ZHCSRQ4 august 2023 TPSM8S6C24
PRODUCTION DATA
- 1
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 說明（續(xù)）
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Average Current-Mode Control
- 8.3.2 Linear Regulators
- 8.3.3 AVIN and PVIN Pins
- 8.3.4 Input Undervoltage Lockout (UVLO)
- 8.3.5 Start-Up and Shutdown
- 8.3.6 Differential Sense Amplifier and Feedback Divider
- 8.3.7 Set Output Voltage and Adaptive Voltage Scaling (AVS)
- 8.3.8 Prebiased Output Start-Up
- 8.3.9 Soft Stop and (65h) TOFF_FALL Command
- 8.3.10 Power Good (PGOOD)
- 8.3.11 Set Switching Frequency
- 8.3.12 Frequency Synchronization
- 8.3.13 Loop Follower Detection
- 8.3.14 Current Sensing and Sharing
- 8.3.15 Telemetry
- 8.3.16 Overcurrent Protection
- 8.3.17 Overvoltage, Undervoltage Protection
- 8.3.18 Overtemperature Management
- 8.3.19 Fault Management
- 8.3.20 Back-Channel Communication
- 8.3.21 Switching Node (SW)
- 8.3.22 PMBus General Description
- 8.3.23 PMBus Address
- 8.3.24 PMBus Connections
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Maps
- 8.6.1 Conventions for Documenting Block Commands
- 8.6.2 (01h) OPERATION
- 8.6.3 (02h) ON_OFF_CONFIG
- 8.6.4 (03h) CLEAR_FAULTS
- 8.6.5 (04h) PHASE
- 8.6.6 (10h) WRITE_PROTECT
- 8.6.7 (15h) STORE_USER_ALL
- 8.6.8 (16h) RESTORE_USER_ALL
- 8.6.9 (19h) CAPABILITY
- 8.6.10 (1Bh) SMBALERT_MASK
- 8.6.11 (1Bh) SMBALERT_MASK_VOUT
- 8.6.12 (1Bh) SMBALERT_MASK_IOUT
- 8.6.13 (1Bh) SMBALERT_MASK_INPUT
- 8.6.14 (1Bh) SMBALERT_MASK_TEMPERATURE
- 8.6.15 (1Bh) SMBALERT_MASK_CML
- 8.6.16 (1Bh) SMBALERT_MASK_OTHER
- 8.6.17 (1Bh) SMBALERT_MASK_MFR
- 8.6.18 (20h) VOUT_MODE
- 8.6.19 (21h) VOUT_COMMAND
- 8.6.20 (22h) VOUT_TRIM
- 8.6.21 (24h) VOUT_MAX
- 8.6.22 (25h) VOUT_MARGIN_HIGH
- 8.6.23 (26h) VOUT_MARGIN_LOW
- 8.6.24 (27h) VOUT_TRANSITION_RATE
- 8.6.25 (29h) VOUT_SCALE_LOOP
- 8.6.26 (2Bh) VOUT_MIN
- 8.6.27 (33h) FREQUENCY_SWITCH
- 8.6.28 (35h) VIN_ON
- 8.6.29 (36h) VIN_OFF
- 8.6.30 (37h) INTERLEAVE
- 8.6.31 (38h) IOUT_CAL_GAIN
- 8.6.32 (39h) IOUT_CAL_OFFSET
- 8.6.33 (40h) VOUT_OV_FAULT_LIMIT
- 8.6.34 (41h) VOUT_OV_FAULT_RESPONSE
- 8.6.35 (42h) VOUT_OV_WARN_LIMIT
- 8.6.36 (43h) VOUT_UV_WARN_LIMIT
- 8.6.37 (44h) VOUT_UV_FAULT_LIMIT
- 8.6.38 (45h) VOUT_UV_FAULT_RESPONSE
- 8.6.39 (46h) IOUT_OC_FAULT_LIMIT
- 8.6.40 (47h) IOUT_OC_FAULT_RESPONSE
- 8.6.41 (4Ah) IOUT_OC_WARN_LIMIT
- 8.6.42 (4Fh) OT_FAULT_LIMIT
- 8.6.43 (50h) OT_FAULT_RESPONSE
- 8.6.44 (51h) OT_WARN_LIMIT
- 8.6.45 (55h) VIN_OV_FAULT_LIMIT
- 8.6.46 (56h) VIN_OV_FAULT_RESPONSE
- 8.6.47 (58h) VIN_UV_WARN_LIMIT
- 8.6.48 (60h) TON_DELAY
- 8.6.49 (61h) TON_RISE
- 8.6.50 (62h) TON_MAX_FAULT_LIMIT
- 8.6.51 (63h) TON_MAX_FAULT_RESPONSE
- 8.6.52 (64h) TOFF_DELAY
- 8.6.53 (65h) TOFF_FALL
- 8.6.54 (78h) STATUS_BYTE
- 8.6.55 (79h) STATUS_WORD
- 8.6.56 (7Ah) STATUS_VOUT
- 8.6.57 (7Bh) STATUS_IOUT
- 8.6.58 (7Ch) STATUS_INPUT
- 8.6.59 (7Dh) STATUS_TEMPERATURE
- 8.6.60 (7Eh) STATUS_CML
- 8.6.61 (7Fh) STATUS_OTHER
- 8.6.62 (80h) STATUS_MFR_SPECIFIC
- 8.6.63 (88h) READ_VIN
- 8.6.64 (8Bh) READ_VOUT
- 8.6.65 (8Ch) READ_IOUT
- 8.6.66 (8Dh) READ_TEMPERATURE_1
- 8.6.67 (98h) PMBUS_REVISION
- 8.6.68 (99h) MFR_ID
- 8.6.69 (9Ah) MFR_MODEL
- 8.6.70 (9Bh) MFR_REVISION
- 8.6.71 (9Eh) MFR_SERIAL
- 8.6.72 (ADh) IC_DEVICE_ID
- 8.6.73 (AEh) IC_DEVICE_REV
- 8.6.74 (B1h) USER_DATA_01 (COMPENSATION_CONFIG)
- 8.6.75 (B5h) USER_DATA_05 (POWER_STAGE_CONFIG)
- 8.6.76 (D0h) MFR_SPECIFIC_00 (TELEMETRY_CONFIG)
- 8.6.77 (DAh) MFR_SPECIFIC_10 (READ_ALL)
- 8.6.78 (DBh) MFR_SPECIFIC_11 (STATUS_ALL)
- 8.6.79 (DCh) MFR_SPECIFIC_12 (STATUS_PHASE)
- 8.6.80 (E3h) MFR_SPECIFIC_19 (PGOOD_CONFIG)
- 8.6.81 (E4h) MFR_SPECIFIC_20 (SYNC_CONFIG)
- 8.6.82 (ECh) MFR_SPECIFIC_28 (STACK_CONFIG)
