SLVSBG1D October   2012  – May 2015 TPS61196

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 Unused LED String
      7. 7.3.7 Current Regulation
      8. 7.3.8 PWM Dimming
    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  LED Short-Cross Protection Using the FBP Pin
        4. 7.4.1.4  Schottky Diode Open Protection
        5. 7.4.1.5  Schottky Diode Short Protection
        6. 7.4.1.6  IFB Overvoltage Protection During Start-up
        7. 7.4.1.7  Output Overvoltage Protection Using the OVP Pin
        8. 7.4.1.8  Output Short-to-Ground Protection
        9. 7.4.1.9  IFB Short-to-Ground Protection
        10. 7.4.1.10 ISET Short-to-Ground Protection
        11. 7.4.1.11 Thermal Protection
      2. 7.4.2 Indication For Fault Conditions
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Inductor Selection
        2. 8.2.2.2 Schottky Diode
        3. 8.2.2.3 Switch MOSFET and Gate Driver Resistor
        4. 8.2.2.4 Current Sense and Current Sense Filtering
        5. 8.2.2.5 Output Capacitor
        6. 8.2.2.6 Loop Consideration
      3. 8.2.3 Application Curves
  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 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 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(2) VIN pin –0.3 33 V
FAULT pin –0.3 VIN
FB1 to IFB6 pins –0.3 40
FBP, ISET, ISNS, IFBV pins –0.3 3.3
EN, PWM1 to PWM6 pins –0.3 20
GDRV pins –0.3 7
GDRV 10-ns transient pins –2 9
All other pins –0.3 7
Continuous power dissipation See Thermal Information
Operating junction temperature –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 (max)
(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 NOM MAX UNIT
VIN Input voltage 8 30 V
VOUT Output voltage VIN 120 V
L1 Inductor 10 100 µH
CIN Input capacitor 10 µF
COUT Output capacitor 22 220 µF
fSW Boost regulator switching frequency 100 800 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) TPS61196 UNIT
PWP
28 PINS
RθJA Junction-to-ambient thermal resistance 33.8 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 18.8
RθJB Junction-to-board thermal resistance 15.6
ψJT Junction-to-top characterization parameter 0.6
ψJB Junction-to-board characterization parameter 15.4
RθJC(bot) Junction-to-case (bottom) thermal resistance 2.5
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

