AN2810

LED7707 demonstration board

Doc ID 14893 Rev 1

5/17

2

LED7707 demonstration board

The LED7707 demonstration board has been designed to manage six strings of 8 to 10

white LEDs each.

Table 1 summarizes the board features and Figure 2 shows the LED7707 demonstration

board schematic. The input voltage range is limited to 32 V because of the 35 V rated input

capacitor. An extended operating input voltage range (up to 36 V) can be achieved by using

a 50 V-rated MLCC.

Figure 2.

LED7707 demonstration board schematic

Table 1.

LED7707 performance summary

Parameter

Conditions

Value

Minimum input voltage

6 V

Maximum input voltage

32 V

Output voltage

Output OVP threshold

Ω, R2=16 kΩ

38 V

Internal MOSFET OCP

Ω

3.3 A

Boost section switching frequency

FSW pin to AVCC

660 kHz

Ω

825 kHz

Minimum dimming on-time

10 µs

Output current (each row)

Ω

75 mA

Output current accuracy

±2%

Efficiency

91%