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DC/DC CONVERTER HAVING A STEP-UP CONVERTER SUPPLYING A STEP-DOWN CONVERTER
DC/DC CONVERTER HAVING A STEP-UP CONVERTER SUPPLYING A STEP-DOWN CONVERTER
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机译:具有升压转换器的DC / DC转换器提供降压转换器的DC / DC转换器
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摘要
There is described a DC-DC converter having a Step-Up stage (10) supplying a Step-Down stage (20). A common Step-Down controller is designed and configured such that a single reference voltage (VREF) is compared to the output voltage (VOUT_SD) of the Step-Down stage by a single comparator (61), producing a single error signal (VERROR). The error signal is then compared by comparators (62) and (63) to the two different saw signals (SAW1) and (SAW2) respectively in order to generate first and second pulse-width modulated signals (PWM_SU) and (PWW_SD) respectively that are inputted a the control unit (65) of the controller which, in turn, generates a first pair of control signals (φ1,φ2) and a second pair of control signals (φ3,φ4), which control switching of the Step-Up stage (10) supplying a Step-Down stage (20).
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