APW7208 1MHz, High-Efficiency, Step-Up Converter for 2 to 6 White LEDs General Description Features * * * * * Wide Input Voltage from 2.5V to 6V The APW7208 is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 6 104mV Reference Voltage white LEDs in series. The series connection allows the LED current to be iden- Fixed 1MHz Switching Frequency High Efficiency up to 88% tical for uniform brightness. Its low on-resistance of NFET and feedback voltage reduces power loss and 100Hz to 100kHz PWM Brightness Control Frequency achieves high efficiency. Fast 1MHz current-mode PWM operation is available for input and output capacitors and * * * * * Open-LED Protection * Lead Free and Green Devices Available Under-Voltage Lockout Protection a small inductor while minimizing ripple on the input supply. The OVP pin monitors the output voltage and stops Over-Temperature Protection switching if exceeds the over-voltage threshold. An internal soft-start circuit eliminates the inrush current during <1A Quiescent Current During Shutdown SOT-23-6 and TSOT-23-6 Packages start-up. The APW7208 also integrates under-voltage lockout, (RoHS Compliant) over-temperature protection and current limit circuits. The APW7208 is available in SOT-23-6 and TSOT-23-6 Applications packages. * White LED Display Backlighting * Cell Phone and Smart Phone * PDA, PMP, and MP3 * Digital Camera Pin Configuration LX 1 GND 2 FB 3 SOT-23-6 / TSOT-23-6 (Top View) Simplified Application Circuit VIN 6 VIN 5 OVP 4 EN VOUT L1 22H C1 6 2.2F 2 OFF ON 4 VIN GND EN LX OVP FB 1 5 C2 1F Up to 6 WLEDs 3 R1 5.1 ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 1 www.anpec.com.tw APW7208 Ordering and Marking Information Package Code C : SOT-23-6 CT : TSOT-23-6 Operating Ambient Temperature Range I : -40 to 85 oC Handling Code TR : Tape & Reel Assembly Material G : Halogen and Lead Free Device APW7208 Assembly Material Handling Code Temperature Range Package Code APW7208 C/CT : X - Date Code W08X Note : ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for MSL classification at lead-free peak reflow temperature. ANPEC defines "Green" to mean lead-free (RoHS compliant) and halogen free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by weight). Absolute Maximum Ratings (Note 1) Symbol VIN Parameter VIN Supply Voltage (VIN to GND) Rating Unit -0.3 ~ 7 V FB, EN to GND Voltage -0.3 ~ VIN V VLX LX to GND Voltage -0.3 ~ 34 V VOVP OVP to GND Voltage -0.3 ~ 32 V TJ Maximum Junction Temperature TSTG Storage Temperature TSDR Maximum Lead Soldering Temperature, 10 Seconds 150 C -65 ~ 150 C 260 C Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Thermal Characteristics Symbol JA Parameter Junction to Ambient Thermal Resistance Typical Value Unit 250 220 C/W (Note 2) SOT-23-6 T-SOT-23-6 Note 2: JA is measured with the component mounted on a high effective thermal conductivity test board in free air. The exposed pad of package is soldered directly on the PCB. Recommended Operating Conditions (Note 3) Symbol VIN VOUT Parameter VIN Input Voltage Converter Output Voltage Range Unit 2.5 ~ 6 V Up to 24 V CIN Input Capacitor 2.2 or higher F COUT Output capacitor 0.47 or higher F L1 Inductor 6.8 ~ 22 H TA Ambient Temperature -40 ~ 85 C TJ Junction Temperature -40 ~ 125 C Note 3: Refer to the application circuit for further information. Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 2 www.anpec.com.tw APW7208 Electrical Characteristics (Refer to figure 1 in the "Typical Application Circuits". These specifications apply over VIN = 3.6V, unless otherwise noted. TA = 25C.) Symbol Parameter APW7208 Test Conditions Unit Min. Typ. Max. TA = -40 ~ 85C, TJ = -40 ~ 125C 2.5 - 6 VFB = 0.3V, no switching SUPPLY VOLTAGE AND CURRENT VIN Input Voltage Range IDD1 IDD2 Input DC Bias Current ISD V 70 100 130 A FB = GND, switching - 1 2 mA EN = GND - - 1 A VIN Rising 2.2 2.3 2.48 V 50 100 150 mV 101 104 107 mV -50 - 50 nA 0.8 1.0 1.2 MHz - 0.6 1.2 UNDER-VOLTAGE LOCKOUT UVLO Threshold Voltage UVLO Hysteresis Voltage REFERENCE AND OUTPUT VOLTAGES VREF IFB Regulated Feedback Voltage TA = 25C FB Input Current INTERNAL POWER SWITCH FSW Switching Frequency RON Power Switch On Resistance ILIM Power Switch Current Limit - 1.2 - A -1 - 1 A 92 95 98 % Over Voltage Threshold 26 28 30 V OVP Hysteresis 1 - 4 V VOVP =24V - - 45 A VEN Rising 0.4 0.7 1 V 0.05 0.1 0.15 V VEN= 0~5V, VIN = 5V -1 - 1 A TJ Rising - 150 - C - 40 - C LX Leakage Current DMAX FB=GND VEN=0V, VLX=0V or 5V, VIN = 5V LX Maximum Duty Cycle OUTPUT OVER-VOLTAGE PROTECTION VOVP OVP Leakage Current ENABLE AND SHUTDOWN VTEN EN Voltage Threshold EN Voltage Hysteresis ILEN EN Leakage Current OVER-TEMPERATURE PROTECTION TOTP Over-Temperature Protection Over-Temperature Protection Hysteresis Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 3 www.anpec.com.tw APW7208 Typical Operating Characteristics (Refer to figure 1 in the section "Typical Application Circuits", VIN=3.6V, TA=25oC, 6WLEDs unless otherwise specified) Efficiency vs. WLED Current 95 95 90 90 85 85 80 80 Efficiency () Efficiency () Efficiency vs. WLED Current 75 VIN=5V 70 VIN=4.2V 65 75 VIN=5V 70 VIN=4.2V 65 VIN=3.6V 60 VIN=3.6V 60 VIN=3.3V 55 19.3V@20mA 6 WLEDs VIN=3.3V =POUT/PIN 50 50 0 5 10 15 20 25 30 0 5 WLED Current, ILED (mA) 15 20 25 30 Switching Frequency vs. Supply Voltage 20 1.2 Switching Frequency, FSW (MHz) 18 WLED Current, ILED (mA) 10 WLED Current, ILED (mA) WLED Current vs. PWM Duty Cycle 16 14 12 10 8 100kHz 6 4 1kHz 2 100Hz 0 1.1 1 0.9 0.8 0.7 0.6 0.5 0.4 0 20 40 60 80 100 2.5 3 PWM Duty Cycle (%) 3.5 4 4.5 5 5.5 6 Supply Voltage, VIN (V) WLED Current vs. Supply Voltage Switch ON Resistance vs. Supply Voltage 21.0 Switch ON Resistance, RON () 20.8 WLED Current, ILED (mA) 4 WLEDs 13V@20mA =POUT/PIN 55 20.6 20.4 20.2 20.0 19.8 19.6 19.4 19.2 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 19.0 2.5 3 3.5 4 4.5 5 5.5 6 2.5 Supply Voltage, VIN (V) Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 3 3.5 4 4.5 5 5.5 6 Supply Voltage, VIN (V) 4 www.anpec.com.tw APW7208 Operating Waveforms (Refer to the application circuit in the section "Typical Application Circuits", VIN=3.6V, TA=25oC, 6WLEDs unless otherwise specified) Start-up Start-up 1 1 VEN VEN VIN VIN VOUT 2 2 VOUT 3 3 IIN, 0.1A/Div IIN, 0.1A/Div 4 4 4WLEDs, L=22H, VIN=3.6V, ILED=20mA 6WLEDs, L=22H, VIN=3.6V, ILED=20mA CH1: VEN, 2V/Div, DC CH2: VIN, 2V/Div, DC CH3: VOUT, 10V/Div, DC CH4: IIN, 0.1A/Div, DC Time: 1ms/Div CH1: VEN, 2V/Div, DC CH2: VIN, 2V/Div, DC CH3: VOUT, 10V/Div, DC CH4: IIN, 0.1A/Div, DC Time: 1ms/Div Normal Operating Waveform Open-LED Protection VLX, 20V/Div, DC 1 VOUT, 10V/Div VOUT, 50mV/Div, AC 2 1 IL, 0.1A/Div 3 6WLEDs, L=22H, VIN=3.6V, ILED=20mA CH1: VLX, 20V/Div, DC CH2: VOUT, 50mV/Div, AC CH3: IL, 0.1A/Div, DC Time: 1s/Div CH1: VOUT, 10V/Div, DC Time: 20ms/Div Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 5 www.anpec.com.tw APW7208 Pin Description PIN FUNCTION NO. NAME 1 LX 2 GND 3 FB Feedback Pin. Reference voltage is 104mV. Connect this pin to cathode of the lowest LED and resistor (R1). Calculate resistor value according to R1=104mV/ILED. 4 EN Enable Control Input. Forcing this pin above 1.0V enables the device, or forcing this pin below 0.4V to shut it down. In shutdown, all functions are disabled to decrease the supply current below 1A. Do not leave this pin floating. 5 OVP Over-Voltage Protection pin. OVP is connected to the output capacitor of the converter. 