DocID026965 Rev 2

15/26

ALED6001

Device description

26

In the ALED6001 the slope compensation is achieved by injecting a sawtooth current into

the CSNS pin. Therefore the voltage across the CSNS pin is given by:

Equation 1

resistor is calculated for the desired slope compensation amount (typically at least half the

downslope of the inductor current during the switching off-time):

Equation 2

Equation 3

the CSNS pin.

Figure 6. Power switch current sensing scheme

R

SNS

50mV

I

LPEAK

,

--------------------

≅

R

SLOPE

V

OUT

V

–

IN min

,

f

L

----------------------------------------

•

R

SNS

I

SL

--------------

≥