R1218x SERIES Step-up DC/DC converter for White LED Backlight NO.EA-166-070905 OUTLINE The R1218x Series are PWM control type step-up DC/DC converter ICs with low supply current. The R1218x is fully dedicated to drive White LED with constant current. Each of these ICs consists of an NMOS FET, an oscillator, a PWM comparator, a voltage reference unit, an error amplifier, an under voltage lockout circuit (UVLO), an over-voltage protection circuit (OVP), and so on. The R1218x can drive white LEDs with high efficiency with low supply current. A diode is built-in the R1218xxx1A, therefore it is possible to drive up to 4LEDs without an external diode. The R1218xxx2A, an external diode is necessary, however, up to 6 serial LEDs can be driven with the R1218xxx2A. Constant current can be set with an external resistance value. Dimming control is possible by PWM signal for CE pin. Feedback voltage is 0.2V, therefore power loss by current setting resistance is small and efficiency is good. Maximum duty cycle is internally fixed, Typ. 91%. LEDs can be driven from low voltage. Protection circuits are the current limit of Lx peak current, the over voltage limit of output, and the under voltage lockout function. Packages are standard SOT-23-6 and very tiny PLP1820-6. FEATURES • • • • • • • • • Operating voltage.......................................... 1.8V to 5.5V Built-in 400mA, 1.5Ω, 20V Nch MOSFET (R1218xxx1A) Built-in 400mA, 1.5Ω, 29V Nch MOSFET (R1218xxx2A) Oscillator Frequency (PWM control)............. 1.2MHz Maximum Duty Cycle .................................... Typ. 91% Feedback Voltage ......................................... Typ. 0.2V UVLO Threshold Voltage .............................. Typ. 1.6V (Hysteresis Typ. 0.1V) Lx Current limit Protection............................. Typ. 700mA Over Voltage Protection (OVP) Threshold .... Typ. 9.5V (R1218x021A) Typ. 14.0V (R1218x031A) Typ. 18.5V (R1218x041A) Typ. 23.0V (R1218x052A) Typ. 27.5V (R1218x062A) • LED dimming control..................................... by external PWM signal (Frequency 200Hz to 5kHz) to CE pin by feedback voltage and filtered PWM signal (high frequency) • Packages ...................................................... SOT-23-6 or PLP1820-6 APPLICATION • White LED Backlight for portable equipment 1 R1218x BLOCK DIAGRAMS R1218xxx1A VFB VIN Error Amp LX VOUT UVLO PWM Comp R Switch Control Q S OVP Vref OSC Slope Compensation Current Protect Current sense Σ Shutdown delay Chip Enable CE GND R1218xxx2A VFB VIN Error Amp LX VOUT UVLO PWM Comp R Q S Switch Control OVP Vref OSC Slope Compensation Current Protect Current sense Σ Shutdown delay Chip Enable CE 2 GND R1218x SELECTION GUIDE The OVP threshold voltage and the package for the ICs can be selected at the user's request. The selection can be available by designating the part number as shown below; R1218xxxxx-xx-x ←Part Number ↑ a Code a b c d ↑ b ↑ ↑ c d Contents Designation of Package Type: N: SOT-23-6 K: PLP1820-6 Designation of OVP threshold and with/without of built-in diode 021A: 9.5V with built-in diode 