Sub PMIC With Dual-Output Boost Converter With I2C .
RT4832ASub PMIC with Dual-Output Boost Converter with I2CInterface for Flash LED and Backlight LED, Dual-Output LCDBias and DSVGeneral DescriptionThe RT4832A is an integrated total power solution forFlash LED Driver, Backlight WLED Driver, and DSVDriver. Flash LED Driver provides up to 2-CH 1.5Aapplications. Back Light WLED Driver supports up to36V output for 10 WLEDs applications. And it provides1024 steps LED current with logarithmic/linear curve.DSV is implemented by one single inductor boost andinverting charge pump, which provide customersminimum EVB area compared to dual inductors. Thenegative output power (CPOUT) comes from boostoutput (LCMOUT). It also provides DSV positivevoltage (POS), which power noise is reduce by passingthough LDO. Their ranges can be programmed from 4V to 6V per 50mV step respectively. Flash BoostConverter operates at 2MHz/4MHz frequency. The4MHZ frequency solution allows tinny and low-profilecomponents. Torch Mode Current can be set fromFeatures 25mA to 375mA per 25mA step. And Strobe ModeCurrent range is from 100mA to 1.5A per 100mA step.DSV drives TFT-LCD panels up to 10” (from SFF toMFF like tablets). These two output rails are usuallyconnected to Source Driver IC. Wide input voltagerange from 2.5V to 5.5V optimizes the single-cellbattery applications (Li-Ion, Ni-Li, Li-Polymer) andwhich symmetrical output current is up to 80mA.The RT4832A provides complete protection such asVIN under voltage lockout, Vin monitor protection, overcurrent protection, over voltage protection, LED shortprotection, VOUT short protection and overtemperature protection.The RT4832A is available in WL-CSP-30B 2.24x2.64(BSC) package.Applications Smart PhonesProbable InstrumentsCopyright 2017 Richtek Technology Corporation. All rights reserved.DS4832A-00January 2017Input Voltage Range : 2.5V to 5.5VInternal Soft-start, UVLO, OTP, OCPTypical Shutdown Current : 1 A 40 to 85 C Temperature Range2CH Back Light LED Driver Drives Up to 10 WLEDs in Two Strings2 External PWM Pin Control and I CProgrammable 11 bit Linear and ExponentialBrightness LED Current Accuracy 5% ( 500 A), 3%( 5mA)2 I C Programmable OVP 18/22/25/29/33/36V2CH Flash LED Driver Torch Mode Current from 25mA to 375mA per25mA Step with 2 Channels Strobe Mode Current from 100mA to 1.5A per100mA Step with 2 Channels2 I C Programmable Flash Safety Timer from32ms to 1024ms per 32ms Step High Accurate Safety Timer 10%, CurrentAccuracy 4% ( 375mA), Current Matching 7% ( 375mA) VIN Monitor Protection from 2.5V to 3.2V per 0.1V StepSelectable Input Current Limit 1.9/2.8A2MHz/4MHz Switching Frequency for Flash LEDFlash LED1/2 Short Protection, and OutputShort ProtectionTxmask Protection by Independent PinDSV2 I C Programmable Output Voltages Flexible Boost Voltage, POS, CPOUT DefaultSetting Regulated Voltage Output : 4V to 6V per 50mVStep Positive Voltage Output : 4 to 6V per 50mv Step Negative Voltage Output : 4 to 6V per 50mVStep User Selectable Output Fast Discharge Mode oris a registered trademark of Richtek Technology Corporation.www.richtek.com1
RT4832A Float Mode when Turned OffIndependent Positive and Negative EnableControl by Two External PinsMarking InformationTrue Load Disconnect, OCP, andPositive/Negative SCP Function0X : Product CodeYMDNN : Date Code0X YMDNNOrdering InformationPin ConfigurationRT4832APackage TypeWSC : WL-CSP-30B 2.24x2.64 (BSC)(TOP VIEW)Note :A1POSRichtek products are : RoHS compliant and compatible with the GNDLEDOUTrequirements of IPC/JEDEC J-STD-020. A2LCMOUTSuitable for use in SnPb or Pb-free soldering NDWL-CSP-30B 2.24x2.64 (BSC)Typical Application CircuitL210μHD1L10.47μH to 2ENPB1ENML32.2μHA3 LCMSWC24.7μFC1E1C1LCMOUT A2POSFlashLEDF1 CPOUTC610μFCopyright 2017 Richtek Technology Corporation. All rights reserved.AGNDFlashGNDC22P10SWLEDsLED1 C5D5LED2FlashOUT E3, F3LEDGNDC510μFwww.richtek.com2LEDSW A5LEDOUT B5 E4, F4C110μFVINC82.2μFRT4832A VINLED1CPGNDC310μFC710μFA1E2, F2A4C410μFC4F5D1LCMGND B4U1is a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
