NCV7680 Datasheet, PDF (5/20 Pages) ON Semiconductor – Linear Current Regulator and Controller for Automotive LED Rear Combination Lamps

NCV7680
Table 1. APPLICATION I/O TRUTH TABLE (FB = V_ref) (Reference Figure 2)
Stop Input
Tail Input
OUTX Current
(1−8)
0
0
OFF
1
0
I_STOP
1
0
I_STOP
0
1
PWM
1
1
I_STOP
1
1
I_STOP
* Open Circuit, R_STOP Current Limit, and Set Back Current Limit down 20%
** Pullup resistor to DIAG
*** OPEN CIRCUIT = Any string open
0 = LOW
1 = HIGH
Fault State*
−
NORMAL
OPEN CIRCUIT***
DO NOT CARE
NORMAL
OPEN CIRCUIT***
DIAG State
HIGHZ**
LOW
HIGH**
HIGH**
LOW
HIGH**
TAIL
STOP
HIGHZ
DIAG
Open String Occurs
Open String Removed
Figure 6. DIAG Timing Diagram
Open String Occurs
http://onsemi.com
5