lt1186f Linear Technology Corporation, lt1186f Datasheet - Page 6

• Manufacturer Part Number: lt1186f
• Description: Dac Programmable Ccfl Switching Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
LT1186F
6
150
140
130
120
100
110
1.3
1.2
1.0
0.8
0.6
1.1
0.9
0.7
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
90
80
70
60
50
0
–75
–75
V
vs Temperature
High-Side Sense Supply Current
vs Temperature
V
vs Switch Current
0
C
SW
– 50
– 50
Switching Threshold
Sat Voltage
–25 0
–25 0
0.3
SWITCH CURRENT (A)
TEMPERATURE ( C)
TEMPERATURE ( C)
0.6
25
25 50 75 100
T = 125 C
T = 25 C
50
75
0.9
100
W
125
125 150
1.2
T = –5 C
LT1186F • G19
LT1186F • G22
150 175
LT1186F • G16
U
175
1.5
1.060
1.040
1.020
1.000
0.980
0.960
0.940
7.5
7.4
7.3
7.2
7.0
6.8
6.7
6.6
2.5
2.0
1.5
1.0
7.1
6.9
6.5
0.5
0
–75
–75
BULB Protect Servo Voltage
vs Temperature
High-Side Sense Null
Current vs Temperature
V
0
SW
– 50
– 50
10
Current Limit vs Duty Cycle
–25
–25 0
20
I
CCFL
TEMPERATURE ( C)
I
0
TEMPERATURE ( C)
CCFL
30
DUTY CYCLE (%)
I
CCFL
= 100 A
25
25 50 75 100
= 50 A
MINIMUM
40
T = 125 C
= 10 A
T = 25 C
50
50
75
60
100
T = 0 C
125
70
125 150
LT1186F • G23
LT1186F • G20
LT1186F • G17
150
80
175
175
90
0.160
0.140
0.120
0.100
0.080
0.060
0.040
0.020
0.000
110
100
10
90
80
70
60
50
40
30
20
10
2
0
8
6
4
0
–75
–75
High-Side Sense Null Current Line
Regulation vs Temperature
0
BULB Input Bias Current
vs Temperature
Forced Beta vs I
– 50
– 50
0.2
–25
–25 0
0.4
0.6
TEMPERATURE ( C)
0
TEMPERATURE ( C)
CCFL I
0.8
25 50 75 100
25
SW
1.0
50
SW
on V
1.2
75
(A)
100
1.4
SW
125 150
125
1.6
LT1186F • G18
LT1186F • G21
LT1186F • G24
150
1.8
175
175
2.0