SLVS791E November   2007  – July 2016 TPS61160 , TPS61161

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 Timing Requirements
    7. 6.7 Typical Characteristics
      1. 6.7.1 Table Of Graphs
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Soft Start-Up
      2. 7.3.2 Open LED Protection
      3. 7.3.3 Current Program
      4. 7.3.4 LED Brightness Dimming Mode Selection
      5. 7.3.5 Undervoltage Lockout
      6. 7.3.6 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown
      2. 7.4.2 PWM Brightness Dimming
      3. 7.4.3 Digital One-Wire Brightness Dimming
      4. 7.4.4 External PWM Dimming
    5. 7.5 Programming
      1. 7.5.1 EasyScale: One-Wire Digital Dimming
  8. 8 Application and Implementation Information
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Application of TPS61161
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Maximum Output Current
          2. 8.2.1.2.2 Inductor Selection
          3. 8.2.1.2.3 Schottky Diode Selection
          4. 8.2.1.2.4 Compensation Capacitor Selection
          5. 8.2.1.2.5 Input and Output Capacitor Selection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Li-Ion Driver for 6 White LEDs with External PWM Dimming Network
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Choosing Component Values
        3. 8.2.2.3 Application Curves
      3. 8.2.3 Li-Ion Driver for 6 White LEDs
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Curves
      4. 8.2.4 Li-Ion Driver for 8 White LEDs
        1. 8.2.4.1 Design Requirements
        2. 8.2.4.2 Detailed Design Procedure
        3. 8.2.4.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
      1. 11.3.1 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 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
VI Supply voltages on VIN(2) –0.3 20 V
Voltages on CTRL(2) –0.3 20 V
Voltage on FB and COMP(2) –0.3 3 V
Voltage on SW(2) –0.3 40 V
TJ Operating junction temperature 40 150 °C
Tstg Storage temperature –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 pin.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±4000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1000
(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

MIN NOM MAX UNIT
VI Input voltage 2.7 18 V
VO Output voltage VIN 38 V
L Inductor(1) 10 22 μH
ƒdim PWM dimming frequency 5 100 kHz
tPWM_MIN Minimum pulse width at PWM input 50 ns
CIN Input capacitor 1 μF
CO Output capacitor(1) 0.47 10 μF
TA Operating ambient temperature –40 85 °C
TJ Operating junction temperature –40 125 °C
(1) These values are recommended values that have been successfully tested in several applications. Other values may be acceptable in other applications but should be fully tested by the user.

6.4 Thermal Information

THERMAL METRIC(1) TPS61160, TPS61161 UNIT
DRV (WSON)
6 PINS
RθJA Junction-to-ambient thermal resistance 96.1 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 89 °C/W
RθJB Junction-to-board thermal resistance 65.9 °C/W
ψJT Junction-to-top characterization parameter 3.2 °C/W
ψJB Junction-to-board characterization parameter 66.3 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 40.8 °C/W
(1) For more information about traditional and new thermal metrics, see Semiconductor and IC Package Thermal Metrics.

6.5 Electrical Characteristics

VIN = 3.6 V, CTRL = VIN, TA = –40°C to +85°C, typical values are at TA = 25°C (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
VI Input voltage 2.7 18 V
IQ Operating quiescent current into VIN Device PWM switching no load 1.8 mA
ISD Shutdown current CRTL=GND, VIN = 4.2 V 1 μA
UVLO Undervoltage lockout threshold VIN falling 2.2 2.5 V
Vhys Undervoltage lockout hysterisis 70 mV
ENABLE AND REFERENCE CONTROL
V(CTRLh) CTRL logic high voltage VIN = 2.7 V to 18 V 1.2 V
V(CTRLl) CTRL logic low voltage VIN = 2.7 V to 18 V 0.4 V
R(CTRL) CTRL pull down resistor 400 800 1600 kΩ
VOLTAGE AND CURRENT CONTROL
VREF Voltage feedback regulation voltage 196 200 204 mV
V(REF_PWM) Voltage feedback regulation voltage under brightness control VFB = 50 mV 47 50 53 mV
VFB = 20 mV 17 20 23
IFB Voltage feedback input bias current VFB = 200 mV 2 μA
ƒS Oscillator frequency 500 600 700 kHz
Dmax Maximum duty cycle VFB = 100 mV, measured on the drive signal of the switching FET 93% 95%
tmin_on Minimum on pulse width 40 ns
Isink Comp pin sink current 100 μA
Isource Comp pin source current 100 μA
Gea Error amplifier transconductance 240 320 400 μmho
Rea Error amplifier output resistance 6 MΩ
ƒea Error amplifier crossover frequency 5 pF connected to COMP 500 kHz
POWER SWITCH
RDS(on) N-channel MOSFET on-resistance VIN = 3.6 V 0.3 0.6 Ω
VIN = 3 V 0.7
ILN_NFET N-channel leakage current VSW = 35 V, TA = 25°C 1 μA
OC and OLP
ILIM N-Channel MOSFET current limit D = Dmax 0.56 0.7 0.84 A
ILIM_Start Start up current limit D = Dmax 0.4 A
tHalf_LIM Time step for half current limit 5 ms
Vovp Open LED protection threshold Measured on the SW pin, TPS61160
TPS61161 		25
37		 26
38		 27
39		 V
V(FB_OVP) Open LED protection threshold on FB Measured on the FB pin, percentage of VREF
VREF= 200 mV and 20 mV		 50%
VACKNL Acknowledge output voltage low Open drain, Rpullup =15 kΩ to VIN 0.4 V
THERMAL SHUTDOWN
Tshutdown Thermal shutdown threshold 160 °C
Thysteresis Thermal shutdown threshold hysteresis 15 °C

