LED2000DR STMicroelectronics, LED2000DR Datasheet - Page 18

• 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

Application notes
6.6
18/40
Figure 9.
Figure 10. Phase plot
The cut-off frequency and the phase margin are:
Equation 18
Dimming operation
The dimming input disables the switching activity, masking the PWM comparator output.
The inductor current dynamic when dimming input goes high depends on the designed
system response. The best dimming performance is obtained maximizing the bandwidth
and phase margin, when it is possible.
As a general rule, the output capacitor minimization improves the dimming performance.
f
C
=
100 kHz
Module plot
pm
=
47
Doc ID 023432 Rev 3
LED2000