RT4832AReferencePart NumberValueDescriptionC1, C3, C4,C5, C6, C7C2012X7R1A106KT0AHE10 F/10V/X5RCeramic capacitorC2C2012X7R1A475KT0AHE4.7 F/10V/X5RCeramic capacitorC8UMK316BJ225KD-T2.2 F/50V/X7RCeramic capacitorL1NR4018T1R0N1 HInductorL2NR4018T100M10 HInductorL3NR4018T2R2M2.2 HInductorD1SS1440V/1ASchottky diodeTiming DiagramSDAVIH( MIN)VIL( MAX)tSU, DATtLOWSCLtHD, DATtHIGHtSU, STOtBUFVIH( MIN)VIL( MAX)tHD, STAtfSCopyright 2017 Richtek Technology Corporation. All rights reserved.DS4832A-00January 2017PSis a registered trademark of Richtek Technology Corporation.www.richtek.com3
RT4832AFunctional Pin DescriptionPin No.Pin NamePin FunctionA1POSPositive terminal LDO output. Connect a 10 F ceramic capacitor between thispin and Ground.A2LCMOUTDSV boost converter output pin. Connect a 10 F ceramic capacitor between thispin and Ground.A3LCMSWSwitching node of DSV boost converter. Connect a 2.2μH inductor betweenLCMSW and VIN.A4LEDGNDBack light LED ground.A5LEDSWSwitch node of boost converter. Connect a 4.7 H to 10 H inductor betweenLEDSW and VIN.B1ENMEnable the CPOUT.B2ENPEnable the POS.B3ENChip enable.B4LCMGNDDSV boost converter ground pin.B5LEDOUTBack light LED boost output pin.C1C1Fly capacitor 1 positive connection of inverter charge pump.C2SDAI2C serial data input/output. An external pull-up resistor is required.C3TxmaskConfigurable power amplifier synchronization input or configurable active hightorch enable. Has an internal pull-down resistor of 400k between TX andground.C4AGNDAnalog ground.C5LED1Single output 1 for backlight LED.D1CPGNDInverter charge pump ground.D2SCLI2C serial clock input. An external pull-up resistor is required.D3STRBActive high hardware flash enable. Drive STRB high to turn on flash pulse. Hasan internal pull-down resistor of 400k between STRB and ground.D4PWMPWM dimming input for backlight LED.D5LED2Single output 2 for backlight LED.E1C2Fly capacitor 1 negative connection of inverter charge pump. Connect a 10 Fceramic capacitor between this pin and C1.E2, F2FlashLEDHigh-side current source output for flash LED.E3, F3FlashOUTStep-up flash DC-DC converter output. Connect a 10 F ceramic capacitorbetween this pin and Ground.E4, F4FlashSWDrain connection for internal N-MOSFET and synchronous P-MOSFETswitches. Connect a 0.47 to 1 H inductor between FlashSW and VIN.E5VINInput voltage connection. Connect VIN to the input supply, and bypass toGround with a 10 F or larger ceramic capacitor.F1CPOUTCharge pump negative terminal output. Connect a 10 F ceramic capacitorbetween this pin and ground.F5FlashGNDFlash boost power ground.Copyright 2017 Richtek Technology Corporation. All rights reserved.www.richtek.com4is a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
RT4832AFunctional Block DiagramVINUVLOOTPOVPLEDOUTVrbLEDSWBLPWM/DrvBack Light DC to DC CoreENLEDGNDPWMRCControl LogicOCPVrbMINFBPWMVrFOSCLED2Flash Light DC to DC CoreCurrent urrent SourcePORFlashLEDOVPENPAPRFlashOUTVin MonitorOutputShortTxmaskBack OCPPOSLCM DC to DC CorePOSSCPLDOLCMOUTAGNDC1C2X1 Negative Charge PumpfledshLCMPWM/DrvBack GateControlLCMSWCPOUTOCPNEGSCPLCMGNDCPGNDCopyright 2017 Richtek Technology Corporation. All rights reserved.DS4832A-00January 2017is a registered trademark of Richtek Technology Corporation.www.richtek.com5
