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Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
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Technical content
Features
Fast 1.2MHz Switching Frequency High Efficiency：85% Typical The minimum input voltage 2.5 V Drives 7 Series 2 Parallel LED’s with 5V V IN Drives 3 Series 5 Parallel LED’s with 5V V IN Requires Only 0.47uF Output Capacitor Inherently Matched LED Current Over-voltage protection and UVLO function Uses Very Small Inductors SOT23-6 Package
Applications
LED series and parallel applications LED Display Panels Backlighting. Block Diagram
Description
The PA5110 is a white LED constant current driver used for backlighting of digital photo frames or 3 to 5-inch LED screens. It is a step-up DC/DC converter specifically designed to drive white LED’s at a constant current. It can drive up to fifteen LED’s. It switches at 1.2MHz and uses minimal external components which provide cost and real estate saving over alternate solutions. The output capacitor can be as low as 0.47uF, Feedback voltage is 95mV. Pin Configurations Symbo l Description Symbo l SW Switching Output VCC Power Supply In GND Ground OVP Over Voltage Protection FB Feedback CE Start-Up
Ordering Information
Temperature Range Package Part Number -40 to 85°C SOT23-6L PA5110-6L 95225 3 4 SW GND FB VCC CE OVP SOT23-6L PWM CONTROL VREF SHUTDOWN FOSC gm Slope Comp Current Sense Pin6 VCC Pin 4 CE Pin3 FB Pin2 GND Pin1 SW Pin5 OVP
561 E Elliott Rd, Suite 175, Chandler, Arizona Tel. (480) 539-2900 Fax. (480) 632-1715 www.protekanalog.com PA5110 Constant Current LED Driver.
95225 Rev0 04/09
NOT FOR USE IN LIFE SUPPORT SYSTEMS Absolute maximum ratings Parameter Symbol Value Unit Supply Voltage VIN 20 V Feedback Voltage FB 10 V Switch Voltage SW 32 V CE Voltage VCE 20 V Operating temperature range Topr -25 to +70 °C Storage temperature range Rstg -65 to +150 °C Junction temperature Tj 125 °C
Electrical Characteristics
Tamb = 25°C, VIN=5V，VCE=5V, unless otherwise specified. Parameter Test Conditions / Pins Min Type Max Unit Minimum Operating Voltage 4.5 V Maximum Operating Voltage 20 V Feedback Voltage ISW=100mA, Duty Cycle=66% 104 mV FB Pin Bias Current 50 100 200 nA Supply Current V CE=0V 1.9 0.1 2.5 mA µA Switching Frequency 0.8 1.2 1.6 MHz Maximum Duty Cycle 85 90 % Switch Current Limit 320 mA Switch VCESAT I SW =250mA 350 mV Switch Leakage Current VSW=5V 0.01 5 uA CE Voltage High 1.5 V CE Voltage Low 0.4 V CE Pin Bias Current 65 µA OVP Protection 27 30 33 V
561 E Elliott Rd, Suite 175, Chandler, Arizona Tel. (480) 539-2900 Fax. (480) 632-1715 www.protekanalog.com PA5110 Constant Current LED Driver. NOT FOR USE IN LIFE SUPPORT SYSTEMS Typical Applications
7 Series 2 Parallel SOT23-6L
3 Series 5 Parallel SOT23-6L
1µF 22µ 0.47µF D1 D1 D7 D7 VCC SW GN FB CE 6.2Ω 6.2Ω OVP VCC 1µF 22µ 0.47µF D1 D1 VCC SW GN FB CE 6.2Ω 6.2Ω D2 D2 D2 D2 D2 D1 D1 D1 D3 D3 D3 D3 6.2Ω 6.2Ω 6.2Ω OVP
561 E Elliott Rd, Suite 175, Chandler, Arizona Tel. (480) 539-2900 Fax. (480) 632-1715 www.protekanalog.com PA5110 Constant Current LED Driver. NOT FOR USE IN LIFE SUPPORT SYSTEMS Analog Voltage Backlight Control Logic Voltage Backlight Control VCC 1µF 0.47µF D1 D1 D7 D7 VCC SW GN FB CE 6.2Ω 6.2Ω 90K VDC 22µ VCC 1µF 0.47µF D1 D1 D7 D7 VCC SW GN FB CE 6.2Ω 6.2Ω 22µ PWM
561 E Elliott Rd, Suite 175, Chandler, Arizona Tel. (480) 539-2900 Fax. (480) 632-1715 www.protekanalog.com PA5110 Constant Current LED Driver. NOT FOR USE IN LIFE SUPPORT SYSTEMS Waveforms V IN (V) IQ(mA) IQ vs Temperature -50 Switch Frequency vs -25 0. 25 50 75 10 Switch Frequency (MHz) Temp (°C) η vs Temperature η (%) 84. 84. 83. 83. 82. 82. 81. 81. 80. 80. -25 0. 25 50 75 10 ILED = ILED = ILED = ILED = (mA)
561 E Elliott Rd, Suite 175, Chandler, Arizona Tel. (480) 539-2900 Fax. (480) 632-1715 www.protekanalog.com PA5110 Constant Current LED Driver. NOT FOR USE IN LIFE SUPPORT SYSTEMS Drive 7 Series 2 Parallel LED’s 90.00% 88.00% 86.00% 84.00% 82.00% 80.00% 78.00% 76.00% 74.00% 72.00% 70.00% 0 5 10 15 20 ILED(mA) η (%) Vin=5V Vin=12V 88.0% 87.0% 86.0% 85.0% 84.0% 83.0% 82.0% 81.0% 80.0% 79.0% 0 5 10 15 20 Vin = ILED (mA) Drive 3 Series 5 Parallel η (%)
561 E Elliott Rd, Suite 175, Chandler, Arizona Tel. (480) 539-2900 Fax. (480) 632-1715 www.protekanalog.com PA5110 Constant Current LED Driver. NOT FOR USE IN LIFE SUPPORT SYSTEMS TYPICAL DIM Millimeters Inches 0.70 1.90 0.95 2.40 1.00 0.028 0.074 0.037 0.094 0.039 SOT-23-6 PACKAGE OUTLINE & DIMENSIONS SOT23-6 PACKAGE DIMENSIONS MILLIMETERS INCHES DIM MIN MAX MIN MAX PACKAGE OUTLINE D 6 5 4 K O° ° 1 2 3 J B M A G A B C D E G J K L M 2.80 1.50 0.90 0.30 0.85 0.90 0.09 2.60 0.0 0.30 3.05 1.75 1.30 0.40 1.05 1.45 0.20 3.00 0.15 0.60 0.110 0.059 0.036 0.012 0.033 0.036 0.003 0.102 0.0 0.012 0.120 0.070 0.051 0.016 0.040 0.057 0.008 0.118 0.006 0.024 MOUNTING PAD NOTES 1. Dimensioning and tolerances per ANSI Y14.5M, 1985. 2. Controlling Dimension: Inches 3. Dimensions are exclusive of mold flash and metal burrs. 1. Surface mount product is taped and reeled in accordance with EIA-481. 2. Suffix -T7 = 7 Inch Reel - 3,000 pieces per 8mm tape, Outline & Dimensions: Rev 3 - 3/08, 06013 Tape & Reel Specifications (Dimensions in millimeters) Reel Dia. Tape Width A0 B0 K0 D E F W P0 P2 P tmax PO D P2 t 1O Pitches Cumulative Tolerance on Tape. + O.2 Top cover tape KO Pin 1 Indicated by Dot AO F w BO P User Direction of Feed COPYRIGHT © ProTek Devices 2007 SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except JEDEC). 5110 5110 5110 Pin1