SLVSH95 July 2024 TPS546C25
ADVANCE INFORMATION
- 1
- 1 Features
- 2 Applications
- 3 Description
- 4 Pin Configuration and Functions
- 5 Specifications
-
6 Detailed Description
- 6.1 Overview
- 6.2 Functional Block Diagram
- 6.3
Feature Description
- 6.3.1 D-CAP4 Control
- 6.3.2 Internal VCC LDO and Using an External Bias on VCC Pin and VDRV Pin
- 6.3.3 Input Undervoltage Lockout (UVLO)
- 6.3.4 Differential Remote Sense and Internal, External Feedback Divider
- 6.3.5 Set the Output Voltage and VORST#
- 6.3.6 Start-Up and Shutdown
- 6.3.7 Dynamic Voltage Slew Rate
- 6.3.8 Set Switching Frequency
- 6.3.9 Switching Node (SW)
- 6.3.10 Overcurrent Limit and Low-side Current Sense
- 6.3.11 Negative Overcurrent Limit
- 6.3.12 Zero-Crossing Detection
- 6.3.13 Input Overvoltage Protection
- 6.3.14 Output Overvoltage and Undervoltage Protection
- 6.3.15 Overtemperature Protection
- 6.3.16 Telemetry
- 6.4 Device Functional Modes
- 6.5 Programming
-
7 Register Maps
- 7.1 Conventions for Documenting Block Commands
- 7.2 (01h) OPERATION
- 7.3 (02h) ON_OFF_CONFIG
- 7.4 (03h) CLEAR_FAULTS
- 7.5 (04h) PHASE
- 7.6 (09h) P2_PLUS_WRITE
- 7.7 (0Ah) P2_PLUS_READ
- 7.8 (0Eh) PASSKEY
- 7.9 (10h) WRITE_PROTECT
- 7.10 (15h) STORE_USER_ALL
- 7.11 (16h) RESTORE_USER_ALL
- 7.12 (19h) CAPABILITY
- 7.13 (1Bh) SMBALERT_MASK
- 7.14 (20h) VOUT_MODE
- 7.15 (21h) VOUT_COMMAND
- 7.16 (22h) VOUT_TRIM
- 7.17 (24h) VOUT_MAX
- 7.18 (25h) VOUT_MARGIN_HIGH
- 7.19 (26h) VOUT_MARGIN_LOW
- 7.20 (27h) VOUT_TRANSITION_RATE
- 7.21 (29h) VOUT_SCALE_LOOP
- 7.22 (2Ah) VOUT_SCALE_MONITOR
- 7.23 (2Bh) VOUT_MIN
- 7.24 (33h) FREQUENCY_SWITCH
- 7.25 (35h) VIN_ON
- 7.26 (36h) VIN_OFF
- 7.27 (39h) IOUT_CAL_OFFSET
- 7.28 (40h) VOUT_OV_FAULT_LIMIT
- 7.29 (41h) VOUT_OV_FAULT_RESPONSE
- 7.30 (42h) VOUT_OV_WARN_LIMIT
- 7.31 (43h) VOUT_UV_WARN_LIMIT
- 7.32 (44h) VOUT_UV_FAULT_LIMIT
- 7.33 (45h) VOUT_UV_FAULT_RESPONSE
- 7.34 (46h) IOUT_OC_FAULT_LIMIT
- 7.35 (48h) IOUT_OC_LV_FAULT_LIMIT
- 7.36 (49h) IOUT_OC_LV_FAULT_RESPONSE
- 7.37 (4Ah) IOUT_OC_WARN_LIMIT
- 7.38 (4Fh) OT_FAULT_LIMIT
- 7.39 (50h) OT_FAULT_RESPONSE
- 7.40 (51h) OT_WARN_LIMIT
- 7.41 (55h) VIN_OV_FAULT_LIMIT
- 7.42 (60h) TON_DELAY
- 7.43 (61h) TON_RISE
- 7.44 (64h) TOFF_DELAY
- 7.45 (65h) TOFF_FALL
- 7.46 (78h) STATUS_BYTE
- 7.47 (79h) STATUS_WORD
- 7.48 (7Ah) STATUS_VOUT
- 7.49 (7Bh) STATUS_IOUT
- 7.50 (7Ch) STATUS_INPUT
- 7.51 (7Dh) STATUS_TEMPERATURE
- 7.52 (7Eh) STATUS_CML
- 7.53 (7Fh) STATUS_OTHER
- 7.54 (80h) STATUS_MFR_SPECIFIC
- 7.55 (88h) READ_VIN
- 7.56 (8Bh) READ_VOUT
- 7.57 (8Ch) READ_IOUT
- 7.58 (8Dh) READ_TEMPERATURE_1
- 7.59 (98h) PMBUS_REVISION
- 7.60 (99h) MFR_ID
- 7.61 (9Ah) MFR_MODEL
- 7.62 (9Bh) MFR_REVISION
- 7.63 (ADh) IC_DEVICE_ID
- 7.64 (AEh) IC_DEVICE_REV
- 7.65 (D1h) SYS_CFG_USER1
- 7.66 (D2h) PMBUS_ADDR
- 7.67 (D4h) COMP
- 7.68 (D5h) VBOOT_OFFSET_1
- 7.69 (D6h) STACK_CONFIG
- 7.70 (D8h) PIN_DETECT_OVERRIDE
- 7.71 (D9h) NVM_CHECKSUM
- 7.72 (DAh) READ_TELEMETRY
- 7.73 (79h) STATUS_ALL
- 7.74 (DDh) EXT_WRITE_PROTECTION
- 7.75 (A4h) IMON_CAL
- 7.76 (FCh) FUSION_ID0
- 7.77 (FDh) FUSION_ID1
- 8 Application and Implementation
- 9 Device and Documentation Support
- 10Revision History
- 11Mechanical, Packaging, and Orderable Information
6.4.3 Powering the Device From a 12V Bus
The device works well when powering from a 12V bus with a single VIN configuration. As a single VIN configuration, the internal LDO is powered by the 12V bus and generates 4.5V output to bias the internal analog circuitry and also powers up the gate drives. The VIN input range under this configuration is 4V to 18V. Figure 6-5 shows an example for this single VIN configuration.
VIN and CNTL are the two signals to enable the part. For start-up sequence, any sequence between the VIN and CNTL signals can power the device up correctly.
Figure 6-5 Single VIN
Configuration With 12V Bus