LED6000PHTR datasheet(45/49 Pages) STMICROELECTRONICS

부품명	LED6000PHTR

상세설명	3 A, 61 V monolithic current source with dimming capability

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제조업체	STMICROELECTRONICS [STMicroelectronics]

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LED6000

Application notes - alternative topologies

In case

Z and LC are lower than the target bandwidth, a type II compensation network is

necessary for loop stabilization, following the compensation strategy described in

Section 5.3 on page 27.

Otherwise, in case a very low bandwidth design is suitable, a simple type I compensation

network is required. This approach is feasible if the target bandwidth is ¼ of fLC or lower.

Figure 34. Type I compensation network

This kind of compensation network just provides one single low frequency pole, given by:

Equation 41

Starting from Equation 18 on page 28, the control loop gain module at s = 2

* FBW allows

to set fPLF necessary value:

Equation 42

A typical choice for RU usually falls in the range from 1 k to 50 k, in order to provide for

CF a reasonable value (in the range from 1 nF to 100 nF) and to proper bias the overvoltage

protection Zener diode.

PLF







)

(











PLF

LOOP



LED6000PHTR 데이터시트(PDF) 45 Page - STMicroelectronics