ZHCS614G October 2011 – September 2022 TPS40422
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 说明（续）
- 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 PMBus Interface Protocol General Description
- 8.3.2 Voltage Reference
- 8.3.3 Output Voltage
- 8.3.4 Voltage Feed Forward
- 8.3.5 Current Sensing
- 8.3.6 Overcurrent Protection
- 8.3.7 Current Sharing
- 8.3.8 Linear Regulators
- 8.3.9 BP Switch-over
- 8.3.10 Switching Frequency Setting
- 8.3.11 Switching Node and BOOT Voltage
- 8.3.12 Reading the Output Current
- 8.3.13 Soft-Start Time
- 8.3.14 Turn-On/Turn-Off Delay and Sequencing
- 8.3.15 Pre-Biased Output Start-Up
- 8.3.16 Undervoltage Lockout
- 8.3.17 Overvoltage and Undervoltage Fault Protection
- 8.3.18 Power Good
- 8.3.19 Overtemperature Fault Protection
- 8.3.20 Thermal Shutdown
- 8.3.21 Programmable Fault Responses
- 8.3.22 User Data
- 8.3.23 Adjustable Anti-Cross Conduction Delay
- 8.3.24 Connection of Unused Pins
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Maps
- 8.6.1
Supported Commands
- 8.6.1.1 PAGE (00h)
- 8.6.1.2 OPERATION (01h)
- 8.6.1.3 ON_OFF_CONFIG (02h)
- 8.6.1.4 CLEAR_FAULTS (03h)
- 8.6.1.5 WRITE_PROTECT (10h)
- 8.6.1.6 STORE_USER_ALL (15h)
- 8.6.1.7 RESTORE_USER_ALL (16h)
- 8.6.1.8 CAPABILITY (19h)
- 8.6.1.9 VOUT_MODE (20h)
- 8.6.1.10 VIN_ON (35h)
- 8.6.1.11 VIN_OFF (36h)
- 8.6.1.12 IOUT_CAL_GAIN (38h)
- 8.6.1.13 IOUT_CAL_OFFSET (39h)
- 8.6.1.14 IOUT_OC_FAULT_LIMIT (46h)
- 8.6.1.15 IOUT_OC_FAULT_RESPONSE (47h)
- 8.6.1.16 IOUT_OC_WARN_LIMIT (4Ah)
- 8.6.1.17 OT_FAULT_LIMIT (4Fh)
- 8.6.1.18 OT_WARN_LIMIT (51h)
- 8.6.1.19 TON_RISE (61h)
- 8.6.1.20 STATUS_BYTE (78h)
- 8.6.1.21 STATUS_WORD (79h)
- 8.6.1.22 STATUS_VOUT (7Ah)
- 8.6.1.23 STATUS_IOUT (7Bh)
- 8.6.1.24 STATUS_TEMPERATURE (7Dh)
- 8.6.1.25 STATUS_CML (7Eh)
- 8.6.1.26 STATUS_MFR_SPECIFIC (80h)
- 8.6.1.27 READ_VOUT (8Bh)
- 8.6.1.28 READ_IOUT (8Ch)
- 8.6.1.29 READ_TEMPERATURE_2 (8Eh)
- 8.6.1.30 PMBUS_REVISION (98h)
- 8.6.1.31 MFR_SPECIFIC_00 (D0h)
- 8.6.1.32 VREF_TRIM (MFR_SPECIFIC_04) (D4h)
- 8.6.1.33 STEP_VREF_MARGIN_HIGH (MFR_SPECIFIC_05) (D5h)
- 8.6.1.34 STEP_VREF_MARGIN_LOW (MFR_SPECIFIC_06) (D6h)
- 8.6.1.35 PCT_VOUT_FAULT_PG_LIMIT (MFR_SPECIFIC_07) (D7h)
- 8.6.1.36 126
- 8.6.1.37 SEQUENCE_TON_TOFF_DELAY (MFR_SPECIFIC_08) (D8h)
- 8.6.1.38 128
- 8.6.1.39 OPTIONS (MFR_SPECIFIC_21) (E5h)
- 8.6.1.40 DEVICE_CODE (MFR_SPECIFIC_44) (FCh)
- 8.6.1
Supported Commands
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1
Dual-Output Converter
- 9.2.1.1 Design Requirements
- 9.2.1.2
Detailed Design Procedure
- 9.2.1.2.1 Custom Design with WEBENCH® Tools
- 9.2.1.2.2 Step 1: Inductor Selection
- 9.2.1.2.3 Step 2: Output Capacitor Selection
- 9.2.1.2.4 Step 3: Input Capacitance Selection
- 9.2.1.2.5 Step 4: MOSFET Selection
- 9.2.1.2.6 Step 5: Snubber Circuit Design
- 9.2.1.2.7 Step 6: Soft-Start Time
- 9.2.1.2.8
Step 7: Peripheral Component Design
