Triple 60mA Linear LED Controller
Preliminary Information - Jan 21, 2015
E522.84/85/86/87
5.4 State Diagram
Global, Prio 3:
Junction Over-
Temperature
VS RESET
Thermal
Shutdown
Global, Prio 1:
V
VS < VVS,ERR
VVS < VVS,ERR
RUN active low
LED Outputs pulldown
IR Driver off
RUN active low
LED [x] pulldown
IR Driver disabled
ERR[2:0] = 000
Global, Prio 4:
RUN pullup enabled
and RUN state 'Low'
Overtemperature
Recovery
Global, Pro 2:
ENA Low
VVS > VVS,ERR
Active,
Selective
Diagnosis
ENA High
ERR flag stored
for channel [y]
Sleep Mode
Standby Mode
ENA High
No ERR stored
RUN active low
All LED pulldown
IR disabled
ERR[2:0] unmodified
Re-Start Counter reset
RUN pullup enabled
LED [x] pulldown
IR Driver off
RUN active low
LED, IR [y] enabled for 64us *)
other channels in [z] state
ERR[2:0] = 000
RUN
High
Re-Start
ERR[y]
After 64us:
Channel [y] ok,
ERR flag
Counter
still present,
Finished
( 6ms )
cleared
Standby
„Single Lamp“
Mode, Counting
Active,
Full Diagnosis
ERR at channel [y]
RUN pullup enabled
LED[x], IR driving
64us Diagnosis Tolerance
for starting channels
RUN active low
All LED Outputs pulldown
IR Driver disabled
→ ERR [y] is set
Re-Start Counter running
ERR detected
at channel [y]
After 64us:
No ERR[x]
detected
Index Usage:
x: Active Channel [2:0]
y: Faulty Channel [2:0]
z: Disabled Channel [2:0]
Active Mode.
Normal Operation
*) „LED Open“ error
diagnosis is active
only in case VVS > VTST
RUN High
RUN pullup enabled
LEDx,IR driving'
Diagnosis active *)
Figure 3. State Diagram E522.84/85/86/87
This document contains information on a pre-production product. Elmos Semiconductor AG reserves the right to change specifications and information herein without notice.
Elmos Semiconductor AG
Data Sheet
QM-No.: 25DS0137E.00
11/20
ELMOS [ ELMOS SEMICONDUCTOR AG ]
