TPS75105YFFR;TPS75103YFFR;TPS75105DSKT;TPS75105DSKR;TPS75103YFFT;中文规格书,Datasheet资料

VENAVENBVBATTTPS7510x YFF9-Ball WCSP(T op View)TPS7510x DSK2,5mm x 2,5mm SON-10(T op View)12345109876ENBENAD1AD2AGNDISETVIND1BD2BNCGNDTPS7510x SBVS080H–SEPTEMBER2006–REVISED JANUARY2010 Low Dropout,Two-Bank LED Driver with PWM Brightness ControlFEATURES DESCRIPTION•Regulated Output Current with2%LED-to-LED The TPS7510x linear low dropout(LDO)matching Matching LED current source is optimized for low powerkeypad and navigation pad LED backlighting •Drives Up to Four LEDs at25mA Each in aapplications.The device provides a constant current Common Cathode Topologyto up to four unmatched LEDs organized in two banks •28mV Typical Dropout Voltage Extends Usable of two LEDs each in a common-cathode topology.Supply Range in Li-Ion Battery Applications Without an external resistor,the current source •Brightness Control Using PWM Signals defaults to factory-programmable,preset current levelwith±0.5%accuracy(typical).An optional external •Two2-LED Banks with Independent Enableresistor can be used to set initial brightness to and PWM Brightness Control per Bankuser-programmable values with higher accuracy.•No Internal Switching Signals—Eliminates EMI Brightness can be varied from off to full brightness by •Default LED Current Eliminates External inputting a pulse width modulation(PWM)signal oneach Enable pin.Each bank has independent enable Componentsand brightness control,but current matching is done –Default values from3mA to10mA(in1mAto all four channels concurrently.The input supply increments)available using innovativerange is ideally suited for single-cell Li-Ion battery factory EEPROM programming supplies and the TPS7510x can provide up to25mA–Optional external resistor can be used for per LED.high-accuracy,user-programmable currentNo internal switching signals are used,eliminating •Over-Current and Over-Temperature troublesome electromagnetic interference(EMI).The Protection TPS7510x is offered in an ultra-small,9-ball,0.4mmball-pitch wafer chip-scale package(WCSP)and a •Available in Wafer Chip-Scale Package2,5mm×2,5mm,10-pin SON package,yielding a or2,5mm×2,5mm SON-10very compact total solution size ideal for mobilehandsets and portable backlighting applications.The APPLICATIONSdevice is fully specified over T J=–40°C to+85°C.•Keypad and Display Backlighting•White and Color LEDs•Cellular Handsets•PDAs and SmartphonesPlease be aware that an important notice concerning availability,standard warranty,and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.All trademarks are the property of their respective owners.PRODUCTION DATA information is current as of publication date.Copyright©2006–2010,Texas Instruments Incorporated Products conform to specifications per the terms of the TexasInstruments standard warranty.Production processing does notnecessarily include testing of all parameters.TPS7510xSBVS080H–SEPTEMBER2006–REVISED This integrated circuit can be damaged by ESD.Texas Instruments recommends that all integrated circuits be handled with appropriate precautions.Failure to observe proper handling and installation procedures can cause damage.ESD damage can range from subtle performance degradation to complete device failure.Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.ORDERING INFORMATION(1)PRODUCT ID OPTIONS(2)TPS7510x yyyz X is the nominal default diode output current(for example,3=3mA,5=5mA,and0=10mA).YYY is the package designator.Z is the reel quantity(R=3000,T=250).(1)For the most current package and ordering information see the Package Option Addendum at the end of this document,or see the TIweb site at .