USA: Texas Instruments Inc. has introduced three wide-input voltage synchronous boost controllers with high efficiency and high power density. The LM5122Q multi-phase boost controller features the industry's widest input and output voltage range. The low quiescent-current TPS43060 and TPS43061 boost controllers feature 1-MHz operation and a small QFN package.
TI's new synchronous boost controllers increase efficiency by up to 10-percent 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 synchronization, hiccup-mode current limit and an adjustable line under-voltage lockout.
The LM5122Q is an AEC-Q100-qualified synchronous boost controller 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 stabilizers 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.
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