APW7236 1.5MHz Step-Up Converter for White LEDs Features General Description • Wide Input Voltage from 2.7V to 6V • Fixed 1.5MHz Switching Frequency The APW7236 is a current-mode and fixed frequency boost converter with an integrated N-FET to drive white • Reference Voltage : 0.2V • PWM Brightness Control with Wide Frequency LEDs. The series connection allows the LED current to be identical for uniform brightness. Its low on-resistance of NFET and low feedback voltage reduce power loss and achieve Range of 100Hz to 100kHz • Build-In Power MOSFET : 0.2Ω • Open-LED Protection • Under-Voltage Lockout Protection • Over-Temperature Protection • <1µA Quiescent Current during Shutdown • TSOT-23-6A and TDFN2x2-8 Package • Halogen and Lead Free Available high efficiency. Fast switching frequency(1.5MHz typical) allows using small-size inductor and both of input and output capacitors. An over voltage protection function, which monitors the output voltage via OVP pin, stops switching of the IC if the OVP voltage exceeds the over voltage threshold. An internal soft-start circuit eliminates the inrush current during start-up. The APW7236 also integrates under-voltage lockout, over- (RoHS Compliant) temperature protection, and current limit circuits to protect the IC in abnormal conditions. The APW7236 is available in a TSOT-23-6A and TDFN2x2-8 package. Applications • White LED Display Backlighting • Cell Phone and Smart Phone • PDA, PMP, MP3 • Digital Camera Pin Configuration TSOT-23-6A Top View LX 1 GND 2 FB 3 Simplified Application Circuit VIN ILED L1 VOUT TDFN2x2-8 (Top View) 4.7µH C1 4.7µF VIN LX C2 4.7µF GND VIN OVP EN 7~9 strings GND OFF ON EN 6 VIN 5 OVP 4 EN OVP FB 1 2 3 4 8 7 GND 6 5 LX NC FB GND R1 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.4 - Sep., 2012 1 www.anpec.com.tw APW7236 Ordering and Marking Information Over-Voltage Threshold Code A: 24V B: 16V Package Code CT : 6 Lead TSOT-23 QB: TDFN2x2-8 APW7236 Assembly Material Handling Code Operating Ambient Temperature Range I : -40 to 85oC Temperature Range Package Code Over-Voltage Threshold Code Handling Code TR : Tape & Reel Assembly Material G : Halogen and Lead Free Device APW7236CT: 36YX Y - Over-Voltage Threshold Code X - Date Code APW7236QB: 36Y X Y - Over-Voltage Threshold Code X - Date Code 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 Symbol VIN (Note 1) Parameter VIN Supply Voltage (VIN to GND) FB, EN to GND VLX LX to GND Voltage VOVP OVP to GND PD Power Dissipation TJ Maximum Junction Temperature TSTG Storage Temperature TSDR Maximum Lead Soldering Temperature, 10 Seconds Rating Unit -0.3 ~ 7 V -0.3 ~ VIN V -0.3 ~ 27.5 V -0.3 ~ 27.5 V Internally Limit W 150 o C -65 ~ 150 o C 260 o C Note1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability Thermal Characteristics Symbol θJA θJC Parameter Junction-to-Ambient Resistance in Free Air Typical Value Unit (Note 2) TSOT-23-6A TDFN2x2-6 220 165 o TSOT-23-6A TDFN2x2-6 120 20 o C/W Junction-to-Case Resistance C/W Note 2: θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 2 www.anpec.com.tw APW7236 Recommended Operating Conditions (Note 3) Symbol VIN Parameter Range Unit VIN Supply Voltage (VIN to GND) 2.7 ~ 6 V VOVP VOUT to GND VIN ~ 22 V CIN Input Capacitor 4.7~ µF Output Capacitor 4.7 ~ µF COUT L1 Converter Output Inductor 2.2 ~ 10 µH TA Ambient Temperature -40 ~ 85 o -40 ~ 125 o TJ Junction Temperature C C Note 3: Refer to the application circuit. Electrical Characteristics Refer to figure 1 in the “Typical Application Circuits”. These specifications apply over VIN = 3.6V, TA =25°C. Sym bol Pa rameter APW7236 Test Conditions Min. Typ. Max. Unit SUPPLY CURRENT VIN Input Voltage Range 2.5 - 6 VFB = 0.4V, no