STP1612PW05 STMicroelectronics, STP1612PW05 Datasheet - Page 20

• 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

Error detection conditions
10
Note:
20/41
Error detection conditions
The STP1612PW05 can detect open channels (OD) and LED short-circuits (SD).
The detection circuitry performs open- and short-circuit detection simultaneously and needs
that all channels must be on. However the short test duration (0.5 µs typ) does not impact
the image quality.
According to
After 0.5 µs (typ) the faults detection has already been carried out and, through the
command “Read Error Status Code”, the status is available on the serial output (SDO).
A bit set to "1" in the Error Status Code represents a channel considered good, whereas a
"0" represents a failed output (open/short).
Figure 11
Figure 11. Error detection process
The
and how the detection is performed.
Table 13.
Where: I
current in detection mode
SDO
SDO
Table 13
LE
LE
CLK
CLK
SW-1 or
SW-2 or
SW-3b
SW-3a
O
describes the error detection process.
= the output current programmed by the R
Detection conditions (V
Table
and
from SDI
from SDI
Figure 12
Open line or output short to GND
detected
Short on LED or short to V-LED
detected
“Enable Error Detection”
“Enable Error Detection”
11, the command “Enable Error Detection” starts the diagnostic process.
command
command
explains the fault conditions detected by the diagnostic circuitry
channels (typ 0.5µs)
channels (typ 0.5µs)
Doc ID 15819 Rev 5
detection of faulty
detection of faulty
don’t care
don’t care
DD
= 3.3 to 5 V temp. range -40 to 125 °C)
EXT
don’t care
don’t care
, I
==> I
==> V
ODEC
ODEC
O
“Read Error Status Code”
“Read Error Status Code”
≥ 2.3 V
= the detected output
≤ 0.5 x I
command
command
O
ERROR STATUS CODE
ERROR STATUS CODE
STP1612PW05