LTC3901_15 Datasheet, PDF (4/16 Pages) Linear Technology – Secondary Side Synchronous Driver for Push-Pull and Full-Bridge Converters

LTC3901
TYPICAL PERFOR A CE CHARACTERISTICS
SYNC Negative Threshold vs
Temperature
–1.0
V_CC = 5V, 11V
–1.1
Propagation Delay vs V_CC
120
T_A = 25°C
110 ^CLOAD ^{= 4.7nF}
Propagation Delay vs
Temperature
120
V_CC = 5V
110 ^CLOAD ^{= 4.7nF}
–1.2
100
100
–1.3
90
90
–1.4
80
80
–1.5
–1.6
–1.7
–1.8
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3901 G07
70
60
SYNC TO ME
50
SYNC TO MF
40
45
6 7 8 9 10 11
V_CC (V)
3901 G08
70
60 SYNC TO ME
50
SYNC TO MF
40
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3901 G09
Propagation Delay vs C_LOAD
120
T_A = 25°C
110 ^VCC ^{= 5V}
100
90
80
70
60 ^{SYNC TO ME}
50
SYNC TO MF
40
1 2 3 4 5 6 7 8 9 10
C_LOAD (nF)
3901 G10
Rise/Fall Time vs V_CC
50
45
T_A = 25°C
C_LOAD = 4.7nF
40
35
30
25
20
15
10
FALL TIME
5
RISE TIME
0
45
6 7 8 9 10 11
V_CC (V)
3901 G11
Rise/Fall Time vs Temperature
50
45
V_CC = 5V
C_LOAD = 4.7nF
40
35
30
25
20
15 ^{RISE TIME}
10
FALL TIME
5
0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3901 G12
Rise/Fall Time vs Load
Capacitance
50
45
T_A = 25°C
V_CC = 5V
40
35
30
25
20
RISE TIME
15
FALL TIME
10
5
0
0 1 2 3 4 5 6 7 8 9 10
C_LOAD (nF)
3901 G13
Undervoltage Lockout Threshold
Voltage vs Temperature
4.5
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
–50
RISING EDGE
FALLING EDGE
–25 0 25 50 75
TEMPERATURE (°C)
100 125
3901 G14
3901f
4