STP1612PW05 STMicroelectronics, STP1612PW05 Datasheet - Page 29

• Manufacturer Part Number: STP1612PW05
• Description: 16-channel LED driver with 16-bit PWM, 8-bit gain and full LED error detection
• Manufacturer: STMicroelectronics

Specifications of STP1612PW05

• Supply Voltage: 3.3 V or 5 V
• Max Clock Frequency: 30 MHz

STP1612PW05
17.2
Figure 19. Solution with separated supply voltage for red LEDs
Setting grayscale brightness
As explained in section 8, the brightness of each channel can be adjusted using 12 or 16 bit
per channel PWM control scheme, resulting in respectively 4095 or 65535 steps, from 0% to
100% brightness.
The brightness level of each output can be calculated as:
Where GS
up to 4095 or 65535, whereas GS
(12bit) or 65535 (16bit).
So, once the brightness level for the channel n is defined, according to the bit “D” of the
configuration register (see section 8), the GS
value into a binary word, the correct string to load into the register is achieved (see
Figure 20
).
value,n
to SDI of
to SDI of
the next
the next
device
device
V
V
V
from SDO of
from SDO of
the previous
the previous
V
V
V
O,green
O,green
O,green
O,blue
O,blue
O,blue
device
device
is the programmed grayscale value for OUTn (n from 0 to 15), which can be
SDO
SDO
SDI
SDI
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
V
V
V
V
V
V
V
V
V
V
V
V
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
V
V
V
V
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
V
V
V
……
……
……
……
……
……
……
……
F,green
F,green
F,green
VLED_RED = 3.3V
VLED_RED = 3.3V
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
V
V
V
Doc ID 15819 Rev 5
F,red
F,red
F,red
Brightness
to SDI of
to SDI of
the next
the next
device
device
V
V
V
from SDO of
from SDO of
the previous
the previous
F,blue
F,blue
F,blue
max
device
device
SDO
SDO
SDI
SDI
is the maximum grayscale value programmable: 4095
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
O UT0
%
VLED_RED
VLED_RED
VLED_RED
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
V
V
V
V
V
V
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
VLED
VLED
VLED
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,red
O,red
O,red
=
value,n
……
……
……
……
……
……
……
……
……
……
……
……
GS
GS
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
value
max
can be calculated. Then, converting this
to SDI of
to SDI of
the next
the next
device
device
n ,
from SDO of
from SDO of
the previous
the previous
device
device
⋅
100
SDO
SDO
SDI
SDI
OUT0
OUT0
OUT0
OUT0
OUT0
OUT0
OUT0
OUT0
OUT0
OUT0
OUT0
OUT0
VLED
VLED
5V
5V
V
V
V
V
V
V
V
V
V
V
V
V
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
V
V
V
V
V
V
V
V
V
V
V
V
F,b lue
F,b lue
F,b lue
F,b lue
F,b lue
F,b lue
F,b lue
F,b lue
F,b lue
F,b lue
F,b lue
F,b lue
O, blue
O, blue
O, blue
O, blue
O, blue
O, blue
O, blue
O, blue
O, blue
O, blue
O, blue
O, blue
……
……
……
……
……
……
……
……
……
……
……
……
Application information
regulator
regulator
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
OUT15
voltage
voltage
VLED = 5V
VLED = 5V
VLED_RED
VLED_RED
3.3V
3.3V
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