JAJSNA0 December   2022 TPS25762-Q1

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Recommended Components
    5. 7.5  Thermal Information
    6. 7.6  Buck-Boost Regulator
    7. 7.7  CC Cable Detection Parameters
    8. 7.8  CC VCONN Parameters
    9. 7.9  CC PHY Parameters
    10. 7.10 Thermal Shutdown Characteristics
    11. 7.11 Oscillator Characteristics
    12. 7.12 ADC Characteristics
    13. 7.13 TVS Parameters
    14. 7.14 Input/Output (I/O) Characteristics
    15. 7.15 BC1.2 Characteristics
    16. 7.16 I2C Requirements and Characteristics
    17. 7.17 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Device Power Management and Supervisory Circuitry
        1. 9.3.1.1 VIN UVLO and Enable/UVLO
        2. 9.3.1.2 Internal LDO Regulators
      2. 9.3.2  TVSP Device Configuration and ESD Protection
      3. 9.3.3  Buck-Boost Regulator
        1. 9.3.3.1  Buck-Boost Regulator Operation
        2. 9.3.3.2  Switching Frequency, Frequency Dither, Phase-Shift and Synchronization
        3. 9.3.3.3  VIN Supply and VIN Over-Voltage Protection
        4. 9.3.3.4  Feedback Paths and Error Amplifiers
        5. 9.3.3.5  Transconductors and Compensation
        6. 9.3.3.6  Output Voltage DAC, Soft-Start and Cable Droop Compensation
        7. 9.3.3.7  VBUS Overvoltage Protection
        8. 9.3.3.8  VBUS Undervoltage Protection
        9. 9.3.3.9  Current Sense Resistor (RSNS) and Current Limit Operation
        10. 9.3.3.10 Buck-Boost Peak Current Limits
      4. 9.3.4  USB-PD Physical Layer
        1. 9.3.4.1 USB-PD Encoding and Signaling
        2. 9.3.4.2 USB-PD Bi-Phase Marked Coding
        3. 9.3.4.3 USB-PD Transmit (TX) and Receive (Rx) Masks
        4. 9.3.4.4 USB-PD BMC Transmitter
        5. 9.3.4.5 USB-PD BMC Receiver
        6. 9.3.4.6 Squelch Receiver
      5. 9.3.5  VCONN
      6. 9.3.6  Cable Plug and Orientation Detection
        1. 9.3.6.1 Configured as a Source
        2. 9.3.6.2 Configured as a Sink
        3. 9.3.6.3 Overvoltage Protection (Px_CC1, Px_CC2)
      7. 9.3.7  ADC
        1. 9.3.7.1 ADC Divider Ratios
      8. 9.3.8  BC 1.2, Legacy and Fast Charging Modes (Px_DP, Px_DM)
      9. 9.3.9  USB2.0 Low-Speed Endpoint
      10. 9.3.10 Digital Interfaces
        1. 9.3.10.1 General GPIO
        2. 9.3.10.2 I2C Buffer
      11. 9.3.11 I2C Interface
        1. 9.3.11.1 I2C Interface Description
        2. 9.3.11.2 I2C Clock Stretching
        3. 9.3.11.3 I2C Address Setting
        4. 9.3.11.4 Unique Address Interface
        5. 9.3.11.5 I2C Pullup Resistor Calculation
      12. 9.3.12 Digital Core
        1. 9.3.12.1 Device Memory
        2. 9.3.12.2 Core Microprocessor
      13. 9.3.13 NTC Input
      14. 9.3.14 Thermal Sensors and Thermal Shutdown
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Application GUI Selections
        2. 10.2.2.2 EEPROM Selection
        3. 10.2.2.3 EN/UVLO
        4. 10.2.2.4 Sense Resistor, RSNS, RCSP, RCSN and CFILT
        5. 10.2.2.5 Inductor Currents
        6. 10.2.2.6 Output Capacitor
        7. 10.2.2.7 Input Capacitor
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 ドキュメントの更新通知を受け取る方法
    3. 13.3 サポート・リソース
    4. 13.4 Trademarks
    5. 13.5 静電気放電に関する注意事項
    6. 13.6 用語集
  14. 14Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

10.2.2.5 Inductor Currents

Table 10-1 lists recommended inductor values based on desired switching frequency, fSW. The following equations were used to derive the values in the Buck Calculation and Boost Calculation results tables below.

