MAX16913A Maxim, MAX16913A Datasheet - Page 7

• Manufacturer Part Number: MAX16913A
• Description: The MAX16913/MAX16913A high-voltage high-side current-sense switches feature internal current limiting to prevent system damage due to fault conditions
• Manufacturer: Maxim

Figure 1. Short-Circuit Timing Diagram
switch is zero (see Figure 1). If the load current is
greater than I
old, the t
2). The resistor across IN and SENS sets I
cal value of 100mV/R
time have fixed values of 100ms (min) and 1500ms
(min), respectively.
It may happen that OUT is shorted to the battery due to
a fault in the system. The MAX16913/MAX16913A
detect this failure by comparing the OUT voltage and
the IN voltage before the switch turns on. Every time
the switch turns on, such as at the end of the retry time,
or once the thermal shutdown condition disappears,
the short-to-battery detection is performed. At this
LOAD CURRENT
LOAD CURRENT
2 x I
2 x I
SHDN
SHDN
I
SC
I
SC
SC
SC
SC
SC
BLANK
TURN-ON INTO A HARD SHORT CIRCUIT
TURN-ON INTO A TEMPORARY SHORT CIRCUIT
SC
t
t
BLANK
BLANK
, but does not reach the 2 x I
timer still begins counting (see Figure
_______________________________________________________________________________________
SENSE
Short-to-Battery Detection
(Ω). Blanking time and retry
Remote Antenna Current-Sense
SC
SC
to a typi-
thresh-
t
t
RETRY
RETRY
Amplifier and Switches
point, if the device detects any failure, the switch stays
off, and both SC and OL assert low (see Table 1).
Thermal shutdown circuitry protects the devices from
overheating. The switch turns off immediately when the
junction temperature exceeds +150°C (min) (see Table
1). The switch turns on again after the device tempera-
ture drops by approximately 15°C (typ).
The MAX16913/MAX16913A feature an active-high con-
trol input (SHDN) to put the devices in a low-power shut-
down mode. The devices turn off and consume only 5µA
(max) of shutdown current when SHDN is driven high.
RETRY
RETRY
Shutdown (SHDN)
Thermal Shutdown
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