- 9.2.1.2.8.1 RT (Pin 1) Switching Frequency Setting
- 9.2.1.2.8.2 FB1 (Pin 2) and FB2 (Pin 8) Output Voltage Setting
- 9.2.1.2.8.3 Compensation Network Using COMP1 (Pin 3) , COMP2 (Pin 7), FB1 (Pin 2) FB2 DIFFO1 (Pin 8) (Pin 39)
- 9.2.1.2.8.4 Remote Sensing Using VSNS1 (Pin 37), GSNS1 (Pin 38) , VSNS2 (Pin 15), and GSNS2 (Pin 14)
- 9.2.1.2.8.5 Temperate Sensing Using TSNS1 (Pin36) and TSNS2 (Pin 16)
- 9.2.1.2.8.6 Current Sensing Network Design Using CS1P (Pin 34), CS1N (Pin 35) , CS2P (Pin 18), and CS2N (Pin 17)
- 9.2.1.2.8.7 PMBus Address ADDR1 (Pin 9) , and ADDR0 (Pin 10)
- 9.2.1.2.8.8
Voltage Decoupling Capacitors
- 9.2.1.2.8.8.1 VDD (Pin 31)
- 9.2.1.2.8.8.2 BP3 (Pin 32)
- 9.2.1.2.8.8.3 BNEXT (Pin 24)
- 9.2.1.2.8.8.4 BP6 (Pin 25)
- 9.2.1.2.8.8.5 Power Good PGOOD1 (Pin 33), PGOOD2 (Pin 19)
- 9.2.1.2.8.8.6 Bootstrap Capacitors BOOT1 (Pin 30), and BOOT2 (Pin 20)
- 9.2.1.2.8.8.7 High-Side MOSFET (Gate) Resistor
- 9.2.1.2.8.8.8 Synchronization Setting SYNC (Pin 40)
- 9.2.1.2.8.8.9 BP6 (Pin 25)
- 9.2.1.2.8.8.10 DIFFO (Pin 39)
- 9.2.1.3 Application Curves
- 9.2.1
Dual-Output Converter
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
8.4.4 Two-Phase Mode Operation
The TPS4022 device can be configured to operate in single-output two-phase mode for high-current applications. With proper selection of the external MOSFETs, this device can support up to 50-A of load current in a two-phase configuration. Figure 8-6 shows the TPS4022 device configured for two-phase mode with the FB2 pin tied to the BP6 pin. In this mode, COMP1 must be connected to COMP2 to ensure current sharing between the two phases. For high-current applications, the remote sense amplifier compensates for the parasitic offset to provide an accurate output voltage. The DIFFO1 pin, the output of the remote sensing amplifier, is connected to the resistor divider of the feedback network.
Figure 8-6 Connections in a Two-Phase Mode ConfigurationTable 8-2 summaries the channel 2 related pin connection in two-phase mode. Figure 8-7 shows a typical a two-phase mode application using the TPS4022 device.
Figure 8-7 Using the TPS4022 in a Two-Phase Mode Application| PIN NAME | CONNECTION |
|---|---|
| CNTL2 | Floating or connect to ground |
| COMP2 | Connect to COMP1 |
| FB2 | Connect to BP6 |
| GSNS2 | Connect to ground |
| PG2 | Floating or connect to ground |
| VSNS2 | Connect to ground is recommended. Connect to output voltage is also allowed. |
When the device operates in two-phase mode, a current sharing loop as shown in Figure 8-8 is designed to maintain the current balance between phases. Both phases share the same comparator voltage (COMP1). The sensed current in each phase is compared first in a current share block, then compared to an error current and then fed into the COMP pin. The resulting error voltage is compared with the voltage ramp to generate the PWM pulse.
Figure 8-8 Two-Phase Mode Current Share Loop