A Product Line of Diodes Incorporated AL3022 3043 PWM BOOST CONTROLLER Description Pin Assignments (Top View) VIN 1 8 EN The AL3022 offers complete system protection with integrated Under Voltage Lockout, Over Voltage Protection, Over Current Protection, Output Voltage (VOUT) Short to GND Protection and Over OUT 2 7 OVP Temperature Protection circuitry. GND 3 6 COMP CS 4 5 FB To satisfy the limited PCB mounting space requirements, this IC is available in SO-8 package to save space. Features SO-8 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) Notes: Applications LED TV LED Monitor LED Display Module 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 Halogen- 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 D1 L1 VIN C2 C1 22µH/2A 22µF/25V C3 VOUT 10µF/ 50V 3 10µF/ 50V EN U1 1 R1 8 10KΩ 6 R2 20KΩ 5 C5 VIN EN COMP FB OUT GND CS R4 2 10KΩ Q1 R3 1 2.2Ω 2 C4 1µF AL3022 NEW PRODUCT The AL3022 is a constant 140KHz, voltage mode, external compensation boost controller. The AL3022 has low feedback voltage and makes it ideal for low cost LED backlight supplies. The AL3022 can support external PWM dimming and analog dimming. R5 150kΩ 3 4 OVP 7 R7 1.1Ω R8 1.2Ω R6 5.1KΩ 100pF C6 220nF AL3022 Document number: DS36514 Rev. 3 - 2 1 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 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 internal error amplifier. COMP is forced to low when VIN<3.6V. 7 OVP 8 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. EN Functional Block Diagram FB COMP 5 6 7 OVP & UVP EA COMP 0 to 200mV REF EN 8 Bandgap Control Logic Driver OCP 1.25V VCC VCC Regulator SAW NEW PRODUCT Pin Descriptions Oscillator Over Temperature Protection 2 4 3 OVP OUT CS GND PULSE 1 VIN AL3022 Document number: DS36514 Rev. 3 - 2 2 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 Absolute Maximum Ratings (Note 4) NEW PRODUCT Symbol Parameter VIN Input Voltage VEN EN Pin Voltage Rating Unit -0.3 to 20 V -0.3 to VIN +0.3 V VGATE OUT Pin Voltage 20 V VOVP OVP Pin Voltage 7 V -0.3 to +5.5 V +150 °C -65 to +150 °C VFB TJ FB Pin Voltage Operating Junction Temperature TSTG Storage Temperature Range TLEAD Lead Temperature (Soldering, 10sec) +260 °C Thermal Resistance (Junction to Ambient) 105 °C/W – ESD (Machine Model) 600 V – ESD (Human Body Model) 4000 V θJA Note 4. 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 Symbol Parameter VIN Input Voltage TA Operating Ambient Temperature AL3022 Document number: DS36514 Rev. 3 - 2 3 of 12 www.diodes.com Min Max Unit 4 18 V -40 +85 °C September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated Electrical Characteristics Symbol AL3022 3043 (@VIN = 5V, TA = +25°C, unless otherwise specified.) Parameter Conditions Min Typ Max Unit 4.0 – 18 V SUPPLY VOLTAGE (VIN PIN) VIN Input Voltage – IQ Quiescent Current Test at VFB = 0.3V – 5 – mA Shutdown Supply Current VEN = 0V – 0.1 – µA NEW PRODUCT ISHDN 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 Duty = 90% – 0.33 – V Thermal Shutdown Temperature – – +160 – °C Thermal Shutdown Hysteresis – – +20 – °C – – 400 – µA/V – – – 0.3 V – 2.6 – – V – – 0.8 – V – – 2.4 – V OVER CURRENT PROTECTION VCS Over Current Threshold OVER TEMPERATURE PROTECTION TOTSD – ERROR AMPLIFIER Gm Error Amplifier Transconductance ENABLE (EN PIN) VEN-OFF EN Pin Threshold VEN-ON VEN-DIM EN Pin Dimming Threshold VOLTAGE REFERENCE (FB PIN) VFB Feedback Voltage – 0.194 0.2 0.206 V IFB Feedback Bias Current – – 35 100 nA Line Regulation VIN = 4.5V to 18V – 2 20 mV ∆VFB 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 – 65.5 – ns – 88.5 – ns tRISE Rising Time tFALL Falling Time VIN = 5V, OUT Pin Load = 1nF Note 5: Guaranteed by design. AL3022 Document number: DS36514 Rev. 3 - 2 4 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 Performance Characteristic (@TA = +25°C, VDD = 5V, unless otherwise specified) Quiescent Current vs. Input Voltage Shutdown Supply Current vs. Input Voltage Shutdown Supply Current (A) Quiescent Current (mA) 5.8 5.6 5.4 5.2 2 4 6 8 10 12 14 16 18 20 22 0.4 0.2 0.0 24 4 6 8 10 Input Voltage (V) 12 14 16 18 20 22 24 Input Voltage (V) Feedback Voltage vs. Input Voltage Oscillator Frequency vs. Input Voltage 150 0.30 Oscillator Frequency (KHz) Feedback Voltage (V) 0.25 0.20 0.15 0.10 0.05 0.00 2 4 6 8 10 12 14 16 18 20 22 145 140 135 130 4 24 6 8 10 12 14 16 18 20 22 24 Input Voltage (V) Input Voltage (V) Over Voltage Protection Voltage vs. Input Voltage Over Current Protection Voltage vs. Input Voltage 1.60 0.340 1.55 0.335 Over Current Protection Voltage (V) Over Voltge Protection Voltage (V) NEW PRODUCT 6.0 1.50 1.45 1.40 1.35 1.30 1.25 1.20 0.330 0.325 0.320 0.315 0.310 0.305 0.300 2 4 6 8 10 12 14 16 18 20 22 24 Input Voltage (V) AL3022 Document number: DS36514 Rev. 3 - 2 2 4 6 8 10 12 14 16 18 20 22 24 Input Voltage (V) 5 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 Performance Characteristic (Cont. @TA = +25°C, VDD = 5V, unless otherwise specified) FB Voltage vs. EN Voltage Quiescent Current vs. Temperature 6.0 220 200 180 5.5 Quiescent Current (mA) FB Voltage (mV) 140 120 100 80 60 5.0 4.5 40 20 0 0.5 1.0 1.5 2.0 2.5 3.0 4.0 -50 3.5 0 25 50 75 100 125 O Temperature ( C) Shutdown Supply Current vs. Temperature Feedback Voltage vs. Temperature 0.22 0.21 Feedback Voltage (V) Shutdown Supply Current (A) -25 EN Voltage (V) 2 1 0 0.20 0.19 0.18 0.17 -1 -50 -25 0 25 50 75 100 0.16 -50 125 -25 0 25 50 75 100 125 O O Temperature ( C) Temperature ( C) Oscillator Frequency vs. Temperature 150 Oscillator Frequency (KHz) NEW PRODUCT 160 145 140 135 130 -50 -25 0 25 50 75 100 125 O Temperature ( C) AL3022 Document number: DS36514 Rev. 3 - 2 6 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 Application Information General Operation The AL3022 uses a constant frequency, voltage mode control scheme to provide 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. NEW PRODUCT 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 LEDs. 