STEVAL-ILL021V1 STMicroelectronics, STEVAL-ILL021V1 Datasheet - Page 6

• Manufacturer Part Number: STEVAL-ILL021V1
• Description: BOARD EVAL LCD BACKLIGHT LED7707
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ILL021V1

• Design Resources: STEVAL-ILL021V1 Bill of Material STEVAL-ILL021V1 Schematic
• Current - Output / Channel: 85mA
• Outputs And Type: 6, Non-Isolated
• Voltage - Output: 36 V
• Features: Dimmable, Extra 5V Output
• Voltage - Input: 4.5 ~ 36 V
• Utilized Ic / Part: LED7707
• Description/function: LCD backlight demonstration board
• Operating Voltage: 4.5 V to 36 V
• Product: Display Modules
• Core Chip: LED7707
• No. Of Outputs: 1
• Output Voltage: 36V
• Dimming Control Type: PWM
• Mcu Supported Families: LED7707
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• For Use With/related Products: LED7707
• Other names: 497-10044

Pin settings
2.2
6/47
Pin description
Table 2.
N°
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
SLOPE
OVSEL
COMP
MODE
SGND
ROW1
ROW2
ROW3
ROW4
ROW5
ROW6
PGND
FAULT
SYNC
RILIM
AVCC
BILIM
LDO5
FSW
DIM
VIN
Pin
EN
SS
LX
Pin functions
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
Current generators fault management selector. It allows to detect and manage
LEDs failures. See
+ 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
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 0 V threshold by an external
divider. See
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
Synchronization output. Used as external synchronization output.
Soft-start. Connect a capacitor to SGND to set the desired soft-start duration.
Section 6.1 on page 25
Section 5.1.4 on page 14
Section 5.3.1 on page 22
Section 5.3.2 on page 22
Function
for details.
Section 5.1.5 on page 14
for details.
for details).
for details.
for details.
LED7707