ZHCSCO3A May 2014 – JULY 2014 TPS40428
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Asynchronous Pulse Injection (API)
- 7.3.2 Adaptive Voltage Scaling (AVS)
- 7.3.3 Switching Frequency and Synchronization
- 7.3.4 Voltage Reference
- 7.3.5 Output Voltage and Remote Sensing Amplifier
- 7.3.6 Current Sensing and Temperature Sensing Modes
- 7.3.7 Current Sensing
- 7.3.8 Temperature Sensing
- 7.3.9 Current Sharing
- 7.3.10 Linear Regulators
- 7.3.11 Power Sequence Between TPS40428 Device and Power Stage
- 7.3.12 PWM Signal
- 7.3.13 Startup and Shutdown
- 7.3.14 Pre-Biased Output Start-up
- 7.3.15 PGOOD Indication
- 7.3.16 Overcurrent Protection
- 7.3.17 Output Overvoltage/Undervoltage Protection
- 7.3.18 Overtemperature Fault Protection
- 7.3.19 Input Undervoltage Lockout (UVLO)
- 7.3.20 Fault Communication
- 7.3.21 Fault Protection Summary
- 7.4 Device Functional Modes
- 7.5 Programming
- 7.6
Register Maps
- 7.6.1 PMBus General Description
- 7.6.2
PMBus Functionality
- 7.6.2.1 PMBus Address
- 7.6.2.2 PMBus Connections
- 7.6.2.3 PMBus Data Format
- 7.6.2.4 PMBus Output Voltage Adjustment
- 7.6.2.5 Reading the Output Current
- 7.6.2.6 Soft-Start Time
- 7.6.2.7 Turn-On/Turn-Off Delay and Sequencing
- 7.6.2.8
Supported PMBus Commands
- 7.6.2.8.1 PAGE (00h)
- 7.6.2.8.2 OPERATION (01h)
- 7.6.2.8.3 ON_OFF_CONFIG (02h)
- 7.6.2.8.4 CLEAR_FAULTS (03h)
- 7.6.2.8.5 WRITE_PROTECT (10h)
- 7.6.2.8.6 STORE_USER_ALL (15h)
- 7.6.2.8.7 RESTORE_USER_ALL (16h)
- 7.6.2.8.8 CAPABILITY (19h)
- 7.6.2.8.9 VOUT_MODE (20h)
- 7.6.2.8.10 VIN_ON (35h)
- 7.6.2.8.11 VIN_OFF (36h)
- 7.6.2.8.12 IOUT_CAL_GAIN (38h)
- 7.6.2.8.13 IOUT_CAL_OFFSET (39h)
- 7.6.2.8.14 IOUT_OC_FAULT_LIMIT (46h)
- 7.6.2.8.15 IOUT_OC_FAULT_RESPONSE (47h)
- 7.6.2.8.16 IOUT_OC_WARN_LIMIT (4Ah)
- 7.6.2.8.17 OT_FAULT_LIMIT (4Fh)
- 7.6.2.8.18 OT_WARN_LIMIT (51h)
- 7.6.2.8.19 TON_RISE (61h)
- 7.6.2.8.20 STATUS_BYTE (78h)
- 7.6.2.8.21 STATUS_WORD (79h)
- 7.6.2.8.22 STATUS_VOUT (7Ah)
- 7.6.2.8.23 STATUS_IOUT (7Bh)
- 7.6.2.8.24 STATUS_TEMPERATURE (7Dh)
- 7.6.2.8.25 STATUS_CML (7Eh)
- 7.6.2.8.26 STATUS_MFR_SPECIFIC (80h)
- 7.6.2.8.27 READ_VOUT (8Bh)
- 7.6.2.8.28 READ_IOUT (8Ch)
- 7.6.2.8.29 READ_TEMPERATURE_2 (8Eh)
- 7.6.2.8.30 PMBus_REVISION (98h)
