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DNS10S0A0R10NFD Datasheet(PDF) 8 Page - Delta Electronics, Inc. |
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DNS10S0A0R10NFD Datasheet(HTML) 8 Page - Delta Electronics, Inc. |
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8 / 14 page  DS_DNM10SIP10_03062009 8 FEATURES DESCRIPTIONS (CON.) Over-Temperature Protection The over-temperature protection consists of circuitry that provides protection from thermal damage. If the temperature exceeds the over-temperature threshold the module will shut down. The module will try to restart after shutdown. If the over-temperature condition still exists during restart, the module will shut down again. This restart trial will continue until the temperature is within specification Remote Sense The DNM provide Vo remote sensing to achieve proper regulation at the load points and reduce effects of distribution losses on output line. In the event of an open remote sense line, the module shall maintain local sense regulation through an internal resistor. The module shall correct for a total of 0.1V of loss. The remote sense line impedance shall be < 10 Ω. RL Distribution Losses Distribution Losses Distribution Losses Distribution Losses Vo Vin GND Sense Figure 23: Effective circuit configuration for remote sense operation Output Voltage Programming The output voltage of the DNM can be programmed to any voltage between 0.75Vdc and 5.0Vdc by connecting one resistor (shown as Rtrim in Figure 24) between the TRIM and GND pins of the module. Without this external resistor, the output voltage of the module is 0.7525 Vdc. To calculate the value of the resistor Rtrim for a particular output voltage Vo, please use the following equation: Rtrim 10500 Vo 0.7525 − 1000 − ⎛⎜ ⎝ ⎞⎟ ⎠ Ω ⋅ := Rtrim is the external resistor in Ω Vo is the desired output voltage For example, to program the output voltage of the DNM module to 3.3Vdc, Rtrim is calculated as follows: Rtrim 10500 2.5475 1000 − ⎛⎜ ⎝ ⎞⎟ ⎠ Ω ⋅ := Rtrim = 3.122 kΩ DNM can also be programmed by applying a voltage between the TRIM and GND pins (Figure 25). The following equation can be used to determine the value of Vtrim needed for a desired output voltage Vo: Vtrim 0.7 Vo 0.7525 − ( ) 0.0667 ⋅ ⎡⎣ ⎤⎦ − := Vtrim is the external voltage in V Vo is the desired output voltage For example, to program the output voltage of a DNM module to 3.3 Vdc, Vtrim is calculated as follows Vtrim 0.7 2.5475 0.0667 ⋅ ( ) − := Vtrim = 0.530V Figure 24: Circuit configuration for programming output voltage using an external resistor Figure 25: Circuit Configuration for programming output voltage using external voltage source |
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