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IPM12C0A0S04FA Datasheet(PDF) 8 Page - Delta Electronics, Inc. |
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IPM12C0A0S04FA Datasheet(HTML) 8 Page - Delta Electronics, Inc. |
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8 / 16 page  DS_IPM04C0A0R06_10142013 8 DESIGN CONSIDERATIONS Safety Considerations For safety-agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a maximum 10A time-delay fuse in the ungrounded lead. Remote On/Off The IPM series power modules have an On/Off control pin for output voltage remote On/Off operation. The On/Off pin is an open collector/drain logic input signal that is referenced to ground. When On/Off control pin is not used, leave the pin unconnected. The remote on/off pin is internally connected to +Vin through an internal pull-up resistor. Figure 27 shows the circuit configuration for applying the remote on/off pin. The module will execute a soft start ON when the transistor Q1 is in the off state. The typical rise for this remote on/off pin at the output voltage of 0.9V and 3.3V are shown in Figure 17 and 18. Vo On/Off Vin GND IPM Q1 RL Figure 27: Remote on/off implementation FEATURES DESCRIPTIONS Over-Current Protection To provide protection in an output over load fault condition, the unit is equipped with internal over-current protection. When the over-current protection is triggered, the unit enters hiccup mode. The units operate normally once the fault condition is removed. Pre-Bias Startup Capability The IPM would perform the monotonic startup into the pre-bias loads; so as to avoid a system voltage drop occur upon application. In complex digital systems an external voltage can sometimes be presented at the output of the module during power on. This voltage may be feedback through a multi-supply logic component, such as FPGA or ASIC. Another way might be via a clamp diode as part of a power up sequencing implementation. Output Voltage Programming The output voltage of IPM can be programmed to any voltage between 0.9Vdc and 3.3Vdc by connecting one resistor (shown as Rtrim in Figure 28, 29) between the TRIM and GND pins of the module to trim up (0.9V ~ 3.3V) and between the Trim and +Output to trim down (0.8V ~ 0.9V). Without this external resistor, the output voltage of the module is 0.9 Vdc. To calculate the value of the resistor Rtrim for a particular output voltage Vo, please use the following equation: Trim up Rtrim = 7.0 - 0.187 (K Ω ) Vadj. –0.9 Trim Down Rtrim = 2.0 - 10.187 (K Ω ) 0.9 – Vadj. Rtrim is the external resistor in K Ω Vout is the desired output voltage |
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