LED2000DR STMicroelectronics, LED2000DR Datasheet - Page 17

• Manufacturer Part Number: LED2000DR
• Description: Current & Power Monitors & Regulators 3A monolithic Conv 850kHz Synch
• Manufacturer: STMicroelectronics

Specifications of LED2000DR

• Rohs: yes
• Product: Current Regulators
• Supply Voltage - Max: 14.7 V
• Supply Voltage - Min: 14.1 V
• Input Voltage Range: 14.1 V to 14.7 V

LED2000
6.5
Equation 14
Total loop gain
In summary, the open loop gain can be expressed as:
Equation 15
Example 1
Design specification:
V
The inductor and capacitor value are dimensioned in order to meet the I
specification (see
L=10 H, C
Accordingly, with
Equation 16
Equation 17
The gain and phase margin Bode diagrams are plotted respectively in
Figure
IN
G s
R
=12 V, V
S
LED
=
LED
=
10.
-------------------- -
700 mA
100 mV
n
G
LED
CO
n
OUT
LED
FW_LED
=
s
=2.2 F MLCC (negligible ESR)
---------------------------------------------------------------- -
n
=
140 m
LED
Section 7.1.1
A
---------------------------------------------------------------- -
n
Section 7.1.2
0
LED
=3.5 V, n
s
R
r
LED
SENSE
R
r
LED
SENSE
LED
+
LED
R
+
SENSE
Doc ID 023432 Rev 3
n
R
LED
the sensing resistor value is:
= 2, r
SENSE
for output capacitor and inductor selection guidelines):
LED
=
= 1.1 , I
-------------------------------------------------- -
2
1.1
140 m
+
LED
140 m
= 700 mA, I
=
0.06
LED RIPPLE
Figure 9
LED RIPPLE
Application notes
= 2%
and
17/40