36
CM2115
Outputs
Software fuse – The software samples the measured current at a predefined
rate and compares this value to a set of current ranges. In these ranges
multipliers are specified which either increment or decrement the fuse value
by a multiplier. If the fuse value reaches the trip point, the output is shut off.
The fuse value cannot be decremented below the minimum fuse value. This
mechanism is disabled in the event of a hard short circuit
Software short circuit – The output has software short circuit detection. If the
output is PWM’d, the digital feedback is sampled at each falling edge. If the
output is simply turned on, the digital feedback is sampled at the set
frequency.
2.5 A High-Side Output w/CS Software Short Circuit Specifications
Item
MIN
NOM
MAX
UNIT
Digital feedback negative going threshold
-
-
2.63
V
Digital feedback positive going threshold
2.80
-
-
V
Sample rate
1
-
5000
Hz
Over temperature – If the temperature of the driver IC reaches the thermal trip
point, the output is disabled. The output will be re-enabled when the driver
cools down to an acceptable level.
6.1.5. High-Side Output Configuration
For software-controlled open load detection, the programmer has the ability to
choose when to bias the output through
the open load detection resistor. This
feature may be disabled by the programmer using software if the output is
connected to sensitive loads, such as LEDs.