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. PWM EN AL3022 FB R Figure 1. Digital Dimming Control Using a PWM Signal in EN Pin Analog Dimming Control The Analog Dimming is to inject a constant DC voltage to EN pin shown in Figure 2 below. The feedback voltage is indirectly adjusted when the EN pin voltage is from 0.8V to 2.4V, which can be used as dimming control. The output LED current can be adjusted from minimum to maximum 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. AL3022 Document number: DS36514 Rev. 3 - 2 7 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 Application Information (cont.) DC Voltage 0.8V to 2.4V EN AL3022 NEW PRODUCT FB R Figure 2. Analog Dimming Control Using a DC Voltage Signal in EN Pin Soft Start Control The AL3022 external compensation circuit can clamp the output waveform to soft start smoothly. Operation Protection 1. Under Voltage Lockout The AL3022 provides an under voltage lockout circuit to prevent it from undefined status when startup. The Under Voltage Lockout circuit turns the driver off when supplying voltage drops below 3.6V. The UVLO circuit has 200mV hysteresis, which means the device starts up again when VIN rises to 3.8V. 2. Over Voltage Protection / LED Open Protection The controller has an internal OVP circuit. The controller output voltage will boost too high when LEDs are disconnected from the circuit or fail to open. The AL3022 will latch off the output if the OVP pin senses a voltage that is larger than 1.55V, and the power switching will be turned off. The latched off status can be reset by reducing the supply voltage to lower than 3.6V or EN lower than 0.3V. 3. Under Voltage Protection / VOUT Short to GND Protection The AL3022 monitors the OVP pin, if the OVP pin voltage is less than 0.1V, MOSFET drive output will turn off. When OVP is higher than 0.1V, system can auto recover. This protects the converter if V OUT is shorted to ground. 4. Over Current Protection The AL3022 integrates an OCP circuit. The CS pin is connected to the voltage-sensor (RCS) that placed between the Drain of MOS and GND. If the voltage on CS pin exceeds 0.33V, it is turned off immediately and will not turn on until the next cycle begins. 5. Over Temperature Protection The AL3022 monitors the temperature of itself. The AL3022 shuts itself off if the temperature exceeds the threshold value (typically +160oC). This is a no-latched protection. The device recovers once the temperature has decreased approximately +20oC. AL3022 Document number: DS36514 Rev. 3 - 2 8 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 Ordering Information AL3022 X XX – XX NEW PRODUCT Product Name RoHS/Green Package Packing M : SO-8 TR : Tape & Reel G1 : 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) L3022 M-G1 YWWAXX - AL3022 Document number: DS36514 Rev. 3 - 2 First and Second Lines: Logo and Marking ID Third Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code th th XX: 7 and 8 Digits of Batch No. 9 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SO-8 4.700(0.185) 5.100(0. 201) 7° ~ 9° 0.320(0. 013) TYP 1.350(0. 053) 1.750(0. 069) NEW PRODUCT 8° 8° ~ 9° 7° 0.600(0. 024) 0.725(0. 029) D 5.800(0. 228) 6.200(0. 244) 1.270(0. 050) TYP D 20:1 0.300(0. 012) R0.150(0.006) 0.100(0. 004) 1.000(0. 039) TYP 3.800(0. 150) Option 1 4.000(0. 157) 0.300(0. 012) 0.150(0. 006) 0.250(0. 010) Option 1 0° 8° 1° 7° 0.510(0. 020) R0.150(0.006) 0.450(0. 017) 0.820(0. 032) Option 2 0.350(0. 014) TYP Note: Eject hole , oriented hole and mold mark is optional . AL3022 Document number: DS36514 Rev. 3 - 2 10 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 Suggested Pad Layout (1) Package Type: SO-8 NEW PRODUCT Grid placement courtyard G Z Y E X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch) Value 6.900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 1.270/0.050 AL3022 Document number: DS36514 Rev. 3 - 2 11 of 12 www.diodes.com September 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AL3022 3043 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 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems 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 properly 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 devices 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 Incorporated 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 AL3022 Document number: DS36514 Rev. 3 - 2 12 of 12 www.diodes.com September 2014 © Diodes Incorporated