- 7.6.2.8.31 MFR_SPECIFIC_00 (D0h)
- 7.6.2.8.32 MFR_SPECIFIC_04 (VREF_TRIM) (D4h)
- 7.6.2.8.33 MFR_SPECIFIC_05 (STEP_VREF_MARGIN_HIGH) (D5h)
- 7.6.2.8.34 MFR_SPECIFIC_06 (STEP_VREF_MARGIN_LOW) (D6h)
- 7.6.2.8.35 MFR_SPECIFIC_07 (PCT_VOUT_FAULT_PG_LIMIT) (D7h)
- 7.6.2.8.36 MFR_SPECIFIC_08 (SEQUENCE_TON_TOFF_DELAY) (D8h)
- 7.6.2.8.37 (E0h) MFR_SPECIFIC_16 (COMM_EEPROM_SPARE)
- 7.6.2.8.38 MFR_SPECIFIC_21 (OPTIONS) (E5h)
- 7.6.2.8.39 MFR_SPECIFIC_22 (PWM_OSC_SELECT) (E6h)
- 7.6.2.8.40 MFR_SPECIFIC_23 (MASK SMBALERT) (E7h)
- 7.6.2.8.41 MFR_SPECIFIC_25 (AVS_CONFIG) (E9h)
- 7.6.2.8.42 MFR_SPECIFIC_26 (AVS_ADDRESS) (EAh)
- 7.6.2.8.43 MFR_SPECIFIC_27 (AVS_DAC_DEFAULT) (EBh)
- 7.6.2.8.44 MFR_SPECIFIC_28 (AVS_CLAMP_HI) (ECh)
- 7.6.2.8.45 MFR_SPECIFIC_29 (AVS_CLAMP_LO) (EDh)
- 7.6.2.8.46 MFR_SPECIFIC_30 (TEMP_OFFSET) (EEh)
- 7.6.2.8.47 MFR_SPECIFIC_32 (API_OPTIONS) (F0h)
- 7.6.2.8.48 MFR_SPECIFIC_44 (DEVICE_CODE) (FCh)
-
8 Applications and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Switching Frequency Selection
- 8.2.2.2 Inductor Selection
- 8.2.2.3 Output Capacitor Selection
- 8.2.2.4 Input Capacitor Selection
- 8.2.2.5 VDD, BP5, BP3 Bypass Capacitor
- 8.2.2.6 R-C Snubber
- 8.2.2.7 Current and Temperature Sensor
- 8.2.2.8 Power Sequence Between the TPS40428 Device and Power Stage
- 8.2.2.9 Output Voltage Setting and Frequency Compensation Selection
- 8.2.2.10 Key PMBus Parameter Selection
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械封裝和可訂購信息
11 器件和文檔支持
11.1 開發支持
11.1.1 德州儀器 (TI) Fusion Digital Power Designer
德州儀器 (TI) Digital Power Designer 能夠為 TPS40428 提供全面支持。 Fusion digital Power Designer 是一款圖形用戶界面 (GUI)，可使用德州儀器 (TI) USB-to-GPIO 適配器通過 PMBus 來配置和監視 TPS40428 器件。
單擊此鏈接下載德州儀器 (TI) Fusion Digital Power Designer 軟件包。
Figure 33. 使用 Fusion Digital Power Designer 進行器件配置
Figure 34. 使用 Fusion Digital Power Designer 進行器件監控
11.1.2 TPS40k 環路補償工具
在雙路輸出應用中，TPS40428 器件是一款電壓模式控制器；德州儀器 (TI) TPS40k 環路補償工具可為其提供支持。 這款電子表格工具可用于計算頻率補償組件。
對于多相應用，將電流信息應用于控制環路可實現相位間的電流均流，TPS40428 器件此時不再是一個純粹的電壓模式控制器。 電子表格工具中計算得到的補償組件值可用作起始點。
由于組件變化、PCB 寄生阻抗和布局影響，最好根據測量結果來優化補償組件值。
11.2 Trademarks
All other trademarks are the property of their respective owners.
11.3 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.