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VIN SW

GND

CTRL

COMP

20 mA

TPS61161

ON/OFF

DIMMING

CONTROL

38 V Max

22 Hm

1 Fm

220 nF

set

1 Fm

L1: TDK VLCF5020T-220MR75-1

C1: Murata GRM188R61E105K

C2: Murata GRM21BR71H105K

D1: ONsemi MBR0540T1

V 3 V to 18 V

TPS61160

TPS61161

www.ti.com

SLVS791C –NOVEMBER 2007–REVISED APRIL 2012

White LED Driver With Digital and PWM Brightness Control in 2mm x 2mm

QFN Package

Check for Samples: TPS61160, TPS61161

FEATURES

DESCRIPTION

With a 40-V rated integrated switch FET, the

• 2.7V to 18V Input Voltage Range

TPS61160/1 is a boost converter that drives LEDs in

• 26V Open LED Protection (TPS61160)

series. The boost converter runs at 600kHz fixed

38V Open LED Protection (TPS61161)

switching frequency to reduce output ripple, improve

conversion efficiency, and allows for the use of small

• 200mV Reference Voltage With ±2% Accuracy

external components.

• Flexible Digital and PWM Brightness Control

The default white LED current is set with the external

• Built-in Soft Start

sensor resistor Rset, and the feedback voltage is

• Up to 90% Efficiency

regulated to 200mV, as shown in the typical

• 2mm × 2mm × 0.8mm 6-pin QFN Package With

application. During the operation, the LED current can

Thermal Pad

be controlled using the 1-wire digital interface

( Easyscale™ protocol) through the CTRL pin.

Alternatively, a pulse width modulation (PWM) signal

APPLICATIONS

can be applied to the CTRL pin through which the

• Cellular Phones

duty cycle determines the feedback reference

• Portable Media Players

voltage. In either digital or PWM mode, the

TPS61160/1 does not burst the LED current;

• Ultra Mobile Devices

therefore, it does not generate audible noises on the

• GPS Receivers

output capacitor. For maximum protection, the device

• White LED Backlighting for Media Form Factor

features integrated open LED protection that disables

Display

the TPS61160/1 to prevent the output voltage from

exceeding the IC's absolute maximum voltage ratings

during open LED conditions.

The TPS61160/1 is available in a space-saving,

2mm × 2mm QFN package with thermal pad.

Figure 1. Typical Application of TPS61161

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2Easyscale is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (27 pages)

