LTC3787IUFD 查看數據表（PDF） - Linear Technology
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LTC3787IUFD Datasheet PDF : 36 Pages
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LTC3787
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency
vs Temperature
600
FREQ = INTVCC
550
500
450
400
FREQ = GND
350
300
–60 –35 –10 15 40 65 90
TEMPERATURE (°C)
115 140
3787 G19
Maximum Current Sense
Threshold vs ITH Voltage
120
100
80
PULSE-SKIPPING MODE
60
Burst Mode
OPERATION
40
20
0
ILIM = GND
ILIM = FLOAT
–20
ILIM = INTVCC
–40 FORCED CONTINUOUS MODE
–60
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4
ITH VOLTAGE (V)
3787 G21
SENSE Pin Input Current
vs ITH Voltage
260
240 VSENSE = 12V
ILIM = INTVCC
220
200 SENSE+ PIN
180
ILIM = FLOAT
ILIM = GND
160
140
120
100
80
60
40
20 SENSE – PIN
0
0 0.5 1
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
1.5 2 2.5 3
ITH VOLTAGE (V)
3787 G23
Oscillator Frequency
vs Input Voltage
360
FREQ = GND
358
356
354
352
350
348
346
344
342
340
5
10 15 20 25 30
INPUT VOLTAGE (V)
35 40
3787 G20
SENSE Pin Input Current
vs Temperature
260
240
220
VSENSE = 12V
ILIM = FLOAT
200
SENSE+ PIN
180
160
140
120
100
80
60
40
20
SENSE – PIN
0
–60 –35 –10 15 40 65 90 115 140
TEMPERATURE (°C)
3787 G22
SENSE Pin Input Current
vs VSENSE Voltage
260
240 SENSE+ PIN
ILIM = INTVCC
220
200
ILIM = FLOAT
180
ILIM = GND
160
140
120
100
80
60
40
20 SENSE – PIN
0
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
2.5 7.5 12.5 17.5 22.5 27.5 32.5 37.5
VSENSE COMMON MODE VOLTAGE (V) 3787 G24
8
3787fc
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