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STPM098C 数据表(PDF) 38 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 38 Page - STMicroelectronics |
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38 / 110 page  Where: ∆LSB is the minimum voltage step [1 ms]. TON_DELAY are the dedicated PMBus™ configuration bits. Default value is TONDELAY=0x000.IncaseTONDELAY=0x000theenableddelayisdisabled. TONDELAYiscarriedoutbymeansofadigitalcounterclockedatTclk/125(31.25μs).Asaconsequence,sincethe VR_ENn value sampling is affected by a ±1Tclk uncertainty, TONDELAYisaffectedbya±31.25μsuncertainty. This effect is mostly visible at the default value when a delay between 0 μs and 31.25 μs shall be expected. Figure 29. TON_DELAY simplified block diagram VR_EN1 TON DELAY VR_EN2 TON DELAY Tclk = 31.25us LOOP 1 Enable LOOP 2 Enable VR_EN2 FLT VR_EN1 FLT DIGITAL VR_EN1 VR_EN2 Figure 30. TON_DELAY function timing diagram POR_DIG (internal signal) VREF1_UV_TH RESET PWMn VCC NVM READ & CRC VCC_UV_TH INT_RST (PMBus flag) VRn_EN FULL ON V t VREF1 DRIVE POR_ANA (internal signal) SAFE-HIZ T_VRn_EN_flt + TON_DELAY VREF2 MBIST DBIST ABIST VSENn VSENn Soft Start STPM098C Functional description DS14440 - Rev 1 page 38/110 |
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