HongKong Wei Ya Hua Electronic Technology Co.,Limited
HongKong Wei Ya Hua Electronic Technology Co.,Limited.
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Texas Instruments LM5152x-Q1 Low IQ Synchronous Boost Controller is a wide input range synchronous boost controller that employs peak current mode control. The device features a low shutdown IQ and a low IQ sleep mode, minimizing battery drain at no and light load conditions. The device also supports an ultra-low IQ deep sleep mode with bypass operation, eliminating the need for an external bypass switch when the supply voltage exceeds the boost output regulation target. The output voltage can be dynamically programmed by using the tracking function.
The wide input range of the device supports automotive cold-crank and load dump. The minimum input voltage can be as low as 0.8V when BIAS is equal to or greater than 3.8V. The switching frequency is dynamically programmed with an external resistor from 100kHz to 2.2MHz. Switching at 2.2MHz minimizes AM band interference and allows a small solution size and fast transient response. Controller architectures simplify thermal management at harsh ambient temperature conditions compared to converter architectures.
The Texas Instruments LM5152x-Q1 has built-in protection features such as peak current limit, which is constant over VIN, overvoltage protection, and thermal shutdown. External clock synchronization, programmable spread spectrum modulation, and a lead-less package with minimal parasitic help reduce EMI and avoid cross-talk. Additional features include line UVLO, FPWM, diode emulation, DCR inductor current sensing, programmable soft-start, and a boost status indicator.