RT4832AAbsolute Maximum Ratings(Note 1) Supply Voltage (VIN) ------------------------------------------------ 0.3V to 6V LED Boost Output Voltage (LEDOUT) -------------------------- 0.3V to 37V LED Switching Voltage (LEDSW) -------------------------------- 0.3V to 37V LED Current Source Voltage (LED1, LED2) ------------------- 0.3V to 36V LCM Boost Output Voltage (LCMOUT, POS) ----------------- 0.3V to 6.3V LCM Switching Voltage (LCMSW, C1) -------------------------- 0.3V to 6.3V Negative Charge Pump Switching Voltage (C2) -------------- 0.3V to 6.5V Negative Charge Pump Voltage (CPOUT) --------------------- 0.3V to 6.5V Flash Switching Voltage (FlashSW) ----------------------------- 0.3V to 6V Flash Output Voltage ------------------------------------------ 0.3V to 6V Flash LED Voltage (FlashLED) ----------------------------------- 0.3V to 6V Digital Clock Control Pins (SDA, SCL, PWM) ----------------- 0.3V to 6V Other Pins (EN, ENM, ENP, Txmask, STRB) ----------------- 0.3V to 6V Power Dissipation, PD @ TA 25 CWL-CSP-30B 2.24x2.64 (BSC) ---------------------------------- 3.15W Package Thermal Resistance(Note 2)WL-CSP-30B 2.24x2.64 (BSC), JA ---------------------------- 31.7 C/W Lead Temperature (Soldering, 10 sec.) ------------------------ 260 C Junction Temperature ---------------------------------------------- 150 C Storage Temperature Range ------------------------------------- 65 C to 150 C ESD Susceptibility(Note 3)HBM (Human Body Model) --------------------------------------- 2kVRecommended Operating Conditions(Note 4) Supply Voltage, VIN ------------------------------------------------ 2.5V to 5.5V Ambient Temperature ------------------------------------------ 40 C to 85 C Junction Temperature Range ------------------------------------ 40 C to 125 CElectrical Characteristics(VIN 3.6V, CVIN 10 F, TA 25 C, unless otherwise specified)ParameterSymbolTest ConditionsMinTypMaxUnit2.5--5.5VPower SupplyInput Voltage RangeVINUVLOUVVIN falls--2.22.3VUVLO Hysteresis VoltageUVhys3050200mVVIN Supply CurrentIQVIN rises after UVLOLCD Bias enable, Back Light turnedoff, EN H, LCMOUT 5.2V--0.5--mAVIN Shutdown CurrentISHDNVIN 5V, EN L--1-- AThermal ShutdownTSD--145-- CCopyright 2017 Richtek Technology Corporation. All rights reserved.www.richtek.com6is a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
RT4832AParameterThermal Shutdown HysteresisSymbolTest ConditionsTSDHYSMinTypMaxUnit--15-- CFlash LEDAccuracy of Flash OutputCurrent 1/2AIFL1IFLED 375mA 4--4AIFL2IFLED 25mA to 375mA 10--10FLED Sense Voltage 1/2VDSFLFlashOUT FlashLED,IFLED 750mA (per channel)--300--mvFlash 1/2 Start-up CurrentIFLSTFlashOUT 3.6V, FlashLED toGround (per channel)22.54mAFlash Pre-charge CurrentIFLPREFlashOUT VIN 0.15V40150300mAFlash Switching Frequencyf FOSC0x07[7:6] 011.822.2MHzSafety TimeouttOUT0x07[4:0] 10000, Strb goes high until0x0B[1] 0 1460512563msMaximum Duty CycleDmaxFL0x07[6] 01--70--%Flash N-MOSFET RonRonFLN2065130m Flash P-MOSFET RonRonFLP2080160m FlashOUT 3.6V%Flash N-MOSFET Current Limit IOCPFL0x07[5] 12.242.83.36AVIN Monitor VoltageVIN falls until 0x0B[4] 0 1,0x08[2:0] 100, 0x09[0] 12.822.92.98VVIN Monitor Hysteresis Voltage VMONhysVIN rises until 0x0B[4] 1 0,0x08[2:0] 100, 0x09[0] 115--%Flash Output Short VoltageVFLSHFlashOUT 1.5V for 1msec, 0x0B[5] 0 10--1.5VFlash LED 1/2 Short VoltageVFLEDSHFlashLED 1.5V for 1msec, 0x0B[2] 0 1 (per channel)0--1.5VFlash Over Voltage ProtectionVFLOVPFlashOUT VIN, 0x0B[6] 0 155.35.6VAccuracy of Back Light OutputCurrent 1/2AIBL1IBLED 5mA to 25mA 3--3AIBL2IBLED 0.5mA to 5mA 5--5Matching of Output CurrentMIBLIBLED 5mA to 25mA 3--3%BLED Sense Voltage 1/2VDSBLVIN 3V, IFBx 25mA--500--mVBack