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Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER General Description Features The AP3615 is a step-up DC-DC converter based on 1x/1.5x charge pump and low dropout current sink, which helps it maintain the highest efficiency. The AP3615 is specially designed to drive up to 5 WLEDs in backlight display. • • • • • • • • • • • The AP3615 provides up to 20mA current for each WLED. There are totally 16 steps of current control, which is achieved through a digital pulse dimming function on EN pin. Additionally, 1MHz high switching frequency enables the use of small external capacitors. Internal soft-start circuitry prevents excessive inrush current during start-up and mode transition. AP3615 Regulated Output Current with ±3% Matching Drives up to 5 WLEDs at 20mA Each 16 Steps Brightness Control Using Pulse Signal Dimming Wide Operating Voltage Range: 2.8V to 5.5V High Operating Frequency: 1MHz Auto 1x/1.5x Charge Pump Mode Selection Built-in Soft-start Output Over Voltage Protection Built-in UVLO Built-in OTSD Operating Temperature Range: -40°C to 85°C Applications The supply voltage of AP3615 ranges from 2.8V to 5.5V which make it ideally suit for applications powered by Li-ion battery. • • • The AP3615 is available in the tiny package of QFN-3×3-16. Mobile Phone PDA MP3/4 QFN-3×3-16 Figure 1. Package Type of AP3615 Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 1 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Pin Configuration VOUT2 D1 16 NC Pin 1 Mark VOUT1 FN Package (QFN-3×3-16) 15 14 13 C1- 1 12 D2 C2- 2 11 D3 C2+ 3 10 D4 C1+ 4 9 D5 5 6 7 8 AGND PGND VIN EN EP Exposed PAD, Connected to AGND Note: Pin 14 should be connected with Pin 16 on PCB Board. Figure 2. Pin Configuration of AP3615 (Top View) Pin Description Pin Number Pin Name Function 1 C1- Flying capacitor 1 negative terminal. The flying capacitor should be connected as close to this pin as possible 2 C2- Flying capacitor 2 negative terminal. The flying capacitor should be connected as close to this pin as possible 3 C2+ Flying capacitor 2 positive terminal. The flying capacitor should be connected as close to this pin as possible 4 C1+ Flying capacitor 1 positive terminal. The flying capacitor should be connected as close to this pin as possible 5 AGND Analog ground 6 PGND Power ground 7 VIN Supply voltage input 8 EN Enable control input. Logic high enables the IC; while logic low forces the IC into shutdown mode. It is used for digital dimming by applying a pulse signal on it. 9, 10, 11, 12, 13 D5 ~ D1 Current sink for WLED5, 4, 3, 2, 1. Connect the cathode of WLEDs to these pins. If not used, these pins must be connected with VIN 14 VOUT2 Output pin 2. It powers 5 channels current sink 15 NC 16 Jan. 2013 VOUT1 No connection Output Pin 1. It’s the charge pump output. The output capacitor should be placed closely to this pin Rev. 1. 