TMI5810 -- High Efficiency Buck-Boost DC/DC Controller With Bi-directional Charge-discharge Function
Dec 09, 2022| In the silence of 3C digital industry explosive products in these years, because of the rise of "camping" portable power supply, has become one of the most popular single products in the current digital circle.
In portable power applications, its role is twofold: when the external power supply to charge it, it is the load; When it charges the load, it is the power supply. In the traditional bidirectional charging and discharging system, charging and discharging are respectively controlled by MCU of the battery pack. The whole process is quite complicated.
MI5810 is a high-efficiency synchronous voltage control chip that supports two-way charge-discharge function. Different from the traditional scheme, MCU only needs to control TMI5810 to realize the charge-discharge process in the portable power system using TMI5810, which greatly optimizes the system architecture.
The charge-discharge mode of TMI5810 is controlled by DIR signal: when DIR input is low level, the TMI5810 works in charging mode and charges from the adapter interface (VBUS end) to the battery (VBAT end). When DIR input is high voltage, the TMI5810 works in discharge mode and discharges from the battery (VBAT) to the adapter port (VBUS).
Dynamic adjustment of VBUS discharge voltage: In discharge mode, in addition to changing the partial voltage ratio of FB1, the VBUS voltage can also be dynamically adjusted through PWM signal. The voltage divider resistance of fixed FB1 is unchanged, and PWM signal with frequency of 10kHz~100kHz is input to PWM pin. The output voltage of VBUS is controlled by the duty ratio D of PWM signal.
Dual Type-c support two-way charge-discharge application demand growth, high efficiency, support two-way charge-discharge synchronous voltage control chip TMI5810 just in time!
