STP1612PW05 datasheet(20/35 Pages) STMICROELECTRONICS

No de pièce	STP1612PW05

Description	16-channel LED driver with 16-bit PWM, 8-bit gain and full LED error detection

PDF	35 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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20 / 35 page

Error detection conditions

STP1612PW05

20/35

Doc ID 15819 Rev 4

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 the

image quality will not be impacted since the test duration is short (0.5 µs typ).

To perform the open-circuit, short-circuit error detection a channel must be on, the

command “enable error detection” starts the detection. After 0.5 µs (typ) the command “read

error status code” allows to get the status from the serial output (SDO).

Note:

Where: IO = the output current programmed by the REXT, IODEC = the detected output

current in detection mode

Figure 11.

Detection circuit

Table 14.

Detection conditions (VDD = 3.3 to 5 V temp. range -40 to 125 °C)

SW-1 or

SW-3b

Open line or output short to GND

detected

==> IODEC ≤ 0.5 x IO

SW-2 or

SW-3a

Short on LED or short to V-LED

detected

==> VO ≥ 2.3 V

STP1612PW05

STP1612PW05 Fiches technique(PDF) 20 Page - STMicroelectronics