6 VIN Main Supply Pin. Must be closely decoupled to the GND with a 2.2F or greater ceramic capacitor. Switch pin. Connect this pin to inductor/diode here. Power and signal ground pin. Block Diagram VIN EN OVP UVLO LX Gate Driver Control Logic OverTemperature Protection Slope Compensation Current Sense Amplifier Current Limit Oscillator Error Amplifier ICMP FB GND COMP EAMP SoftStart Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 6 VREF 104mV www.anpec.com.tw APW7208 Typical Application Circuits VIN VOUT L1 VIN 22H C1 2.2F 6 2 4 OFF ON VIN 22H LX GND OVP 1 C1 2.2F C2 1F FB 6 Up to 6 WLEDs 2 5 VIN LX GND 100Hz~100kHz APW7208 EN VOUT L1 OVP 1 C2 1F APW7208 4 3 EN FB 3 Duty=100%, ILED=20mA R1 5.1 R1 5.1 Duty=0%, LED off Figure 1. Typical 6 WLEDs Application Up to 6 WLEDs 5 Figure 2. Brightness control using a PWM signal applies to EN VIN VOUT L1 22H C1 2.2F 6 2 4 OFF ON VIN LX GND OVP FB 5 Up to 6 WLEDs 3 R2 3.2K R3 100K PWM 0V brightness control Duty=100%, LED off Duty=0%, ILED=20mA R1 = C2 1F APW7208 EN 3.3V R 2 = VREF 1 R1 5.1 VADJ R4 10K C3 0.1F ILED ,MAX R3 + VADJ,MIN - ILED ,MIN R3 - VADJ,MAX VADJ,MAX ILED ,MAX + VREF ILED ,MIN - VADJ,MIN ILED ,MIN - VREF ILED ,MAX R2 R2 V REF 1 + V ADJ - R3 R3 ILED ,MAX ,MIN Figure 3. Brightness control using a filtered PWM signal VIN L1 4.5V~6V 10H C1 10F 6 2 4 OFF ON VIN GND VOUT LX OVP 1 C2 10F 9 Strings total 5 APW7208 EN FB 3 R1 1.1 R2 1.1 Figure 4. Circuit for driving 27 WLEDs Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 7 www.anpec.com.tw APW7208 Function Description Main Control Loop Over-Temperature Protection (OTP) The APW7208 is a constant frequency current-mode The over-temperature circuit limits the junction temperature of the APW7208. When the junction temperature ex- switching regulator. During normal operation, the internal N-channel power MOSFET is turned on each cycle ceeds 150 C, a thermal sensor turns off the power MOSFET, allowing the devices to cool. The thermal sen- when the oscillator sets an internal RS latch and turned off when an internal comparator (ICMP) resets the latch. sor allows the converters to start a soft-start process and to regulate the output voltage again after the junction tem- The peak inductor current at which ICMP resets the RS latch is controlled by the voltage on the COMP node, which perature cools by 40C. The OTP is designed with a 40C hysteresis to lower the average Junction Temperature is the output of the error amplifier (EAMP). An external resistive divider connected between VOUT and ground al- (TJ) during continuous thermal overload conditions, increasing the lifetime of the device. lows the EAMP to receive an output feedback voltage VFB at FB pin. When the load current increases, it causes a Enable/Shutdown slightly decrease in VFB relative to the 104mV reference, which in turn causes the COMP voltage to increase until Driving EN to the ground places the APW7208 in shut- the average inductor current matches the new load current. down mode. When in shutdown, the internal power MOSFET turns off, all internal circuitry shuts down and the quiescnet supply current reduces to 1A maximum. VIN Under-Voltage Lockout (UVLO) The Under-Voltage Lockout (UVLO) circuit compares the This pin also could be used as a digital input allowing brightness control using a PWM signal from 100Hz to input voltage at VIN with the UVLO threshold (2.3V rising, typical) to ensure the input voltage is high enough for 100kHz. The 0% duty cycle of PWM signal corresponds to zero LEDs current and 100% corresponds to full one. reliable operation. The 100mV (typ) hysteresis prevents supply transients from causing a