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PRM48AT480T400A00 Datasheet(PDF) 10 Page - Vicor Corporation |
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PRM48AT480T400A00 Datasheet(HTML) 10 Page - Vicor Corporation |
10 / 45 page - 10 - PRM48A x 480 y 400A00 Rev. 1.0 11/2012 SGND: SIGNAL GROUND • All control signals must be referenced to this pin, with the exception of VC • SGND is internally connected to –IN and –OUT Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit Analog Input / Output Any Maximum Allowable Current ISGND -100 100 mA TRIM • TRIM is used to select operating mode and trim the output voltage in Adaptive Loop operation • Internal pullup to VCC_INT through10kΩ resistor • When pulled below 0.45V during power up, Remote Sense / Slave operation is selected • When allowed to pull up above 0.55 during power up, Adaptive Loop operation is selected • Operating mode is latched during power up and cannot be changed unless input power is cycled Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit Analog Input Normal Operation Internally generated VCC VCC_INT 3.20 3.28 3.36 V Internal Pullup Resistance to VCC_INT RTRIM_INT 0.5% tolerance resistor 9.83 10 10.18 kΩ Mode Detect Mode Detection Delay tMODE_DETECT From ENABLE high to mode detected, after VIN first applied 100 140 200 µs Remote Sense Enable Threshold VRS_MODE_EN Pull below this value during application of power to enable Remote Sense / Slave operation 0.45 V Remote Sense Disable Threshold VRS_MODE_DIS Pull above this value during application of power to enable Adaptive Loop operation 0.55 V TRIM (ADAPTIVE LOOP OPERATION ONLY) • Provides dynamic trim control over the PRM output voltage in Adaptive Loop operation • Sampled prior to every start up to detect if trim is active or inactive • Output voltage is equal to 20 times the voltage at the TRIM pin when applied TRIM voltage is within the active range • Trim state is latched during normal operation and cannot be changed until start up is initiated Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit Analog Input Start up Trim Enable Threshold VTRIM_EN Pull below this value during start up to enable trim control 3.10 V Trim Disable Threshold VTRIM_DIS Pull above this value during start up to disable trim control 3.20 V Minimum Trim Disable Resistance RTRIM_DIS_MIN Minimum TRIM resistance required to disable trim 10 MΩ Trim Capacitance (External) CTRIM_EXT 100 pF Trim Sample Delay tENABLE_TRIM From ENABLE high to TRIM sampled 100 140 200 µs Normal Operation TRIM Pin Analog Range VTRIM_RANGE See Figure 26 1.00 2.75 TRIM Gain GTRIM VOUT / VTRIM, VTRIM applied within active range 20 V/V Trim Accuracy %ACC_TRIM Vout accuracy, exclusive of external resistor tolerance 0.5 2 % VOUT referred trim resolution VOUT_RES 200 mV Trim latency tTRIM_LAT 60 120 240 s Trim Bandwidth BWTRIM -3dB point 1.2 kHz |
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Similar Description - PRM48AT480T400A00 |
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