031A: 14.0V with built-in diode 041A: 18.5V with built-in diode 052A: 23.0V without built-in diode 062A: 27.5V without built-in diode Designation of Taping Type: Ex. TR (refer to Taping Specifications; for SOT-23-6 and PLP1820-6) Designation of composition of plating: −F : Lead free plating (SOT-23-6) None : Au plating (PLP1820-6) 3 R1218x PIN CONFIGURATIONS • SOT-23-6 6 5 • PLP1820-6 Top View 4 Bottom View 6 5 4 4 5 6 1 2 3 3 2 1 (mark side) 1 2 3 PIN DESCRIPTIONS • • SOT-23-6 Pin No. Symbol 1 CE 2 VOUT 3 Description PLP1820-6 Pin No. Symbol Description Chip Enable Pin 1 CE Chip Enable Pin Output Pin 2 VFB Feedback Pin VIN Power Supply Input Pin 3 Lx Switching Pin (Open Drain Output) 4 Lx Switching Pin (Open Drain Output) 4 GND 5 GND Ground Pin 5 VIN 6 VFB Feedback Pin 6 VOUT Ground Pin Power Supply Input Pin Output Pin ∗ Tab in the parts have GND level. (They are connected to the back side of this IC.) Do not connect to other wires or land patterns. ABSOLUTE MAXIMUM RATINGS Symbol (GND=0V) Item Rating Unit VIN VIN Pin Voltage 6.5 V VCE CE Pin Voltage −0.3 to VIN+0.3 V VFB VFB Pin Voltage −0.3 to VIN+0.3 V VOUT VOUT Pin Voltage VLX ILX LX Pin Voltage R1218xxx1A −0.3 to 22 R1218xxx2A −0.3 to 32 R1218xxx1A −0.3 to 22 R1218xxx2A −0.3 to 32 LX Pin Current 800 Note1 PD Power Dissipation (SOT-23-6) * Power Dissipation (PLP1820-6) * Note1 420 V mA mW 880 Topt Operating Temperature Range −40 to 85 °C Tstg Storage Temperature Range −55 to 125 °C *Note1) For Power Dissipation, please refer to PACKAGE INFORMATION to be described. 4 V R1218x ELECTRICAL CHARACTERISTICS • R1218xxxxA Symbol Topt=25°C Item Conditions Min. VIN Operating Input Voltage IDD Supply Current VIN=5.5V, VFB=0V, Lx at no load Istandby Standby Current VIN=5.5V, VCE=0V VUVLO1 UVLO Detector Threshold VIN falling VUVLO2 UVLO Released Voltage VIN rising VCEH CE Input Voltage "H" VIN=5.5V VCEL CE Input Voltage "L" VIN=1.8V RCE CE Pull Down Resistance VIN=3.6V tshtdn CE Shutdown Delay Time VIN=3.6V VFB Voltage VIN=3.6V VFB Voltage Temperature Coefficient VIN=3.6V, −40°C IFB VFB Input Current VIN=5.5V, VFB=0V or 5.5V RON Switch On Resistance VIN=3.6V, ISW=100mA ILXleak Switch Leakage Current VFB ∆VFB/ ∆Topt Typ. Max. Unit 5.5 V 0.5 1.0 mA 0 3.0 µA 1.6 1.7 V VUVLO1 +0.1 1.8 V 1.8 1.5 1.5 600 V 1200 0.5 V 2200 kΩ 10 0.19 < = Topt < = 0.20 ms 0.21 ppm /°C ±150 85°C −0.1 V 0.1 µA Ω 1.5 R1218xxx1A VLX=20V 0 3.0 µA R1218xxx2A VLX=29V 0 3.0 µA 700 1000 mA Switch Current Limit VIN=3.6V Vf Diode Forward Voltage R1218xxx1A IDIODE=100mA 0.8 V IDIODEleak Diode Leakage Current R1218xxx1A VOUT=20V, VLX=0V 10 µA fosc Oscillator Frequency VIN=3.6V, VOUT=VFB=0V 1.0 1.2 Maxduty Maximum Duty Cycle VIN=3.6V, VOUT=VFB=0V 86 91 R1218x021A 8.5 9.5 10.5 R1218x031A 13.0 14.0 15.0 R1218x041A 17.0 18.5 20.0 R1218x052A 21.5 23.0 24.5 R1218x062A 26.0 27.5 29.0 ILXlim VOVP1 OVP Detector Threshold VIN=3.6V, VOUT rising 400 R1218x021A R1218x031A VOVP2 OVP Released Voltage VIN=3.6V, VOUT falling R1218x041A R1218x052A R1218x062A VOVP1 −0.5 VOVP1 −0.75 VOVP1 −1.0 VOVP1 −1.25 VOVP1 −1.5 1.4 MHz % V V 5 R1218x