(2)Default set currents from3mA to10mA in1mA increments are available through the use of innovative factory EEPROM programming.Minimum order quantities may apply.Contact factory for details and availability.ABSOLUTE MAXIMUM RATINGS(1)Over operating temperature range(unless otherwise noted).PARAMETER VALUEV IN range–0.3V to+7.0VV ISET,V ENA,V ENB,V DX range–0.3V to V INI DX for D1A,D2A,D1B,D2B35mAD1A,D2A,D1B,D2B short circuit duration IndefiniteContinuous total power dissipation Internally limitedJunction temperature(T J)–55°C to+150°CStorage temperature–55°C to+150°C(1)Stresses above these ratings may cause permanent damage.Exposure to absolute maximum conditions for extended periods maydegrade device reliability.These are stress ratings only,and functional operation of the device at these or any other conditions beyond those specified is not implied.DISSIPATION RATINGSDERATING FACTORABOVEBOARD PACKAGE R q JC R q JA T A=+25°C T A<+25°C T A=+70°C T A=+85°C Low-K(1)YFF55°C/W208°C/W 4.8mW/°C480mW264mW192mW YFF55°C/W142°C/W7.0mW/°C704mW387mW282mW High-K(2)DSK40°C/W60.6°C/W17mW/°C1650mW908mW660mW (1)The JEDEC low-K(1s)board used to derive this data was a3inch×3inch,two-layer board with2ounce copper traces on top of theboard.(2)The JEDEC high-K(2s2p)board used to derive this data was a3inch×3inch,multi-layer board with1ounce internal power andground planes and2ounce copper traces on top and bottom of the board.RECOMMENDED OPERATING CONDITIONSPARAMETER MIN TYP MAX UNIT V IN Input voltage 2.7 5.5VI DX Operating current per LED325mAt PWM On-time for PWM signal33m s T J Operating junction temperature range–40+85°C2Submit Documentation Feedback Copyright©2006–2010,Texas Instruments IncorporatedTPS7510xSBVS080H –SEPTEMBER 2006–REVISED JANUARY 2010ELECTRICAL CHARACTERISTICSOver operating junction temperature range (T J =–40°C to +85°C),V IN =3.8V,DxA and DxB =3.3V,R SET =32.4k Ω,and ENA and ENB =3.8V,unless otherwise noted.Typical values are at T A =+25°C.PARAMETERTEST CONDITIONSMINTYP MAX UNIT I SHDN Shutdown supply currentV ENA,B =0V,V DX =0V 0.03 1.0m A I SET =open,V IN =4.5V 170200m A YFF package I GNDGround currentI DX =5mA,V IN =3.8V 170230m A DSK package T A =+25°C024%YFF Current matching05%ΔI Dpackage (I DXMAX –I DXMIN /I DXMAX )×100%T A =–40°C to +85°CDSK 06%packageΔI DX %/ΔV IN Line regulation 3.5V ≤V IN ≤4.5V,I DX =5mA 2.0%/V ΔI DX %/ΔV DXLoad regulation1.8V ≤V DX ≤3.5V,I DX =5mA 0.8%/VDropout voltage of any I DXnom =5mA 28100V DO DX current sourcemV I DXnom =15mA70(V DX at I DX =0.8×I DX,nom )V ISET Reference voltage for current set1.1831.225 1.257V YFF 0.53%package I SET =open,I OPEN Diode current accuracy(1)V DX =V IN –0.2VDSK 0.54%packageI SET I SET pin current range 2.562.5m Ak I SET to I DX current ratio (1)420V IH Enable high level input voltage 1.2V V IL Enable low level input voltage 0.4V V ENA =3.8V 5.0 6.1I INA Enable pin A (V ENA )input current m A V ENA =1.8V 2.2V ENB =3.8V 4.0 4.9I INB Enable pin B (V ENB )input current m AV ENB =1.8V1.8Delay from ENA and ENB =low to t SD Shutdown delay timereach shutdown current 51330m s(I DX =0.1×I DX,nom )Shutdown,temp increasing +165T SDThermal shutdown temperature °CReset,temp decreasing+140(1)Average of all four I DX outputs.Copyright ©2006–2010,Texas Instruments Incorporated Submit Documentation Feedback 3TPS7510xSBVS080H–SEPTEMBER2006–REVISED Table1.Recommended(1%Tolerance)Set Resistor ValuesR SET(kΩ)I SET(m A)I DX(mA)(1)511 2.4 1.0255 4.8 2.01697.2 3.01279.6 4.110212.0 5.084.514.5 6.173.216.77.064.918.97.956.221.89.251.124.010.146.426.411.142.229.012.239.231.313.136.533.614.134.036.015.132.437.815.930.140.717.128.742.717.926.745.919.325.548.020.224.350.421.223.252.822.222.155.423.321.557.023.920.559.825.1(1)I DX=(V SET/R SET)×k.4Submit Documentation Feedback Copyright©2006–2010,Texas Instruments Incorporated12345109876NOTE (1): Not connectedGNDENB ENA D1A D2A GNDI SET V IN D1B D2B NC(1)TPS7510xSBVS080H –SEPTEMBER 2006–REVISED JANUARY 2010PIN ASSIGNMENTSYFF PACKAGE DSK PACKAGE9-BALL WCSP 2,5mm ×2,5mm SON-10(TOP VIEW)(TOP VIEW)TERMINAL FUNCTIONSINPUT/NAMEWCSPSONOUTPUTDESCRIPTIONEnable pin,Bank A.Driving this pin high turns on