LED2000PUR STMicroelectronics, LED2000PUR Datasheet - Page 13

• Manufacturer Part Number: LED2000PUR
• Description: LED Lighting Drivers 3.0V to 18V 850kHz 100mV 95mOhm HS
• Manufacturer: STMicroelectronics

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

LED2000
6.3
Equation 2
Equation 3
where:
Equation 4
S
(V
harmonic oscillations at duty cycle over 50%.
The sampling effect contribution F
Equation 5
where:
Equation 6
and
Equation 7
Error amplifier compensation network
The LED2000 embeds (see
network which is effective in stabilizing the system in most application conditions.
n
PP
Q
P
represents the slope of the sensed inductor current, S
F
Z
S
n
P
S
m
H
=
e
n
=
peak-to-peak amplitude) that implements the slope compensation to avoid sub-
=
=
C
s
-------------------------------------------
R
=
=
----------------------------------- -
ESR
--------------------------------------------------------------- -
=
LOAD
V
V
------------------------------- -
=
1
pp
IN
f
------------------------------------------- -
1
SW
+
m
1
–
+
1
S
------ -
S
C
L
C
V
f
---------------------
e
n
OUT
SW
C
OUT
n
OUT
s
1
1
1 D
Q
–
P
+
R
+
m
------------------------------------------------ -
i
–
L
s
----- -
C
2
2
n
0.5
C
OUT
1 D
Figure
–
Doc ID 023432 Rev 3
–
f
SW
H
0.5
(s) is:
6) the error amplifier and a pre-defined compensation
e
the slope of the external ramp
Application notes
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