ISL78229 Datasheet, PDF (24/71 Pages) Intersil Corporation – 2-Phase Boost Controller with Drivers

ISL78229
Performance Curves Unless otherwise specified, operating conditions for the oscilloscope waveforms are V_IN = 12V,
V_OUT = 36V and T_A = +25°C. (Continued)
3
1.265
1.263
2
1.261
1
1.259
1.257
0
1.255
1.253
-1
1.251
-2
1.249
1.247
-3
-50 -25
0
25
50
75 100 125 150
TEMPERATURE (°C)
FIGURE 53. ANALOG TRACKING REFERENCE SYSTEM ACCURACY vs
TEMPERATURE, MEASURED AT THE FB PIN,
V_TRACK = 1.5V
1.245
-50 -25
0
25
50
75 100 125 150
TEMPERATURE (°C)
FIGURE 54. DIGITAL TRACKING REFERENCE SYSTEM ACCURACY vs
TEMPERATURE, MEASURED AT THE FB PIN, DUTY
CYCLE OF TRACK PIN SIGNAL IS 0.5
100
90
80
tDT2
70
60
tDT1
50
40
30
20
10
0
-50 -25
0
25
50
75 100 125 150
TEMPERATURE (°C)
FIGURE 55. GATE DRIVE DEAD TIME vs TEMPERATURE, R_DT = 10k,
t_DT1 REFERS TO UG FALLING TO LG RISING, t_DT2
REFERS TO LG FALLING TO UG RISING
150
140
130
120
tDT2
110
100
90
tDT1
80
70
60
50
-50 -25
0
25
50
75 100 125 150
TEMPERATURE (°C)
FIGURE 56. GATE DRIVE DEADTIME vs TEMPERATURE, R_DT = 18.2k,
t_DT1 REFERS TO UG FALLING TO LG RISING, t_DT2
REFERS TO LG FALLING TO UG RISING
0.450
0.449
0.448
0.447
0.446
0.445
0.444
0.443
0.442
0.441
0.440
-50 -25
0
25
50
75 100 125 150
TEMPERATURE (°C)
FIGURE 57. NTC WARNING THRESHOLD (DEFAULT) vs TEMPERATURE
0.310
0.309
0.308
0.307
0.306
0.305
0.304
0.303
0.302
0.301
0.300
-50 -2 5
0
25
50
75 100 125 150
TEMPERATURE (°C)
FIGURE 58. NTC FAULT THRESHOLD (DEFAULT) vs TEMPERATURE
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FN8656.3
February 12, 2016