Light SwitchingFrequencyfblosc0x03[7] 10.911.1MHzMaximum Duty CycleDmaxBL0x03[7] 19093--%Back Light N-MOSFET RonRonBLN100270400m Back Light Current LimitIOCPBL0.961.21.44ABack Light Over VoltageProtectionVBLOVP0x02[7:5] 001212223VAccuracy of POS VoltageVPOS0x0E[5:0] 010100, IOUT 0mA 1--1%Accuracy of CPOUTVCPOUT0x0F[5:0] 010100, IOUT 0mA 1.5--1.5%Drop-Out VoltageVDOVLCMOUT VPOS 5.2V,IOUT 50mA--100--mVVMONBack Light LED%DSVCopyright 2017 Richtek Technology Corporation. All rights reserved.DS4832A-00January 2017is a registered trademark of Richtek Technology Corporation.www.richtek.com7
RT4832AParameterSymbolTest ConditionsMinTypMaxUnitDSV Switching Frequencyf DSV0.911.1MHzMaximum Duty CycleDMXDSV9093--%DSV N-MOSFET RonRonNDSV0.050.30.6 DSV P-MOSFET RonRonPDSV0x0F[5:0] 0101000.050.51 Charge Pump EquivalentResistanceReqx1VLCMOUT 5.2V, IOUT 50mA--2-- VPOS Discharge ResistorRDP0x0C[4] 1--70-- VCPOUT Discharge ResistorRDN0x0C[3] 1--20-- LCMOUT Current LimitIOCPLCM0x0E[5:0] 0101000.881.11.32APOS Short Protection VoltageVSCPP--0.8 xVPOS--V--VCPOUT Short ProtectionVoltageVSCPN--0.25 0.8 x( VCPOUT)Logic Control (PWM, EN, ENP, ENM, SCL, SDA, TXMASK, STRB)Input Logic LowVIL----0.4VInput Logic HighVIH1.4----VNote 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These arestress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in theoperational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affectdevice reliability.Note 2. JA is measured under natural convection (still air) at TA 25 C with the component mounted on a higheffective-thermal-conductivity four-layer test board on a JEDEC 51-7 thermal measurement standard.Note 3. Devices are ESD sensitive. Handling precaution recommended.Note 4. The device is not guaranteed to function outside its operating conditions.Copyright 2017 Richtek Technology Corporation. All rights reserved.www.richtek.com8is a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
iv)IIN(500mA/Div)VCPOUTIINTime (1ms/Div)DSV Power off with /Div)VCPOUTIINIIN(500mA/Div)Time (1ms/Div)DSV Ripple 0mAVCPOUT(20mV/Div)offset (-5V)IIN(50mA/Div)VIN 3.7V, VLCM 5.2V, VPOS 5V,VCPOUT -5V, IPOS CPOUT 0mAVIN 3.7V, VLCM 5.2V, VPOS 5V,VCPOUT -5V, IPOS CPOUT 0 to5o to 0mADSV Load set(5V)VCPOUT(20mV/Div)offset (-5V)Time (10ms/Div)Time (2ms/Div)DSV Accuracy POSDSV Ripple 50mATime (500 s/Div)Copyright 2017 Richtek Technology Corporation. All rights reserved.January 2017VIN 3.7V, 0x0C 0x48, 0x0D 0x18,0x0E 0x14, 0x0F 0x140.80.6Accuracy (%)VCPOUT(20mV/Div)offset (-5V)DS4832A-001.0VIN 3.7V, VLCM 5.2V, VPOS 5V,VCPOUT -5V, IPOS CPOUT 50mAVPOS(20mV/Div)offset(5V)VIN 3.7V, VLCM 5.2V, VPOS 5V, VCPOUT - 5V, IPOS CPOUT 0mA, DSV VPOS discenable, DSV CPOUT disc enable.DSV Power OnVIN 3.7V, VLCM 5.2V, VPOS 5V, VCPOUT -5V, IPOS CPOUT 0mA, delay time Noconstraint, POS slew rate 2.8mV/us, CPOUT slewrate 2.9mV/usTypical Operating .6-0.8-1.0010203040DAC Codeis a registered trademark of Richtek Technology Corporation.www.richtek.com9
RT4832ABLED Accuracy LineartyDSV Accuracy CPOUT21.01VIN 3.7V, 0x0C 0x48, 0x0D 0x18,0x0E 0x14, 0x0F 0x140.80Accuracy (%)Accuracy 2-3-4-5-6VIN 3.7V, 2P10S, LED Brightnesscode from 0 to 2048-7-80.005-1.00102030400.010.015DAC CodeBLED Matching Linearty0.025BLED ILED vs. Brightness Code2.00.025VIN 3.7V, 2P10S, LED Brightnesscode from 0 to 20481.81.60.0201.41.2I LED (A)Matching (%)0.02I LED (A)1.00.80.0150.0100.60.40.005VIN 3.7V, 2P10S, LED Brightnesscode from 0 to 2048, 0x02[4] 10.20.00.0050.0000.010.0150.020.02502567681024 1280 1536 1792 2048BLED Efficiency vs. Input VoltageBLED ILED vs. Brightness Code900.025VIN 3.7V, 2P10S, LED Brightnesscode from 0 to 2048, 0x02[4] 08886Efficiency (%)0.020I LED (A)512Brightness CodeI LED (A)0.0150.0101MHz500kHz8482807876740.005VIN 2.5V to 5.5V, 2P10S,72ILED 25mA per string700.00002565127681024 1280 1536 1792 2048Brightness CodeCopyright 2017 Richtek Technology Corporation. All rights reserved.www.richtek.com102.533.544.555.5Input Voltage (V)is a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
