AL3022
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 12
Technical content
Features
Voltage Mode PWM Controller Low 0.2V Reference Voltage Fixed 140KHz Frequency External PWM Dimming and Analog Dimming Low Shutdown Current (0.1µA) External Compensation Built-in UVLO Function Built-in OVP Built-in OTP Built-in OCP Built-in VOUT Short to GND Protection Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) SO-8
Applications
LED TV LED Monitor LED Display Module Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Hal ogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Typical Applications Circuit 100pF AL3022 EN8 VIN1 COMP6 CS 4 GND 3 OUT 2 FB5 OVP 7 220nF 20KΩ 1.1Ω 22µF/25V 10KΩ VOUT 150kΩ 10KΩ 5.1KΩ D1L1 22µH/2A 2.2Ω VIN EN 1µF 1.2Ω 10µF/ 50V 10µF/ 50V VIN OUT GND CS EN OVP COMP FB
Document number: DS36514 Rev. 3 - 2 2 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT Pin Descriptions Pin Number Pin Name Function 1 VIN Supply input pin. A capacitor should be connected between the VIN pin and GND pin to keep the DC input voltage constant. 2 OUT Gate driver pin. This pin is connected to external MOSFET gate to turn it on/off.
3 GND Ground pin
4 CS Over current protection pin
5 FB Feedback pin. This pin is connected to an external resistor divider to program the system output voltage. 6 COMP Compensation pin. This pin is the output of the inter nal error amplifier. COMP is force d to low when VIN<3.6V.
7 OVP Overvoltage detection pin
Enable and dimming pin. When EN input voltage is lower than 0.3V, disable the IC. When EN input voltage is higher than 2.6V, enable the IC. PWM dimming can be provided by an external control signal greater than 100Hz, duty cycle from 1% to 90%. In addition, analog dimming can be provided by a DC signal ranged from 0.8 V to 2.4V. Functional Block Diagram EA Oscillator OVP & UVP EN FB GND OVP Control Logic Over Temperature Protection VIN 0 to 200mV REF Bandgap VCC Regulator 1.25V VCC COMP COMP SAW PULSE OUTDriver OCP CS
Document number: DS36514 Rev. 3 - 2 3 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VIN Input Voltage -0.3 to 20 V VEN EN Pin Voltage -0.3 to VIN +0.3 V VGATE OUT Pin Voltage 20 V VOVP OVP Pin Voltage 7 V VFB FB Pin Voltage -0.3 to +5.5 V TJ Operating Junction Temperature +150 °C TSTG Storage Temperature Range -65 to +150 °C TLEAD Lead Temperature (Soldering, 10sec) +260 °C θJA Thermal Resistance (Junction to Ambient) 105 °C/W – ESD (Machine Model) 600 V – ESD (Human Body Model) 4000 V Note 4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stres s ratings only, and functional operation of the device at these or any other conditions beyond those indi cated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Input Voltage 4 18 V TA Operating Ambient Temperature -40 +85 °C
Document number: DS36514 Rev. 3 - 2 4 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT Electrical Characteristics (@VIN = 5V, TA = +25°C, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Unit SUPPLY VOLTAGE (VIN PIN) VIN Input Voltage – 4.0 – 18 V IQ Quiescent Current Test at VFB = 0.3V – 5 – mA ISHDN Shutdown Supply Current VEN = 0V – 0.1 – µA UNDER VOLTAGE LOCKOUT VUVLO Input UVLO Threshold VIN Rising 3.6 3.8 4.0 V VHYS Input UVLO Hysteresis – 100 200 300 mV OVER VOLTAGE PROTECTION – Over Voltage Threshold – 1.45 1.55 1.65 V – Under Voltage Threshold – – 0.1 – V OVER CURRENT PROTECTION VCS Over Current Threshold Duty = 90% – 0.33 – V OVER TEMPERATURE PROTECTION TOTSD Thermal Shutdown Temperature – – +160 – °C – Thermal Shutdown Hysteresis – – +20 – °C ERROR AMPLIFIER Gm Error Amplifier Transconductance – – 400 – µ A/V ENABLE (EN PIN) VEN-OFF EN Pin Threshold – – – 0.3 V VEN-ON – 2.6 – – V VEN-DIM EN Pin Dimming Threshold – – 0.8 – V – – 2.4 – V VOLTAGE REFERENCE (FB PIN) VFB Feedback Voltage – 0.194 0.2 0.206 V IFB Feedback Bias Current – – 35 100 nA ∆VFB Line Regulation VIN = 4.5V to 18V – 2 20 mV GATE DRIVER (OUT PIN) fOSC Oscillator Frequency – 110 140 170 KHz DMAX Max. Duty Cycle – 90 95 99 % VGATE OUT Pin Voltage (Note 5) IOUT = 10mA – VIN-1 – V tRISE Rising Time VIN = 5V, OUT Pin Load = 1nF – 65.5 – ns tFALL Falling Time – 88.5 – ns Note 5: Guaranteed by design.
