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STPM098C 数据表(PDF) 87 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 87 Page - STMicroelectronics |
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87 / 110 page ![]() Figure 73. DPS timing diagram t PHASE2_ADD PHASE2_DROP PHASE3_ADD PHASE3_DROP PHASE4_ADD PHASE4_DROP (ISENj−CFILT/VREF1) M j=1 PHASE5_ADD PHASE5_DROP IPHASE5 status IPHASE4 status IPHASE3 status IPHASE2 status IPHASE1 status PWM5 HIZ PWM4 ACTIVE PWM3 ACTIVE PWM4 ACTIVE PWM1 ACTIVE PWM4 HIZ PWM3 HIZ PWM2 HIZ PWM4 HIZ PWM3 HIZ PWM2 HIZ When DPS is active, a minimum number of active phases can be configured through a dedicated PMBus™ command as follows: Table 68. DPS minimum phase drop limit configuration bits NPH_PS02 NPH_PS01 NPH_PS00 Description 0 0 0 At least 1 active phase (default) 0 0 1 At least 1 active phase 0 1 0 At least 2 active phases 0 1 1 At least 3 active phases 1 0 0 At least 4 active phases 1 0 1 At least 5 active phases 1 1 0 At least 6 active phases 1 1 1 At least 7 active phases DPS minimum phase number (NPH_PS) should be always lower than or equal to the phase number assigned to the loop (PHASE_CFG). In case DPS minimum phase number is set higher than the assigned phase number, the NPH_PS configuration has the higher priority in defining the number of active phases. Example: if NPH_PS = 0x4 for loop 1 while PHASE_CFG = 0x2, then loop 1 will have 4 active phases instead of 2. During fast load increase DPS control is overridden to quickly support the current change. The DCO output period is monitored and if it falls below an adaptive threshold the controller instantly increases the number of active phases. If TDCO≤ 1N+1TNOMINALoccurs,theactivephasenumberoftheloopisincreasedby1,independentlyoftheDPS assertion. STPM098C Functional description DS14440 - Rev 1 page 87/110 |
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