ZHCSG68F MARCH   2017  – JANUARY 2019 TPSM846C23

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化电路原理图
      2.      效率与输出电流间的关系
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Programmable Characteristics
    8. 6.8 Typical Characteristics (VIN = 12 V)
    9. 6.9 Typical Characteristics (VIN = 5 V)
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  PMBus
        1. 7.3.1.1 PMBus General Description
        2. 7.3.1.2 PMBus Address
        3. 7.3.1.3 PMBus Connections
        4. 7.3.1.4 Supported PMBus Commands
      2. 7.3.2  Minimum Capacitance Requirements
      3. 7.3.3  Setting the Compensation Network
      4. 7.3.4  Transient Response
      5. 7.3.5  Setting the Output Voltage via PMBus
      6. 7.3.6  Setting the Output Voltage Without PMBus
      7. 7.3.7  Differential Remote Sense
      8. 7.3.8  Voltage Reference
      9. 7.3.9  Switching Frequency and Synchronization
        1. 7.3.9.1 Setting the Switching Frequency
        2. 7.3.9.2 Synchronization
          1. 7.3.9.2.1 Stand-Alone Device
          2. 7.3.9.2.2 Paralleled Devices
      10. 7.3.10 Input Undervoltage Lockout (UVLO)
      11. 7.3.11 Turnon and Turnoff Delay and Sequencing
      12. 7.3.12 Soft-Start Time and TON_RISE Command
      13. 7.3.13 Soft-Stop Time and TOFF_FALL Command
      14. 7.3.14 Prebiased Output Start-Up
      15. 7.3.15 Power Good (PGOOD) Indicator
      16. 7.3.16 Linear Regulators BP3 and BP6
      17. 7.3.17 VREF_TRIM
      18. 7.3.18 MARGIN
      19. 7.3.19 Parallel Application
      20. 7.3.20 Parallel Operation
      21. 7.3.21 Telemetry
        1. 7.3.21.1 Output Current Telemetry
        2. 7.3.21.2 Output Voltage Telemetry
        3. 7.3.21.3 Junction Temperature Telemetry
      22. 7.3.22 Overtemperature Protection
      23. 7.3.23 Overcurrent Protection
      24. 7.3.24 Output Overvoltage and Undervoltage Protection
      25. 7.3.25 Fault Protection Responses
    4. 7.4 Device Functional Modes
      1. 7.4.1 Continuous Conduction Mode
      2. 7.4.2 Operation With CNTL Signal Control
      3. 7.4.3 Operation With OPERATION Control
      4. 7.4.4 Operation With CNTL and OPERATION Control
    5. 7.5 Register Maps
      1. 7.5.1  OPERATION (01h)
        1. 7.5.1.1 On Bit
        2. 7.5.1.2 Off Bit
        3. 7.5.1.3 Margin Bit
      2. 7.5.2  ON_OFF_CONFIG (02h)
        1. 7.5.2.1 pu Bit
        2. 7.5.2.2 cmd Bit
        3. 7.5.2.3 cpr Bit
        4. 7.5.2.4 pol Bit
        5. 7.5.2.5 cpa Bit
      3. 7.5.3  CLEAR_FAULTS (03h)
      4. 7.5.4  WRITE_PROTECT (10h)
        1. 7.5.4.1 bit5
        2. 7.5.4.2 bit6
        3. 7.5.4.3 bit7
      5. 7.5.5  STORE_DEFAULT_ALL (11h)
      6. 7.5.6  RESTORE_DEFAULT_ALL (12h)