switching - 300 - µA VFB = GND, switching - 2 5 mA EN=GND - - 1 µA UVLO Threshold Voltage VIN Rising 2.0 2.2 2.4 V UVLO Hysteresis Voltage VIN Falling 50 100 150 mV VIN=2.7V~6V, TA = 25 C 0.185 0.2 0.215 V VIN=2.7V~6V, TA = -40 ~ 85 o C 0.18 - 0.22 V -50 - 50 nA 1.25 1.5 1.75 MHz IDD 1 IDD 2 Input DC Bias Current ISD V UNDER-VOLTAGE LOCKOUT REFERENCE AND OUTPUT VOLTAGE o VREF IFB Regulated Feedback Voltage APW7236A/B FB Input Current INTERNAL POWER SWITCH AND SCHOTTKY DIODE F SW Switching Frequency R ON Power Switch On Resistance - 0.2 - Ω ILIM Power Switch Current Limit - 2 - A -1 - 1 µA 92 95 98 % LX Leakage Curr ent D MAX VEN = 0V, V LX = 0V or 6V, VIN = 6V LX Maximum Duty Cycle Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 3 www.anpec.com.tw APW7236 Electrical Characteristics (Cont.) Refer to figure 1 in the “Typical Application Circuits”. These specifications apply over VIN = 3.6V, TA =25°C. Symbol Parameter APW7236 Test Conditions Unit Min. Typ. Max. APW7236A 22 24 27.5 V APW7236B OUTPUT OVER-VOLTAGE PROTECTION Over Voltage Threshold VOUT Rising 14.5 16 20 V Over Voltage Hysteresis VOVP Falling - 3 - V OVP Leakage VOVP =20V - 50 - µA Enable Voltage Threshold VEN Rising 1 - - V Shutdown Voltage Threshold VEN Falling - - 0.4 V EN Leakage Current VEN = 0 ~ 6V, VIN = 6V -2 - 2 µA EN Minimum On Pluse Width VEN = 0 ~ 6V, VIN = 6V, PWM Dimmimg Frequency=100Hz to 100kHz - 800 - ns TJ Rising - 150 - o (Note 4) Over-Temperature Protection Hysteresis (Note 4) TJ Falling - 40 - o ENABLE AND SHUTDOWN OVER-TEMPERATURE PROTECTION TOTP Over-Temperature Protection C C Note 4: Guaranteed by design, not production tested. Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 4 www.anpec.com.tw APW7236 Typical Operating Characteristics (Refer to the application circuit in the section "Typical Application Circuits", VIN=3.6V, TA=25oC, 6WLEDs unless otherwise specified ) EN Dimming Duty Cycle vs. WLED Current 100 250 80 200 L=10uH L=4.7uH 60 WLED Current (mA) Efficiency (%) Supply Voltage vs. Efficiency 40 20 150 100kHz 100 50kHz 50 20kHz 0 2.7 0 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 0 10 30 40 50 60 70 80 90 100 Supply Voltage vs. Maximum Duty Cycle Supply Voltage vs. WLED Current 210 100 Maximum Duty Cycle (%) WLED Current (mA) 20 EN Dimming Duty Cycle (%) Supply Voltage (V) 205 200 195 90 80 70 60 50 190 40 2.7 3.2 3.7 4.2 4.7 5.2 2 Supply Voltage (V) 2.5 3 3.5 4 4.5 5 5.5 6 Supply Voltage (V) Supply Voltage vs. Switch ON Resistance Switch ON Resistance (° ) 0.5 0.4 0.3 0.2 0.1 0 2 2.5 3 3.5 4 4.5 5 5.5 6 Supply Voltage (V) Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 5 www.anpec.com.tw APW7236 Operating Waveforms (Refer to the application circuit in the section "Typical Application Circuits", VIN=3.6V, TA=25oC, 6WLEDs unless otherwise specified ) EN Goes High- Enable EN Goes Low- Shutdown 1 1 2 2 3 3 4 4 CH1: VEN (2V/div) CH2: VOVP (5V/div) CH3: VLX (10V/div) CH4: IIN (500mA/div) Time: 1ms/div CH1: VEN (2V/div) CH2: VOVP (5V/div) CH3: VLX (10V/div) CH4: IIN (500mA/div) Time: 10ms/div Normal Operation OPEN-LED Protection 2 2 1 1 3 3 CH1: VOVP (2V/div) CH2: VLX (10V/div) CH3: IL (500mA/div) Time: 2µs/div CH1: VOVP (5V/div) CH2: VLX (10V/div) CH3: IL (500mA/div) Time: 10ms/div Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 6 www.anpec.com.tw APW7236 Pin Description PIN NO. FUNCTION NAME TDFN2x2-8 TSOT-23-6A 1, 5 2 GND Power and signal ground pin. 2 6 VIN Main Supply Pin. Must be closel y decoupled to GND with a 4.7µF or greater ceramic capacitor. 3 5 OVP Converter Output and Over-Voltage Protection Input Pin. 4 4 EN Enab le 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 1µA. Do not leave this pin floating. 