Equation 11. GUID-DA88235C-94D7-44AD-9711-DA8B08ED0886-low.gif
Equation 12. GUID-D77A0B93-08B4-489F-B41D-9CA34F5D3DED-low.gif

where

  • VIN(MAX) = maximum input voltage
  • VIN(MIN) = minimum input voltage
  • VOUT = output voltage
  • DBUCK = minimum duty cycle for buck mode
  • DBOOST = maximum duty cycle for boost mode
  • η = estimated efficiency calculated at VIN, VOUT, and IOUT

Buck Mode

Equation 13. GUID-6C70803B-44AA-480A-8B56-159E873DCF61-low.gif
Equation 14. GUID-3BB5E824-2701-4CC9-A6D2-EFA5E842BE0F-low.gif

where

  • VIN(MAX) = maximum input voltage
  • VOUT(MIN) = minimum output voltage
  • IOUT = maximum DC output current
  • ΔIL-BUCK(MAX) = maximum ripple current through the inductor when in buck operation
  • ISW_BUCK(MAX) = maximum switch current when in buck operation
  • DBUCK = minimum duty cycle for buck operation
  • fSW = switching frequency of the converter
  • L = selected inductor value
Equation 15. GUID-BA8D02A1-731F-4EC7-A195-AB711DA25657-low.gif

where

  • IMAXOUT(BUCK) = maximum deliverable current through inductor by the converter
  • IPEAK(BUCK) = buck switch peak current limit from Electrical Characteristics table
  • ΔIL_BUCK(MAX) = Ripple current through the inductor calculated in Equation 14.

Boost Mode

Equation 16. GUID-B0CA619A-A413-4326-939E-D01CEF79E342-low.gif
Equation 17. GUID-82077E6D-6456-40C7-ADD2-B6F0ED3771CD-low.gif

where

  • VIN(MIN) = minimum input voltage
  • VOUT(MAX) = desired output voltage
  • IOUT = desired output current
  • ΔIL_BOOST(MAX) = maximum ripple current through the inductor in boost operation
  • ISW_BOOST(MAX) = maximum switch current in boost operation
  • DBOOST = maximum duty cycle for boost operation
  • fSW= switching frequency of the converter
  • L = selected inductor value
Equation 18. GUID-7AC60C6D-2932-4784-AB38-91EA12610460-low.gif

where

  • IMAXOUT(BOOST) = maximum deliverable current through inductor by the converter
  • DBOOST = maximum duty cycle for boost mode
  • IPEAK(BOOST) = boost switch peak current limit from from Electrical Characteristics table
  • ΔIL_MAX(BOOST) = Ripple current through the inductor calculated in Equation 17.

Buck Operation

Table 10-6 provides the tabulated ΔIL_BUCK(MAX) and ISW_BUCK(MAX) for the conditions below.

  • η = 0.95
  • VIN(MAX) = 18 V
  • VOUT(MIN) = 3.3 V
  • DBUCK(MIN) = 0.193

Table 10-6 Buck Calculation Results (L = 4.7 µH), IBUS = 3 A
fSW
(kHz)		 IOUT
(A)		 ΔIL_BUCK(MAX)
(A)		 ISW_BUCK(MAX)
(A)
300 3.00 2.87 4.44
400 3.00 2.15 4.08
450 3.00 1.91 3.96
300 3.00 2.01 4.01
400 3.00 1.51 3.76
450 3.00 1.34 3.67

Boost Operation

Table 10-7 provides the tabulated ΔIL_BOOST(MAX), ISW_BOOST(MAX), suggested GUI IPEAK(BOOST) (MIN) settings for the maximum output power conditions shown below.

If ISW_BOOST(MAX) > IPEAK(BOOST) (MIN) → VBUS dropout likely.

If ISW_BOOST(MAX) < IPEAK(BOOST) (MIN) → VBUS regulates normally.

  • η = 0.95
  • VIN(MIN) = 5.5 V to 9 V
  • VOUT(MAX) = 21 V
  • IOUT = 3 A

To be noted, the calculation here uses 21V 3 A instead of 20 V 3.25A because 21 V 3A has bigger inductor peak current.

Table 10-7 Boost Calculation Results (L = 4.7 µH), IBUS = 3 A
fSW
(kHz)		 VIN(MIN)
(V)		 DBOOST(MAX) ΔIL_BOOST(MAX)
(A)		 ISW_BOOST(MAX)
(A)		 GUI (1)
IPEAK(BOOST)
(A)
300 5.5 0.751 2.93 13.51 12.3
6 0.729 3.10 12.62 12.3
6.5 0.706 3.25 11.83 12.3
7 0.683 3.39 11.16 12.3
7.5 0.661 3.52 10.61 10.8
8 0.638 3.62 10.10 10.8
8.5 0.615 3.71 9.65 10.8
9 0.593 3.79 9.27 9.3
400 5.5 0.751 2.20 13.15 12.3
6 0.729 2.33 12.24 12.3
6.5 0.706 2.44 11.42 12.3
7 0.683 2.54 10.73 10.8
7.5 0.661 2.64 10.17 10.8
8 0.638 2.71 9.64 10.8
8.5 0.615 2.78 9.18 9.3
9 0.593 2.84 8.79 9.3
450 5.5 0.751 1.95 13.02 12.3
6 0.729 2.07 12.11 12.3
6.5 0.706 2.17 11.29 12.3
7 0.683 2.26 10.59 10.8
7.5 0.661 2.34 10.02 10.8
8 0.638 2.41 9.49 9.3
8.5 0.615 2.47 9.03 9.3
9 0.593 2.51 8.63 9.3
(1) MIN value of boost peak ILIM shown. See electrical characteristics table for MIN, TYP, MAX values.