3 BCD Semiconductor Manufacturing Limited 2 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Functional Block Diagram VIN C1- C1+ 1 4 7 EN C2+ 2 3 16 1x /1.5x Charge Pump AGND 6 PGND 14 VOUT2 OVP Soft Start Shutdown Delay UVLO 16 Steps Pulse Dimming Controller VOUT1 5 Current Limitation 1MHz OSC 8 C2- OTSD 5 Channels Current Sink 13 12 11 10 9 D1 D2 D3 D4 D5 Figure 3. Functional Block Diagram of AP3615 Ordering Information AP3615 - Circuit Type G1: Green TR: Tape and Reel Package FN: QFN-3×3-16 Package Temperature Range QFN-3×3-16 -40 to 85°C Part Number AP3615FNTR-G1 Marking ID B2B Packing Type Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 3 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Absolute Maximum Ratings (Note 1) Parameter Input Voltage VOUT Pin Voltage (VOUT1 & VOUT2) EN Pin Voltage C1+, C2+ Pin Voltage C1-, C2- Pin Voltage D1, D2, D3, D4 and D5 Pin Voltage Thermal Resistance (Junction to Ambient, No Heat Sink, Free Air) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10sec) Symbol Value Unit VIN VOUT VEN VC+ VCVD -0.3 to 6 -6 to 0.3 -0.3 to 6 -0.3 to 6 -6 to 0.3 VOUT to VIN V V V V V V θJA 60 ºC/W TJ TSTG TLEAD 150 -65 to 150 260 ºC ºC ºC Note 1: Stresses greater than 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 Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Input Voltage VIN 2.8 5.5 V Operating Ambient Temperature TA -40 85 ºC Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 4 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Electrical Characteristics VIN=3.6V, VEN=VIN, TA=25ºC, CIN=C1=C2=COUT=1μF, VF(forward voltage)=3.2V, unless otherwise noted. Parameter Symbol Conditions Min Typ Max Unit 5.5 V Input Section Input Voltage VIN Under Voltage Lockout Threshold ID=0mA to 100mA 2.8 VIN Falling Under Voltage Lockout Hysteresis Supply Current Shutdown Supply Current ICC No Load ISHDN VEN=GND fOSC VIN=3.0V, 1.5x Mode 2.2 V 250 mV 1.7 3 mA 3 10 μA 1 1.3 MHz 3.5 3.6 V 3.7 3.8 V 20 21.5 mA Charge Pump Section Switch Frequency 1x Mode to 1.5x Mode Transition Voltage (VIN Falling) 1.5x Mode to 1x Mode Transition Voltage (VIN Rising) V1.5X V1X 0.7 VD=3.2V, ID1=ID2=ID3=ID4=ID5=20mA VD=3.2V, ID1=ID2=ID3=ID4=ID5=20mA Current Source Section WLED Current ID 100% Setting, 3.0V≤VIN≤5.0V TA=-40ºC to 85ºC 18.5 Current Matching Between any Two Outputs ID-Match1 VD1=VD2=VD3=VD4=VD5=3.2V -3 3 % Current Matching Between any Two Outputs ID-Match2 VD1=VD2=VD3=VD4=VD5=3.0V to 4.0V VIN=3.2V to 5.0V -3.5 3.5 % Enable Section EN High Level Threshold Voltage VIH EN Low Level Threshold Voltage VIL EN Input Current IEN 1.5 VEN= 0V to 5V V 1 EN Low to Shutdown Delay tSHDN 1 EN Low Time for Dimming tLO 0.1 EN High Time for Dimming tHI 0.1 0.5 V 10 μA ms 0.3 ms ms Total Device Soft-start Time tSS Inrush Current IINRUSH ID=100mA Total 200 μs VIN=3.2V, ID=100mA Total 320 mA Note 2 5.5 V Over Voltage Protection VOVP Thermal Shutdown TOTSD 160 ºC Thermal Shutdown Hysteresis THYS 20 ºC Thermal Resistance (Junction to Case) θJC 15 ºC/W QFN-3×3-16 Note 2: Open circuit at any WLED that is programmed to be in the on state. Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 5 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Typical Performance Characteristics 4.0 22 3.5 21 WLED Current (mA) Shutdown Supply Current (μA) TA=25ºC, CIN=C1=C2=COUT=1μF, VF=3.2V, unless otherwise noted. 3.0 2.5 2.0 20 19 ID1 ID2 18 ID3 o 1.0 -40 TA=25 C VIN=3.2V 1.5 17 Shut Down -20 0 20 40 60 80 100 120 16 2.8 140 ID4 VIN Falling 3.2 ID5 3.6 4.0 4.4 4.8 5.2 5.6 Temperature ( C) Input Voltage (V) Figure 4. Shutdown Supply Current vs. Temperature Figure 5. WLED Current vs. Input Voltage 2.2 4.4 2.0 4.0 Quiescent Current (mA) Quiescent Current (mA) O 1.8 1.6 o TA=25 C 1.4 VIN=5V No Load 1x Mode 1.2 1.0 -40 -20 0 20 40 60 80 100 120 3.2 o TA=25 C 2.8 VIN=3.2V No Load 1.5x Mode 2.4 2.0 -40 140 O Temperature ( C) -20 0 20 40 60 80 100 120 140 O Temperature ( C) Figure 7. 