the current source to Bank A outputs.Driving this pin low turns off the current source to Bank A outputs.An applied PWM signal reduces the LED current (between 0mA and the maximum ENA A32Icurrent set by I SET )as a function of the duty cycle of the PWM signal.ENA and ENB can be tied together.ENA can be left OPEN or connected to GND if not used.See the Application Information section for more details.D1A B33O Diode source current output,Bank A.Connect to LED anode.D2AC34ODiode source current output,Bank A.Connect to LED anode.Enable pin,Bank B.Driving this pin high turns on the current source to Bank B outputs.Driving this pin low turns off the current source to Bank B outputs.An applied PWM signal reduces the LED current (between 0mA and the maximum ENB A21Icurrent set by I SET )as a function of the duty cycle of the PWM signal.ENA and ENB can be tied together.ENB can be left OPEN or connected to GND if not used.See the Application Information section for more details.V IN B29I Supply Input GND C25,Pad —GroundAn optional resistor can be connected between this pin and GND to set theI SET A110O maximum current through the LEDs.If no resistor is connected,I SET defaults to the internally-programmed value.D1B B18O Diode source current output,Bank B.Connect to LED anode.D2B C17O Diode source current output,Bank B.Connect to LED anode.NC—6—Not connected.Copyright ©2006–2010,Texas Instruments Incorporated Submit Documentation Feedback 5D1AD2AD1BD2BV IN ENBI SETENATPS7510xSBVS080H –SEPTEMBER 2006–REVISED JANUARY 2010FUNCTIONAL BLOCK DIAGRAM6Submit Documentation Feedback Copyright ©2006–2010,Texas Instruments Incorporated0.5mA/div1V/divI OUTV IN20s/divm 30100102040Duty Cycle (%)I (m A )O U T 2520151050506070809020mA/div1V/divI OUTENA = ENB20s/divm 0.5mA/div1V/divI OUTV IN20s/divm 20mA/div1V/divI OUTENB20s/divm0.0600.200.020.040.08V V -(V)IN OUT I (m A )O U T 2520151050.100.120.140.160.18TPS7510xSBVS080H –SEPTEMBER 2006–REVISED JANUARY 2010TYPICAL CHARACTERISTICSOver operating junction temperature range (T J =–40°C to +85°C),V IN =3.8V,DxA and DxB =3.3V,R SET =32.4k Ω,and ENAand ENB =high,unless otherwise noted.Typical values are at T A =+25°C.LED CURRENT vs DUTY CYCLE (f =300Hz)LINE TRANSIENT (600mV Pulse)Figure 1.Figure 2.LINE TRANSIENT (300mV Pulse)DIMMING RESPONSE (Both Channels)Figure 3.Figure 4.DIMMING RESPONSE (Single Channel)OUTPUT CURRENT vs HEADROOM VOLTAGEFigure 5.Figure 6.Copyright ©2006–2010,Texas Instruments Incorporated Submit Documentation Feedback 71402042046050060100180R (k )W SET I (m A )O U T 28262422201816141210864202202603003403805020100304060R (k )W SET I (m A )O U T 28262422201816141210864207080904.02.55.53.03.54.5V (V)IN I (A )m Q 1801751701651601555.0+85C°+25C°-°40CI (m A )O U T V (V)IN 5.45.35.25.15.04.94.84.74.63.44.44.95.43.95.920-40-20040T emperature (C)°I (m A )O U T 5.45.35.25.15.04.94.84.74.66080851.54.00.51.02.0V (V)OUT I (m A )O U T 20181614121086422.53.03.5TPS7510xSBVS080H –SEPTEMBER 2006–REVISED JANUARY 2010TYPICAL CHARACTERISTICS (continued)Over operating junction temperature range (T J =–40°C to +85°C),V IN =3.8V,DxA and DxB =3.3V,R SET =32.4k Ω,and ENA and ENB =high,unless otherwise noted.Typical values are at T A =+25°C.OUTPUT CURRENT vs R SETOUTPUT CURRENT vs R SETFigure 7.Figure 8.TPS75105OUTPUT CURRENT vs INPUT VOLTAGEGROUND CURRENT vs INPUT VOLTAGER SET =OpenFigure 9.Figure 10.TPS75105OUTPUT CURRENT vs TEMPERATURER SET =OpenOUTPUT CURRENT vs OUTPUT VOLTAGEFigure 11.Figure 12.8Submit Documentation Feedback Copyright ©2006–2010,Texas Instruments IncorporatedR= ISET K V´ISETILEDTPS7510x SBVS080H–SEPTEMBER2006–REVISED JANUARY2010APPLICATIONS INFORMATIONLIMITATIONS ON LED FORWARDVOLTAGESSETTING THE OUTPUT CURRENT LEVELThe TPS7510x is a linear current source The TPS7510x is a quad matched current source.implementing LDO regulator building blocks. Each of the four current source output levels is set byTherefore,there