Pin settings LED7706
6/46
11
12
13
14
15
16
17
Table 2.
N°
1
2
3
4
5
6
7
8
9
10
18
19
20
21
22
23
24
ROW1
ROW2
ROW3
ROW4
ROW5
ROW6
PGND
Pin functions
Pin
COMP
RILIM
BILIM
FSW
MODE
AVCC
LDO5
VIN
SLOPE
SGND
OVSEL
LX
DIM
EN
FAULT
SYNC
SS
Function
Error amplifier output. A simple RC series between this pin and ground is needed to compensate the loop of the boost regulator.
Output generators current limit setting. The output current of the rows can be programmed connecting a resistor to SGND.
Boost converter current limit setting. The internal MOSFET current limit can be programmed connecting a resistor to SGND.
Switching frequency selection and external sync input. A resistor to SGND is used to set the desired switching frequency. The pin can also be used as external synchronization input. See
Section 5.1.5 on page 15 for details.
Current generators fault management selector. It allows to detect and manage
LEDs failures. See Section 5.3.2 on page 21 for details.
+ 5 V analog supply. Connect to LDO5 through a simple RC filter.
+ 5 V LDO output and power section supply. Bypass to SGND with a
1 μF ceramic capacitor.
Input voltage. Connect to the main supply rail.
Slope compensation setting. A resistor between the output of the boost converter and this pin is needed to avoid sub-harmonic instability.
Refer to
Section 6.1 on page 24 for details.
Signal ground. Supply return for the analog circuitry and the current generators.
Row driver output #1.
Row driver output #2.
Row driver output #3.
Row driver output #4.
Row driver output #5.
Row driver output #6.
Power ground. Source of the internal Power MOSFET.
Over-voltage selection. Used to set the desired OV threshold by an external divider. See
Section 5.1.4 on page 14
for details.
Switching node. Drain of the internal Power MOSFET.
Dimming input. Used to externally set the brightness by using a PWM signal.
Enable input. When low, the device is turned off. If tied high or left open, the device is turned on and a soft-start sequence takes place.
Fault signal output. Open drain output. The pin goes low when a fault condition
is detected (see Section 5.3.1 on page 21 for details).
Synchronization output. Used as external synchronization output.
Soft-start. Connect a capacitor to SGND to set the desired soft-start duration.
