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ADP1046AACPZ-R7 数据表(PDF) 69 Page - Analog Devices |
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ADP1046AACPZ-R7 数据表(HTML) 69 Page - Analog Devices |
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69 / 88 page ![]() Data Sheet ADP1046A Rev. 0 | Page 69 of 88 Table 78. Register 0x4E—OUTD Rising Edge Setting (OUTD Pin) Bits Bit Name R/W Description [7:4] t 7 R/W These bits contain the four LSBs of the 12-bit t 7 time. This value is always used with the eight bits of Register 0x4D, which contains the eight MSBs of the t 7 time. Each LSB corresponds to 5 ns resolution. The entire switching period is divided into 40 ns time steps. If the t Rx and tFx of a PWM edge occur within the same 40 ns time step, the PWM output is 0 V. If the t Rx and tFx occur in different 40 ns time steps, the PWM output is set to the programmed value. The absolute maximum pulse width is t PERIOD − 5 ns. 3 Modulate enable R/W 1 = PWM modulation acts on the t 7 edge. 0 = no PWM modulation of the t 7 edge. 2 t 7 sign R/W 1 = negative sign. Increase of PWM modulation moves t 7 right. 0 = positive sign. Increase of PWM modulation moves t 7 left. 1 Reserved R/W Reserved. 0 Volt-second balance source selection R/W If this bit is set to 1, the OUTD rising edge is selected as the start of the integration period for volt-second balance. Table 79. Register 0x4F—OUTD Falling Edge Timing (OUTD Pin) Bits Bit Name R/W Description [7:0] t 8 R/W This register contains the eight MSBs of the 12-bit t 8 time. This value is always used with the top four bits of Register 0x50, which contains the four LSBs of the t 8 time. Each LSB corresponds to 5 ns resolution. The entire switching period is divided into 40 ns time steps. If the t Rx and tFx of a PWM edge occur within the same 40 ns time step, the PWM output is 0 V. If the t Rx and tFx occur in different 40 ns time steps, the PWM output is set to the programmed value. The absolute maximum pulse width is t PERIOD − 5 ns. Table 80. Register 0x50—OUTD Falling Edge Setting (OUTD Pin) Bits Bit Name R/W Description [7:4] t 8 R/W These bits contain the four LSBs of the 12-bit t 8 time. This value is always used with the eight bits of Register 0x4F, which contains the eight MSBs of the t 8 time. Each LSB corresponds to 5 ns resolution. The entire switching period is divided into 40 ns time steps. If the t Rx and tFx of a PWM edge occur within the same 40 ns time step, the PWM output is 0 V. If the t Rx and tFx occur in different 40 ns time steps, the PWM output is set to the programmed value. The absolute maximum pulse width is t PERIOD − 5 ns. 3 Modulate enable R/W 1 = PWM modulation acts on the t 8 edge. 0 = no PWM modulation of the t 8 edge. 2 t 8 sign R/W 1 = negative sign. Increase of PWM modulation moves t 8 right. 0 = positive sign. Increase of PWM modulation moves t 8 left. [1:0] Reserved R/W Reserved. Table 81. Register 0x51—SR1 Rising Edge Timing (SR1 Pin) Bits Bit Name R/W Description [7:0] t 9 R/W This register contains the eight MSBs of the 12-bit t 9 time. This value is always used with the top four bits of Register 0x52, which contains the four LSBs of the t 9 time. Each LSB corresponds to 5 ns resolution. The entire switching period is divided into 40 ns time steps. If the t Rx and tFx of a PWM edge occur within the same 40 ns time step, the PWM output is 0 V. If the t Rx and tFx occur in different 40 ns time steps, the PWM output is set to the programmed value. The absolute maximum pulse width is t PERIOD − 5 ns. It is recommended that the SR1 rising edge not be set between 80 ns and 115 ns when using the SR soft start. |
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