EVALED2000P STMicroelectronics, EVALED2000P Datasheet - Page 14

• Manufacturer Part Number: EVALED2000P
• Description: LED Lighting Development Tools LED2000 3A 850KHz 3.0V to 18V Eval BRD
• Manufacturer: STMicroelectronics

Specifications of EVALED2000P

• Product Category: LED Lighting Development Tools
• Rohs: yes
• Product: Evaluation Boards
• Operating Supply Voltage: 3 V to 18 V
• For Use With: LED2000

Application notes
14/40
Figure 6.
R
system stability but it is useful to reduce the noise at the output of the error amplifier.
The transfer function of the error amplifier and its compensation network is:
Equation 8
where A
The poles of this transfer function are (if C
Equation 9
Equation 10
whereas the zero is defined as:
Equation 11
C
f
F
P HF
and C
Z
A
0
=
f
s
P LF
=
----------------------------------------- -
2
vo
C
------------------------------------------------------------ -
2
=
FB
= G
V
introduce a pole and a zero in the open loop gain. C
=
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -
s
+
2
Transconductance embedded error amplifier
1
------------------------------------------
2
R
m
c
R
R
· R
dV
c
0
1
C
o
c
1
R
.
+
C
C
-
0
0
0
+
+
C
C
C
G
c
p
p
E/A
m
dV
Doc ID 023432 Rev 3
R
c
A
C
V0
COMP
c
+
s
1
R
+
C
R
0
s
>> C
0
R
C
c
c
0
+
+C
C
C
R
c
0
0
P
):
C
R
0
C
C
R
C
+
C
C
C
C
p
P
does not significantly affect
+
R
c
C
C
P
P
C
c
+
1
AM12897v1
LED2000