LTC3765_15 Datasheet, PDF (4/24 Pages) Linear Technology – Active Clamp Forward Controller and Gate Driver

LTC3765
TYPICAL PERFORMANCE CHARACTERISTICS
V_CC Supply Current
vs Supply Voltage
2.0
1.5
1.0
0.5
0
0
5
10
15
SUPPLY VOLTAGE (V)
3765 G01
Charge Pump Output Current
vs Temperature
50
V_CC = 5V
45
NDRV = 7V
40
35
30
NDRV = 9V
25
20
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3765 G04
I_SMAG Thresholds
vs Temperature
1.03
1.02
1.01
POSITIVE THRESHOLD MAGNITUDE
1.00
NEGATIVE THRESHOLD MAGNITUDE
0.99
0.98
0.97
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3765 G07
V_CC UVLO Thresholds
vs Temperature
7.6
7.5
7.4
RISING
7.3
7.2
7.1
7.0
FALLING
6.9
6.8
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3765 G02
Start-Up Oscillator Frequency
vs R_FS Resistor Value
500
450
400
350
300
250
200
150
100
50
0
0 10 20 30 40 50 60 70 80
R_FS (kΩ)
3765 G05
I_SMAG Replicated Slope
vs RUN Pin Voltage and R_CORE
1800
1600
1400
1200
1000
R_CORE = 10kΩ
800
600
R_CORE = 30kΩ
400
200
R_CORE = 50kΩ
0
1
2
3
4
5
6
7
RUN PIN VOLTAGE (V)
3765 G08
4
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Charge Pump Output Current
vs V_CC Supply Current
100
90
80
70
60
NDRV = V_CC + 2V
50
40
30
20
NDRV = V_CC + 4V
10
0
3
4
5
6
7
8
9
V_CC VOLTAGE (V)
3765 G03
Start-Up Oscillator Frequency
vs Temperature
500
450
R_FS = 10kΩ
400
350
300
250
R_FS = 20kΩ
200
150
100
R_FS = 75kΩ
50
0
–55 –25
5 35 65 95 125 155
TEMPERATURE (°C)
3765 G06
I_SMAG Replicated Slope
vs Temperature
500
450 ^{VRUN = 1.5V}
400
R_CORE = 10kΩ
350
300
250
200
R_CORE = 30kΩ
150
100
R_CORE = 50kΩ
50
0
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3765 G09
3765fb