6.6 Timing Requirements

MIN NOM MAX UNIT
OC and OLP
tREF VREF filter time constant 180 μs
tstep VREF ramp up time 213 μs
EasyScale
tvalACKN Acknowledge valid time(1) 2 μs
tACKN Duration of acknowledge condition(1) 512 μs
toff CTRL pulse width to shutdown, CTRL high to low 2.5 ms
tes_det Easy Scale detection time(2) 260 μs
tes_delay EasyScale detection delay, Measured from CTRL high 100 μs
tes_win EasyScale detection window time 1 ms
tSTART Start time of program stream 2 μs
tEOS End time of program stream 2 360 μs
tH_LB High time low bit, logic 0 2 180 μs
tL_LB Low time low bit, logic 0 2 × tH_LB 360 μs
tH_HB High time high bit, logic 1 2 × tL_HB 360 μs
tL_HB Low time high bit, logic 1 2 180 μs
(1) Acknowledge condition active 0, this condition will only be applied in case the RFA bit is set. Open drain output, line needs to be pulled high by the host with resistor load.
(2) To select EasyScale mode, the CTRL pin has to be low for more than tes_det during tes_win.

6.7 Typical Characteristics

6.7.1 Table Of Graphs

FIGURE
Efficiency TPS61160/1 VIN = 3.6 V; 4, 6, 8, 10 LEDs; L = 22 μH Figure 1
Efficiency TPS61160 Figure 2
Efficiency TPS61161 Figure 3
Current limit TA = 25°C Figure 4
Current limit Figure 5
EasyScale step Figure 6
PWM dimming linearity VIN = 3.6 V; PWM Freq = 10 kHz and 40 kHz Figure 6
Output ripple at PWM dimming 8 LEDs; VIN = 3.6 V; ILOAD = 20 mA; PWM Freq = 10 kHz Figure 8
Switching waveform 8 LEDs; VIN = 3.6 V; ILOAD = 20 mA; L = 22 μH Figure 9
Start-up 8 LEDs; VIN = 3.6 V; ILOAD = 20 mA; L =22 μH Figure 10
Open LED protection 8 LEDs; VIN = 3.6 V; ILOAD = 20 mA; L = 22 μH Figure 11
TPS61160 TPS61161 eff_io_lvs791.gif
Figure 1. Efficiency vs Output Current
TPS61160 TPS61161 eff3_io_lvs791.gif
Figure 3. Efficiency vs Output Current
TPS61160 TPS61161 eff2_io_lvs791.gif
Figure 2. Efficiency vs Output Current
TPS61160 TPS61161 scl_dc_lvs791.gif
Figure 4. Switch Current Limit vs Duty Cycle
TPS61160 TPS61161 scl_ta_lvs791.gif
Figure 5. Switch Current Limit vs Temperature
TPS61160 TPS61161 v_dc_lvs791.gif
Figure 7. FB Voltage vs PWM Duty Cycle
TPS61160 TPS61161 scope2_col_lvs791.gif
Figure 9. Switching Waveform
TPS61160 TPS61161 scope4_col_lvs791.gif
Figure 11. Open LED Protection
TPS61160 TPS61161 v_scale_lvs791.gif
Figure 6. FB Voltage vs EasyScale Step
TPS61160 TPS61161 scope1_col_lvs791.gif
Figure 8. Output Ripple At PWM Dimming
TPS61160 TPS61161 scope3_col_lvs791.gif
Figure 10. Start-Up