Texas Instruments introduced three wide-input-voltage synchronous boost controllers with high efficiency and high power density.
The LM5122Q multi-phase boost controller features what TI claims are the industry’s widest input and output voltage ranges, while the low-quiescent-current TPS43060 and TPS43061 feature 1 MHz operation and a small QFN package.
The ICs aim to increase efficiency by up to 10% over non-synchronous boost controllers by replacing the freewheeling diode with a synchronous switch. Lossless inductor DCR current sensing further improves efficiency and reduces heat dissipation to save board space and lower bill of materials cost. Each boost controller features thermal shutdown, frequency synchronisation, hiccup-mode current limit and an adjustable line under-voltage lockout.
The LM5122Q is an AEC-Q100-qualified device with a 3 V to 65 V input and up to 100 V output voltage range. The controller can be configured easily for interleaved multi-phase operation, which is required for high-power applications like start-stop voltage stabilisers and high-power audio amplifiers. A powerful 3 A gate drive circuit supports voltages up to 16 V, enabling flexibility to tune the step-up DC-DC for efficiency and size.
The TPS43060 and TPS43061 have an input voltage range from 4,5 V to 38 V and an output voltage range of up to 60 V. The TPS43060 provides a 7,5 V gate drive, which drives a broad range of low-cost MOSFETs. The TPS43061 provides a 5,5 V gate drive, optimised for low-Qg MOSFETs.
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