SLUSFM1 December   2024 TPS4812-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Charge Pump and Gate Driver Output (VS, GATE, BST, SRC)
      2. 8.3.2 Capacitive Load Driving
        1. 8.3.2.1 Using Low-Power Bypass FET (G Drive) for Load Capacitor Charging
        2. 8.3.2.2 Using Main FET (GATE Drive) Gate Slew Rate Control
      3. 8.3.3 Overcurrent and Short-Circuit Protection
        1. 8.3.3.1 I2t-Based Overcurrent Protection
          1. 8.3.3.1.1 I2t-Based Overcurrent Protection With Auto-Retry
          2. 8.3.3.1.2 I2t-Based Overcurrent Protection With Latch-Off
        2. 8.3.3.2 Short-Circuit Protection
      4. 8.3.4 Analog Current Monitor Output (IMON)
      5. 8.3.5 NTC-Based Temperature Sensing (TMP) and Analog Monitor Output (ITMPO)
      6. 8.3.6 Fault Indication and Diagnosis (FLT)
      7. 8.3.7 Reverse Polarity Protection
      8. 8.3.8 Undervoltage Protection (UVLO)
    4. 8.4 Device Functional Modes
      1. 8.4.1 State Diagram
      2. 8.4.2 State Transition Timing Diagram
      3. 8.4.3 Power Down
      4. 8.4.4 Shutdown Mode
      5. 8.4.5 Low Power Mode (LPM)
      6. 8.4.6 Active Mode (AM)
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application 1: Driving Power at all times (PAAT) Loads With Automatic Load Wakeup
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 Typical Application 2: Driving Power at all times (PAAT) Loads With Automatic Load Wakeup and Output Bulk Capacitor Charging
      1. 9.3.1 Design Requirements
      2. 9.3.2 External Component Selection
      3. 9.3.3 Application Curves
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