1.5x Mode Quiescent Current vs. Temperature Figure 6. 1x Mode Quiescent Current vs. Temperature Jan. 2013 3.6 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 6 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Typical Performance Characteristics (Continued) TA=25ºC, CIN=C1=C2=COUT=1μF, VF=3.2V, unless otherwise noted. 22 22 o o TA=25 C TA=25 C 21 VIN=5V WLED Current (mA) WLED Current (mA) 21 20 19 ID1 ID2 18 VIN =3.6V 20 19 ID1 ID2 18 ID3 ID3 ID4 17 ID4 17 ID5 ID5 16 -40 -20 0 20 40 60 80 100 120 16 -40 140 -20 0 20 40 60 80 100 120 140 O Temperature ( C) O Temperature ( C) Figure 8. 1x Mode WLED Current vs. Temperature Figure 9. 1.5x Mode WLED Current vs. Temperature 100 1.4 90 1.2 Frequency (MHz) Efficiency (%) 80 70 60 50 40 VIN from High to Low VIN=3.6V 0.6 ID1=ID2=ID3=ID4=ID5=20mA 20 3.2 3.6 4.0 4.4 4.8 5.2 ID1=ID2=ID3=ID4=ID5=20mA 0.4 -40 5.6 -20 0 20 40 60 80 100 120 140 o Input Voltage (V) Temperature ( C) Figure 10. Efficiency vs. Input Voltage Jan. 2013 0.8 o TA=25 C 30 10 2.8 1.0 Figure 11. Frequency vs. Temperature Rev. 1. 3 BCD Semiconductor Manufacturing Limited 7 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Typical Performance Characteristics (Continued) TA=25ºC, CIN=C1=C2=COUT=1μF, VF=3.2V, unless otherwise noted. 2.6 UVLO Threshold Voltage (V) 2.2 Quiescent Current (mA) 2.0 1.8 1.6 1.4 o TA=25 C No Load VIN Rising 1.2 1.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Power Falling Power Rising 2.5 2.4 2.3 2.2 2.1 o TA=25 C 2.0 1.9 -40 5.5 No Load -20 0 20 40 60 80 100 120 140 o Temperature ( C) Input Voltage (V) Figure 12. 1x Mode Quiescent Current vs. Input Voltage Figure 13. UVLO Threshold Voltage vs. Temperature VC1+ 2V/div VC1+ 2V/div VOUT 1V/div VOUT 1V/div VEN 2V/div VEN 2V/div IIN 0.2A/div IIN 0.2A/div Time (100μs/div) Time (400μs/div) Figure 14. 1x Mode Turn on Characteristic Jan. 2013 Figure 15. 1x Mode Turn off Characteristic Rev. 1. 3 BCD Semiconductor Manufacturing Limited 8 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Typical Performance Characteristics (Continued) TA=25ºC, CIN=C1=C2=COUT=1μF, VF=3.2V, unless otherwise noted. VC1+ 2V/div VC1+ 2V/div VOUT 1V/div VOUT 1V/div VEN 2V/div VEN 2V/div IIN 0.2A/div IIN 0.2A/div Time (400μs/div) Time (100μs/div) Figure 16. 1.5x Mode Turn on Characteristic Figure 17. 1.5x Mode Turn off Characteristic VIN 20mV/div IIN 20mA/div VOUT 50mV/div VC1+ 2V/div VEN 2V/div IWLED 5mA/div Time (400ns/div) Time (2ms/div) Figure 18. 1x Mode Dimming Operation (VIN=5V, fEN=2kHz) Jan. 2013 Figure 19. Output Ripple (VIN=3.3V, ID=100mA) Rev. 1. 3 BCD Semiconductor Manufacturing Limited 9 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Digital Dimming Operating Diagram Figure 20. Digital Dimming Operating Diagram of AP3615 Note 3: The dimming control can be achieved by applying a pulse to the EN pin. When the low level duration time of pulse is between TLOmin and TLOmax, and the high level duration time is larger than THImin, the LED current will decrease 1/16. If the low level duration time is larger than TSHDNmax, the IC will be turned off. When AP3615 is powered on, the WLED is in full brightness. And it will keep maximum current until the pulse is detected. After 15 pulses the WLED current decreases to 1/16 of full brightness. It will increase to full brightness if a pulse is added to EN pin then. Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 10 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Typical Application 4 WLEDs 5 WLEDs Figure 21. Typical Applications of AP3615 Detailed application information, please refer to AP3615 application note. Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 11 www.BDTIC.com/DIODES Data Sheet 5 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER AP3615 Mechanical Dimensions QFN-3×3-16 Jan. 2013 Rev. 1. 3 Unit: mm(inch) BCD Semiconductor Manufacturing Limited 12 www.BDTIC.com/DIODES BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT IMPORTANT NOTICE NOTICE BCD Semiconductor Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifiBCD cations herein. herein. BCD BCD Semiconductor Semiconductor Manufacturing Manufacturing Limited Limited does does not not assume assume any any responsibility responsibility for for use use of of any any its its products products for for any any cations particular purpose, nor nor does does BCD BCD Semiconductor particular purpose, Semiconductor Manufacturing Manufacturing Limited Limited assume assume any any liability liability arising arising out out of of the the application application or or use use of circuits. BCD of any any its its products products or or circuits. BCD Semiconductor Semiconductor Manufacturing Manufacturing Limited Limited does does not not convey convey any any license license under under its its patent patent rights rights or or other rights of of others. others. other rights rights nor nor the the rights MAIN SITE MAIN SITE - Headquarters BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab No. 1600, Zi Xing Road, Shanghai ZiZhu Science-basedLimited Industrial Park, 200241, China Shanghai SIM-BCD Semiconductor Manufacturing Tel: Fax: +86-21-24162277 800,+86-21-24162266, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 REGIONAL SALES OFFICE Shenzhen OfficeSALES OFFICE REGIONAL - Wafer FabSemiconductor Manufacturing Limited BCD Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. - IC Design Group 800 Yi Shan Road, Shanghai 200233, China Corporation Advanced Analog Circuits (Shanghai) Tel: +86-21-6485 1491,YiFax: 0008200233, China 8F, Zone B, 900, Shan+86-21-5450 Road, Shanghai Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 Taiwan Office Shanghai Semiconductor Manufacturing Co., Ltd., Shenzhen Office BCD Taiwan Semiconductor Shenzhen SIM-BCD Office Office (Taiwan) Company Limited Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan Shenzhen, 4F, 298-1, Guang Road,(Taiwan) Nei-Hu District, Taipei, Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.District, Shenzhen Office BCDRui Semiconductor Company Limited China Taiwan Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Tel: +86-755-8826 Tel: +886-2-2656 2808 Room E, 5F, Noble 7951 Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Taiwan Fax: +86-755-88267951 7865 Fax: +886-2-2656 28062808 Tel: +86-755-8826 Tel: +886-2-2656 Fax: +86-755-8826 7865 Fax: +886-2-2656 2806 USA Office BCD Office Semiconductor Corp. USA 30920Semiconductor Huntwood Ave.Corporation Hayward, BCD CA 94544, USA Ave. Hayward, 30920 Huntwood Tel :94544, +1-510-324-2988 CA U.S.A Fax:: +1-510-324-2988 +1-510-324-2788 Tel Fax: +1-510-324-2788 www.BDTIC.com/DIODES