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FEATURES
High Efficiency:
94.0% @ 12Vin, 5V/20A out
Size:
Vertical: 30.5x15.5x12.0mm
(1.20”x0.61”x0.47”)
Horizontal: 30.5x15.5x12.9mm
(1.20”x0.61”x0.51”)
Wide input range: 4.5V~13.8V
Output voltage programmable from
0.59Vdc to 5.1Vdc via external resistors
Voltage and resistor-based trim
No minimum load required
Fixed frequency operation
Input UVLO, output OCP
Remote ON/OFF (Positive)
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing fac
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TECHNICAL SPECIFICATIONS (Ambient Temperature=25°C, minimum airflow=200LFM, nominal V =12Vdc unless otherwise specified.) in PARAMETER NOTES and CONDITIONS NE12S0A0V/H20 Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage operation 4.5 13.8 Vdc Operating Temperature (Vertical) Refer to Fig.25 for the measuring point 0 130 °C Operating Temperature (Horizontal) Refer to Fig.25 for the measuring point 0 TBD °C Storage Temperature -55 125 °C INPUT CHARACTERISTICS
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ELECTRICAL CHARACTERISTICS CURVES 95 95 90 90 85 85 80 80 75 75 70 70 65 65 60 60 55 55 1 2 4 6 8 1012 1416 1820 1 2 4 6 8 10 12 14 16 18 20 Output current (A) Output current (A) Figure 1: Converter efficiency vs. output current Figure 2: Converter efficiency vs. output current (0.59V output voltage, 12V input) (0.9V output voltage, 12V input) 95 95 90 90 85 85 80 80 75 75 70 70 65 65 60 60 55 55 12468 10 12 14 16 18 20 1 2 4 6 8 1012 1416 1820 Output current (A) Output current (A) Fig
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ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 7: Output ripple & noise at 12Vin, 0.59V/20A out Figure 8: Output ripple & noise at 12Vin, 0.9V/20A out Figure 9: Output ripple & noise at 12Vin, 1.5V/20A out Figure 10: Output ripple & noise at 12Vin, 2.5V/20A out Figure 11: Output ripple & noise at 12Vin, 3.3V/20A out Figure 12: Output ripple & noise at 12Vin, 5.0V/20A out Preliminary DS_NE12S20A_07272007 4
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ELECTRICAL CHARACTERISTICS CURVES (CON.) 0 0 0 0 Figure 13: Turn on delay time at 12Vin, 0.59V/20A out Figure 14: Turn on delay time Remote On/Off, 2.5V/20A out Ch1: Vin, Ch4: Vout Ch1: Enable, Ch4: Vout 0 0 0 0 Figure 15: Turn on delay time at 12Vin, 3.3V/20A out Figure 16: Turn on delay time at Remote On/Off, 5.0V/20A out Ch1: Vin, Ch4: Vout Ch1: Enable, Ch4: Vout Figure 17: Typical transient response to step load change at 5A/µS from 75%~100% load, at 12V
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DESIGN CONSIDERATIONS FEATURES DESCRIPTIONS The NE12S0A0V(H)20 uses a single phase and voltage Enable (On/Off) mode controlled buck topology. The output can be trimmed in the range of 0.59Vdc to 5.1Vdc by a resistor The ENABLE (on/off) input allows external circuitry to from Trim pin to Ground. put the NE converter into a low power dissipation (sleep) mode. Positive ENABLE is available as standard. With The converter can be turned ON/OFF by remote control the active high funct
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Output Voltage Programming FEATURES DESCRIPTIONS (CON.) The output voltage of the NE series is trimmable by The ENABLE input can be driven in a variety of ways as connecting an external resistor between the trim pin and shown in Figures 19 and 20. If the ENABLE signal comes output ground as shown Figure 21 and the typical trim from the primary side of the circuit, the ENABLE can be resistor values are shown in Table 1. driven through either a bipolar signal transistor (Figure 18).
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FEATURES DESCRIPTIONS (CON.) Output Capacitance There is internal output capacitor on the NE series Voltage Margining Adjustment modules. Hence, no external output capacitor is required for stable operation. Output voltage margin adjusting can be implemented in the NE modules by connecting a resistor, Rmargin-up, from Reflected Ripple Current and Output Ripple and the Trim pin to the Ground for margining up the output Noise Measurement voltage. Also, the output voltage can be
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THERMAL CONSIDERATION THERMAL CURVES (NE12S0A0V20) Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer. Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. Thermal Testing Setup Delta’s DC/DC power modules are c
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THERMAL CURVES (NE12S0A0V20) NE12S0A0V20(standard) Output Current vs. Ambient Temperature and Air Velocity Output Current (A) @Vin=5.0V Vout=2.5V (Through PWB Orientation) 20 18 16 Natural 100LFM Convection 200LFM 14 300LFM 400LFM 12 500LFM 10 600LFM 8 6 4 2 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature ( ) ℃ Figure 28: Output current vs. ambient temperature and air velocity@ Vin=5.0V, Vout=2.5V (Through PWB Orientation) NE12S0A0V20(standard) Output Cu
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MECHANICAL DRAWING VERTICAL HORIZONTAL Preliminary DS_NE12S20A_07272007 11
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PART NUMBERING SYSTEM NE 12 S 0A0 V 20 P N F A Product Input Number of Output ON/OFF Pin Option Output Voltage Mounting Series Voltage outputs Current Logic Length Code A-standard NE- 12- 4.5~13.8V S- Single 0A0 - programmable V- Vertical 20-20A P- Positive N- 0.150” F- RoHS 6/6 function Non-isolated output H- Horizontal N- Negative (Lead Free) Series MODEL LIST Efficiency Model Name Packaging Input Voltage Output Voltage Output Current 12Vin @ 100% load NE12S0A0V20PNFA Vertical