restart. Once the input Seggestion dimming duty range is from 7% to 100%. voltage exceeds the UVLO rising threshold, start-up begins. When the input voltage falls below the UVLO fall- Open-LED Protection ing threshold, the controller turns off the converter. In driving LED applications, the feedback voltage on the Soft-Start FB pin falls down if one of the LEDs, in series, is failed. Meanwhile, the converter unceasingly boosts the output The APW7208 has a built-in soft-start to control the Nchannel MOSFET current rise during start-up. During soft- voltage like a open-loop operation. Therefore, an overvoltage protection (OVP), monitoring the output voltage start, an internal ramp, connected to one of the inverting inputs, raise up to replace the output voltage of error am- via OVP pin, is integrated into the chip to prevent the LX and the output voltages from exceeding their maximum plifier until the ramp voltage reaches the VCOMP. voltage ratings. When the voltage on the OVP pin rises above the OVP threshold (28V typical), the converter stops Current-Limit Protection The APW7208 monitors the inductor current, flowing switching and prevents the output voltage from rising. The converter can work again when the falling OVP volt- through the N-channel MOSFET, and limits the current peak at current-limit level to prevent loads and the age falls below the OVP voltage threshold. APW7208 from damages during overload or short-circuit conditions. Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 8 www.anpec.com.tw APW7208 Application Information The peak inductor current is calculated as the following equation: Input Capacitor Selection The input capacitor (CIN) reduces the ripple of the input current drawn from the input supply and reduces noise injection into the IC. The reflected ripple voltage will be smaller when an input capacitor with larger capacitance is used. For reliable operation, it is recommended to select the capacitor with maximum voltage rating at least IPEAK = IIN(MAX ) + VIN 1.2 times of the maximum input voltage. The capacitors should be placed close to the VIN and the GND. 1 VIN (VOUT - VIN ) 2 VOUT L FSW IL IIN LX N-FET CIN IOUT D1 VOUT ESR ISW COUT Inductor Selection Selecting an inductor with low dc resistance reduces con- IL duction losses and achieves high efficiency. The efficiency is moderated while using small chip inductor which op- ILIM IPEAK erates with higher inductor core losses. Therefore, it is IL necessary to take further consideration while choosing an adequate inductor. Mainly, the inductor value deter- IIN mines the inductor ripple current: larger inductor value results in smaller inductor ripple current and lower con- ISW duction losses of the converter. However, larger inductor value generates slower load transient response. A reasonable design rule is to set the ripple current, IL, to be 30% to 50% of the maximum average inductor current, IL(AVG). The inductor value can be obtained as below, V L IN VOUT ID 2 VOUT - VIN x x F I SW OUT ( MAX ) IL IL (AVG ) IOUT Output Capacitor Selection where The current-mode control scheme of the APW7208 al- VIN = input voltage lows the usage of tiny ceramic capacitors. The higher capacitor value provides good load transients response. VOUT = output voltage Ceramic capacitors with low ESR values have the lowest output voltage ripple and are recommended. If required, FSW = switching frequency in MHz IOUT = maximum output current in amp. tantalum capacitors may be used as well. The output ripple is the sum of the voltages across the ESR and the ideal = Efficiency IL /IL(AVG) = inductor ripple current/average current output capacitor. (0.3 to 0.5 typical) To avoid the saturation of the inductor, the inductor should be rated at least for the maximum input current of the VOUT = VESR + VCOUT converter plus the inductor ripple current. The maximum input current is calculated as below: VCOUT IIN(MAX ) = V - VIN OUT V OUT FSW VESR IPEAK RESR IOUT (MAX ) VOUT VIN Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 IOUT COUT where IPEAK is the peak inductor current. 