LTC4269-1 Linear Technology Corporation, LTC4269-1 Datasheet - Page 8

• Manufacturer Part Number: LTC4269-1
• Description: IEEE 802.3 At PD And Synchronous No-Opto Flyback Controller
• Manufacturer: Linear Technology Corporation

w w w . D a t a S h e e t 4 U . c o m
LTC4269-1
TYPICAL PERFORMANCE CHARACTERISTICS
8
1700
1650
1600
1550
1500
1450
1400
1350
1300
1250
1200
1150
1100
–10
–30
–70
–50
10
70
50
30
–50
0.9
Feedback Amplifi er Output
Current vs V
Feedback Amplifi er Voltage Gain
vs Temperature
–25
1
0
TEMPERATURE (°C)
1.1
FB
23
22
21
20
19
18
17
16
15
25
V
–50
FB
1.2
Soft-Start Charge Current
vs Temperature
(V)
50
125°C
–25
1.3
75
0
TEMPERATURE (°C)
–40°C
1.4
100
25°C
42691 G22
42691 G19
25
125
1.5
50
75
1.250
1.245
1.220
1.240
1.235
1.230
1.225
70
65
50
40
60
55
45
100
–50
–50
Feedback Amplifi er Source and
Sink Current vs Temperature
UVLO vs Temperature
42691 G25
–25
125
–25
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
SOURCE CURRENT
25
25
50
50
V
FB
= 1.1V
75
75
80
70
60
50
40
30
20
10
V
CURRENT
0
FB
SINK
0
100
PG, SG Rise and Fall Times
vs Load Capacitance
100
= 1.4V
T
A
42691 G23
42691 G20
= 25°C
1
125
125
2
3
CAPACITANCE (nF)
FALL TIME
1050
4
1100
1000
950
900
3.7
3.4
3.0
3.6
3.5
3.3
3.2
3.1
–50
5
–50
Feedback Amplifi er g
vs Temperature
I
UVLO
6
–25
–25
RISE TIME
7
Hysteresis vs Temperature
8
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
42691 G26
9
25
25
10
50
50
m
75
75
100
100
42691 G21
42691 G24
42691f
125
125