LED2000PUR STMicroelectronics, LED2000PUR Datasheet - Page 14
LED2000PUR
Manufacturer Part Number
LED2000PUR
Description
LED Lighting Drivers 3.0V to 18V 850kHz 100mV 95mOhm HS
Manufacturer
STMicroelectronics
Datasheet
1.LED2000DR.pdf
(40 pages)
Specifications of LED2000PUR
Rohs
yes
Input Voltage
3 V to 18 V
Operating Frequency
850 kHz
Maximum Supply Current
3 A
Mounting Style
SMD/SMT
Package / Case
VFQFPN-8L
Power Dissipation
2 W
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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