Document number: DS36514 Rev. 3 - 2 5 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT Performance Characteristic (@TA = +25° C, VDD = 5V, unless otherwise specified) Quiescent Current vs. Input Voltage Shutdown Supply Current vs. Input Voltage Feedback Voltage vs. Input Voltage Oscillator Frequency vs. Input Voltage Over Voltage Protection Voltage vs. Input Voltage Over Current Protection Voltage vs. Input Voltage 2 4 6 8 10 12 14 16 18 20 22 24 5.2 5.4 5.6 5.8 6.0 Quiescent Current (mA) Input Voltage (V) 2 4 6 8 10 12 14 16 18 20 22 24 0.00 0.05 0.10 0.15 0.20 0.25 0.30 Feedback Voltage (V) Input Voltage (V) 4 6 8 10 12 14 16 18 20 22 24130 135 140 145 150 Oscillator Frequency (KHz) Input Voltage (V) 2 4 6 8 10 12 14 16 18 20 22 24 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 Over Voltge Protection Voltage (V) Input Voltage (V) 2 4 6 8 10 12 14 16 18 20 22 24 0.300 0.305 0.310 0.315 0.320 0.325 0.330 0.335 0.340 Over Current Protection Voltage (V) Input Voltage (V) 4 6 8 10 12 14 16 18 20 22 24 0.0 0.2 0.4 Shutdown Supply Current (A) Input Voltage (V)
Document number: DS36514 Rev. 3 - 2 6 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT Performance Characteristic (Cont. @TA = +25° C, VDD = 5V, unless otherwise specified) FB Voltage vs. EN Voltage Quiescent Current vs. Temperature Shutdown Supply Current vs. Temperature Feedback Voltage vs. Temperature Oscillator Frequency vs. Temperature -50 -25 0 25 50 75 100 125 4.0 4.5 5.0 5.5 6.0 Quiescent Current (mA) Temperature ( O -50 -25 0 25 50 75 100 125 0.16 0.17 0.18 0.19 0.20 0.21 0.22 Feedback Voltage (V) Temperature ( O -50 -25 0 25 50 75 100 125 Shutdown Supply Current (A) Temperature ( O -50 -25 0 25 50 75 100 125 130 135 140 145 150 Oscillator Frequency (KHz) Temperature ( O 100 120 140 160 180 200 220 FB Voltage (mV) EN Voltage (V)
Document number: DS36514 Rev. 3 - 2 7 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT
Application Information
The AL3022 uses a constant frequency, voltage mode control scheme to provid e excellent line and load regulation. To drive LED load, the AL3022 can be connected as shown in the Typical Applications Circuit on page 1. The maximum duty cycle of the PWM controller is limited to 90%. PWM dimming input can be provided by an external control signal greater than 100Hz, duty ratio of 1% to 90%. In addition, analog dimming can be provided by a DC signal ranged from 0.8V to 2.4V. The AL3022 offers comprehensive protection features such as UVLO, OCP, OVP, OTP, LED open and VOUT Short to GND. Enable/Dimming Control The AL3022 uses EN pin to turn on and off the controller and also perform Digital (PWM) Dimming. When EN input voltage is lower than 0.3V, the controller turns off and the shutdown current can be limited below 0.1µA. When EN input voltage is higher than 2.6V, the controller turns on and the reference voltage is set to 0.2V. The AL3022 has an internal 80± 15%kΩ pull low resistor on the EN pin, thus the device is normally in the off state or shutdown mode operation. When a PWM signal was presented into the EN pin of the AL3022 shown in Figure 1 below. 1). When the EN pin is higher than 2.6V, the device will turn on and the output current is at the programmed maximum level. 2). When the EN pin is lower than 0.3V, the device will turn off and the output current goes to 0mA. If the frequency of the PWM signal is greater than 100Hz, the human eye cannot detect the on and off state of the LED s. The human eye can only see a dimmed diode rather than a pulsed brightness. This dimming method provides a controlled inrush current at turn-on. The PWM duty cycle from 0% to 100% controls the output current from 0mA to the maximum programmed level. AL3022 FB EN R PWM Figure 1. Digital Dimming Control Using a PWM Signal in EN Pin level by applying the DC voltage level from 0.8V to 2.4V. Comparing with all kinds of dimming control, this method features a best output voltage and LEDs current.
