ltc4268cdkd-1-trpbf Linear Technology Corporation, ltc4268cdkd-1-trpbf Datasheet - Page 6

• Manufacturer Part Number: ltc4268cdkd-1-trpbf
• Description: High Power Pd With Synchronous Noopto Flyback Controller
• Manufacturer: Linear Technology Corporation

LTC4268-1
TYPICAL PERFORMANCE CHARACTERISTICS
6
V1:
V2:
0.5
0.1
0.4
0.3
0.2
26
25
24
22
28
27
23
4
3
2
1
0
0
–2
–1
0
Input Current vs Input Voltage
25k Detection Range
0
Signature Resistance vs Input
Voltage
Active Low PWRGD: Output Low
Voltage vs Current
RESISTANCE =
DIODES: DF1501S
T
T
T
LTC4268-1 ONLY
A
A
A
= 25°C
= 25°C
= 25°C
–2
2
LTC4268-1 + 2 DIODES
–3
–4
INPUT CURRENT (mA)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
–4
V
4
I
–5
–6
=
V2 – V1
IEEE LOWER LIMIT
I
IEEE UPPER LIMIT
2
– I
–6
1
6
–7
–8
–8
8
–10
–9
42681 G04
42681 G07
42681 G01
–10
10
20mA/DIV
CURRENT
VOLTAGE
10V/DIV
CLASS
INPUT
100
1.0
0.8
0.6
0.4
0.2
80
60
40
20
0
0
0
0
Input Current vs Input Voltage
*OPTIONAL CLASS 5 CURRENT
Class Operation vs Time
Active High PWRGD: Output Low
Voltage vs Current
T
T
GND – V
A
A
= 25°C
= 25°C
–10
NEG
0.5
INPUT CURRENT (mA)
INPUT VOLTAGE (V)
–20
= 4V
TIME (10μs/DIV)
CLASS 5*
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
–30
1
–40
1.5
T
A
–50
= 25°C
42681 G02
42681 G08
42681 G05
–60
2
11.0
10.5
10.0
12.0
11.5
400
800
600
200
9.0
1.0
0.2
9.5
0.8
0.6
0.4
0
–12
–40
–50
Input Current vs Input Voltage
On Resistance vs Temperature
Current Limit vs Input Voltage
CLASS 1 OPERATION
–25
–14
JUNCTION TEMPERATURE (°C)
–45
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
–40°C
–40°C
0
85°C
85°C
–16
–40°C
85°C
–50
25
HIGH CURRENT MODE
LOW CURRENT MODE
–18
50
–55
–20
75
42681 G03
42681 G06
42681 G09
42681fa
–22
–60
100