACTERISTICS CURVES Figure 7 Output ripple & noise at 3.3Vin, 2.5V/10A outFigure 9 Output ripple & noise at 5Vin, 3.3V/10A out Figure 11 Turn on delay time at 3.3Vin, 2.5V/10A outELECTRICAL CHARACTERISTICS CURVES Figure 13 Turn on delay time at 5Vin, 3.3V/10A outFigure 15 Turn on delay time at remote turn on 5Vin, 3.3V/16A out Figure 16 Turn on delay time at remote turn on 3.3Vin, 2.5V/16AELECTRICAL CHARACTERISTICS CURVES Figure 23 Typical Transient Response to Step Load Change atELECTRICAL CHARACTERISTICS CURVES Figure 27 Output short circuit current 5Vin, 0.75VoutTEST CONFIGURATIONS DESIGN CONSIDERATIONSη = Vo ⋅ Io ⋅100 % Vout ⎞FEATURES DESCRIPTIONS Safety ConsiderationsDESIGN CONSIDERATIONS CON Remote On/OffFEATURES DESCRIPTIONS CON Over-Temperature ProtectionRemote Sense Output Voltage ProgrammingFEATURE DESCRIPTIONS CON Voltage MarginingVoltage Tracking Sequential Start-up SimultaneousFEATURE DESCRIPTIONS CON PS1PS2THERMAL CONSIDERATIONS Thermal Testing SetupThermal Derating THERMAL CURVES DSDNM04SMD1007162008PICK AND PLACE LOCATION LEAD Sn/Pb PROCESS RECOMMEND TEMP. PROFILELEAD FREE SAC PROCESS RECOMMEND TEMP. PROFILE SURFACE-MOUNT TAPE & REELMECHANICAL DRAWING SMD PACKAGESIP PACKAGE OPTIONAL WARRANTY PART NUMBERING SYSTEMMODEL LIST