MAX5094A Просмотр технического описания (PDF) - Maxim Integrated
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MAX5094A Datasheet PDF : 22 Pages
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High-Performance, Single-Ended, Current-Mode
PWM Controllers
Typical Operating Characteristics (continued)
(VCC = 15V, TA = +25°C, unless otherwise noted.)
REFERENCE VOLTAGE
vs. TEMPERATURE
5.08
5.06
5.04
5.02
5.00
IREF = 1mA
4.98
4.96
IREF = 20mA
4.94
4.92
4.90
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (fOSC)
vs. TEMPERATURE
550
RT = 3.65kΩ
540 CT = 560pF
530
520
510
500
490
480
470
460
450
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
MAXIMUM DUTY CYCLE vs. FREQUENCY
MAX5094A/MAX5094C/MAX5095A
100
90
CT = 100pF
80
70
60
50
CT = 1000pF
40
CT = 560pF CT = 220pF
30
20
10
0
0 500 1000 1500 2000 2500 3000 3500 4000
OSCILLATOR FREQUENCY (kHz)
REFERENCE VOLTAGE
vs. REFERENCE LOAD CURRENT
5.05
5.00
4.95
4.90
4.85
4.80
4.75
4.70
4.65
0
10 20 30 40 50 60 70
IREF (mA)
OSCILLATOR RT/CT DISCHARGE CURRENT
vs. TEMPERATURE
8.04
VRT/CT = 2V
8.02
8.00
7.98
7.96
7.94
7.92
7.90
7.88
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
CURRENT-SENSE TRIP THRESHOLD
vs. TEMPERATURE
1.10
MAX5094A/MAX5094B
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92 VFB = 0V
0.90
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
5.000
4.998 IREF = 1mA
4.996
4.994
4.992
4.990
4.988
4.986
4.984
4.982
4.980
10 12 14 16 18 20 22 24 26
VCC (V)
MAXIMUM DUTY CYCLE
vs. TEMPERATURE
100
MAX5094A/MAX5094C/MAX5095A
90
80
70
60
50
40 MAX5094B/MAX5094D/MAX5095B/MAX5095C
30
20
10
RT = 5kΩ
CT = 560pF
0
-40 -25 -10 5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
CURRENT-SENSE TRIP THRESHOLD
vs. TEMPERATURE
0.40
0.38
MAX5094C/D: VFB = 0V
MAX5095_: VCOMP = 5V
0.36
0.34
0.32
0.30
0.28
0.26
0.24
0.22
0.20
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
_______________________________________________________________________________________ 7
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