SLVSC25B July   2013  – June 2017 TPS61197

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Supply Voltage
      2. 7.3.2 Boost Controller
      3. 7.3.3 Switching Frequency
      4. 7.3.4 Enable and Undervoltage Lockout
      5. 7.3.5 Power-Up Sequencing and Soft Start-up
      6. 7.3.6 Current Regulation
      7. 7.3.7 PWM Dimming
      8. 7.3.8 Indication for Fault Conditions
    4. 7.4 Device Functional Modes
      1. 7.4.1 Protections
        1. 7.4.1.1 Switch Current Limit Protection Using the ISNS Pin
        2. 7.4.1.2 LED Open Protection
        3. 7.4.1.3 Schottky Diode Open Protection
        4. 7.4.1.4 Schottky Diode Short Protection
        5. 7.4.1.5 IFB Overvoltage Protection
        6. 7.4.1.6 Output Overvoltage Protection Using the OVP Pin
        7. 7.4.1.7 IFB Short-to-Ground Protection
        8. 7.4.1.8 Thermal Shutdown
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Simple Boost Converter
        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 Output Capacitor
          3. 8.2.1.2.3 Schottky Diode
          4. 8.2.1.2.4 Switch MOSFET and Gate Driver Resistor
          5. 8.2.1.2.5 Current Sense and Current Sense Filtering
          6. 8.2.1.2.6 Loop Consideration
        3. 8.2.1.3 Application Curves
      2. 8.2.2 PWM Dimming Controlled by Boost Converter
      3. 8.2.3 High Boost Ratio Application
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Voltage range(2) Pin VIN –0.3 33 V
Pin FAULT –0.3 VIN
Pin ISNS, IFB –0.3 3.3
Pin EN, PWM, VDD, GDRV, IDRV –0.3 20
Pin GDRV 10-ns transient –2 20
All other pins –0.3 7
Continuous power dissipation See Thermal Information
Operating junction temperature range –40 150 °C
Storage temperature, Tstg –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1000
Machine model 200
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VIN Input voltage range 8 30 V
VOUT Output voltage range VIN 300 V
L1 Inductor 4.7 470 µH
CIN Input capacitor 10 µF
COUT Output capacitor 1 220 µF
fSW Boost regulator switching frequency 50 800 kHz
fDIM PWM dimming frequency 0.09 22 kHz
TA Operating ambient temperature –40 85 °C
TJ Operating junction temperature –40 125 °C
(1) Customers need to verify the component value in their application if the values are different from the recommended values.

6.4 Thermal Information

THERMAL METRIC(1) TPS61197 UNITS
D (SOIC)
16 PINS
RθJA Junction-to-ambient thermal resistance 85.8 °C/W
RθJCtop Junction-to-case (top) thermal resistance 44.5 °C/W
RθJB Junction-to-board thermal resistance 43.3 °C/W
RψJT Junction-to-top characterization parameter 13.5 °C/W
RψJB Junction-to-board characterization parameter 42.9 °C/W
(1) For more information about traditional and new thermal metrics, see Semiconductor and IC Package Thermal Metrics.

6.5 Electrical Characteristics

VIN = 24 V, TA = –40°C to 85°C, typical values are at TA = 25°C, EC1 = 470 μF, EC2 = 22 μF (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLY
VIN Input voltage range 8 30 V
VVIN_UVLO Undervoltage lockout threshold VIN falling 6.5 7 V
VVIN_HYS VIN UVLO hysteresis 300 mV
IQ_VIN Operating quiescent current into VIN Device enabled, no switching, VIN = 30 V 2 mA
ISD Shutdown current VIN = 12 V
VIN = 30 V		 25
50		 µA
VDD Regulation voltage for internal circuit 0 mA < IDD < 15 mA 6.6 7 7.4 V
EN and PWM
VH Logic high input on EN, PWM VIN = 8 V to 30 V 1.6 V
VL Logic low input on EN, PWM VIN = 8 V to 30 V 0.75 V
RPD Pulldown resistance on EN, PWM 400 800 1600 kΩ
UVLO
VUVLOTH Threshold voltage at UVLO pin 1.204 1.229 1.253 V
IUVLO UVLO input bias current VUVLO = VUVLOTH – 50 mV –0.1 0.1 µA
VUVLO = VUVLOTH + 50 mV –4.4 -3.9 –3.3
SOFT START
ISS Soft start charging current PWM dimming on, VREF< 2 V 200 µA
CURRENT REGULATION
VIFB_REG IFB pin regulation voltage TJ = 25°C to 85°C 293 300 307 mV
VIFB_SCP IFB short to ground protection threshold 200 mV
VIFB_OVP IFB over voltage protection threshold 1 1.1 1.2 V
IIFB_LEAK IFB pin leakage current VIFB = 300 mV –100 100 nA
BOOST REFERENCE VOLTAGE
VREF Reference voltage range for boost controller 0 3.5 V
IREF_LEAK Leakage current at REF TJ = –40°C to 85°C –25 25 nA
OSCILLATOR
VFSW FSW pin reference voltage 1.8 V
ERROR AMPLIFIER
ISINK Comp pin sink current VOVP = VREF + 200 mV, VCOMP = 1V 20 µA
ISOURCE Comp pin source current VOVP = VREF – 200 mV, VCOMP = 1V 20 µA
GmEA Error amplifier transconductance 90 120 150 µS
REA Error amplifier output resistance 20 MΩ
GATE DRIVER
RGDRV_SRC Gate driver impedance when sourcing VGDRV = 7 V, IGDRV = –20 mA 5 10 Ω
RGDRV_SNK Gate driver impedance when sinking VDD = 7 V, IGDRV = 20 mA 2 5 Ω
IGDRV_SRC Gate driver source current VDD = 7 V, VGDRV = 5 V 200 mA
IGDRV_SNK Gate driver sink current VDD = 7 V, VGDRV = 2 V 400 mA
VPWM_OCP Overcurrent detection threshold during PWM VIN = 8 V to 30 V, TJ = 25°C to 125°C 376 400 424 mV
VPFM_OCP Overcurrent detection threshold during PFM 180 mV
OVP
VOVPTH Overvoltage protection threshold 2.98 3.04 3.1 V
IOVP_LEAK Leakage current at OVP pin –100 0 100 nA
FAULT INDICATOR
IFLT_H Leakage current at high impedance VFLT = 24 V 1 nA
IFLT_L Sink current at low output VFLT = 1 V 2 5 mA
THERMAL SHUTDOWN
TSTDN Thermal shutdown threshold 150 °C
THYS Thermal shutdown threshold hysteresis 15 °C

