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L5991AD13TR Datasheet, PDF (18/23 Pages) STMicroelectronics – PRIMARY CONTROLLER WITH STANDBY
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L5991 - L5991A
Figure 39. Typical E/A compensation networks.
From VO
Ri
Rd Cf
+
2.5V
1.3mA
VFB 5
Rf
+
-
EA
2R
R
COMP 6
12
SGND
Error Amp compensation circuit for stabilizing any current-mode topology except
for boost and flyback converters operating with continuous inductor current.
From VO
RP
Ri
CP
Rd Cf
+
2.5V
1.3mA
VFB 5
Rf
+
-
EA
2R
R
COMP 6
12
SGND D97IN507
Error Amp compensation circuit for stabilizing current-mode boost and flyback
topologies operating with continuous inductor current.
Figure 40. Feedback with optocoupler.
VOUT
L5991
COMP
6
5
VFB
Figure 41. Slope compensation techniques.
TL431
D97IN759
RB
I
RSLOPE
RSENSE
ST-BY
VREF
RA
RCT
CT
ISEN
16
4
2
L5991 I
13
12
SGND
RB
RSLOPE
RSENSE
ST-BY
VREF
RA
RCT
CT
ISEN
16
4
2
L5991
13
12
SGND
OUT
10
R
L5991
13
12
SGND
ISEN
RSLOPE
CSLOPE
RSENSE
OPTIONAL
OPTIONAL
D97IN760A
OPTIONAL
18/23
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