The TPS9263x-Q1 devices are three-channel linear LED drivers with analog and PWM dimming
control. Their full-diagnostic and built-in protection capabilities make them the ideal solution
for variable-intensity LED lighting applications up to the medium-power range.
The design of this device suits it well for driving LEDs configured as a single string or
multiple strings within its power capability. A single device can drive up to three strings with
one to three LEDs in each string at a total current of up to 150 mA per channel. Outputs can be
paralleled to provide higher current drive capability to 450 mA.
In multiple-string applications, the device offers the advantage of having common-cathode
connection of the LED strings. So, the application needs is only a single return wire instead of
one return wire per LED string that a system with low-side current sense would need.
A single-LED short comparator allows detection of single LED failing with a short
circuit. Fault output can support bus connection topology between multiple ICs.
The included temperature monitor reduces the LED drive current if the IC junction
temperature exceeds a thermal threshold. One can program the temperature threshold through an
external resistor. One can disable the thermal current-monitor feature by connecting the TEMP pin
to ground. Output of the junction temperature as an analog voltage is available as a factory
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