Datasheet LTC3897-2 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | PolyPhase Synchronous Boost Controller with Input/Output Protection |
| Pages / Page | 50 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| Revision | A |
| File Format / Size | PDF / 3.9 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. EXTVCC Switchover and DRVCC. Oscillator Frequency
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Text Version of Document
LTC3897-2
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. EXTVCC Switchover and DRVCC Oscillator Frequency Oscillator Frequency Voltages vs Temperature vs Temperature vs Input Voltage
11 600 600 DRVCC FREQ = INTV 10 CC 550 550 FREQ = INTVCC 9 DRVSET = INTVCC 500 500 8 EXTVCC RISING TAGE (V) 450 450 VOL 7 EXTVCC FALLING CC DRVCC DRV FREQUENCY (kHz) 400 FREQUENCY (kHz) 400 6 FREQ = GND DRVSET = GND FREQ = GND EXTV 5 CC RISING 350 350 EXTVCC FALLING 4 300 300 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 5 15 25 35 45 55 65 75 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 38972 G18 38972 G19 38972 G20
Maximum Current Sense SENSE Pin Input Current SENSE Pin Input Current Threshold vs ITH Voltage vs Temperature vs ITH Voltage
150 280 320 ILIM = INTVCC VSENSE = 12V 260 V 300 SENSE = 12V ILIM = INTVCC 120 PULSE–SKIPPING MODE I 240 LIM = FLOAT SENSE+ PIN 280 260 TAGE (mV) 220 BURST MODE I 240 LIM = FLOAT 90 200 SENSE+ PIN OPERATION 220 180 200 60 ILIM = GND I 160 180 LIM = FLOAT 140 160 30 120 140 ILIM = GND 100 120 0 SENSE CURRENT (µA) 80 100 SENSE CURRENT (µA) 80 60 60 I –30 40 LIM = INTVCC 40 ILIM = FLOAT FORCED CONTINUOUS MODE MAXIMUM CURRENT SENSE VOL 20 SENSE– PIN 20 SENSE– PIN ILIM = GND –60 0 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 –75 –50 –25 0 25 50 75 100 125 150 0 0.20 0.40 0.60 0.80 1 1.20 1.40 1.60 ITH VOLTAGE (V) TEMPERATURE (°C) ITH VOLTAGE (V) 38972 G21 38972 G22 38972 G23
SENSE Pin Input Current BOOST-SW Charge Pump Charging BOOST-SW Charge Pump Charging vs VSENSE Voltage Current vs Operating Frequency Current vs Switch Voltage
320 50 50 300 SENSE+ PIN ILIM = INTVCC VSW = 12V V 280 V BOOST – VSW = 7.5V BOOST – VSW = 7.5V 260 40 40 FREQ = INTV I CC 240 LIM = FLOAT 220 200 ILIM = GND 30 30 180 FREQ = GND 160 140 20 20 120 100 SENSE CURRENT (µA) 80 60 I 10 10 LIM = INTVCC T = 155°C 40 ILIM = FLOAT T = 25°C 20 SENSE– PIN ILIM = GND CHARGE PUMP CHARGING CURRENT (µA) T = –55°C CHARGE PUMP CHARGING CURRENT (µA) 0 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 100 200 300 400 500 600 5 10 15 20 25 30 35 40 45 50 55 60 65 VSENSE COMMON MODE VOLTAGE (V) OPERATING FREQUENCY (kHz) SWITCH VOLTAGE (V) 38972 G24 38972 G25 38972 G26 Rev. A For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. EXTVCC Switchover and DRVCC Oscillator Frequency Oscillator Frequency Voltages vs Temperature vs Temperature vs Input Voltage
11 600 600 DRVCC FREQ = INTV 10 CC 550 550 FREQ = INTVCC 9 DRVSET = INTVCC 500 500 8 EXTVCC RISING TAGE (V) 450 450 VOL 7 EXTVCC FALLING CC DRVCC DRV FREQUENCY (kHz) 400 FREQUENCY (kHz) 400 6 FREQ = GND DRVSET = GND FREQ = GND EXTV 5 CC RISING 350 350 EXTVCC FALLING 4 300 300 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 5 15 25 35 45 55 65 75 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 38972 G18 38972 G19 38972 G20
Maximum Current Sense SENSE Pin Input Current SENSE Pin Input Current Threshold vs ITH Voltage vs Temperature vs ITH Voltage
150 280 320 ILIM = INTVCC VSENSE = 12V 260 V 300 SENSE = 12V ILIM = INTVCC 120 PULSE–SKIPPING MODE I 240 LIM = FLOAT SENSE+ PIN 280 260 TAGE (mV) 220 BURST MODE I 240 LIM = FLOAT 90 200 SENSE+ PIN OPERATION 220 180 200 60 ILIM = GND I 160 180 LIM = FLOAT 140 160 30 120 140 ILIM = GND 100 120 0 SENSE CURRENT (µA) 80 100 SENSE CURRENT (µA) 80 60 60 I –30 40 LIM = INTVCC 40 ILIM = FLOAT FORCED CONTINUOUS MODE MAXIMUM CURRENT SENSE VOL 20 SENSE– PIN 20 SENSE– PIN ILIM = GND –60 0 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 –75 –50 –25 0 25 50 75 100 125 150 0 0.20 0.40 0.60 0.80 1 1.20 1.40 1.60 ITH VOLTAGE (V) TEMPERATURE (°C) ITH VOLTAGE (V) 38972 G21 38972 G22 38972 G23
SENSE Pin Input Current BOOST-SW Charge Pump Charging BOOST-SW Charge Pump Charging vs VSENSE Voltage Current vs Operating Frequency Current vs Switch Voltage
320 50 50 300 SENSE+ PIN ILIM = INTVCC VSW = 12V V 280 V BOOST – VSW = 7.5V BOOST – VSW = 7.5V 260 40 40 FREQ = INTV I CC 240 LIM = FLOAT 220 200 ILIM = GND 30 30 180 FREQ = GND 160 140 20 20 120 100 SENSE CURRENT (µA) 80 60 I 10 10 LIM = INTVCC T = 155°C 40 ILIM = FLOAT T = 25°C 20 SENSE– PIN ILIM = GND CHARGE PUMP CHARGING CURRENT (µA) T = –55°C CHARGE PUMP CHARGING CURRENT (µA) 0 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 100 200 300 400 500 600 5 10 15 20 25 30 35 40 45 50 55 60 65 VSENSE COMMON MODE VOLTAGE (V) OPERATING FREQUENCY (kHz) SWITCH VOLTAGE (V) 38972 G24 38972 G25 38972 G26 Rev. A For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
