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LTM4653 Arkusz danych(PDF) 10 Page - Linear Technology |
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LTM4653 Arkusz danych(HTML) 10 Page - Linear Technology |
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10 / 32 page  LTM4653 10 Rev 0 For more information www.analog.com IMONb (C1): Power Inductor Analog Indicator Current De- fault Termination R-C Network. A 10kΩ resistor in parallel with a 10nF capacitor and terminating to SGND connect to this pin. Connect IMONb to IMONa to achieve default power inductor analog indicator current characteristics: 1V at full scale (4A) load current. (See IMONa.) TEMP+ (J1, J6): Temperature Sensor, Positive Input. Emitter of a 2N3906-genre PNP bipolar junction transis- tor (BJT). Optionally interface to temperature monitor- ing circuitry such as LTC®2997, LTC2990, LTC2974 or LTC2975.Otherwiseleaveelectricallyopen.PinsJ1andJ6 areelectricallyconnectedtogetherinternaltotheLTM4653, and thus it is only necessary to connect one TEMP+ pin to monitoring circuitry. The remaining TEMP+ pin can be used for redundant connectivity or routed to an ICT test point for design-for-test considerations, as desired. TEMP– (J2, J7): Temperature Sensor, Negative Input. Collector and base of a 2N3906-genre PNP bipolar junc- tion transistor (BJT). Optionally interface to temperature monitoringcircuitrysuchasLTC2997, LTC2990,LTC2974 or LTC2975. Otherwise leave electrically open. Pins J2 and J7 are electrically connected together internal to the LTM4653, and thus it is only necessary to connect one TEMP– pin to monitoring circuitry. The remaining TEMP– pin can be used for redundant connectivity or routed to an ICTtestpointfordesign-for-testconsiderations,asdesired. SW (H4): Switching Node of Switching Converter Stage. Used for test purposes. May be routed a short distance with a thin trace to a local test point to monitor switching action of the converter, if desired, but do not route near any sensitivesignals;otherwise,leaveelectricallyopencircuit. NC (A6-7, B2, B6-7, C6-7, D6-7, E6-7, F6-7, G6-7, H6-7, K6-7, L6-7): No connect pins, i.e., pins with no internal connection. The NC pins predominantly serve to provide improved mounting of the module to the board. In one’s layout, NC pins are permitted to remain electrically uncon- nected or can be connected as desired, e.g., connected to a GND plane for heat-spreading purposes and/or to facilitate routing. PIN FUNCTIONS |
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