LB1978ATS16,a variable-frequency analog front-end introduced by Analog Company,can realize asynchronous and synchronous switching freely.This high-performance AFE chip is not only suitable for many mainstream SMPS topologies,but also provides powerful design freedom for engineers with its excellent flexibility and configurability,helping to realize more efficient and compact power supply solutions.Multiple analog front-ends LB1978ATS16 can also be configured in parallel in master-slave mode,so as to realize phase shift to reduce the ripple of SMPS and reduce the volume of inductor and capacitor.For sample testing and technical support,please contact the official agent Yingshang Microelectronics.
2.Frequency conversion advantages of analog front-end LB1978ATS16
The working frequency of LB1978ATS16 can be flexibly adjusted in a wide range from 50kHz to 450kHz,which enables designers to accurately optimize according to specific requirements such as efficiency,noise and peripheral component size.Whether pursuing the ultimate power density or meeting specific electromagnetic compatibility standards,the chip can handle it with ease.
LB1978ATS16 analog front-end provides a highly sophisticated control interface.Its external COMP pin(the input voltage range is 0.7V to 4.5V)can be directly used to adjust the PWM duty cycle and realize accurate power control.The programmable dead time control function integrated in the chip(through DT pin configuration)can adapt to different gate drivers and MOSFET.
3.Function of analog front-end LB1978ATS16
①VIN input voltage range:6V to 36V
②On-chip 5V linear regulator
③buck/charge or boost/discharge mode
(4)High PWM linearity,with 4VPP ramp voltage.
⑤Analog front-end programmable dead zone control
⑥Adjustable phase shift clock synchronous input or output.
⑦Analog front-end programmable soft start
Keywords : analog front-end
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