ds3881et-r-c Maxim Integrated Products, Inc., ds3881et-r-c Datasheet - Page 16
![no-image](/images/no-image-200.jpg)
ds3881et-r-c
Manufacturer Part Number
ds3881et-r-c
Description
Ds3881 Single-channel, Automotive Ccfl Controller
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS3881ET-R-C.pdf
(28 pages)
- Current page: 16 of 28
- Download datasheet (396Kb)
Single-Channel Automotive CCFL Controller
Figure 8. Fault-Handling Flowchart
16
____________________________________________________________________
LAMP OVERCURRENT
[INSTANTANEOUS IF
LOCE BIT AT CR1.0]
ENABLED BY THE
STATUS BIT
SET LOC_L
[RAMP AND REGULATE TO
RESET FAULT COUNTER
CURRENT BOUNDED BY
IF LAMP REGULATION
THRESHOLD IS MET
AND FAULT OUTPUT
INVERTER SUPPLIES
AT PROPER LEVELS?
OVD THRESHOLD]
[REGULATE LAMP
LAMP VOLTAGE]
STRIKE LAMP
RUN LAMP
DEVICE AND
STATUS BIT
FAULT_RT
CLEAR
YES
MOSFET GATE DRIVERS ENABLED
[1024 LAMP CYCLES]
FAULT WAIT
LAMP STRIKE TIMEOUT
[SEE REGISTER SSP1]
[SEE REGISTER SSP1]
LAMP OUT TIMEOUT
[64 LAMP CYCLES]
OVERVOLTAGE
NO
FAULT COUNTER = 15?
YES
SET LOUT_L
STATUS BIT
STATUS BIT
SET STO_L
STATUS BIT
SET OV_L
YES
[ACTIVATE FAULT OUTPUT]
AUTORETRY ENABLED?
FAULT_RT STATUS BIT
[ARD BIT AT CR1.5]
INCREMENT FAULT
AND FAULT_RT
COUNTER / SET
FAULT STATE
SET FAULT_L
STATUS BITS
NO
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