9 www.anpec.com.tw APW7208 Application Information (Cont.) Output Capacitor Selection (Cont.) Setting the LED Current For ceramic capacitor application, the output voltage ripple In figure 1, the converter regulates the voltage on the FB is dominated by the VCOUT. When choosing the input and output ceramic capacitors, the X5R or X7R with their pin, connected with the cathod of the lowest LED and the current-sense resistor R1, at 104mV (typical). Therefore, good temperature and voltage characteristics are recommended. the current (ILED), flowing via the LEDs and the R1, is calculated by the following equation: Diode Selection ILED = 104mV/R1 To achieve high efficiency, a Schottky diode must be used. The current rating of the diode must meet the peak current rating of the converter. Recommended Inductor Selection Designator Manufacturer L1 GOTREND 0.592 Saturation Current (A) 0.52 Dimensions L x W x H (mm3) 3.85 x 3.85 x 1.8 TC Code X7S X7R Rated Voltage (V) 6.3 50 Case size 0603 0805 Part Number Inductance (H) Max DCR (ohm) GTSD-32-220 22 Recommended Capacitor Selection Part Number Capacitance (F) Designator Manufacturer C1 Murata GRM188C70J225KE20 2.2 C2 Murata GRM21BR71H105KA12 1.0 Recommended Diode Selection Designator Manufacturer D1 Zowie Part Number MSCD104 Maximum average forward rectified current (A) 1.0 Maximum repetitive peak reverse voltage (V) 40 Case size 0805 Layout Consideration For all switching power supplies, the layout is an important step in the design; especially at high peak currents and switching frequencies. If the layout is not carefully done, the regulator might show noise problems and duty cycle jitter. Via To OVP L1 To Anode of WLEDs VOUT D1 C1 LX VIN C2 1. The input capacitor should be placed close to the VIN and the GND. Connecting the capacitor with VIN and GND pins by short and wide tracks without using any vias for filtering and minimizing the input voltage ripple. Via To V OUT VEN C3 R4 R3 From Cathod of WLEDs R1 2. The inductor should be placed as close as possible to the LX pin to minimize length of the copper tracks as well as the noise coupling into other circuits. R2 VADJ Via To GND Refer to Fig. 3 3. Since the feedback pin and network is a high impedance circuit, the feedback network should be routed away from the inductor. The feedback pin and feedback network should be shielded with a ground plane or track to minimize noise coupling into this circuit. Optimized APW7208 Layout 4. A star ground connection or ground plane minimizes ground shifts and noise is recommended. Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 10 www.anpec.com.tw APW7208 Package Information SOT-23-6 D e E E1 SEE VIEW A b c 0.25 A A2 e1 L A1 GAUGE PLANE SEATING PLANE VIEW A S Y M B O L SOT-23-6 MILLIMETERS MIN. INCHES MAX. A MAX. MIN. 0.057 1.45 0.00 0.15 0.000 0.006 A2 0.90 1.30 0.035 0.051 b 0.30 0.50 0.012 0.020 0.009 A1 c 0.08 0.22 0.003 D 2.70 3.10 0.106 0.122 E 2.60 3.00 0.102 0.118 1.80 0.055 0.071 E1 1.40 e 0.95 BSC e1 0.037 BSC 1.90 BSC 0.075 BSC L 0.30 0.60 0.012 0 8 0 0.024 8 Note : 1. Follow JEDEC TO-178 AB. 2. Dimension D and E1 do not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 10 mil per side. Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 11 www.anpec.com.tw APW7208 Package Information TSOT-23-6 D e E E1 SEE VIEW A c b 0.25 A A2 e1 A1 GAUGE PLANE SEATING PLANE L VIEW A S Y M B O L TSOT-23-6 INCHES MILLIMETERS MIN. MAX. MIN. MAX. A 0.75 0.80 0.030 0.031 A1 0.03 0.05 0.001 0.002 A2 0.70 0.75 0.028 0.030 b 0.30 0.50 0.012 0.020 c 0.08 0.20 0.003 0.008 D 2.70 3.10 0.106 0.122 E 2.60 3.00 0.102 0.118 E1 1.40 1.80 0.055 0.071 e 0.95 BSC 0.037 BSC e1 1.90 BSC 0.075 BSC L 0 0.30 0oC 0.60 8oC 0.012 0.024 0o C 8o C Note : 1. Followed from JEDEC TO-178 AB. 2. Dimension D and E1 do not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 10 mil per side. Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 12 www.anpec.com.tw APW7208 Carrier Tape & Reel Dimensions P0 P2 P1 A B0 W F E1 OD0 K0 A0 A OD1 B B T SECTION A-A SECTION B-B H A d T1 Application SOT-23-6 Application TSOT-23-6 A H T1 C d D W E1 F 178.02.00 50 MIN. 8.4+2.00 -0.00 13.0+0.50 -0.20 1.5 MIN. 20.2 MIN. 8.00.30 1.750.10 3.50.05 P0 P1 P2 D0 D1 T A0 B0 K0 2.00.05 1.5+0.10 -0.00 1.0 MIN. 0.6+0.00 -0.40 3.200.20 3.100.20 1.500.20 4.00.10 4.00.10 A H T1 C d D W E1 F 178.02.00 50 MIN. 8.4+2.00 -0.00 13.0+0.50 -0.20 1.5 MIN. 20.2 MIN. 8.00.30 1.750.10 3.50.05 P0 P1 P2 D0 D1 T A0 B0 K0 2.00.05 1.5+0.10 -0.00 1.0 MIN. 0.6+0.00 -0.40 3.200.20 3.100.20 1.500.20 4.00.10 4.00.10 (mm) Devices Per Unit Package Type Unit Quantity SOT-23-6 Tape & Reel 3000 TSOT-23-6 Tape & Reel 3000 Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 13 www.anpec.com.tw APW7208 Taping Direction Information SOT-23-6/TSOT-23-6 USER DIRECTION OF FEED AAAX AAAX AAAX AAAX AAAX AAAX AAAX Classification Profile Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 14 www.anpec.com.tw APW7208 Classification Reflow Profiles Profile Feature Sn-Pb Eutectic Assembly Pb-Free Assembly 100 C 150 C 60-120 seconds 150 C 200 C 60-120 seconds 3 C/second max. 3C/second max. 183 C 60-150 seconds 217 C 60-150 seconds See Classification Temp in table 1 See Classification Temp in table 2 Time (tP)** within 5C of the specified classification temperature (Tc) 20** seconds 30** seconds Average ramp-down rate (Tp to Tsmax) 6 C/second max. 6 C/second max. 6 minutes max. 8 minutes max. Preheat & Soak Temperature min (Tsmin) Temperature max (Tsmax) Time (Tsmin to Tsmax) (ts) Average ramp-up rate (Tsmax to TP) Liquidous temperature (TL) Time at liquidous (tL) Peak package body Temperature (Tp)* Time 25C to peak temperature * Tolerance for peak profile Temperature (Tp) is defined as a supplier minimum and a user maximum. ** Tolerance for time at peak profile temperature (tp) is defined as a supplier minimum and a user maximum. Table 1. SnPb Eutectic Process - Classification Temperatures (Tc) Package Thickness <2.5 mm 2.5 mm Volume mm <350 235 C 220 C 3 Volume mm 350 220 C 220 C 3 Table 2. Pb-free Process - Classification Temperatures (Tc) Package Thickness <1.6 mm 1.6 mm - 2.5 mm 2.5 mm Volume mm <350 260 C 260 C 250 C 3 Volume mm 350-2000 260 C 250 C 245 C 3 Volume mm >2000 260 C 245 C 245 C 3 Reliability Test Program Test item SOLDERABILITY HOLT PCT TCT HBM MM Latch-Up Method JESD-22, B102 JESD-22, A108 JESD-22, A102 JESD-22, A104 MIL-STD-883-3015.7 JESD-22, A115 JESD 78 Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 15 Description 5 Sec, 245C 1000 Hrs, Bias @ Tj=125C 168 Hrs, 100%RH, 2atm, 121C 500 Cycles, -65C~150C VHBM2KV VMM200V 10ms, 1tr100mA www.anpec.com.tw APW7208 Customer Service Anpec Electronics Corp. Head Office : No.6, Dusing 1st Road, SBIP, Hsin-Chu, Taiwan, R.O.C. Tel : 886-3-5642000 Fax : 886-3-5642050 Taipei Branch : 2F, No. 11, Lane 218, Sec 2 Jhongsing Rd., Sindian City, Taipei County 23146, Taiwan Tel : 886-2-2910-3838 Fax : 886-2-2917-3838 Copyright ANPEC Electronics Corp. Rev. A.6 - Aug., 2011 16 www.anpec.com.tw