APW7008QAI-TRG

APW7008 1X/1.5X/2x Charge Pump White LED Driver Features • • • • • • • • • • • • • • ±1.5% LED Current Matching High Efficiency Up to 90% Over Li-ion Battery Discharge Output Current Up to 30mA per LED 2.7V to 5.5V Operating Voltage Allow to Turn On or Off a Combination of LEDs 1x/1.5x/2x Charge Pump Modes Low Shutdown Current: 2 µA Maximum Low Input Ripple and EMI Internal Soft-Start Limits Inrush Current Short Circuit Current-Limit Thermal Shutdown Protection Output Over-Voltage Protection 3mmx3mm 16-pin QFN (QFN3X3-16) Package Lead Free and Green Devices Available (RoHS Compliant) General Description The APW7008 is a high efficiency charge pump white LED driver; the device drives up four white LEDs with regulated constant current for uniform intensity. The supply voltage ranges from 2.7V to 5.5V and it is optimized for a Li-ion battery application. The APW7008 operates in 1x, 1.5x, and 2x charge pump modes and automatically switches the charge pump modes depend on the input voltage to maintain the required power for high power efficiency. The APW7008 provides up to 30mA per LED for a total of 120mA and allows several methods, such as a PWM signal on the CTRL0 pin for LED dimming. Three control logic pins allow to disable or enable a combination of LEDs. The supply current is only 2mA in 2x mode, and the EN pin allows the device to enter shutdown mode with 2µA quiescent current. The APW7008 switches at 1MHz frequency and only requires four 1µF ceramic capacitors and one resistor, and ensures low input current ripple and EMI. The APW7008 is available in a 16-pin QFN package. Pin Configuration ILED1 ILED2 ILED3 ILED4 12 GND Metal GND Pad (Bottom) 11 C110 C1+ 9 5 ISET 6 V O UT 7 VIN 8 C2 + C2- Applications • • • • Cellular Phone White LED Back Light Portable Device PDA and Handheld Computer DSC EN CTRL0 CTRL1 CTRL2 1 2 3 4 16 15 14 13 APW7008 QFN3x3-16 Top View 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.3 - Feb., 2009 1 www.anpec.com.tw APW7008 Ordering and Marking Information APW7008 Assembly Material Handling Code Temperature Range Package Code APW 7008 XXXXX Package Code QA : QFN3x3-16 Operating Ambient Temperature Range I : -40 to 85 oC Handling Code TR : Tape & Reel Assembly Material G : Halogen and Lead Free Device XXXXX - Date Code APW7008 QA : 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-STD020C 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 VOUT VIN VOUT to GND VIN to GND (Note 1, 2) Rating -0.3 to +6 -0.3 to +6 -0.3 to +6 -0.3 to +6 -0.3 to +6 -0.3 to 2 +150 -65 ~ 150 260 Unit V V V V V V °C °C °C Parameter VC1+, VC1-, VC2+, VC2- C1+, C1-, C2+, C2- to GND VILED1-4 VCTRL0/1/2, VEN VISET TJ TSTG TSDR ILED1-4 to GND CTRL0/1/2, EN to GND ISET to GND Maximum Junction Temperature Storage Temperature Maximum Lead Soldering Temperature, 10 Seconds Note 1: Stresses beyond the absolute maximum rating may damage the device and operating in the absolute maximum rating conditions for extended periods may affect device reliability. Note 2: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(max) = (TJ – TA) / θJA ;TJ=125°C. Exceeding the maximum allowable power dissipation will result in excessive die temperature. Thermal Characteristics Symbol R θJA Parameter Thermal Resistance − Junction to Ambient QFN3x3-16 Typical Value 40 Unit °C/W C opyright © A NPEC Electronics Corp. Rev. A.3 - Feb., 2009 2 www.anpec.com.tw APW7008 Recommended Operating Conditions Symbol VIN VOUT ILED Input Voltage Output Voltage LED Current Output Current, VIN>3.5V, VF=3.1V, 1x Mode IOUT Output Current, 3.5V3.1V, VF=3.1V, 1.5x Mode Output Current, 3.1V2.8V, VF=3.1V, 2x Mode TA Ambient Temperature Parameter Rating 2.8 to 4.5 3 to 4 5 to 30 180 120 90 -40 to 85 °C mA Unit V V mA Electrical Characteristics VIN = 2.85 to 5.5V, CIN = COUT = C1 = C2 = 1µF (ESR = 0.03Ω), ILED = 20mA, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. APW7008 Symbol VIN VUVLO Parameter Input Voltage Under-Voltage Lockout Threshold Under-Voltage Lockout Hysteresis in 1.5x/2x mode IQ Quiescent Current No switching in 1x mode EN=0 ILED-ERR LED Current Accuracy Current Matching IISET ISET Current ISET to LED Current Ratio VILED-TH ILED Threshold Voltage 1.5x mode to 1x mode Transition Hysteresis 2x mode to 1.5x mode Transition Hysteresis FOSC Switching Frequency 1x mode (VIN-VOUT) / IOUT ROUT Open Loop VOUT Resistance 1.5x mode (1.5xVIN-VOUT) / IOUT 2x mode (2xVIN-VOUT) / IOUT ISHORT VOVP VIH Short Circuit Current-Limit OVP Threshold Logic Pins High Threshold VOUT < 1V IILED / (1.2V / REST) 5mA