TYPICAL APPLICATIONS R1218x041A R1218x062A L1 22µH L1 22µH C1 1µF C2 0.22µF VIN C1 1µF C2 0.22µF LX VIN CE LX VOUT CE GND • VFB R1 10Ω VOUT GND VFB R1 10Ω LED Current setting LED current can be set with feedback resister(R1) ILED=0.2 / R1 • LED Dimming Control, Softstart (1) LED dimming control by PWM signal to CE pin LED dimming control is possible by forcing PWM signal to CE pin. When the power-on or start up with CE pin, softstart function works, however, after that, if the CE pin is set as "L" and set CE pin "H" again during the shutdown delay time, softstart function is disabled and starts up fast to normal mode, therefore 200Hz to 5kHz PWM signal is standard. By the CE pin input, LED turns on and off. Average LED current varies depending on the duty cycle of CE input. Too high frequency PWM signal is not effective because of its delay. CE VFB R1 Dimming controle by CE pin input 6 R1218x (2) Dimming control by DC voltage LED dimming control is also possible by using the DC voltage to VFB pin. LED current is adjustable by DC voltage and resisters, R1 and R2 in the following figure. ILED=(DC − 0.2) / R2 − 0.2 / R1 R2 VFB DC R1 Dimming control by DC voltage (3) Dimming control by feedback voltage and filtered PWM signal LED dimming control is also possible by using the feedback voltage and filtered PWM signal. LED current is adjustable according to the "H" level (VH) and "L" level(VL) of PWM signal and resisters, R2 VFB R3 C3 R4 R1 VH VL Dimming controle by filtered PWM signal R1, R2, R3, and R4 in the figure5. Duty=0% to 100% PWM signal duty cycle can be used up to the maximum LED current and minimum LED current as in the next formulas. ILEDMIN=(0.2 − R2 × (VH − 0.2) / (R3 + R4)) / R1 ILEDMAX=(0.2 − R2 × (VL − 0.2) / (R3 + R4)) / R1 For example, supposed that the PWM signal level is set as 2.5V/0V, to adjust the LED current range from 0mA to 20mA by the duty cycle, our recommendation external components values are, R1=10Ω, R2=5.1kΩ, R3=51kΩ, R4=5.1kΩ or around. C3 should be set large enough to regard the PWM signal as adjustable DC voltage by the filter. In this method, higher frequency control than the frequency against the CE pin can be used for dimming control. For example, if the frequency is 40kHz, 0.1µF or more capacitor is our recommendation value as C3. 7 R1218x • Selection of Inductors The peak current of the inductor at normal mode can be calculated as next formula: ILXpeak=1.25 × ILED × VOUT / VIN + 0.5 × VIN × (VOUT − VIN) / (L × VOUT × fosc) When the start-up or dimming control by CE pin, transient current flows, the peak current must be equal or less than the current limit of the IC. The peak current should not beyond the rating current of the inductor. For example, for 4 serial LED drive from VIN=3.6V, recommendation value of the inductor is 22µH or more. • Selection of Capacitors Set 1µF or more value bypass capacitor C1 between VIN pin and GND pin as close as posible. Set 0.22µF or more capacitor C2 between VOUT and GND pin. TEST CIRCUITS A VIN LX R1218x Series CE GND VOUT VFB Supply Current Test