Rainbow Electronics MAX5970 - Manual (Page 19)

0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
MAX5970
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Figure 2. Operation and Fault-Management Flowchart for One Channel
ARE 2 OR MORE OF 3
ENABLE SET?
READ MODE, PROT, A0,
A1, RETRY, HWEN, IRNG_
INPUTS, CLEAR FLAGS
V IN > 2.7V
NO NO
CHANNEL ENABLED
START CIRCULAR BUFFER
ENABLE GATE_ PULLUP
MON_ > UV1
AND UV2?
NO
ASSERT PG_ AFTER ADJUSTABLE DELAY
YES
NORMAL OPERATION
CIRCUIT-BREAKER
TRIP?
NO
CONTINUOUSLY SAMPLE VOLTAGE AND
CURRENT, UPDATE MIN-MAX VALUES,
HANDLE I
2 C COMMUNICATIONS,
STORE SAMPLES TO CIRCULAR BUFFERS...
ARE 2 OR MORE OF
3 ENABLE SET?
NO
UV, OV, OR OC
WARNING OR
CRITICAL
NO
SET FAULT_, CLEAR PG_, AND SHUTDOWN
AFFECTED CHANNEL(S) PER MODE
BUFFER
STOP-DELAY
EXPIRED
NO
STOP CIRCULAR BUFFER
YES
CLEAR PG_ AND
SHUTDOWN AFFECTED
CHANNEL(S) PER MODE INPUT
RETRY = V DREG ? WAIT FOR
AUTORETRY DELAY
YES
READ IRNG_ INPUTS,
CLEAR FLAGS, CLEAR ALERT,
CLEAR FAULT_
CHANNEL
ENABLED
NO
ARE 2 OR MORE OF
3 ENABLE SET?
ARE 2 OR MORE OF
3 ENABLE SET?
NO
NO
YES
PROT INPUT = GND
SET ALERT, PG_
PER PROT INPUT
YES
YES
NORMAL
OPERATION
NO