6 3 FB Feedback Pin. Connect this pin to cathode of the lowest LED and current-sense resistor (R1). Calculate resistor value according to R1=VREF /I LED . 7 - NC No Internal Connection. 8 1 LX Switch pin. Connect this pin to inductor/diode here. Exposed Pad - GND Connecting this pad to GND. Block Diagram VIN OVP UVLO LX EN Control Logic Thermal Shutdown Σ Oscillator ICMP EAMP FB GND COMP VREF Soft-start Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 7 www.anpec.com.tw APW7236 Typical Application Circuit VIN ILED L1 VOUT 4.7µH C1 4.7µF VIN GND OFF ON C2 4.7µF LX up to 6 strings OVP FB EN R1 VIN ILED L1 VOUT 4.7µH C1 4.7µF VIN C2 4.7µF LX 7~13 strings GND OFF ON EN OVP FB R1 Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 8 www.anpec.com.tw APW7236 Function Description Main Control Loop Over-Temperature Protection (OTP) The APW7236 is a constant frequency current-mode switching regulator. During normal operation, the inter- The over-temperature circuit limits the junction temperature of the APW7236. When the junction temperature ex- nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and turned ceeds 150 oC, a thermal sensor turns off the power MOSFET, allowing the device to cool. The thermal sen- off when an internal comparator (ICMP) resets the latch. The peak inductor current at which ICMP resets the RS sor allows the converter to start a soft-start process and regulate the LEDs current again after the junction tem- latch is controlled by the voltage on the COMP node, which is the output of the error amplifier (EAMP). An external perature cools by 40oC. The OTP is designed with a 40oC hysteresis to lower the average Junction Temperature current-sense resistor connected between cathode of the lowest LED and ground allows the EAMP to receive a (TJ) during continuous thermal overload conditions, increasing the lifetime of the device. current feedback voltage VFB at FB pin. When the LEDs voltage decreases to cause the LEDs current to decrease, Enable/Shutdown Driving EN to ground places the APW7236 in shutdown it causes a slightly decrease in VFB relative to the reference voltage, which in turn causes the COMP voltage to increase until the LEDs current reaches the set point. mode. When in shutdown, the internal power MOSFET turns off, all internal circuitry shuts down and the quies- VIN Under-Voltage Lockout (UVLO) cent supply current reduces to 1µA maximum. This pin also could be used as a digital input allowing brightness The Under-Voltage Lockout (UVLO) circuit compares the input voltage at VIN with the UVLO threshold (2.2V rising, controlled by using a PWM signal with frequency from 100Hz to 100kHz. The 0% duty cycle of PWM signal corre- typical) to ensure the input voltage is high enough for reliable operation. The 100mV (typ) hysteresis prevents sponds to zero LEDs current and 100% corresponds to full one. Suggestion dimmimg duty range is from 8% to supply transients from causing a restart. Once the input voltage exceeds the UVLO rising threshold, startup begins. 100% at 100kHz dimmimg frequency. When the input voltage falls below the UVLO falling threshold, the controller turns off the converter. Open-LED Protection In driving LED applications, the feedback voltage on FB Soft-Start pin falls down if one of the LEDs, in series, is failed. Meanwhile, the converter unceasingly boosts the output The APW7236 has a built-in soft-start to control the N channel MOSFET current raises during start-up. During voltage like an open-loop operation. Therefore, an overvoltage protection monitoring the output voltage via OVP soft-start, an internal ramp voltage connected to one of the inverting inputs of the current limit comparator. The pin is