RT4832AVIN 3.7V to 4.5VVIN(1V/Div)VIN 3.7V, IFLED flash 1.5A,IFLED strobe 375mA, Strobe timeout 1 024ms, 0x09 0x1C, 0x0ATxmaskBLED Line S2(1V/Div)IFLED(500mA/Div)CS1(1V/Div)Time (1ms/Div)Copyright 2017 Richtek Technology Corporation. All rights reserved.DS4832A-00January 2017Time (200ms/Div)is a registered trademark of Richtek Technology Corporation.www.richtek.com11
RT4832ARegister MapRT4832A IC slave address 7’b 0010001. I2C interface supports fast mode (bit rate up to 400kb/s).AddressAddress NameBITR/WDefault(Reset Value)0x01Vendor Code1:0R1010 RICHTEKBLED OVP7:5R/W001[000] 18V, [001] 22V, [010] 25V, [011] 29V,[100] 33V, [101 to 111] 36VBLEDMapping Code4R/W1[0] Exponential, [1] Linear.BLEDPWM Config.3R/W0[0] Active High, [1] Active Low.Reserved2:0R/W000BL SW Frequency7R/W00x02BL Ramp Rate6:3R/W0011Reserved2:1R/W000x03[0] 500kHz, [1] 1MHz[0000] 0 s, [0001] 500 s, [0010] 750 s,[0011] 1ms, [0100] 2ms, [0101] 5ms, [0110] 10ms, [0111] 20ms, [1000] 50ms, [1001] 100ms, [1010] 250ms, [1011] 800ms, [1100] 1s, [1101] 2s, [1110] 4s, [1111] 8s11th bit enable of bled brightness control[0] 10 bit brightness control, reg0x40[1] is MSB,reg0x04[2] is ignore.[1] 11 bit brightness control, reg0x40[2] is MSB.Bled11th0R/W1Reserved7:3R/W0000011th LSB2R/W1BLED BrightnessMSB1:0R/W111024 steps, MSBBLED BrightnessLSB7:0R/W111111111024 steps, LSB0x040x05DescriptionFLED LED1/2 TorchCurrent7:4R/W0011FLED LED1/2 Strobe3:0CurrentR/W11100x06Copyright 2017 Richtek Technology Corporation. All rights reserved.www.richtek.com12[0000] 25mA, [0001] 50mA, [0010] 75mA,[0011] 100mA, [0100] 125mA, [0101] 150mA,[0110] 175mA, [0111] 200mA, [1000] 225mA,[1001] 250mA, [1010] 275mA, [1011] 300mA,[1100] 325mA, [1101] 350mA, [1110 to 1111] 375mA[0000] 100mA, [0001] 200mA, [0010] 300mA,[0011] 400mA, [0100] 500mA, [0101] 600mA,[0110] 700mA, [0111] 800mA, [1000] 900mA,[1001] 1000mA, [1010] 1100mA, [1011] 1200mA, [1100] 1300mA, [1101] 1400mA,[1110 to 1111] 1500mAis a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
RT4832AAddress NameBITR/WDefault(Reset Value)FLED SW Freq.FL Current Limit7:65R/WR/W001FL Strobe Timeout4:0R/W01111dsv periodic mode7R/W0dsv freq pm6R/W0dsv en mode5R/W0Reserved4R/W0fla ovp sden3R/W1FLED VIN Monitor2:0R/W100Rst sw all7WC0[0] turn on DSV only if EN 1, [1] turn on DSVonly if (EN ENP ENM) 1-Flash OVP shutdown enable [0] Report only, [1] OVP Shutdown[000] 2.5V, [001] 2.6V, [010] 2.7V, [011] 2.8V, [100] 2.9V, [101] 3V, [110] 3.1V, [111] 3.2VSoftware reset [0] Disable, [1] ResetPWM Enable6R/W0[0] PWM Ignored, [1] PWM Enabledsv ext en5R/W0DSV external control enable [0] I2C control, [1]external pin controlStrobe Enable4R/W0[0] I2C Flash, [1] Strobe FlashTx Polarity3R/W1[0] Active Low, [1] Active HighTx Enable2R/W0[0] Tx Ignored, [1] Tx EnabledVIN Monitor Mode1R/W1[0] Torch, [1] StandbyVIN Monitor En0R/W0[0] Disable, [1] VIN Monitor EnabledRst sw7WC0Fla ch2 enb6R/W0BL OVP Disable5R/W0[0] Report only, [1] OVP ShutdownBLED1 En4R/W0[0] Disable, [1] EnableBLED2 En3R/W0[0] Disable, [1] EnableTorch/Flash2R/W0[0] Torch, [1] FlashFlash EnableBack Light Enable10R/WR/W00[0] Off, [1] Enable Flash[0] Off, [1] Enable Back LightBack Light OVP7R0[0] Normal, [1] FaultFlash OVP6R0[0] Normal, [1] FaultFlash Output Short5R0[0] Normal, [1] FaultVIN MonitorTx Interrupt43RR00[0] Normal, [1] VIN Monitor Threshold Crossed[0] Normal, [1] Tx Event OccursFLED1/2 Short2R0[0] Normal, [1] FaultFlash TimeoutThermal Shutdown10RR00[0] Normal, [1] Time out[0] Normal, [1] FaultAddress0x070x080x090x0A0x0BCopyright 2017 Richtek Technology Corporation. All rights reserved.DS4832A-00January 2017Description[00] 4MHz, [01] 2MHz[0] 1.9A, [1] 2.8A[00000] 32ms .