stld41pur STMicroelectronics, stld41pur Datasheet - Page 13

• Manufacturer Part Number: stld41pur
• Description: White Led Driver For Mid-size Lcd Display Backlight
• Manufacturer: STMicroelectronics

STLD41
8
Figure 7.
Figure 9.
Figure 11. Output current regulation at 4x10
100
100
95
90
85
80
75
70
65
60
55
50
95
90
85
80
75
70
65
60
55
50
140
130
120
110
100
90
80
70
60
50
40
30
20
10
5
5
2
6
6
3
I
I
I
OUT
OUT
OUT
7
7
4
I
I
I
OUT
OUT
OUT
=120m
=81mA
=66mA
Typical performance characteristics
Eff. vs. V
8
Eff. vs. V
V
8
LEDs
5 6
=120mA
=81mA
=66mA
OUT
9
9
7
10 11 12 13 14 15 16 17 18 19 20 21 22
10 11 12 13 14 15 16 17 18 19 20 21 22
= 33 V
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22
I
I
IN
IN
OUT
OUT
I
I
, 6 x 6 LEDs, V
, matrix 4 x 9 LEDs,
OUT
OUT
=51mA
=35mA
=51mA
=35mA
V
V
V
IN
IN
IN
[V]
[V]
[V]
I
I
120mA / Rsense=1R3
100mA / Rsense=1R6
50mA / Rsense=3R3
20mA / Rsense=8R2
OUT
OUT
I
I
OUT
OUT
=25mA
=15mA
=25mA
=15mA
OUT
Doc ID 022283 Rev 2
= 24 V Figure 8.
Figure 10. Application eff. vs. V
Figure 12. V
180
170
160
150
140
130
120
110
100
100
90
80
70
60
50
40
30
20
10
95
90
85
80
75
70
65
60
55
50
95
90
85
80
75
70
65
60
55
50
0
5
2 3
6
10
I
I
I
4 5 6
OUT
OUT
OUT
7
I
I
OUT
OUT
=120mA
=81mA
=66mA
=120mA
=78mA
Eff. vs. V
8
10 LEDs
I
20
Typical performance characteristics
OUTset
FB
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
9
30
vs. PWM 2 5 kHz, V
10 11 12 13 14 15 16 17 18 19 20 21 22
= 120 mA
40
I
I
IN
OUT
OUT
V
I
I
OUT
IN
IN
, 5 x 7 LEDs, V
=51mA
=35mA
@120mA
[V]
=25mA
50
V
DC [%]
IN
[V]
60
I
I
70
OUT
OUT
IN
=25mA
=15mA
I
I
, matrix 4 x
IN
IN
IN
@78mA
@25mA
80
OUT
= 5.5 V,
90
= 27 V
1200
1000
800
600
400
200
0
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