MAX4893BETB+T Maxim Integrated Products, MAX4893BETB+T Datasheet - Page 8

• Manufacturer Part Number: MAX4893BETB+T
• Description: IC CTLR OVP CURR LIMIT 10-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX4893BETB+T

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 10-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX4881–MAX4884/MAX4893B have an overcur-
rent-fault flag output (FLAGI) to indicate a current fault
condition. FLAGI asserts low to indicate a fault when the
current reaches the current limit for longer than the 50ms
blanking time. Toggle IN or CB or EN to release FLAGI
latched condition. FLAGI does not assert if the current-
limit fault occurs for less than the blanking time (Figure 5).
FLAGI is disabled when EN goes high. When CB is low,
the switch opens, but FLAGI is not active.
FLAGI is an open-drain active-low output. Connect a
pullup resistor from FLAGI to the logic I/O voltage of the
host system or to any voltage source up to 6V.
When the forward- or reverse-current-limit threshold is
exceeded, t
Overvoltage Protection Controllers with
Current Limit in TDFN
8
Figure 5. Current-Limit Fault Timing
CURRENT
CURRENT
SWITCH
SWITCH
STATUS
STATUS
(a) MAX4881/MAX4882/MAX4883B/MAX4884B/MAX4893B
(b) MAX4883C/MAX4884C
FLAGI
FLAGI
_______________________________________________________________________________________
LOAD
LOAD
ON
ON
BLANK
Overcurrent Flag Output ( FLAGI )
t
t
BLANK
BLANK
timer begins counting. The timer
t
t
Current-Limit Switch
BLANK
BLANK
OFF
CURRENT
CURRENT
LIMIT
LIMIT
Figure 6. Latchoff Fault Blanking (MAX4881/MAX4882/
MAX4883B/MAX4884B/MAX4893B
PIN STATUS
CURRENT
CURRENT
CURRENT
STATUS
SWITCH
SWITCH
STATUS
STATUS
SWITCH
STATUS
STATUS
STATUS
STATUS
STATUS
FLAGI
FLAGI
FLAGI
LOAD
LOAD
LOAD
EN
CB
IN
OFF
OFF
OFF
ON
ON
ON
t
BLANK
t
t
BLANK
BLANK
UVLO
t
(c)
(a)
(b)
BLANK
t
t
BLANK
BLANK