SLVSDA7E February 2017 – August 2019 TPS61178
The TPS61178x family is a synchronous boost converter designed for delivering the switch peak current up to 10 A and output voltage reaching to 20 V. The TPS61178x family operates at a fixed frequency pulse-width modulation (PWM) at the moderate to heavy load currents. At the light load current, the TPS61178 operates in the PFM mode while the TPS611781 operates in the Forced PWM mode. The PFM mode brings the high efficiency crossing the entire load range while the Forced PWM mode can avoid the noise interference at the light load.
With the peak current mode control scheme, the TPS61178x provides the excellent line and load transient response with the minimal output capacitance. The external loop compensation brings the flexibility to use a wider range of the inductor and output capacitor combinations.
The TPS61178x supports the adjustable switching frequency up to 2.2 MHz. The device implements a cycle-by-cycle current limit to protect the device from overload during the boost operation phase. Additionally, if the output current further increases and exceeds the short current threshold or the output voltage drops below the short threshold. The TPS61178x triggers the hiccup short protection and recovers automatically once the short condition releases.
Additionally, the TPS61178x provides the gate driver for the external FET to isolate the output from input end during shutdown.