Circuit VIN LX R1218x Series CE VOUT GND OSCILLOSCOPE VFB UVLO Detector Threshold, UVLO Released Voltage VIN LX R1218x Series VOUT CE GND 8 VIN OSCILLOSCOPE VFB LX R1218x Series CE VOUT GND OSCILLOSCOPE VFB VFB Voltage, Oscillator Frequency, OVP Detector Threshold, Maximum Duty Test Circuit OVP Released Voltage Test Circuit R1218x TYPICAL CHARACTERISTICS 1) Efficiency vs. LED Current (2LED) L:LQH32CN220 (Topt=25°C) R1218x021A R1218x021A VIN=1.8V VIN=3.6V 100 90 80 70 60 50 40 30 20 10 0 Efficiency η (%) Efficiency η (%) 100 90 80 70 60 50 40 30 20 10 0 0 4 8 12 16 LED Current lLED (mA) 20 0 4 8 12 16 LED Current lLED (mA) 20 R1218x021A VIN=4.2V Efficiency η (%) 100 90 80 70 60 50 40 30 20 10 0 0 4 8 12 16 LED Current lLED (mA) 20 2). Efficiency vs. LED Current (3LED) L: LQH32CN220 (Topt=25°C) R1218x031A R1218x031A VIN=2.7V VIN=3.6V 100 90 80 70 60 50 40 30 20 10 0 Efficiency η (%) Efficiency η (%) 100 90 80 70 60 50 40 30 20 10 0 0 4 8 12 16 LED Current lLED (mA) 20 0 4 8 12 16 LED Current lLED (mA) 20 9 R1218x R1218x031A VIN=4.2V Efficiency η (%) 100 90 80 70 60 50 40 30 20 10 0 0 4 8 12 16 LED Current lLED (mA) 20 3) Efficiency vs. LED Current (4 LED ) L: LQH32CN220 (Topt=25°C) R1218x041A R1218x041A VIN=2.7V 0 4 8 12 16 LED Current lLED (mA) 20 R1218x041A VIN=4.2V Efficiency η (%) 100 90 80 70 60 50 40 30 20 10 0 0 10 VIN=3.6V 100 90 80 70 60 50 40 30 20 10 0 Efficiency η (%) Efficiency η (%) 100 90 80 70 60 50 40 30 20 10 0 4 8 12 16 LED Current lLED (mA) 20 0 4 8 12 16 LED Current lLED (mA) 20 R1218x 4) Efficiency vs. LED Current (6LED) L: LQH32CN220, Diode: CRS02 (Topt=25°C) R1218x062A R1218x062A VIN=2.7V VIN=3.6V 100 90 80 70 60 50 40 30 20 10 0 Efficiency η (%) Efficiency η (%) 100 90 80 70 60 50 40 30 20 10 0 0 4 8 12 16 LED Current lLED (mA) 20 0 4 8 12 16 LED Current lLED (mA) 20 R1218x062A VIN=4.2V Efficiency η (%) 100 90 80 70 60 50 40 30 20 10 0 0 4 8 12 16 LED Current lLED (mA) 20 5) PWM Dimming Control (2 LED) VIN=3.6V, R1=10Ω 5-1. Duty vs. LED Current (Topt=25°C) LED Current lLED (mA) R1218x021A 25.0 22.5 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0 5kHz 1kHz 200Hz 0 20 40 60 Duty (%) 80 100 11 R1218x 5-2. Output Voltage Waveform (Topt=25°C) R1218x021A R1218x021A fosc=5kHz fosc=200Hz 0 10 Output Voltage 5 Output Voltage VOUT (V) 5 CE Input Voltage VCE(V) Output Voltage VOUT (V) CE Input Voltage CE Input Voltage 5 0 10 Output Voltage 5 CE Input Voltage VCE (V) 10 10 0 0 0 0.8 1.6 2.4 Time (ms) 0 3.2 0.04 0.08 0.12 Time (ms) 0.16 6) PWM Dimming Control (4 LED) VIN=3.6V, R1=10Ω 6-1. Duty vs. LED Current (Topt=25°C) LED Current lLED (mA) R1218x041A 25.0 22.5 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0 5kHz 1kHz 200Hz 0 20 40 60 Duty (%) 80 100 6-2. Output Voltage Waveform (4 LED) (Topt=25°C) R1218x041A R1218x041A fosc=200Hz fosc=5kHz 0 20 Output Voltage 10 0 5 0 20 Output Voltage 10 0 0 12 CE Input Voltage 0.8 1.6 2.4 Time (ms) 3.2 0 0.04 0.08 0.12 Time (ms) 0.16 CE Input Voltage VCE (V) 5 Output Voltage VOUT (V) CE Input Voltage 10 CE Input Voltage VCE (V) Output Voltage VOUT (V) 10 R1218x 