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设计DCDC反激式变压器开关电源,控制芯片选型问题

Other Parts Discussed in Thread: LM5020, UCC2897A

最近想设计一个DCDC反激式变压器开关电源,但不知如何选型控制芯片,求助TI工程师。

参数如下:

输入(DC)36~75V

输出(DC):1、+15V / 1A;

                       2、+24V / 1A(接反馈);

                       3、+24V / 1A;

                       4、+15V/300mA(辅助绕组)

功率:90W

频率:500KHz

最大占空比:80%左右