2

USING THE EVALUATION BOARD

1) Powering Up the SP6134HVLED Circuit

The SP6134HVLED Evaluation Board can be powered from a 24V power supply. Connect with

short leads directly to the “VIN” and “GND” posts. Plug the 1W/3W/5W Luxeon LumiLED

between the “VOUT” and “VFB” posts. Refer to section 2 for Jumper (J1) setup for different

LumiLED applications.

2) Using the J1 Jumper for different LumiLED Applications

The SP6134HVLED Evaluation Board can be used to drive 1W, 3W or 5W LumiLED

respectively, this can be done by using the J1 Jumper. When no hat was used for the J1, it is

setup for 1W application. When the hat is put on 1 & 2 position, it is used for 5W application.

When the hat is put on 2 & 3 position, it is used for 3W application.

3) Selecting the Bias Resistor

at the soft start pin. (The internal 0.8V reference was overwritten by the programmed 0.2V to

reduce the sense voltage and increase the efficiency). The bias resistor is used to set the

operating current of the LumiLED as equation

F

FB

b

I

V

R

=

POWER SUPPLY DATA

For the standard evaluation board, the following chart shows the efficiency data for different

applications.

60

65

70

75

80

85

90

95

100

Single

Two

Three

Four

Five

Six

1W

3W

5W

Fig. 1 Efficiency data of the SP6134HVLED evaluation board