STEVAL-ILL014V1 STMicroelectronics, STEVAL-ILL014V1 Datasheet - Page 10

• Manufacturer Part Number: STEVAL-ILL014V1
• Description: BOARD EVAL BASED ON STCS1
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ILL014V1

• Design Resources: STEVAL-ILL014V1 Gerber Files STEVAL-ILL014V1 Schematic STEVAL-ILL014V1 Bill of Materials
• Current - Output / Channel: 1.5A
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable
• Voltage - Input: 4.5 ~ 40V
• Utilized Ic / Part: STCS1
• Description/function: LED Driver Evaluation Module
• Product: Display Modules
• Core Chip: STCS1
• Output Current: 1.5A
• Dimming Control Type: PWM
• Development Tool Type: Hardware - Eval/Demo Board
• Mcu Supported Families: STCS1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: STCS1
• Other names: 497-8264

8
8.1
Figure 11. Reverse polarity condition
8.2
10/17
Application information
Reverse polarity protection
STCS1 must be protected from reverse connection of the supply voltage. Since the current
sunk from V
protect the chip. Care must be taken for the whole application circuit, especially for the
LEDs, in fact, in case a negative voltage is applied between V
voltage will be applied to the LED string that must have a total breakdown voltage higher
than the negative applied voltage in order to avoid any damage.
Thermal considerations
The STCS1 is able to control a LED current up to 1.5 A and able to sustain a voltage on the
drain pin up to 40 V. Those operating conditions are however limited by thermal constraints,
the thermal resistances shown in the
particular R
board under the pad. DFN8 and PowerSO-8 have an exposed die attach pad which
enhances the thermal conductivity enabling high power application.
The power dissipation in the device can be calculated as follow:
P
basing on this and on the thermal resistance and ambient temperature, the junction
temperature can be calculated as:
T
A typical application could be:
J
D
= R
– Input Voltage: 12 V;
– 3 white LEDs with an typical V
– LEDs current: 500 mA;
= (V
thJA
DRAIN
x P
thJA
CC
- V
D
pin is in the range of 450 µA a small diode connected to V
depends on the copper area and the number of layers of the printed circuit
+ T
FB
V
V
A
) x I
IN
IN
LED
BAT46
BAT46
or similar
or similar
+
+
+ (V
CC
x I
CC
F
Table 4: Thermal data
= 3.6 V;
PWM
PWM
EN
EN
)
V
V
DISC
DISC
CC
CC
GND
GND
DRAIN
DRAIN
FB
FB
section are the typical ones, in
IN
and GND, a negative
CC
is able to