SLUSCX8C March 2019 – March 2021 TPS92682-Q1
PRODUCTION DATA
In BOOST and SEPIC topologies, the Overvoltage threshold is programmed using a resistor divider, RFBx1 and RFBx2, from the output voltage VO to GND. If the LEDs are referenced to a potential other than GND, as in the BUCK-BOOST, the output voltage is sensed and translated to ground by using a PNP transistor and level-shift resistors, as shown in Figure 8-2 for the channel-2. The Overvoltage turnoff threshold, VO(OV), is:
Boost:
Buck and Buck-Boost:
In CC mode, VOV(THR) = 1.24 V (typ), when CHxOV register is set to 000.
The Overvoltage hysteresis, VOV(HYS), is:
where
The corresponding undervoltage fault threshold, VO(UV), is: