DS3881 MAXIM [Maxim Integrated Products], DS3881 Datasheet - Page 16
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DS3881
Manufacturer Part Number
DS3881
Description
Single-Channel Automotive CCFL Controller
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
1.DS3881.pdf
(28 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS3881-ES
Manufacturer:
DALLAS
Quantity:
20 000
Single-Channel Automotive CCFL Controller
Figure 8. Fault-Handling Flowchart
16
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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?
[REGULATE LAMP
OVD THRESHOLD]
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]
[64 LAMP CYCLES]
LAMP OUT TIMEOUT
OVERVOLTAGE
NO
FAULT COUNTER = 15?
YES
SET LOUT_L
STATUS BIT
STATUS BIT
STATUS BIT
SET STO_L
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