Block diagram

STLD20D

6/31

Note:

The external components proposal should be considered as a design reference guide.The

performances mentioned in the electrical characteristics table are not guaranteed for all the

possible electrical parameters of the components included in this list. On the other hand the

operation of STLD20D is not limited with the use of components included in this list.

Figure 3.

Basic connection

Table 1.

External components proposal

Symbol

Parameter

Test conditions

Value

Unit

Min.

Typ.

Max.

LED current resistance

15

Ω

Input filtering capacitor

Ceramic type

2.2

µF

Output capacitance

1

L

Boost inductor (height < 2mm)

Inductance

10

µH

Resistance at 500kHz

1

Ω

300

mA

D

Boost diode

(STMicroelectronics STPS1L40M type)

40

1

A

0.40

0.46

V