Rainbow Electronics MAX4880 - Manual (Page 6)

MAX4880
Overvoltage-Protection Controller with
Internal Disconnect Switch
6 _______________________________________________________________________________________
Pin Description (continued)
PIN NAME FUNCTION
10 FLAGV
Active-Low, Open-Drain-Fault Flag Output. FLAGV goes low when either an overvoltage or undervoltage
fault occurs at IN. FLAGV is disabled when EN goes high. During startup, FLAGV has a delay of 50ms
after V GATE > 0.3V, before being initially driven high.
— EP Exposed Pad. EP is internally connected to GND. Do not use EP as the only electrical ground connection.
V
IN
V GATE
1.2V
V UVLO
0.3V
t START
2.4V
t
DELAY
8V
t GON
5V
V FLAGV
Figure 1. Startup Timing Diagram
V IN
V
GATE
V OVLO
0.3V
t GOFF
0.4V
t FLAG 5V
8V
V FLAGV
Figure 2. Overvoltage Fault Timing Diagram
V IN
I
GATE
V OVLO
80%
t OVP
0V
Figure 3. Power-Up Overvoltage Timing Diagram
V GATE
0.3V
t DIS
2.4V V EN
Figure 4. Disable Timing Diagram