are some limitations to the forward a single reference current.An internal voltage(output)voltages that can be used while maintaining reference of1.225V(nominal)in combination with aaccurate operation.The first limitation is the resistor sets the reference current level.Thismaximum LED forward voltage.Because LDO reference current is then mirrored onto each of thetechnology is employed,there is the dropout voltage four outputs with a ratio of typically420:1.Theto consider.The TPS7510x is an ultra-low dropout resistor required to set the LED current is calculateddevice with typical dropouts in the range of30mV at using Equation1:5mA.Care must be taken in the design to ensure thatthe difference between the lowest possible inputvoltage(for example,battery cut-off)and the highestpossible forward voltage yields at least100mV of where:headroom.Headroom levels less than dropout •K is the current ratio decrease the accuracy of the current source(see •V ISET is the internal reference voltage Figure6).•I LED is the desired LED current(1)The other limitation to consider is the minimum output For example,to set the LED current level to10mA,a voltage required to yield accurate operation.The resistor value of51.1kΩis required.This value sets current source employs NMOS MOSFETs,and a up a reference current of23.9m A(1.22V/51.1kΩ).In minimum forward LED voltage of approximately1.5V turn,this reference current is mirrored to each output on the output is required to maintain highest current source,resulting in an output current of10mA accuracy.The TPS7510x is ideal for white LEDs and (23.9m A×420).color LEDs with forward voltages greater than1.5V.This range includes red LEDs that have typical The TPS7510x offers two methods for setting theforward voltages of1.7V.output current levels.The LED current is set either byconnecting a resistor(calculated using Equation1)USE OF EXTERNAL CAPACITORSfrom the I SET pin to GND,or leaving I SET unconnectedto employ the factory-programmed R SET resistance.The TPS7510x does not require the use of any The internal programmed resistance is implemented external capacitors for stable operation.Nominal using high-precision processing and yields a stray and/or power-supply decoupling capacitance on reference current accuracy of0.5%,nominal.the input is adequate for stable operation.Capacitors Accuracy using external resistors is subject to the are not recommended on the outputs because they tolerance of the external resistor and the accuracy of are not needed for stability.the internal reference voltage.USE OF UNUSED OUTPUTS OR TYINGThe TPS7510x automatically detects the presence ofOUTPUTS TOGETHERan external resistor by monitoring the current out ofthe I SET pin.Current levels in excess of3m A signify Unused outputs may be left unconnected or tied tothe presence of an external resistor and the device the VIN supply.While open outputs are acceptable,uses the external resistor to set the reference current.tying unused outputs to the VIN supply increases ESDIf the current from I SET is less than3m A,the device protection.Connecting unused output to ground defaults to the preset internal reference set resistor.violates the minimum recommended output voltage, The TPS7510x is available with eight preset current results in current levels that potentially exceed the levels,from3mA to10mA(per output)in1mA set/preset LED current and should be avoided. increments.Solutions using the preset internalConnecting outputs in parallel is an acceptable way current level eliminate an external component,of increasing the amount of LED current drive.This thereby increasing accuracy and reducing cost.configuration is a useful trick when the higher currentlevel is a multiple of the preset value.Copyright©2006–2010,Texas Instruments Incorporated Submit Documentation Feedback9TPS7510xSBVS080H –SEPTEMBER 2006–REVISED JANUARY 2010USE OF ENABLE PINS