[01111] 512ms[11111] 1024ms, each step 32msDSV periodic mode [0] always on if DSV isenable, [1] DSV periodic mode[0] 20Hz, [1] 33HzSoftware reset [0] Disable, [1] Reset excludingDSV[0] FLASH channel2 enable, [1] FLASHchannel2 disableis a registered trademark of Richtek Technology Corporation.www.richtek.com13
RT4832AAddress0x0CAddress NameBITR/WDefault(Reset Value)pwr sav7R/W0Power saving mode, [0] Disable, [1] EnableDSV VPOS en6R/W0DSV VPOS enable, [0] Disable, [1] EnableDSV VPOS gnd5R/W1DSV VPOS Ground, [0] Floating,[1] Grounding only function when VPOS isdisableDSV VPOS disc4R/W0DSV VPOS discharge 20ms when shutdown,[0] Disable, [1] EnableDSV VCPOUT en3R/W0DSV VCPOUT gnd2R/W1DSV VCPOUT disc1R/W0DSV Startup0R/W0DSV startup mode[0] closed loop, waiting 80%[1] open loop, go after soft-start dimming00DSV delay time between VPOS and VCPOUT[00] No constraint[01] 1ms[10] 2ms[11] 5msDSV delay7:6R/W0x0DVboost VoltageDSV VPOS slew5:07:6R/WR/W101000010x0EVPOS Voltage5:0DSV VCPOUT slew 7:6R/WR/W0111105:0R/WCopyright 2017 Richtek Technology Corporation. All rights reserved.www.richtek.com14DSV VCPOUT enable, [0] Disable, [1] EnableDSV VCPOUT Ground, [0] Floating,[1] Grounding only function when VCPOUT isdisableDSV VCPOUT discharge 20ms when shutdown,[0] Disable, [1] Enable[000000] 4V .[010100] 5V [101011] 6.15V (0.05V per step)VPOS rising slew rate control[00] 8.5mV/ s[01] 5.6mV/ s,[10] 4.6mV/ s[11] 2.8mV/ s[000000] 4V .[011110] 5.5V [101000] 6V (0.05V per step)10VCPOUT falling slew rate control[00] 9.9mV/ s[01] 6.2mV/ s,[10] 4.9mV/ s[11] 2.9mV/ s011100[000000] 4V .[011100] 5.4V [101000] 6V (0.05V per step)0x0FVCPOUT VoltageDescriptionis a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
RT4832AAddress0x10Address NameBITR/WDefault(Reset Value)Reserved7R0[0] Normal, [1] FaultVPOS SCP6R0[0] Normal, [1] FaultVCPOUT SCP5R0[0] Normal, [1] FaultLCMOUT OCP4R0[0] Normal, [1] FaultVPOS OCP3R0[0] Normal, [1] FaultVCPOUT OCP2R0[0] Normal, [1] FaultFlash OCP1R0[0] Normal, [1] FaultBack Light OCP0R0[0] Normal, [1] FaultCopyright 2017 Richtek Technology Corporation. All rights reserved.DS4832A-00January 2017Descriptionis a registered trademark of Richtek Technology Corporation.www.richtek.com15
RT4832AApplication InformationI2CI2C Write ControlSlave IDS00100R/W010AAData AddressPACK from SlaveACK from SlavePI2C0Read Control010Slave IDR/W00AWrite Data2PACK from SlaveSlave IDSAWrite Data1ACK from Slave10AAData AddressACK from Slave0010ACK from SlaveARead Data1ACK from MasterR/W0011AACK from SlaveARead Data2PNACK from Master VCPOUT should be higher than 150mV for goodperformance but the headroom voltage betweenDSVThe RT4832A provides programmable LCMOUT, POS,CPOUT value. Table 1 contains the detail for DSVoperation setting. The LCMOUT should be selected toprovide enough headroom for good ripple and loadtransient performance. The headroom voltage betweenLCMOUT and the maximum value of VPOS andLCMOUT and VCPOUT should not be higher than200mV to avoid the larger ripple at VCPOUT.The OCP level of POS is 250mA and CPOUT is 150mAtypically.Table 1. DSV Operation SettingChannelRangeStepRegisterDefault ValueSuggest SettingLCMOUT4V to 6.15V50mV/LSB0x0D[5:0]6V5.7VVPOS4V to 6V50mV/LSB0x0E[5:0]5.5V5.5VCPOUT 4V to 6V50mV/LSB0x0F[5:0] 5.4V 5.5VThe DSV con be controlled either by pins or register bits. Table 2 is the DSV operation control table.Table 2. DSV Operation Control TableDsv ext en DSV vpos en DSV vneg enENM pin0x09[5]0x0C[6]0x0C[3]XXXXEN pinENP pin0X1XX000Standby1001XXStandby1XX010VPOS enable1XX001VNEG enable1XX011VPOS & VNEG enable1101XXVPOS enable11011111XXXXVNEG enableVPOS & VNEG enableCopyright 2017 Richtek Technology Corporation. All rights reserved.www.richtek.com16StatusShutdownis a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
