JAJSNJ1H May 2013 – December 2021 TPS65310A-Q1
PRODUCTION DATA
The BOOST converter is an asynchronous converter operating with a fixed switching frequency ƒSW = 0.98 MHz. It switches in phase with BUCK1. At low load, the boost regulator switches to pulse skipping.
The output voltage is programmable with external resistors.
The internal low-side switch can handle maximum 1-A current, and is protected with a current limit. In case of an overcurrent, the integrated cycle-by-cycle current-limit turns off the low-side FET when the current reaches ICLBOOST until the end of the given cycle. When the current-limit is reached in the beginning of the cycle for five consecutive cycles, the PWM is forced low for eight cycles to prevent uncontrolled current build-up.
The BOOST converter output voltage is monitored by a central independent voltage-monitoring circuit, which has an independent voltage-monitoring bandgap reference for safety reasons. If the VMONTH_L > VSENSE5 or VSENSE5 > VMONTH_H, the output is switched off and the BOOST_FAIL bit in the SPI PWR_STAT register is set. The BOOST can be reactivated by setting BOOST_EN bit in the PWR_CONFIG register.
In addition, the BOOST converter is thermally protected with a dedicated temperature sensor. If TJ > TOTTH, the BOOST converter is switched off and bit OT_BOOST in PWR_STAT register is set. Reactivation of the booster is only possible if the OT_BOOST bit is 0, and the booster enable bit in the PWR_CONFIG register is set to 1.