UM0677

Description of reference design

Doc ID 15396 Rev 2

5/16

2

Description of reference design

This solution uses the L6726A controller with two external MOSFETs for synchronous

rectification. The main advantage is very good efficiency. Future scalability for even higher

currents could be seen as another advantage. This solution is much safer concerning the

border conditions as the current limit is defined only by the selection of the MOSFET.

Table 1.

Board parameters

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Input voltage

8

18

V

Output voltage

2.5

14

V

Output current

1 / 1.5 / 2.8

A

Dimm

Analog dimming

0

2.5

V

PWM signal

Low level

0

V

High level

2.8

3.3

3.8

V

1.

PWM signal has inverted characteristics (0% = full power).

0

99

%

η

Efficiency

94.8

%