      7. 7.5.7  STORE_USER_ALL (15h)
      8. 7.5.8  RESTORE_USER_ALL (16h)
      9. 7.5.9  CAPABILITY (19h)
      10. 7.5.10 SMBALERT_MASK (1Bh)
      11. 7.5.11 VOUT_MODE (20h)
        1. 7.5.11.1 Mode Bit
        2. 7.5.11.2 Exponent Bit
      12. 7.5.12 VOUT_COMMAND (21h)
        1. 7.5.12.1 Exponent
        2. 7.5.12.2 Mantissa
      13. 7.5.13 VOUT_MAX (24h)
        1. 7.5.13.1 Exponent
        2. 7.5.13.2 Mantissa
      14. 7.5.14 VOUT_TRANSITION_RATE (27h)
        1. 7.5.14.1 Exponent
        2. 7.5.14.2 Mantissa
      15. 7.5.15 VOUT_SCALE_LOOP (29h)
        1. 7.5.15.1 Exponent
        2. 7.5.15.2 Mantissa
      16. 7.5.16 VOUT_MIN (2Bh)
        1. 7.5.16.1 Exponent
        2. 7.5.16.2 Mantissa
      17. 7.5.17 VIN_ON (35h)
        1. 7.5.17.1 Exponent
        2. 7.5.17.2 Mantissa
      18. 7.5.18 VIN_OFF (36h)
        1. 7.5.18.1 Exponent
        2. 7.5.18.2 Mantissa
      19. 7.5.19 IOUT_CAL_OFFSET (39h)
        1. 7.5.19.1 Exponent
        2. 7.5.19.2 Mantissa
      20. 7.5.20 VOUT_OV_FAULT_RESPONSE (41h)
        1. 7.5.20.1 RSP[1] Bit
        2. 7.5.20.2 RS[2:0] Bits
        3. 7.5.20.3 TD[2:0] Bits
      21. 7.5.21 VOUT_UV_FAULT_RESPONSE (45h)
        1. 7.5.21.1 RSP[1] Bit
        2. 7.5.21.2 RS[2:0] Bits
        3. 7.5.21.3 TD[2:0] Bits
      22. 7.5.22 IOUT_OC_FAULT_LIMIT (46h)
        1. 7.5.22.1 Exponent
        2. 7.5.22.2 Mantissa
      23. 7.5.23 IOUT_OC_FAULT_RESPONSE (47h)
        1. 7.5.23.1 RSP[1:0] Bits
        2. 7.5.23.2 RS[2:0] Bits
        3. 7.5.23.3 TD[2:0] Bits
      24. 7.5.24 IOUT_OC_WARN_LIMIT (4Ah)
        1. 7.5.24.1 Exponent
        2. 7.5.24.2 Mantissa
      25. 7.5.25 OT_FAULT_LIMIT (4Fh)
        1. 7.5.25.1 Exponent
        2. 7.5.25.2 Mantissa
      26. 7.5.26 OT_FAULT_RESPONSE (50h)
        1. 7.5.26.1 RSP[1] Bit
        2. 7.5.26.2 RS[2:0] Bits
        3. 7.5.26.3 TD[2:0] Bits
      27. 7.5.27 OT_WARN_LIMIT (51h)
        1. 7.5.27.1 Exponent
        2. 7.5.27.2 Mantissa
      28. 7.5.28 TON_DELAY (60h)
        1. 7.5.28.1 Exponent
        2. 7.5.28.2 Mantissa
      29. 7.5.29 TON_RISE (61h)
        1. 7.5.29.1 Exponent
        2. 7.5.29.2 Mantissa
      30. 7.5.30 TON_MAX_FAULT_LIMIT (62h)
        1. 7.5.30.1 Exponent
        2. 7.5.30.2 Mantissa
      31. 7.5.31 TON_MAX_FAULT_RESPONSE (63h)
        1. 7.5.31.1 RSP[1] Bit
        2. 7.5.31.2 RS[2:0] Bits
        3. 7.5.31.3 TD[2:0] Bits
      32. 7.5.32 TOFF_DELAY (64h)
        1. 7.5.32.1 Exponent
        2. 7.5.32.2 Mantissa
      33. 7.5.33 TOFF_FALL (65h)
        1. 7.5.33.1 Exponent
        2. 7.5.33.2 Mantissa
      34. 7.5.34 STATUS_BYTE (78h)
      35. 7.5.35 STATUS_WORD (79h)
      36. 7.5.36 STATUS_VOUT (7Ah)
