SLVSHL9 November   2024 TPS922051

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Adaptive Off-Time Current Mode Control
      2. 7.3.2 Setting LED Current
      3. 7.3.3 Internal Soft Start
      4. 7.3.4 Dimming Mode
        1. 7.3.4.1 PWM Dimming
        2. 7.3.4.2 Analog Dimming
      5. 7.3.5 Fault Protection
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 TPS922051D2 24V Input, 2A Output, 4-piece WLED Driver With Analog Dimming
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Inductor Selection
          2. 8.2.1.2.2 Input Capacitor Selection
          3. 8.2.1.2.3 Output Capacitor Selection
          4. 8.2.1.2.4 Sense Resistor Selection
          5. 8.2.1.2.5 Other External Components Selection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 TPS922050D1 48V Input, 1A Output, 12-piece WLED Driver with PWM Dimming
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Inductor Selection
          2. 8.2.2.2.2 Input Capacitor Selection
          3. 8.2.2.2.3 Output Capacitor Selection
          4. 8.2.2.2.4 Sense Resistor Selection
          5. 8.2.2.2.5 Other External Components Selection
        3. 8.2.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Package Option Addendum
    2. 11.2 Tape and Reel Information

6.5 Electrical Characteristics

The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of the product containingit. TJ = –40°C to +125°C, VIN = 7V, (unlessotherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY
VVIN_UVLO VIN undervoltage lockout Rising VIN 3.0 3.2 3.4 V
Falling VIN 2.8 3.0 3.2 V
Hysteresis 0.2 V
IOFF PWM off quiesent current from VIN VDIM = 0V, device enabled 1.0 1.3 mA
IOP Normal operating current 400kHz switching frequency 2.3 mA
IOP Normal operating current 1MHz switching frequency 3.5 mA
VVCC Internal LDO output voltage IVCC = 5mA 5.0 5.15 5.3 V
IVCC_LIM Internal LDO output current limit 15 20 26 mA
DIMMING
VPWM_L DIM low-level input voltage (D1 version) 0.4 V
VPWM_H DIM high-level input voltage (D1 version) 1.2 V
tPWM_OUT_ON PWM output minimum on time (D1 version) 100 ns
tPWM_IN_ON PWM input minimum on time (D1 verison) 100 ns
VADIM DIM input voltage range (D2 version) 0 2.2 V
FEEDBACK AND ERROR AMPLIFIER
gM(ea) Transconductance gain VDIM = 2V, VCSP-CSN = 200mV 205 265 325 μA/V
ICOMP Source/sink current VDIM = 2V, VCSP-CSN = 200mV ± 200mV ±24 ±40 ±56 µA
VREF CSP-CSN pin voltage VDIM = 2V 193 200 207 mV
VREF CSP-CSN pin voltage VDIM = 0.2V 18.5 20 21.5 mV
ILEAK_CSP/N CSP+CSN pin leakage current VIN = 60V, VDIM = 2V 48 µA
ILEAK_CSP/N CSP+CSN pin leakage current VIN = 60V, VDIM = 0V 15 µA
POWER STAGE
RDSON Switching FET on resistance VIN ≥ 5V 300 mΩ
tmin_ON Switching FET minimum on time 140 160 ns
tmin_OFF Switching FET minimum off time 140 160 ns
fSW Switching FET frequency (TPS922051, TPS922050DRLR) 0.4 MHz
fSW Switching FET frequency (TPS922050DSGR, TPS922050DGNR) 1.0 MHz
CURRENT LIMIT
ILIM Switching FET cycle-by-cycle current limit (TPS922050) 1.4 1.6 1.8 A
ILIM Switching FET cycle-by-cycle current limit (TPS922051) 2.8 3.2 3.6 A
THERMAL PROTECTION
TTSD Thermal shutdown temperature 165 °C
Hysteresis 15 °C