RT4832ADischarge and Short to GND FunctionThe RT4832A provides internal switch resister todischarge voltage of VPOS and CPOUT during thechannel power off. Set the 0x0C[4] 1 for VPOSdischarge enable and 0x0C [1] 1 for CPOUT dischargeenable. When the voltage discharge to GND, set the0x0C[5] 1 and 0x0C[2] 1 will keep the outputconnect to GND.Power Saving ModeThe RT4832A provides the power saving mode tobypass the input voltage to VPOS. Enable the 0x0C[7] 1 to control the high side switch of boost converterand the LDO fully turn on to save the quiescent currentand switching current. The POS is equal to Vin andCPOUT is equal to –Vin when power saving mode.Delay Time Control of POS & CPOUTThe RT4832A provides the delay time control betweenPOS and CPOUT power on and off. The bits of the0x0D[7:6] is used to set the delay time. Table 3 andFigure 2 shows the delay time and the sequence forDSV power on and off.Table 3. DSV Delay Time Control Table0x0D[7:6]Delay timePower on00NoconstraintPOS start ramp up when ENP H ordsv vpos en 1,CPOUT start ramp down when ENM H or dsv vcpout en 1.CPOUT start discharge when ENM L ordsv vcpout en 0,POS start discharge when ENP L ordsv vpos en 0.1msPOS start ramp up when ENP H ordsv vpos en 1CPOUT start ramp down after POSramp up to target and delay 1ms eventhe ENM H or dsv vcpout en 1CPOUT start discharge when ENM L ordsv vcpout en 0POS start discharge after CPOUT discharge toGND and delay 1ms even the ENP L ordsv vpos en 02msPOS start ramp up when ENP H ordsv vpos en 1CPOUT start ramp down after POSramp up to target and delay 2ms eventhe ENM H or dsv vcpout en 1CPOUT start discharge to GND when ENM Lor dsv vcpout en 0POS start discharge after CPOUT discharge toGND and delay 2ms even the ENP L ordsv vpos en 05msPOS start ramp up when ENP H ordsv vpos en 1CPOUT start ramp down after POSramp up to target and delay 5ms eventhe ENM H or dsv vcpout en 1CPOUT start discharge when ENM L ordsv vcpout en 0POS start discharge after CPOUT discharge toGND and delay 5ms even the ENP L ordsv vpos en 0011011Periodic ModeThe RT4832A supports the DSV periodic mode withthe enable bit 0x08[7] and frequency select bit 0x08[6].dsv periodic mode0x08[7]0011January 2017In the periodic mode, the enable channel of the POSand CPOUT repeat on/off. The delay time, slew rate,discharge and GND connect follow the register setting.Table 4. Periodic Mode Control Tabledsv freq pmton (ms)0x08[6]0X1X0211.6Copyright 2017 Richtek Technology Corporation. All rights reserved.DS4832A-00Power offtperiod (ms)XX5030is a registered trademark of Richtek Technology Corporation.www.richtek.com17
dtperiod0ton0tonton.000.Figure 3. Periodic Mode ControlBacklight LEDThe RT4832A provides brightness controllablebacklight LED for maximum 2P10S application. TheLED current be set via register and external PWM pin.Each channel can be control by enable bits (LED1 inregister 0x0A [4] and LED2 in register 0x0A [3]). Theramp time from one brightness current to anothercurrent can be adjusted from 0ms to 8000ms in theregister 0x03[6:3]. There are two different ways to mapBack LightEnable0x0A[0]BLED1 En0x0A[4]the brightness code (or PWM duty cycle) to the LEDcurrent: linear and exponential mapping.The