      37. 7.5.37 STATUS_IOUT (7Bh)
      38. 7.5.38 STATUS_INPUT (7Ch)
      39. 7.5.39 STATUS_TEMPERATURE (7Dh)
      40. 7.5.40 STATUS_CML (7Eh)
      41. 7.5.41 STATUS_MFR_SPECIFIC (80h)
      42. 7.5.42 READ_VOUT (8Bh)
        1. 7.5.42.1 Exponent
        2. 7.5.42.2 Mantissa
      43. 7.5.43 READ_IOUT (8Ch)
        1. 7.5.43.1 Exponent
        2. 7.5.43.2 Mantissa
      44. 7.5.44 READ_TEMPERATURE_1 (8Dh)
        1. 7.5.44.1 Exponent
        2. 7.5.44.2 Mantissa
      45. 7.5.45 PMBUS_REVISION (98h)
      46. 7.5.46 IC_DEVICE_ID (ADh)
      47. 7.5.47 IC_DEVICE_REV (AEh)
      48. 7.5.48 MFR_SPECIFIC_00 (D0h)
      49. 7.5.49 VREF_TRIM (MFR_SPECIFIC_04) (D4h)
      50. 7.5.50 STEP_VREF_MARGIN_HIGH (MFR_SPECIFIC_05) (D5h)
      51. 7.5.51 STEP_VREF_MARGIN_LOW (MFR_SPECIFIC_06) (D6h)
      52. 7.5.52 PCT_OV_UV_WRN_FLT_LIMITS (MFR_SPECIFIC_07) (D7h)
      53. 7.5.53 OPTIONS (MFR_SPECIFIC_21) (E5h)
        1. 7.5.53.1  DIS_NEGILIM Bit
        2. 7.5.53.2  EN_RESET_B Bit
        3. 7.5.53.3  EN_ADC_CNTL Bit
        4. 7.5.53.4  VSM Bit
        5. 7.5.53.5  DLO Bit
        6. 7.5.53.6  AVG_PROG[1:0] Bits
        7. 7.5.53.7  EN_AUTO_ARA Bit
        8. 7.5.53.8  READ_VOUT_RANGE[1:0] Bits
        9. 7.5.53.9  RST_VOUT_oSD Bit
        10. 7.5.53.10 RSMLO_VAL Bit
        11. 7.5.53.11 RSMHI_VAL Bit
      54. 7.5.54 MISC_CONFIG_OPTIONS (MFR_SPECIFIC_32) (F0h)
        1. 7.5.54.1 OV_RESP_SEL Bit
        2. 7.5.54.2 HSOC_USER_TRIM[1:0] Bits
        3. 7.5.54.3 EN_AVS_USER Bit
        4. 7.5.54.4 FORCE_SYNC_OUT Bit
        5. 7.5.54.5 FORCE_SYNC_IN Bit
        6. 7.5.54.6 SYNC_FAULT_DIS Bit
  8. 8 Application and Implementation
    1. 8.1 Typical Application
      1. 8.1.1 Design Requirements
      2. 8.1.2 Detailed Design Procedure
        1. 8.1.2.1 Custom Design With WEBENCH® Tools
        2. 8.1.2.2 Setting the Output Voltage
        3. 8.1.2.3 Input and Output Capacitance
        4. 8.1.2.4 Selecting the Compensation Components
        5. 8.1.2.5 Setting the Switching Frequency
        6. 8.1.2.6 Power Good (PGOOD)
        7. 8.1.2.7 ON/OFF Control (CNTL)
      3. 8.1.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Package Specifications
    4. 10.4 EMI
    5. 10.5 Mounting and Thermal Profile Recommendation
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 开发支持
        1. 11.1.1.1 使用 WEBENCH® 工具创建定制设计
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 接收文档更新通知
    4. 11.4 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 术语表
  12. 12机械、封装和可订购信息
    1. 12.1 Tape and Reel Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.3.25 Fault Protection Responses

Table 7 summarizes the various fault protections and associated responses.