FOR PWM DIMMINGLOAD REGULATIONThe TPS7510x divides control of the LED outputs into The TPS7510x is designed to provide very tight load two banks of two current sources each.Each bank is regulation.In the case of a fixed current source,the controlled by the use of an independent,active-high output load change is a change in voltage.Tight load enable pin (ENA and ENB).The enable pin can be regulation means that output voltages (LED forward used for standard ON/OFF operation of the current voltages)with large variations can be used without source,driven by standard logic levels from impacting the fixed current being sourced by the processor GPIO pins,for example.Drive EN high to output or the output-to-output current matching.The turn on the bank of LEDs;drive EN low to turn off the permissible variation on the output not only allows for bank of LEDs.large variations in white LED forward voltages,but even permits the use of different color LEDs on Another use of the enable pin is for LED dimming.different outputs with minimal effect on output current.LED brightness is a function of the current level being driven across the diode and the time that current is LINE REGULATIONbeing driven through the diode.The perceived brightness of an LED can be changed by either The TPS7510x is also designed to provide very tight varying the current level or,more effectively,by line regulation.This architecture allows for voltage changing the time in which that current is present.transient events to occur on the power supply When a PWM signal is input into the enable pin,the (battery)without impacting the fixed output current duty cycle (high or ON time)determines how long the levels or the output to output current matching.A fixed current is driven across the LEDs.Reducing or prime example of such a supply transient event is the increasing that duration has the effect of dimming or occurrence of a transmit pulse on the radio of a brightening the LED,without having to employ the mobile handset.These transient pulses can cause more complex method of varying the current level.variations of 300mV and 600mV on the supply to the This technique is particularly useful for reducing LED TPS7510x.The line regulation limitation is that the brightness in low ambient light conditions,where LED lower supply voltage level of the event does not brightness is not required,thereby decreasing current cause the input to output voltage difference to drop consumption.The enable pins can also be used for below the dropout voltage range.LED blinking,varying blink rates based on system status.Although providing many useful applications,PWM dimming does have a minimum duty cycle required to achieve the required current level.The recommended minimum on time of the TPS7510x is approximately 33m s.On times less than 33m s result in reductions in the output current by not allowing enough time for the output to reach the desired current level.Also,having both enables switching together,asynchronously,or having one enable on at all times,impacts the minimum recommended on time (see Figure 4and Figure 5).If one enable is already on,the speed at which the other channel turns on is faster than if both channel were turning on together or if the other channel is off.Therefore,connecting one enable on Figure 13.Typical Application Diagramallows for approximately 10m s to 12m s shorter minimum on times of the switching enable channel.Unused enable pins can be left unconnected or connected to ground to minimize current consumption.Connecting unused enable pins to ground increases ESD protection.If connected to V IN ,a small amount of current drains through the enable input (see the Electrical Characteristics table).10Submit Documentation Feedback Copyright ©2006–2010,Texas Instruments Incorporated分销商库存信息:TITPS75105YFFR TPS75103YFFR TPS75105DSKT TPS75105DSKR TPS75103YFFT TPS75105YFFT TPS75105EVM-174。