RT4832A LED serial number depends on theminimum voltage of the battery and the forwardvoltage(VF) of the LED. If the minimum voltage is 2.7Vand the VF of the backlight LED is 3.2V, the maximumnumber of each string is 8.Table 5. BLED Operation Control TablePWMBLED2 EnEnablePWM pin0x0A[3]0x09[6]Status0XXXXStandby100XXLED Bias enable1100XILED1 BLED Brightness1010XILED2 BLED Brightness1110XILED1 & ILED2 BLED Brightness1101DutyILED1 (BLED Brightness*PWM Duty)1011DutyILED1 (BLED Brightness*PWM Duty)1111DutyILED1 ILD2 (BLED Brightness*PWMDuty)Copyright 2017 Richtek Technology Corporation. All rights reserved.www.richtek.com18is a registered trademark of Richtek Technology Corporation.DS4832A-00January 2017
RT4832ABrightness ControlILED 0.0122mA*Brightness Codea. PWM Brightness DimmingIn exponential mapped mode the LED current followsthe relationship:Besides programmable built-in I2C backlight LEDcurrent control, the RT4832A features a built-in PWMdimming current control by setting register 0x09[6] 1,offering a linear current dimming by external clocksource. In order to guarantee the PWM dimmingresolution (7 bit at 15kHz application), recommendingdimming frequency have to be operated at range of400Hz to 20kHz.2b. I C Brightness DimmingThe RT4832A is built-in an I2C 10-bit or 11-bitresolution brightness control with maximum 25mA perstring.When LED br
2CH Back Light LED Driver Drives Up to 10 WLEDs in Two Strings External PWM Pin Control and I 2C Programmable 11 bit Linear and Exponential Brightness LED Current Accuracy 5% ( 500 A), 3% ( 5mA) I 2C Programmable OVP 18/22/25/29/33/36V 2CH Flash LED
Power management integrated circuit (PMIC) for high performance applications QFN pin number Pin name Pin description Min Max Units 15 LDO1OUT LDO1 output 0.3 6.0 V 16 LDO1IN LDO1 input supply 0.3 6.0 V 17 VIN Main input voltage 0.3 6.0 V 18 AGND Ground 0.3 0.3 V 19 PGOOD1 SW1 PGOOD output 0.3
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3-Output Programmable Buck Regulator R 1 REV1F 1/28 FEATURES 4.5V to 14V wide input supply voltage range Built-In MOSFET and synchronous rectifier I2C programmable supplies Output voltage (0.8V to 6V) Power on sequence Soft-start timing Switching frequency (440kHz to 2.3MHz) Individual current
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1.2.7 Dual monitor set-up screen*9) This page is concerning the dual monitor usage. Use the dual monitor function Check here when you wish to use dual monitor function. OS management dual monitor Select whether it is OS management dual monitor or video card management dual monitor. It is
RIGHT SPEAKER OUT ANALOG IN/OUT DIGITAL IN VOLUME/SOURCE SUB OUT OPTICAL GND AUX 1 IN AUX IN – AUX 1 LEVEL PHONO LINE L R DOWN UP USB AUDIO LED USB PHONO OPT AUX SUB SUB SUB USB PHONO OPT AUX SUB SUB SUB Example only. Your device may differ. À titre d’exemple seulement. Votre appareil peut être différent. Este es solo un ejemplo.
Paper output cover is open. [1202] E06 --- Paper output cover is open. Close the paper output cover. - Close the paper output cover. Paper output tray is closed. [1250] E17 --- Paper output tray is closed. Open the paper output tray. - Open the paper output tray. Paper jam. [1300] Paper jam in the front tray. [1303] Paper jam in automatic .
Annex L : API Standard 650 Storage Tank Data Sheet Annex M : Requirements for Tanks Operating at Elevated Temperatures Annex P : Allowable External Loads on Tank Shell Openings Annex S : Austenitic Stainless Steel Storage Tanks Annex V : Design of Storage Tanks for External Pressure Hossein Sadeghi WELDED TANKS FOR OIL STORAGE (Rev. 0) 12 STANDARD INTRODUCTION. Hossein Sadeghi WELDED TANKS FOR .
