DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 8
Technical content
AiT Semiconductor Inc. www.ait-ic.com A8501 OLED DRIVER PWM CONTROL STEP-UP DC-DC CONVERTER REV2.5 - OCT 2011 RELEASED, APR 2018 UPDATED - - 1 - DESCRIPTION FEATURES The A8501 Series is a fixed frequency, constant current step- up DC/DC converter ideal for driving OLED. Output voltage of up to 22V can be derived, and from a li -ion battery supply, the output voltage can be 12V drive OLED. A 2Ω resistance of NMOS is integrated in the circuit , withstand voltage can support 22V, with a small SOT -25 package saves PCB space and BOM cost. The A8501 is available in SOT-25 package.
ORDERING INFORMATION
SPQ: 3,000pcs / Reel A8501E5R A8501E5VR Note V: Halogen free Package R: Tape & Reel AiT provides all RoHS products Input voltage range 2.7V~5.5V Output voltage range up to 22V Oscillation frequency 1MHz±20% Efficiency 88% Control PWM control Stand-by Current ISTB=1.0uA(MAX) Load capacitor 10uF,ceramic LX limit Current 600mA Available in SOT-25 Package APPLICATION Mobil phones, PHS PDAs Digital still cameras TYPICAL APPLICATION FB OUT V V = R2 R2R1+ Note: R1 and R2 can be adjusted by the voltage of V OUT and FB Pin; ( when V OUT is equal to 12V, recommended resistor R1 =875k , R2 =100k , CP=100pF)
AiT Semiconductor Inc. www.ait-ic.com A8501 OLED DRIVER PWM CONTROL STEP-UP DC-DC CONVERTER REV2.5 - OCT 2011 RELEASED, APR 2018 UPDATED - - 2 - PIN DESCRIPTION Top View Pin # Symbol Function
1 LX Switch
2 VSS Ground
3 FB Voltage Feedback
4 CE Chip Enable, “High” Active.
5 VIN Power Input
AiT Semiconductor Inc. www.ait-ic.com A8501 OLED DRIVER PWM CONTROL STEP-UP DC-DC CONVERTER REV2.5 - OCT 2011 RELEASED, APR 2018 UPDATED - - 3 - ABSOLUTE MAXIMUM RATINGS VIN, VIN Pin Voltage VSS-0.3V～VSS+7V VLX, LX Pin Voltage VSS-0.3V～VSS+22V VFB, FB Pin Voltage VSS-0.3V～VSS+7V VCE, CE Pin Voltage VSS-0.3V～VSS+7V ILX, LX Pin Current 600mA PD, Power Dissipation 250mW TOPR, Operating Temperature range -40°C～＋85°C TSTG, Storage Temperature range -55°C～＋125°C Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
AiT Semiconductor Inc. www.ait-ic.com A8501 OLED DRIVER PWM CONTROL STEP-UP DC-DC CONVERTER REV2.5 - OCT 2011 RELEASED, APR 2018 UPDATED - - 4 -
ELECTRICAL CHARACTERISTICS
TA=25℃, unless otherwise noted Parameter Symbol Conditions Min. Typ. Max. Unit Circuits FB Control Voltage VFB 1.205 1.23 1.255 V 1 Output Voltage Range VOUT VIN 22 V Lx Operating Voltage Range VLX 22 V Operating Voltage Range V IN 2.5 6 V Stand-by Current ISTB VCE=0V, VLX=5V 1 μA 3 Supply Current 1 IDD1 500 1200 1500 μA 2 Supply Current 2 IDD2 VIN=VLX,VFB=2V 90 μA 3 Oscillation Frequency fOSC 0.8 1.0 1.2 MHz 2 Maximum Duty Cycle MAXDTY VCONT=0.4V 75 % 2 Efficiency EFFI VIN=3.6V;RLED=20Ω 88 % 1 Current Limit ILIM VIN=3.6V 600 mA 4 LX On Resistance VIN=3.6V, VLX=0.4V 2.0 Ω 2 LX Leak Current ILXL 0 1 uA 3 CE ‘H’ Voltage VCEH 1.1 V 2 CE ‘L’ Voltage VCEL 0.6 V 2 CE ‘H’ Current ICEH VIN=VLX, VFB=0.4V 0.1 uA 3 CE ‘L’ Current ICEL VCE=0V, VLX=5V -0.1 uA 3 FB ’H’ Current IFBH VIN=VLX, VFB=0.4V 0.1 uA 3 FB ’L’ Current IFBL VCE=0V, VLX=5V -0.1 uA 3
AiT Semiconductor Inc. www.ait-ic.com A8501 OLED DRIVER PWM CONTROL STEP-UP DC-DC CONVERTER REV2.5 - OCT 2011 RELEASED, APR 2018 UPDATED - - 5 - TYPICAL PERFORMANCE CHARACTERISTICS 1. Efficiency vs. Output Current 2. Output Voltage vs. Temperature TEST CIRCUIT 1. 2. 3. 4.
AiT Semiconductor Inc. www.ait-ic.com A8501 OLED DRIVER PWM CONTROL STEP-UP DC-DC CONVERTER REV2.5 - OCT 2011 RELEASED, APR 2018 UPDATED - - 6 - BLOCK DIAGRAM
AiT Semiconductor Inc. www.ait-ic.com A8501 OLED DRIVER PWM CONTROL STEP-UP DC-DC CONVERTER REV2.5 - OCT 2011 RELEASED, APR 2018 UPDATED - - 7 -
PACKAGE INFORMATION
Dimension in SOT-25 (Unit: mm) Symbol Millimeters Inches Min Max Min Max A 1.050 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.500 0.012 0.020 c 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E 1.500 1.700 0.059 0.067 E1 2.650 2.950 0.104 0.116 e 0.950(BSC) 0.037(BSC) e1 1.800 2.000 0.071 0.079 L 0.300 0.600 0.012 0.024 θ 0° 8° 0° 8°
AiT Semiconductor Inc. www.ait-ic.com A8501 OLED DRIVER PWM CONTROL STEP-UP DC-DC CONVERTER REV2.5 - OCT 2011 RELEASED, APR 2018 UPDATED - - 8 - IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to discontinue any integrated cir cuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. AiT Semiconductor Inc. 's integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of death, personal injury, or server property, or environmental damage. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc . assumes to no liability to customer product design or application support. AiT warrants the performance of its products of the specifications applicable at the time of sale.