NOTE

When configured as parallel operation, the best practice is to have the fault response of the loop master and slave device set as the same to avoid unexpected behavior.

Table 7. Fault Protection Summary

FAULT or WARN PROGRAMMING FAULT RESPONSE SETTING FET BEHAVIOR ACTIVE DURING TON_RISE SOURCE OF SMBALERT SMBALERT MASKABLE PGOOD
Internal Overtemperature Fault OT_FAULT_LIMIT (4Fh) Latch-off Both FETs off Yes Yes Yes Low
Restart Both FETs off, then restart after cooling down(1) Low
Ignore FETs still controlled by PWM High
Internal Overtemperature Warn OT_WARN_LIMIT (51h) Latch-off or restart on fault PWM maintains control of FETs Yes Yes Yes Low
Ignore fault High
Bandgap Overtemperature Fault Threshold fixed internally Latch-off Both FETs off Yes Yes Yes Low
Restart Both FETs off, then restart after cooling down(1)
Ignore Both FETs off, then restart after cooling down(2)
Low-Side OC Fault IOUT_OC_FAULT_LIMIT (46h) Latch-off 3 PWM counts, then both FETs off Yes Yes Yes Low
Restart 3 PWM counts, then both FETs off, restart after 7× TON_RISE Low
Ignore FETs still controlled by PWM High
Low-Side OC Warn IOUT_OC_WARN_LIMIT Latch-off or Restart on Fault PWM maintains control of FETs Yes Yes Yes Low
Ignore Fault High
High-Side OC Fault Latch-off 3 PWM counts, then both FETs off Yes Yes Yes Low
Restart 3 PWM counts, then both FETs off, restart after 7 × TON_RISE Low
Ignore Cycle-by-cycle peak current limit High
VOUT OV Fault PCT_OV_UV_WRN_FLT_LIMITS (MFR_SPECIFIC_07) (D7h) Latch-off High-side FET OFF, low-side FET response configured byOV_RESP_SEL Bit: latch ON or turn on till FB drops below 0.2 V Yes Yes Yes Low
Restart High-side FET OFF, low-side FET response configured byOV_RESP_SEL Bit: latch ON or turn on till FB drops below 0.2 V. Then restart after 7 × TON_RISE
Ignore PWM maintains control of FETs
VOUT OV Warn PCT_OV_UV_WRN_FLT_LIMITS (MFR_SPECIFIC_07) (D7h) Latch-off or restart on fault PWM maintains control of FETs Yes Yes Yes Low
Ignore Fault
VOUT UV Fault PCT_OV_UV_WRN_FLT_LIMITS (MFR_SPECIFIC_07) (D7h) Latch-off Both FETs off No Yes Yes Low
Restart Both FETs off, then restart after 7 × TON_RISE
Ignore PWM maintains control of FETs
VOUT UV Warn PCT_OV_UV_WRN_FLT_LIMITS (MFR_SPECIFIC_07) (D7h) Latch-off or restart on fault PWM maintains control of FETs No Yes Yes Low
Ignore fault
TON Max Fault TON_MAX_FAULT_LIMIT Latch-off Both FETs off No Yes Yes Low
Restart Both FETs off, then restart after 7 × TON_RISE
Ignore PWM maintains control of FETs
VIN UVLO VIN_ON, VIN_OFF Shutdown Both FETs off Yes Yes Yes Low
(1) When the overtemperature fault is tripped, the device shuts off both FETs and restarts until the sensed temperature decreases 20°C from the tripping threshold.
(2) The bandgap-overtemperature fault cannot be ignored, the device shuts off both FETs and restarts after the internal die temperature drops below the threshold.
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