PAGE 1
TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 White LED Driver With Digital and PWM Brightness Control in 2mm x 2mm QFN Package Check for Samples: TPS61160, TPS61161 FEATURES DESCRIPTION • • With a 40-V rated integrated switch FET, the TPS61160/1 is a boost converter that drives LEDs in series. The boost converter runs at 600kHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows for the use of small external components.
PAGE 2
TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
PAGE 3
TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 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 range, VIN IQ Operating quiescent current into VIN Device PWM switching no load 2.7 ISD Shutdown current CRTL=GND, VIN = 4.
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TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com ELECTRICAL CHARACTERISTICS (continued) VIN = 3.
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TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 FUNCTIONAL BLOCK DIAGRAM C2 D1 1 Rset 4 L1 FB SW Reference Control Error Amplifer OLP Vin 6 COMP 2 C1 PWM Control C3 5 CTRL Soft Start-up Ramp Generator + Current Sensor Oscillator GND 3 TYPICAL CHARACTERISTICS TABLE OF GRAPHS FIGURE Efficiency TPS61160/1 VIN = 3.
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TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs OUTPUT CURRENT 100 100 VI = 3.6 V 4 LEDs VI = 4.2 V 6 LEDs 90 90 8 LEDs VI = 3 V 80 Efficiency - % Efficiency - % 80 10 LEDs 70 VI = 3.6 V 70 60 60 4 (12.8 V), 6 (19.2 V) LEDs 8 (25.6 V),10 (32 V) LEDs 50 50 6 LEDs - TPS61160 40 40 0 10 20 30 Output Current - mA 40 50 0 10 20 30 Output Current - mA 40 Figure 2. Figure 3.
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TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 FB VOLTAGE vs PWM DUTY CYCLE OUTPUT RIPPLE at PWM DIMMING 200 PWM 2 V/div 10 kHz, 40 kHz FB Voltage - mV 160 120 VOUT 20 mV/div AC 80 ILED 10 mA/div 40 0 0 20 40 60 PWM Duty Cycle - % 80 100 t - 100 ms/div Figure 8. Figure 9. SWITCHING WAVEFORM START-UP CTRL 5 V/div SW 20 V/div VOUT 20 mV/div AC VOUT 10 V/div COMP 500 mV/div IL 200 mA/div IL 200 mA/div t - 1 ms/div t - 2 ms/div Figure 10. Figure 11.
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TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com DETAILED DESCRIPTION OPERATION The TPS61160/1 is a high efficiency, high output voltage boost converter in a small package size. The device is ideal for driving white LED in series. The serial LED connection provides even illumination by sourcing the same output current through all LEDs, eliminating the need for expensive factory calibration. The device integrates 40V/0.
PAGE 9
TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 LED BRIGHTNESS DIMMING MODE SELECTION The CTRL pin is used for the control input for both dimming modes, PWM dimming and 1 wire dimming. The dimming mode for the TPS61160/1 is selected each time the device is enabled. The default dimming mode is PWM dimming. To enter the 1 wire mode, the following digital pattern on the CTRL pin must be recognized by the IC every time the IC starts from the shutdown mode. 1.
PAGE 10
TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com For optimum performance, use the PWM dimming frequency in the range of 5kHz to 100kHz. The requirement of minimum dimming frequency comes from the EasyScale detection delay and detection time specification in the dimming mode selection. Since the CTRL pin is logic only pin, adding an external RC filter applied to the pin does not work. VBG 200 mV CTRL Error Amplifier COMP FB Figure 14.
PAGE 11
TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 Table 1.
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TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com Table 2. EasyScale™ Bit Description BYTE Device Address Byte 72 hex Data byte BIT NUMBER NAME TRANSMISSION DIRECTION 7 DA7 0 MSB device address 6 DA6 1 5 DA5 1 4 DA4 3 DA3 2 DA2 0 1 DA1 1 DESCRIPTION 1 IN 0 0 DA0 0 LSB device address 7 (MSB) RFA Request for acknowledge.
PAGE 13
TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 All bits are transmitted MSB first and LSB last. Figure 16 shows the protocol without acknowledge request (Bit RFA = 0), Figure 16 with acknowledge (Bit RFA = 1) request. Prior to both bytes, device address byte and data byte, a start condition must be applied. For this, the CTRL pin must be pulled high for at least tstart (2μs) before the bit transmission starts with the falling edge.
PAGE 14
TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com APPLICATION INFORMATION MAXIMUM OUTPUT CURRENT The overcurrent limit in a boost converter limits the maximum input current and thus maximum input power for a given input voltage. Maximum output power is less than maximum input power due to power conversion losses. Therefore, the current limit setting, input voltage, output voltage and efficiency can all change maximum current output.
PAGE 15
TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 TPS61160/1 has built-in slope compensation to avoid sub-harmonic oscillation associated with current mode control. If the inductor value is lower than 10μH, the slope compensation may not be adequate, and the loop can be unstable. Therefore, customers need to verify the inductor in their application if it is different from the recommended values. Table 3.
PAGE 16
TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com LAYOUT CONSIDERATIONS As for all switching power supplies, especially those high frequency and high current ones, layout is an important design step. If layout is not carefully done, the regulator could suffer from instability as well as noise problems. To reduce switching losses, the SW pin rise and fall times are made as short as possible.
PAGE 17
TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 ADDITIONAL TYPICAL APPLICATIONS L1 10 mH Vin 3 V to 5 V C1 1 mF D1 C2 0.47 mF TPS61160 ON/OFF DIMMING CONTROL VIN SW CTRL FB COMP GND Rset 10 W C3 220 nF 20 mA L1: Murata LQH3NPN100NM0 C1: Murata GRM188R61A105K C2: Murata GRM188R61E474K D1: ONsemi MBR0540T1 Figure 18. Li-Ion Driver for 6 White LEDs L1 10 mH D1 D2 C1 1 mF C2 0.
PAGE 18
TPS61160 TPS61161 SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 www.ti.com L1 22 mH Vin 3 V to 5 V D1 C2 C1 TPS61161 ON/OFF DIMMING CONTROL VIN SW CTRL FB COMP GND C3 220 nF Rset 10 W L1: TDK VLCF5020T-220MR75-1 C1: Murata GRM188R61A105K C2: Murata GRM21BR71H105K D1: ONsemi MBR0540T1 20mA Figure 20.
PAGE 19
TPS61160 TPS61161 www.ti.com SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012 REVISION HISTORY Changes from Original (November 2007) to Revision A • Page Added the Duty cycle to the Recommended Operating Conditions Table ........................................................................... 2 Changes from Revision A (September 2008) to Revision B Page • Changed Features item From: 26V Open LED Protection for 6 LEDs (TPS61160) To: 26V Open LED Protection (TPS61160) .................................
PAGE 20
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
PAGE 22
PACKAGE MATERIALS INFORMATION www.ti.com 18-Jan-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPS61160DRVR SON DRV 6 3000 180.0 8.4 2.3 2.3 1.15 4.0 8.0 Q2 TPS61160DRVR SON DRV 6 3000 180.0 8.4 2.3 2.3 1.15 4.0 8.0 Q2 TPS61160DRVT SON DRV 6 250 180.0 8.4 2.3 2.3 1.15 4.0 8.
PAGE 23
PACKAGE MATERIALS INFORMATION www.ti.com 18-Jan-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS61160DRVR SON DRV 6 3000 210.0 185.0 35.0 TPS61160DRVR SON DRV 6 3000 210.0 185.0 35.0 TPS61160DRVT SON DRV 6 250 210.0 185.0 35.0 TPS61160DRVT SON DRV 6 250 210.0 185.0 35.0 TPS61161DRVR SON DRV 6 3000 210.0 185.0 35.0 TPS61161DRVT SON DRV 6 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.