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L5993 Datasheet(PDF) 18 Page - STMicroelectronics

Part # L5993
Description  CONSTANT POWER CONTROLLER
PDF  22 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5993 Datasheet(HTML) 18 Page - STMicroelectronics

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Figure 38. Protection against overvoltage/feedback disconnection (latched)
L5993
D97IN775A
DC
VCC
VREF
R
START
3
12
8
4
11
Figure 39. Protection against overvol-
tage/feedback disconnection (not
latched)
D97IN776A
PGND
L5993
OPTIONAL
VREF
SGND
DIS
ISEN
I
4
14
13
12
11
R
SENSE
R2
R
1
I
pk
Ipk max ≅
2.5
R
SENSE
1-
R2
R
1
•
Figure 40. Device shutdown on overcurrent
D97IN777
PGND
L5993
OUT
SGND
ISEN
Lp
RFF
R
VIN
RFF = 6·10
6
R·Lp
RSENSE
RSENSE
13
10
12
11
80
÷ 400V
DC
Figure 41. Constant power in pulse-by-pulse current limitation (flyback discontinuous)
L5993
DC
10K
COMP
3
6
12
13
SGND
ISEN
D97IN778A
Figure 42. Voltage mode operation.
L5993
D98IN906
SGND
DIS
VCC
R
START
PGND
8
14
12
11
VZ
2.2K
L5993
D97IN774
SGND
DIS
VCC
RSTART
PGND
8
14
12
11
L5993
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