integrated into the chip to prevent the LX and the output voltages from exceeding their maximum voltage inductor current limit is proportional to the voltage. When the threshold voltage of the internal soft-start comparator ratings. Once the voltage on the OVP pin rises above the OVP threshold, the converter stops switching and pre- is reached, the full current limit is released. vents the output voltage from rising. The converter can work again when the OVP voltage falls below the falling Current-Limit Protection The APW7236 monitors the inductor current, flowing through the N-channel MOSFET, and limits the current of OVP voltage threshold. peak at current-limit level to prevent loads and the device from damages in overload conditions. Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 9 www.anpec.com.tw APW7236 Application Information Input Capacitor Selection The peak inductor current is calculated as the following equation: The input capacitor (CIN) reduces the current peaks drawn from the input supply and reduces noise injection into the IPEAK = IIN(MAX ) + IC. The reflected ripple voltage will be smaller with larger CIN. For reliable operation, it is recommended to select VIN the capacitor voltage rating at least 1.2 times higher than the maximum input voltage. The capacitors should be IIN CIN placed close to the VIN and GND. 1 VIN ⋅ (VOUT − VIN ) ⋅ 2 VOUT ⋅ L ⋅ FSW IL LX N-FET IOUT D1 VOUT ESR ISW COUT Inductor Selection IL For high efficiencies, the inductor should have a low dc resistance to minimize conduction losses. Especially at ILIM high-switching frequencies the core material has a higher impact on efficiency. When using small chip inductors, IPEAK ∆IL the efficiency is reduced mainly due to higher inductor core losses. This needs to be considered when select- IIN ing the appropriate inductor. The inductor value determines the inductor ripple current. The larger the inductor ISW value, the smaller the inductor ripple current and the lower the conduction losses of the converter. Conversely, larger inductor values cause a slower load transient response. A reasonable starting point for setting ripple current, ∆IL, is 30% to 50% of the average inductor current. The rec- ID ommended inductor value can be calculated as below: V L ≥ IN VOUT where IOUT 2 VOUT − VIN η × × F ×I ∆IL SW OUT (MAX ) IL (AVG ) Output Capacitor Selection The current-mode control scheme of the APW7236 al- VIN = input voltage lows the usage of tiny ceramic capacitors. The higher capacitor value provides good load transient response. VOUT = output voltage FSW = switching frequency in MHz Ceramic capacitors with low ESR values have the lowest output voltage ripple and are recommended. If required, 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 η = Efficiency ∆IL /IL(AVG) = inductor ripple current/average current output capacitor. (0.3 to 0.5 typical) Δ VOUT = ΔVESR + ΔVCOUT To avoid saturation of the inductor, the inductor should be rated at least for the maximum input current of the con- ∆VESR ≈ IPEAK × RESR verter plus the inductor ripple current. The maximum input current is calculated as below: IIN(MAX ) = ∆VESR ≈ IPEAK × RESR IOUT (MAX ) × VOUT where IPEAK is the peak inductor current. VIN × η Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 10 www.anpec.com.tw APW7236 Application Information (Cont.) Output Capacitor Selection (Cont.) For ceramic capacitor application, the output voltage ripple is dominated by the ∆VCOUT. When choosing the input and output ceramic capacitors, the X5R or X7R with their good temperature and voltage characteristics are recommended. Setting the LED Current In figure 1, the converter regulates the voltage on FB pin, connected with the cathod of the lowest LED and the current-sense resistor R1, at 0.2V (typical). Therefore, the current (ILED), flowing via the LEDs and the R1, is calculated by the following equation: ILED = 0 .2 V R1 Layout Considerations 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. 