ISL6726_14 Datasheet, PDF (11/20 Pages) Intersil Corporation – Active Clamp Forward PWM Controller

ISL6726
Typical Performance Curves
1000
1.010
RTC = 10kΩ
RTC = 25kΩ
1.005
100
1.000
RTC = 50kΩ
0.995
10
0.1
1
10
CT (nF)
FIGURE 1. OSCILLATOR FREQUENCY vs CT and RTC
600
500
OVERLAP
400
300
NON-OVERLAP
200
100
0
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300
DELAY RESISTANCE (kΩ)
FIGURE 3. DELAY TIME vs RESISTANCE
1.05
1.04
1.03
RDELAY = 20k
1.02
1.01
RDELAY = 120k
1.00
0.99
0.98
RDELAY = 200k
0.97
0.96
0.95
-40 -25 -10 5
20 35 50 65 80 95 110
TEMPERATURE (°C)
FIGURE 5. DELAY TIME vs TEMPERATURE (NON-OVERLAP)
11
0.990
-40 -25 -10 5
20 35 50 65 80 95 110
TEMPERATURE (°C)
FIGURE 2. OSCILLATOR FREQUENCY vs TEMPERATURE
1.05
1.04
1.03
RDELAY = 20k
1.02
1.01
RDELAY = 120k
1.00
0.99
0.98
RDELAY = 200k
0.97
0.96
0.95
-40 -25 -10 5 20 35 50 65 80 95 110
TEMPERATURE (°C)
FIGURE 4. DELAY TIME vs TEMPERATURE (OVERLAP)
1.010
1.005
1.000
0.995
0.990
-40 -25 -10
5 20 35 50 65
TEMPERATURE (°C)
80 95 110
FIGURE 6. VREF vs TEMPERATURE
FN7654.0
January 31, 2011