7) PWM Dimming Control (6 LED) VIN=3.6V, R1=10Ω 7-1. Duty vs. LED Current (Topt=25°C) LED Current lLED (mA) R1218x062A 25.0 22.5 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0 5kHz 1kHz 200Hz 0 20 40 60 Duty (%) 80 100 7-2. Output Voltage Waveform (6 LED) (Topt=25°C) R1218x062A R1218x062A fosc=200Hz fosc=5kHz 0 20 Output Voltage 10 0 CE Input Voltage 0 20 Output Voltage 10 0 0 0.8 1.6 2.4 Time (ms) 0 3.2 8) VFB Voltage vs. Temperature 0.08 0.12 Time (ms) 0.16 0.215 0.210 0.205 0.200 0.195 0.190 0 25 50 Temperature Topt (°C) 75 85 UVLO Detector Threshold UVLO1 (V) R1218x041A VIN=3.6V 0.185 -40 -25 0.04 9) UVLO Detector Threshold/Released Voltage vs. Temperature R1218x041A VFB Voltage VFB (V) 5 CE Input Voltage VCE (V) 5 Output Voltage VOUT (V) CE Input Voltage 10 CE Input Voltage VCE (V) Output Voltage VOUT (V) 10 VIN=3.6V 1.74 1.70 UVLO Released 1.66 1.62 1.58 UVLO Detector 1.54 1.50 -40 -25 0 25 50 Temperature Topt (°C) 75 85 13 R1218x 10) Oscillator Frequency vs. Temperature 11) Maximum duty cycle vs. Temperature R1218x041A R1218x041A VIN=3.6V 1400 99 1350 97 1300 95 Maxduty (%) Oscillator Frequency fosc (kHz) VIN=3.6V 1250 1200 1150 1100 91 89 87 1050 1000 -40 -25 93 0 25 50 Temperature Topt (°C) 85 -40 -25 75 85 12) OVP Detector Threshold/Released Voltage vs. Temperature R1218x041A 360 20.0 320 19.5 OVP Detector Threshold 18.5 OVP Released Voltage 17.5 17.0 16.5 -40 -25 0 25 50 Temperature Topt (°C) 75 85 14) LX Current Limit vs. Temperature R1218x041A VIN=3.6V Lx Current Limit Ilim (mA) 1000 900 800 700 600 500 400 300 -40 -25 14 VIN=3.6V 20.5 0 25 50 Temperature Topt (°C) 75 85 Supply Current ICC (µA) OVP Detector Threshold VOVP1 (V) VIN=3.6V 18.0 75 85 13) Supply Current vs. Temperature R1218x041A 19.0 0 25 50 Temperature Topt (°C) 280 240 200 160 120 80 40 0 -40 -25 0 25 50 Temperature Topt (°C) 75 85 R1218x 15) OVP Transient Response (Topt=25°C) R1218x041A OVP Detector Threshold VOVP1 (V) OVP Detector Threshold VOVP1 (V) R1218x021A 15.0 12.5 OVP Voltage 10.0 7.5 5.0 2.5 0 0 20 40 60 Time (ms) 80 100 80 100 25 OVP Voltage 20 15 10 5 0 0 20 40 60 Time (ms) 80 100 OVP Detector Threshold VOVP1 (V) R1218x062A 35 OVP Voltage 30 25 20 15 10 5 0 0 20 40 60 Time (ms) 16) Efficiency dependence on inductors (4 LED) R1218x041A (Intemal Diode Type) VIN=3.6V 90 Efficiency η (%) 85 80 75 70 65 LQH32CN220K53 LQH32CN100K53 GLF2012T220K GLF2012T100K 60 55 50 0 5 10 15 LED Current lLED (mA) 20 15 PACKAGE INFORMATION • PE-SOT-23-6-0611 SOT-23-6 (SC-74) Unit: mm PACKAGE DIMENSIONS 2.9±0.2 +0.2 1.1 −0.1 1.9±0.2 (0.95) (0.95) 6 5 0.8±0.1 0 to 0.1 2 +0.1 0.15 −0.05 +0.1 0.4−0.2 0.2 Min. 1 2.8±0.3 +0.2 1.6 −0.1 4 TAPING SPECIFICATION +0.1 φ1.5 0 4.0±0.1 2.0±0.05 4 1 2 3 2.0Max. 3.5±0.05 5 3.2 6 8.0±0.3 1.75±0.1 0.3±0.1 3.3 4.0±0.1 ∅1.1±0.1 TR User Direction of Feed TAPING REEL DIMENSIONS REUSE REEL (EIAJ-RRM-08Bc) (1reel=3000pcs) 21±0.8 +1 60 0 2±0.5 0 180 −1.5 13±0.2 11.4±1.0 9.0±0.3 PACKAGE INFORMATION PE-SOT-23-6-0611 POWER DISSIPATION (SOT-23-6) This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board. This specification is based on the measurement at the condition below: Measurement Conditions Standard Land Pattern Environment Mounting on Board (Wind velocity=0m/s) Board Material Glass cloth epoxy plactic (Double sided) Board Dimensions 40mm × 40mm × 1.6mm Copper Ratio Top side : Approx. 