6.6 Switching Characteristics

over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ƒSW Switching frequency R = 200 kΩ 187 200 213 kHz
D(max) Maximum duty cycle fSW = 200 kHz 90% 94% 98%
ton(min) Minimum pulse width 300 ns
ƒEA Error amplifier crossover frequency 1000 kHz

6.7 Typical Characteristics

Table 1. Table Of Graphs

See Figure 18
TITLE TEST CONDITIONS FIGURE
Dimming Linearity 24 LEDs (VOUT = 80 V), VIN = 24 V Figure 1
Dimming Linearity at Small Dimming Duty Cycle 24 LEDs (VOUT = 80 V), VIN = 24 V Figure 2
DC Load Efficiency fSW = 130 kHz Figure 3
Switching Frequency Setting VIN = 24 V Figure 4
Boost Switching Waveform VIN = 24 V, VOUT = 80 V, IOUT = 300 mA Figure 5
Dimming Waveform (2% Dimming) VIN = 24 V, VOUT = 80 V, IOUT = 300 mA, 100-Hz dimming frequency Figure 6
Startup Waveform (1% Dimming) 100-Hz dimming frequency, 1% dimming duty cycle Figure 7
Startup Waveform (100% Dimming) 100-Hz dimming frequency, 100% dimming duty cycle Figure 8
Shutdown Waveform (1% Dimming) 100-Hz dimming frequency, 1% dimming duty cycle Figure 9
Shutdown Waveform (100% Dimming) 100-Hz dimming frequenc, 100% dimming duty cycle Figure 10
LED Open Protection (1% Dimming) 100-Hz dimming frequenc, 1% dimming duty cycle Figure 11
LED Open Protection (100% Dimming) 100-Hz dimming frequenc, 100% Dimming Duty Cycle Figure 12
LED String Short Protection (1% Dimming) 100-Hz dimming frequency, 1% dimming duty cycle Figure 13
LED String Short Protection (100% Dimming) 100-Hz dimming frequency, 1% dimming duty cycle Figure 14
TPS61197 C003_SLVSC25.png
Figure 1. Dimming Linearity
TPS61197 C005_SLVSC25.png
Figure 3. DC Load Efficiency
TPS61197 C004_SLVSC25.png
Figure 2. Dimming Linearity at Low Dimming Duty Cycle
TPS61197 C006_SLVSC25.png
Figure 4. Switching Frequency Setting
TPS61197 S1_lvsc25.gif
Figure 5. Boost Switching Waveform
TPS61197 S3_lvsc25.gif
Figure 7. Start-up Waveform (1% Dimming)
TPS61197 S5_lvsc25.gif
Figure 9. Shutdown Waveform (1% Dimming)
TPS61197 S7_lvsc25.gif
Figure 11. LED Open Protection (1% Dimming)
TPS61197 S9_lvsc25.gif
Figure 13. LED String Short Protection (1% Dimming)
TPS61197 S2_lvsc25.gif
Figure 6. Dimming Waveform (1% Dimming)
TPS61197 S4_lvsc25.gif
Figure 8. Start-up Waveform (100% Dimming)
TPS61197 S6_lvsc25.gif
Figure 10. Shutdown Waveform (100% Dimming)
TPS61197 S8_lvsc25.gif
Figure 12. LED Open Protection (100% Dimming)
TPS61197 S10_lvsc25.gif
Figure 14. LED String Short Protection (100% Dimming)