Figure 2. Analog Dimming Control Using a DC Voltage Signal in EN Pin The AL3022 external compensation circuit can clamp the output waveform to soft start smoothly.
- Over Voltage Protection / LED Open Protection
latched off status can be reset by reducing the supply voltage to lower than 3.6V or EN lower than 0.3V.
- Under Voltage Protection / VOUT Short to GND Protection
system can auto recover. This protects the converter if VOUT is shorted to ground. the voltage on CS pin exceeds 0.33V, it is turned off immediately and will not turn on until the next cycle begins.
- Over Temperature Protection
a no-latched protection. The device recovers once the temperature has decreased approximately +20oC.
Document number: DS36514 Rev. 3 - 2 9 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT
Ordering Information
AL3022 X XX – XX PackingPackageProduct Name TR : Tape & ReelM : SO-8 G1 : Green RoHS/Green Package Temperature Range Part Number Marking ID Packing SO-8 -40° C to +85°C AL3022MTR-G1 L3022M-G1 3000/13’’Tape & Reel Marking Information (Top View) First and Second Lines: Logo and Marking ID Third Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code XX: 7th and 8th Digits of Batch No. L3022 M-G1 YWWAXX
Document number: DS36514 Rev. 3 - 2 10 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SO-8 0 ° 8 ° 1 ° 7 ° R0.150(0.006) R0.150(0.006) 1.000(0.039) 0.300(0.012) 0.510(0.020) 1.350(0.053) 1.750(0.069) 0.100(0.004) 0.300(0.012) 3.800(0.150) 4.000(0.157) 7 ° 20:1 D 1.270(0.050) TYP 0.150(0.006) 0.250(0.010) 8 ° D 5.800(0.228) 6.200(0.244) 0.600(0.024) 0.725(0.029) 0.320(0.013) 8 ° 0.450(0.017) 0.820(0.032) 4.700(0.185) 5.100(0.201) Note: Eject hole, oriented hole and mold mark is optional. Option 1 Option 1 Option 2 0.350(0.014) TYP TYP TYP 9°~ 9°~
Document number: DS36514 Rev. 3 - 2 11 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT Suggested Pad Layout (1) Package Type: SO-8 Grid placement courtyard ZG Y E X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch)
Document number: DS36514 Rev. 3 - 2 12 of 12 www.diodes.com September 2014 © Diodes Incorporated AL3022 3043 A Product Line of Diodes Incorporated NEW PRODUCT IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARR ANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability a rising out of the application or use of this document or any product described herein; neither does Diodes Incorporated co nvey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such appli cations shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees ar ising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Prod uct names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or system s without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when proper ly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems , notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorpora ted and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2014, Diodes Incorporated www.diodes.com