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発注情報

6.5 Electrical Characteristics

TJ = –40 ℃ to +125℃. V(VS) = 48 V, V(BST – SRC) = 12 V, V(SRC) = 0 V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VS)
VS Operating input voltage 3.5 95 V
V(S_PORR) Input supply  POR threshold, rising 2.06 2.6 3.12 V
V(S_PORF) Input supply POR threshold, falling 2 2.5 3.01 V
Total System Quiescent current, I(GND) V(EN/UVLO) = V(LPM) = 2 V 430 525 µA
Total System Quiescent current, I(GND) V(EN/UVLO) = V(LPM) = 2 V
TPS48121-Q1 Only		 370 470 µA
Total System Quiescent current, I(GND) V(EN/UVLO) = 2V, V(LPM) = 0 V 20 24 µA
I(SHDN) SHDN current, I(GND) V(SRC) = 48 V, V(EN/UVLO) = 0 V, V(SRC) = 0 V 0.9 3.4 µA
I(REV_VS) I(VS) leakage current during Reverse Polarity 0 V ≤ V(VS) ≤ – 65 V 60 µA
I(REV_SRC) I(SRC) leakage current during Reverse Polarity 0 V ≤ V(VS) ≤ – 65 V 27 µA
ENABLE, UNDERVOLTAGE LOCKOUT (EN/UVLO) AND OVER VOLTAGE PROTECTION INPUT (OV)
V(UVLOR) UVLO threshold voltage, rising 1.16 1.2 1.245 V
V(UVLOF) UVLO threshold voltage, falling 1.09 1.11 1.16 V
V(ENR) Enable threshold voltage for low Iq shutdown, rising 1 V
V(ENF) Enable threshold voltage for low Iq shutdown, falling 0.3 V
I(EN/UVLO) Enable input leakage current V(EN/UVLO)  = 48 V 500 nA
CHARGE PUMP (BST–SRC)
I(BST_LPM) Charge Pump Supply current in LPM V(BST – SRC)  = 10 V, V(EN/UVLO) =  2 V, V(LPM) = 0 V 175 360 575 µA
I(BST_AM) Charge Pump Supply current in active mode V(BST – SRC)  = 12 V, V(EN/UVLO) =  2 V, V(LPM) = 2 V 300 540 775 µA
V(BST UVLO) V(BST – SRC) UVLO voltage threshold, rising V(EN/UVLO) = 2 V 7 7.6 8.4 V
V(BST – SRC) UVLO voltage threshold, falling V(EN/UVLO) =  2 V 6 6.6 7.2 V
VCP(AM_LOW) Charge Pump Turn ON voltage in active mode V(EN/UVLO) = 2 V, V(LPM) = 2 V 9.5 10.4 12.3 V
VCP(AM_HIGH) Charge Pump Turnoff voltage in active mode V(EN/UVLO) = 2 V, V(LPM) = 2 V 10.42 11.3 13 V
VCP(LPM_LOW) Charge Pump Turn ON voltage in low power mode V(EN/UVLO) = 2 V, V(LPM) = 0 V 8.3 9.3 10.6 V
VCP(LPM_HIGH) Charge Pump Turnoff voltage in low power mode V(EN/UVLO) = 2 V, V(LPM) = 0 V 9.02 10.3 11.8 V
VCP(VS_3V) Charge Pump Voltage at V(VS) = 3 V V(EN/UVLO) = 2 V 8 V
V(G_GOOD) G Drive Good rising threshold w.r.t BST when bypass comparator reference changes from 2 V to 200 mV 2.3 V
I(SRC) SRC pin leakage current V(EN/UVLO) =  2 V, V(INP) = 0, V(LPM) = 2 V 1 1.57 µA
GATE DRIVER OUTPUTS (GATE, G)
I(GATE) Peak Source Current 0.5 A
I(GATE) Peak Sink Current 2 A
I(G) Gate charge (sourcing) current, on state 100 µA
I(G) G Peak Sink Current 390 mA
CURRENT SENSE AND CURRENT MONITOR (CS1+, CS1–, IMON, I_DIR)
V(OS_SET) Input referred offset (VSNS to V(IMON) scaling) -140 140 µV
V(GE_SET) Gain error (VSNS to V(IMON) scaling) –1 1 %
V(IMON_Acc) IMON accuracy VSNS = ±6 mV –5 5 %
V(IMON_Acc) IMON accuracy VSNS = ±10 mV –5 5 %
V(IMON_Acc) IMON accuracy VSNS = ±15 mV –2 2 %
V(IMON_Acc) IMON accuracy VSNS = ±30 mV –2 2 %
OVERCURRENT (I2t) AND SHORT CIRCUIT PROTECTION (IOC, I2t, ISCP, DRN)
V(OCP) OCP threshold accuracy 15 mV ≥ V(OCP) ≥ 100 mV –7.5 7.5 %
I2(I2t_Acc) I2 current accuracy on I2t pin 15 mV ≥ V(OCP) ≥ 100 mV
VSNS = V(OCP) + 50% of V(OCP)		 -15 15 %
I2(I2t_Acc) I2 current accuracy on I2t pin 15 mV ≥ V(OCP) ≥ 100 mV
VSNS = V(OCP) + 100% of V(OCP)		 -10 10 %
I2(I2t_Acc) I2 current accuracy on I2t pin 15 mV ≥ V(OCP) ≥ 100 mV
VSNS = V(OCP) + 200% of V(OCP)		 -10 10 %
V(I2t_OC) I2t pin voltage threshold for overcurrent shutdown 1.93 2 2.09 V
I(I2t_Charge) Charging current on I2t pin to V(I2t_OFFSET) 5100 µA
R(I2t_Discharge) Internal switch discharge resistance 1200 Ω
V(I2t_OFFSET) I2t pin offset voltage 490 500 415 mV
V(REF_OC) IOC pin reference voltage 190 200 205 mV
V(SCP) SCP threshold accuracy V(SNS_SCP) = 20 mV, 
R(ISCP) = 732 Ω		 19 20 21 mV
V(SCP) SCP threshold accuracy V(SNS_SCP) = 100 mV, 
R(ISCP) = 3.92 kΩ		 95 100 105 mV
ISCP SCP Input Bias current 24.4 25 25.2 µA
LOAD WAKEUP COMPARATOR (CS2-, DRN)
V(LPM_SCP) Short-circuit threshold in LPM 1.72 2 2.17 V
V(LWU) Load wakeup current threshold 177 200 218 mV
AUTO-RETRY OR LATCH-OFF TIMER (TMR)
I(TMR_SRC_FLT) TMR source current  2 2.5 3 µA
I(TMR_SNK) TMR sink current 2 2.5 3 µA
V(TMR_HIGH) Voltage at TMR pin for AR counter rising threshold 1.04 1.23 1.42 V
V(TMR_LOW) Voltage at TMR pin for AR counter falling threshold 0.15 0.25 0.39 V
N(A-R Count) 32
TEMPERATURE MONITOR (CS1–, TMP, ITMPO)
V(REF_TMP) Temperature amplifier internal reference voltage 475 500 525 mV
V(ITMPO) Temperature monitor output voltage at 150℃
R(NTC) = 10 kΩ at 25℃		 R(TMP) = 330 Ω, 
R(NTC) = 309 Ω at 150℃, 
R(ITMPO) = 2.55 kΩ		 -6 6.64 %
V(ITMPO) Temperature monitor output voltage at 150℃
R(NTC) = 47 kΩ at 25℃		 R(TMP) = 1 kΩ, 
R(NTC) = 520 Ω at 150℃, 
R(ITMPO) = 6.19 kΩ		 -6 6.67 %
I(TMP) TMP leakage current 100 nA
V(TMP_OT) Over temperature threshold 1.9 2 2.06 V
INPUT CONTROLS (INP, INP_G, LPM), & FAULT FLAG (FLT)
R(FLT), R(WAKE), R(I_DIR) FLT, WAKE, I_DIR Pull-down resistance 70 Ω
I(FLT), I(WAKE), I(I_DIR) FLT, WAKE, I_DIR leakage current 0 V ≤ V(FLT) ≤ 20 V, 
0 V ≤ V(WAKE) ≤ 20 V,
0 V ≤ V(I_DIR) ≤ 20 V		 400 nA
V(INP_H), V(LPM_H) 2 V
V(INP_L), V(LPM_L) 0.72 V
V(INP_Hys), V(LPM_Hys) INP, LPM Hysteresis 400 mV
I(INP), I(LPM)  INP, LPM leakage current 200 nA