1. The input capacitor should be placed close to the VIN and GND. Connecting the capacitor with VIN and GND pins by short and wide tracks without using any via holes for good filtering and minimizing the voltage ripple. 2. To minimize copper trace connections that can inject noise into the system, the inductor should be placed as close as possible to the LX pin to minimize the noise coupling into other circuits. 3. The feedback network should be routed away from the inductor. The feedback pin and feedback network should be shielded with a ground plane or trace to minimize noise coupling into this circuit. 4. A star ground connection or ground plane minimizes ground shifts and noise is recommended. Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 11 www.anpec.com.tw APW7236 Package Information TDFN2x2-8 A b E D A1 D2 A3 L E2 Pin 1 Cornar e S Y M B O L TDFN2x2-8 MILLIMETERS INCHES MIN. MAX. MIN. MAX. A 0.70 0.80 0.028 0.031 A1 0.00 0.05 0.000 0.002 0.012 A3 0.20 REF 0.008 REF b 0.18 0.30 0.007 D 1.90 2.10 0.075 0.083 D2 1.00 1.60 0.039 0.063 E 1.90 2.10 0.075 0.083 E2 0.60 1.00 0.024 0.039 e L 0.50 BSC 0.30 0.020 BSC 0.012 0.45 0.018 Note : 1. Followed from JEDEC MO-229 WCCD-3. Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 12 www.anpec.com.tw APW7236 Package Information TSOT-23-6A D e E E1 SEE VIEW A b c 0.25 A GAUGE PLANE SEATING PLANE L A1 A2 e1 VIEW A S Y M B O L TSOT-23-6A MILLIMETERS INCHES MIN. MAX. MIN. MAX. A 0.70 1.00 0.028 0.039 A1 0.01 0.10 0.000 0.004 A2 0.70 0.90 0.028 0.035 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 0.118 0.071 E 2.60 3.00 0.102 E1 1.40 1.80 0.055 e 0.95 BSC e1 1.90 BSC L 0 0.037 BSC 0.075 BSC 0.30 0.60 0° 8° 0.012 0.024 0° 8° Note : 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.4 - Sep., 2012 13 www.anpec.com.tw APW7236 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 TDFN2x2-8 Application TSOT-23-6A A H T1 C d D W E1 F 178.0±2.00 50 MIN. 8.4+2.00 -0.00 13.0+0.50 -0.20 1.5 MIN. 20.2 MIN. 8.0±0.20 1.75±0.10 3.50±0.05 P0 P1 P2 D0 D1 T A0 B0 K0 1.5 MIN. 0.6+0.00 -0.4 3.35 MIN 3.35 MIN 1.30±0.20 4.0±0.10 4.0±0.10 2.0±0.05 1.5+0.10 -0.00 A H T1 C d D W E1 F 178.0±2.00 50 MIN. 8.4+2.00 -0.00 13.0+0.50 -0.20 1.5 MIN. 20.2 MIN. 8.0±0.30 1.75±0.10 3.5±0.05 P0 P1 P2 D0 D1 T A0 B0 K0 4.0±0.10 4.0±0.10 2.0±0.05 1.5+0.10 -0.00 1.0 MIN. 0.6+0.00 -0.40 3.20±0.20 3.10±0.20 1.50±0.20 (mm) Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 14 www.anpec.com.tw APW7236 Devices Per Unit Package Type Unit Quantity TDFN2x2-8 Tape & Reel 3000 TSOT-23-6A Tape & Reel 3000 Taping Direction Information TDFN2x2-8 USER DIRECTION OF FEED TSOT-23-6A USER DIRECTION OF FEED AAAX AAAX Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 AAAX AAAX 15 AAAX AAAX AAAX www.anpec.com.tw APW7236 Classification Profile 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. 3°C/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 5°C 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 25°C 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. Copyright ANPEC Electronics Corp. Rev. A.4 - Sep., 2012 16 www.anpec.com.tw APW7236 Classification Reflow Profiles 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 Description 5 Sec, 245°C 1000 Hrs, Bias @ 125°C 168 Hrs, 100%RH, 2atm, 121°C 500 Cycles, -65°C~150°C VHBM≧2KV VMM≧200V 10ms, 1tr≧100mA 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.4 - Sep., 2012 17 www.anpec.com.tw