6.5 Electrical Characteristics

VIN= 24 V, minimum and maximum limits are at TA = –40°C to +85°C, typical values are at TA = 25°C, C1 = 10 μF, C2 = 2.2 μF, C3 = 1 μF, EC1 = EC2 = 100 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 5.7 6 6.3 V
EN and PWMx
VH Logic high input on EN,PWMx VIN = 8 V to 30 V 1.8 V
VL Logic low input on EN, PWMx VIN = 8 V to 30 V 0.8 V
RPD Pull-down resistance on EN, PWMx 0.8 1.6 3 MΩ
UVLO
VUVLOTH Threshold voltage at UVLO pin 1.204 1.229 1.253 V
IUVLO UVLO input bias current VUVLO = VUVLOTH – 50 mV
VUVLO = VUVLOTH + 50 mV		 –0.1
–4.3
-3.9		 0.1
–3.3		 µA
SOFT START
ISS Soft start charging current PWM ON, VREF< 2 V
PWM ON, VREF> 2 V		 200
10		 µA
CURRENT REGULATION
VISET ISET pin voltage 1.217 1.229 1.240 V
IISET_P ISET short-to-ground protection threshold 120 150 180 µA
KISET Current multiple IIFB/IISET IISET = 32.56 µA, VIFB = 0.5 V 3932 3992 4052
IIFB(AVG) Current accuracy IISET = 32.56 µA, VIFB = 0.5 V 127.4 130 132.6 mA
KIFB(M) Current matching; (IFB(MAX)-IFB(MIN))/2IFB(AVG) IISET = 32.56 µA, VIFB = 0.5 V 0.5% 1.5%
IIFB_LEAK IFB pin leakage current at dimming off IFB voltage < 40 V 1 µA
IIFB_max Current sink max output current VIFBV = 350 mV 130 mA
IFB REGULATION VOLTAGE
VIFB Regulation voltage at IFB Measured on VIFB(min), other IFB voltages are 0.5 V above VIFB(min).
IIFB = 130 mA, VIFBV = 0.5 V		 508 mV
IIFBV IFB Regulation voltage setting sourcing current at IFBV VIFBV = 0.5 V 0.247 0.25 0.253 IISET
VIFBV IFBV voltage setting range 0.3 1 V
BOOST REFERENCE VOLTAGE
VREF Reference voltage range for boost controller 0 3.1 V
IREF_LEAK Leakage current at REF pin –25 25 nA
OSCILLATOR
VFSW FSW pin reference voltage 1.8 V
VFSW_H Logic high input voltage 3.5 V
VFSW_L Logic low input voltage 0.5 V
ERROR AMPLIFIER
ISINK Comp pin sink current VOVP = VREF + 200 mV, VCOMP = 1 V 20 µA
ISOURCE Comp pin source current VOVP = VREF – 200 mV, VCOMP = 1 V 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 VDD = 6 V, IGDRV = –20 mA 2 3 Ω
RGDRV(SNK) Gate driver impedance when sinking VDD = 6 V, IGDRV = 20 mA 1 1.5 Ω
IGDRV(SRC) Gate driver source current VGDRV = 5 V 200 mA
IGDRV(SNK) Gate driver sink current VGDRV = 1 V 400 mA
VISNS(OC) Overcurrent detection threshold VIN = 8 V to 30 V, TJ = 25°C to 125°C 376 400 424 mV
OVERVOLTAGE PROTECTION (OVP)
VOVPTH Output voltage OVP threshold 2.95 3.02 3.09 V
IOVP Leakage current –100 0 100 nA
VIFB_OVP IFBx over voltage threshold PWM ON 38 V
LED SHORT DETECTION
IFBP LED short detection sourcing current VFBP = 1 V 0.247 0.25 0.253 IISET
FAULT INDICATOR
IFLT_H Leakage current in high impedance VFLT = 24 V 1 nA
IFLT_L Sink current at low output VFLT = 1 V 1 2 mA
THERMAL SHUTDOWN
Tshutdown 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 RFSW = 200 kΩ 187 200 213 kHz
Dmax Maximum duty cycle ƒSW = 200 kHz 90% 94% 98%
ton(min) Minimum pulse width 200 ns
fEA Error amplifier crossover frequency 1000 kHz

6.7 Typical Characteristics

TPS61196 G003_SLVSBG1.png
Figure 1. Dimming Linearity
TPS61196 G055_SLVSBG1.png
Figure 3. DC Load Efficiency
TPS61196 G006_SLVSBG1.png
Figure 5. Recommended Minimum Headroom Voltage
TPS61196 G008_SLVSBG1.gif
1% Dimming
Figure 7. Start-up Waveform
TPS61196 G010_SLVSBG1.gif
0.1% Dimming
Figure 9. Dimming Waveform
TPS61196 G012_SLVSBG1.gif
1% Dimming
Figure 11. Shutdown Waveform
TPS61196 G014_SLVSBG1.gif
1% Dimming
Figure 13. LED Open Protection
TPS61196 G016_SLVSBG1.gif
1% Dimming
Figure 15. LED Short Protection
TPS61196 G018_SLVSBG1.gif
1% Dimming
Figure 17. IFB Short-to-Ground Protection
TPS61196 G004_SLVSBG1.png
Figure 2. Dimming Linearity at Low Dimming Duty Cycle
TPS61196 G005_SLVSBG1.png
Figure 4. Switching Frequency Setting
TPS61196 G007_SLVSBG1.gif
Figure 6. Boost Switching Waveform
TPS61196 G009_SLVSBG1.gif
100% Dimming
Figure 8. Start-up Waveform
TPS61196 G011_SLVSBG1.gif
2% Dimming
Figure 10. Dimming Waveform
TPS61196 G013_SLVSBG1.gif
100% Dimming
Figure 12. Shutdown Waveform
TPS61196 G015_SLVSBG1.gif
100% Dimming
Figure 14. LED Open Protection
TPS61196 G017_SLVSBG1.gif
100% Dimming
Figure 16. LED Short Protection
TPS61196 G019_SLVSBG1.gif
100% Dimming
Figure 18. IFB Short-to-Ground Protection