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E-L5991AD

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
Figure 42.
Protection against overvoltage/feedback disconnection (latched)
L5991
D97IN755A
DC
V
CC
VREF
R
START
3
12
8
4
11
Figure 43
Protection against overvoltage/feed-
back disconnection (not latched)
D97IN756A
PGND
L5991
OPTIONAL
VREF
SGND
DIS
ISEN
I
4
14
13
1211
R
SENSE
R
2
R
1
I
pk
I
pk max
≅
2.5
R
SENSE
1-
R
2
R
1
•
Figure 44. Device shutdown on overcurrent
D97IN757
PGND
L5991
OUT
SGND
ISEN
L
p
R
FF
R
V
IN
R
FF
= 6·10
6
R·L
p
R
SENSE
R
SENSE
13
10
1211
80 ÷ 400V
DC
Figure 45. Constant power in pulse-by-pulse current limitation (flyback discontinuous)
L5991
DC
10K
COMP
3
6
12 13
SGND ISEN
D97IN758A
Figure 46. Voltage mode operation.
L5991
D98IN905
SGND
DIS
V
CC
R
START
PGND
8
14
12 11
V
Z
2.2K
L5991
D97IN754
SGND
DIS
V
CC
R
START
PGND
8
14
12 11
L5991 - L5991A
19/23
L5991
4
3
12 11
VREF
SGND PGND
10KΩR25.1
R1
4.7K
V
IN
80÷400V
DC
D97IN750B
Figure 47. Device shutdown on mains undervoltage.
L5991
1
12
SYNC
SGND
1KΩ
5.1V
D97IN753A
Figure 48. Synchronization to flyback pulses (for monitors).
L5991 - L5991A
20/23
DIP16
DIM.
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
a1 0.51 0.020
B 0.77 1.65 0.030 0.065
b 0.5 0.020
b1 0.25 0.010
D 20 0.787
E 8.5 0.335
e 2.54 0.100
e3 17.78 0.700
F 7.1 0.280
I 5.1 0.201
L 3.3 0.130
Z 1.27 0.050
OUTLINE AND
MECHANICAL DATA
L5991 - L5991A
21/23
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23

E-L5991AD

Mfr. #:
Buy E-L5991AD
Manufacturer:
STMicroelectronics
Description:
Switching Controllers Prog Current Mode
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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