50% , Back side : Approx. 50% Through-hole φ0.5mm × 44pcs Measurement Result (Topt=25°C,Tjmax=125°C) Standard Land Pattern Free Air Power Dissipation 420mW 250mW Thermal Resistance θja=(125−25°C)/0.42W=263°C/W 400°C/W 500 40 On Board 420 400 300 200 40 Power Dissipation PD(mW) 600 100 0 0 25 50 75 85 100 Ambient Temperature (°C) 125 150 Power Dissipation Measurement Board Pattern IC Mount Area Unit : mm RECOMMENDED LAND PATTERN 2.4 1.0 0.7 MAX. 0.95 0.95 1.9 (Unit: mm) PACKAGE INFORMATION • PE-PLP1820-6-0611 PLP1820-6 Unit: mm PACKAGE DIMENSIONS 1.6±0.1 1.80 0.20±0.1 B A 4 0.05 M AB 6 0.25±0.1 ×4 0.25±0.1 2.00 1.0±0.1 0.05 INDEX 3 1 0.5 0.6Max. 0.1NOM. 0.3±0.1 Bottom View Attention: Tabs or Tab suspension leads in the parts have VDD or GND level.(They are connected to the reverse side of this IC.) Refer to PIN DISCRIPTION. Do not connect to other wires or land patterns. 0.05 4.0±0.1 2.4 3.5±0.05 2.0±0.05 8.0±0.3 1.5 +0.1 0 0.25±0.1 1.75±0.1 TAPING SPECIFICATION 1.1±0.1 2.2 1.1Max. 4.0±0.1 TR User Direction of Feed TAPING REEL DIMENSIONS REUSE REEL (EIAJ-RRM-08Bc) (1reel=5000pcs) (R5323K,R5325K : 1reel=3000pcs) 11.4±1.0 2±0.5 21±0.8 ∅60 +1 0 0 ∅180 −1.5 ∅13±0.2 9.0±0.3 PACKAGE INFORMATION PE-PLP1820-6-0611 POWER DISSIPATION (PLP1820-6) This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board. This specification is based on the measurement at the condition below: Measurement Conditions Standard Land Pattern Environment Mounting on Board (Wind velocity=0m/s) Board Material Glass cloth epoxy plactic (Double sided) Board Dimensions 40mm × 40mm × 1.6mm Copper Ratio Top side : Approx. 50% , Back side : Approx. 50% Through-hole φ0.54mm × 30pcs Measurement Result (Topt=25°C,Tjmax=125°C) Standard Land Pattern Power Dissipation 880mW Thermal Resistance θja=(125−25°C)/0.88W=114°C/W 40 On Board 1000 880 800 600 40 Power Dissipation PD(mW) 1200 400 200 0 0 25 50 75 85 100 Ambient Temperature (°C) 125 150 Power Dissipation Measurement Board Pattern IC Mount Area Unit : mm RECOMMENDED LAND PATTERN 0.35 0.75 0.45 1.00 0.5 0.5 1.60 0.25 (Unit: mm) MARK INFORMATION ME-R1218N-0610 R1218N SERIES MARK SPECIFICATION • SOT-23-6 (SC-74) 1 • 2 3 1 , 2 : Product Code (refer to Part Number vs. Product Code) 3 , 4 : Lot Number 4 Part Number vs. Product Code Part Number Product Code 1 2 R1218N021A 2 A R1218N031A 2 B R1218N041A 2 C R1218N022A 2 D R1218N032A 2 E R1218N042A 2 F R1218N052A 2 G R1218N062A 2 H MARK INFORMATION ME-R1218K-0610 R1218K SERIES MARK SPECIFICATION • PLP1820-6 to 1 5 • 1 2 3 4 5 6 , 4 6 Part Number vs. Product Code Part Number Product Code 1 2 3 4 R1218K021A Y 0 0 1 R1218K031A Y 0 0 2 R1218K041A Y 0 0 3 R1218K022A Y 0 0 4 R1218K032A Y 0 0 5 R1218K042A Y 0 0 6 R1218K052A Y 0 0 7 R1218K062A Y 0 0 8 : Product Code (refer to Part Number vs. Product Code) : Lot Number