- 8.6.83 (EDh) MFR_SPECIFIC_29 (MISC_OPTIONS)
- 8.6.84 (EEh) MFR_SPECIFIC_30 (PIN_DETECT_OVERRIDE)
- 8.6.85 (EFh) MFR_SPECIFIC_31 (DEVICE_ADDRESS)
- 8.6.86 (F0h) MFR_SPECIFIC_32 (NVM_CHECKSUM)
- 8.6.87 (F1h) MFR_SPECIFIC_33 (SIMULATE_FAULT)
- 8.6.88 (FAh) MFR_SPECIFIC_42 (PASSKEY)
- 8.6.89 (FBh) MFR_SPECIFIC_43 (EXT_WRITE_PROTECT)
- 8.6.90 (FCh) MFR_SPECIFIC_44 (FUSION_ID0)
- 8.6.91 (FDh) MFR_SPECIFIC_45 (FUSION_ID1)
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2
Detailed Design Procedure
- 9.2.2.1 Custom Design With WEBENCH? Tools
- 9.2.2.2 Switching Frequency
- 9.2.2.3 Output Voltage Setting (VSEL Pin)
- 9.2.2.4 Compensation Selection (MSEL1 Pin)
- 9.2.2.5 Output Capacitor Selection
- 9.2.2.6 Input Capacitor Selection
- 9.2.2.7 Soft Start, Overcurrent Protection, and Stacking Configuration (MSEL2 Pin)
- 9.2.2.8 Enable and UVLO
- 9.2.2.9 ADRSEL
- 9.2.2.10 BCX_CLK and BCX_DAT
- 9.2.3 Application Curves
- 9.2.4
Two-Phase Application
- 9.2.4.1 Design Requirements
- 9.2.4.2
Two-Phase Detailed Design Procedure
- 9.2.4.2.1 Switching Frequency
- 9.2.4.2.2 Output Voltage Setting (VSEL Pin)
- 9.2.4.2.3 Compensation Selection (MSEL1 Pin)
- 9.2.4.2.4 Output Capacitor Selection
- 9.2.4.2.5 Input Capacitor Selection
- 9.2.4.2.6 GOSNS/Loop Follower Pin of Loop Follower Devices
- 9.2.4.2.7 Soft Start, Overcurrent Protection, and Stacking Configuration (MSEL2 Pin)
- 9.2.4.2.8 Enable, UVLO
- 9.2.4.2.9 VSHARE Pin
- 9.2.4.2.10 SYNC Pin
- 9.2.4.2.11 VOSNS Pin of Loop Follower Devices
- 9.2.4.2.12 Unused Pins of Loop Follower Devices
- 9.2.4.3 Two-Phase Application Curves
- 9.3 Power Supply Recommendations
- 9.4 Layout
- 10Device and Documentation Support
- 11Mechanical, Packaging, and Orderable Information
8.3.1.2 Current Error Integrator
The current error integrator adjusts the modulator control voltage to match the sensed inductor current, Isns, to the current voltage at the VSHARE pin. The integrator is tuned through the the following parameters in (B1h) USER_DATA_01 (COMPENSATION_CONFIG):
- GMI
- RVI
- CZI
- CPI
- CZI_MUL
Thanks to the natural integration of the 1/f function of the current control gain, the bandwidth of the current control loop can be adjusted with the mid-band gain of the integrator, GMI × RVI.
The current loop crossover occurs at the frequency when the full loop gain is equal to 1 according to Equation 3:
Solving for the mid-band gain of the current loop, the user finds Equation 4:
While the Nyquist Theorem suggests that a bandwidth of (?)* fSW is possible, inductor tolerances and phase delays in the current sense, modulator, and H-bridge power FETs make fSW/4 a more practical target, which simplifies the target current loop mid-band gain to achieve a current loop bandwidth of fSW/4 to Equation 5:
An integrator from DC to the low-frequency zero, RVI × CZI, compensates for the valley voltage of the modulator ramp and the nominal offset of the output voltage. A high-frequency filter pole, RVI × CPI between half the switching frequency and the switching frequency reduces high-frequency noise from VSHARE and minimizes pulse-width jitter.
To avoid loop interactions, the integrating zero frequency must be below the voltage loop crossover frequency, while the high-frequency pole must be between 1/2 the switching frequency and the switching frequency to limit high-frequency noise and jitter in the current loop without imposing additional phase loss in the voltage loop.
The closed loop average current mode control allows the current sense amplifier, on-time modulator, H-bridge power FETs, and inductor to operate as a transconductance amplifier with forward gain of 1/CSA or 162.5 A/V with a bandwidth equal to Fcoi.