STCS1APHR STMicroelectronics, STCS1APHR Datasheet - Page 12
![IC LED DRIVR PWM CONTROL PWRSO-8](/photos/7/37/73765/stcs1aphr_sml.jpg)
STCS1APHR
Manufacturer Part Number
STCS1APHR
Description
IC LED DRIVR PWM CONTROL PWRSO-8
Manufacturer
STMicroelectronics
Type
PWM Controlr
Datasheet
1.STCS1APUR.pdf
(19 pages)
Specifications of STCS1APHR
Constant Current
Yes
Topology
PWM
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Automotive
Type - Secondary
White LED
Voltage - Supply
4.5 V ~ 40 V
Mounting Type
Surface Mount
Package / Case
PowerSO-8
Operating Temperature
-40°C ~ 125°C
Current - Output / Channel
1.5A
Internal Switch(s)
Yes
High Level Output Current
1500 mA
Operating Supply Voltage
4.5 V to 40 V
Maximum Supply Current
3 uA
Maximum Operating Temperature
+ 150 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
For Use With
497-8264 - BOARD EVAL BASED ON STCS1497-5960 - BOARD DEMO FOR STCS1P
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Frequency
-
Efficiency
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
497-6915-2
STCS1APHR
STCS1APHR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
STCS1APHR
Manufacturer:
RICHTEK
Quantity:
1 001
8
8.1
Figure 15. Reverse polarity condition
8.2
12/19
Application information
Reverse polarity protection
STCS1A 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 STCS1A 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
in particular R
circuit 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
= (V
thJA
DRAIN
x P
CC
- V
thJA
D
pin is in the range of 450 µA a small diode connected to V
V
V
V
V
+ T
IN
IN
IN
IN
FB
depends on the copper area and the number of layers of the printed
A
) x I
BAT46
BAT46
or similar
or similar
or similar
or similar
+
+
+
+
LED
+ (V
CC
x I
CC
F
=3.6 V;
PWM
PWM
PWM
PWM
EN
EN
EN
EN
V
V
V
V
)
CC
CC
CC
CC
DISC
DISC
DISC
DISC
SLOPE
SLOPE
SLOPE
SLOPE
Thermal data
GND
GND
GND
GND
DRAIN
DRAIN
DRAIN
DRAIN
FB
FB
FB
FB
IN
section are the typical ones,
and GND, a negative
CC
is able to