AL5871Q DIODES | Alldatasheet
Document overview
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Technical content
Features
Wide Input Voltage Range from 5V to 55V Up to 750mA Output Current Capacity Low Drop-out Voltage on LED Pin Output Current Adjustable by a Low Power External Reference Resistor PWM and Analog Dimming with Excellent Linearity Automatically Enter and Exit Standby Mode Without Enable Pin Internal Protections: Input Under Voltage Lock-out (UVLO) Enable LED String Open Protection LED String Short Protection Over Temperature Protection (OTP) Diagnostic Enable with Adjustable Threshold for Low-Dropout Operation Thermal Fold-Back if Chip Temperature Exceeds the Threshold Fault Reporting: UVLO, OTP, LED Open, and LED Short Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) The AL5871Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF16949 certified facilities. https://www.diodes.com/quality/product-definitions/ Pin Assignments Top View 3 14 16VIN NC PWM DEN REF ADIM15 4NC 13 FAULTB EP NC NC NC LED11 9 NC GND NC NC TSSOP-16EP (Type DX)
Applications
Automotive interior lighting: dome light, reading lamps Automotive exterior lighting: Small light: blind-spot detection indicators, charging inlets, door handles Rear light: rear lamps, center high mounted stop lamps, side markers Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ 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.
© 2022 Copyright Diodes Incorporated. All Rights Reserved. Figure 1. Typical Application PWM 3 PWM Signal Input, Internally Pulled Down. Enable pin for LED open-circuit detection and thermal fold back function. VDEN > 1.2V, Open LED detection is enable. VDEN > 0.3V, Thermal fold back function is enable. VDEN < 0.2V, Thermal fold back function is disable. FAULTB 16 Fault Report. Asserted Low to report faulty conditions. mass for enhanced thermal impedance. It should not be used as electrical conduction path.
© 2022 Copyright Diodes Incorporated. All Rights Reserved. Figure 2. Functional Block Diagram 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 can affect device reliability.
- Device mounted on 2” x 2” FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer groun d
Document number: DS45259 Rev. 1 - 2 4 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q Electrical Characteristics (@TA = +25°C to +125°C, VIN = +12V, unless otherwise specified.) Symbol Parameter Test Conditions Min Typ Max Unit VVIN_UVLO VIN UVLO Voltage VVIN Rising 4.75 5.0 5.25 V VVIN_UVLO_HYS VIN UVLO Hysteresis VVIN Falling — 300 — mV IVIN_Standby Input Current in Standby Mode Standby Mode, PWM is “L” for 7ms — 300 — µA IDVCC_Q Input Current in Normal Mode Enabled, LED Pin Floating, PWM is “H”, RSET is 48kΩ — 0.7 — mA VIL_DEN DEN Logic Low Voltage for Open LED Detection — — 1.1 — V VIH_DEN DEN Logic High Voltage for Open LED Detection — — 1.2 — V VTH_DEN DEN Logic Low Voltage for Thermal Fold Back — — 0.2 — V VTH_DEN DEN Logic High Voltage for Thermal Fold Back — — 0.3 — V VIL_PWM PWM Logic Low Voltage — — — 0.4 V VIH_PWM PWM Logic High Voltage — 1.4 — — V IPWM_PD PWM Internal Pulldown VPWM = 5V 0.35 — 3.5 μA tPWM_SHDN Entrance Time for Standby Mode When PWM is Low — — 15 25 ms VADIM Voltage Range on ADIM Pin For Analog Dimming 0.3 — 1.5 V VADIM_ON DC Voltage on ADIM Pin for Analog Dimming On VADIM Rising — — 0.35 V VADIM_OFF DC Voltage on ADIM Pin for Analog Dimming Off VADIM Falling 0.15 — — V IADIM ADIM Sourcing Current — 19 20 22 µA VREF Base Reference Voltage — 1.47 1.5 1.53 V ILED_NOM Regulation Current RREF = 48kΩ — 375 — mA VLED_REG Minimum LED Regulation Voltage ILED = 125mA — 0.2 — V ILED_LEAK LED Pin Leakage Current VPWM = 0V, VLED = 12V — 0.1 5 μA ILED_ACCURACY LED Current Accuracy RREF = 48kΩ -4 — 4 % tLED_SHDG Short-Detection Deglitch 100% Duty-Cycle — 5 — ms NLED_SHDG PWM Dimming (count the number of continuous cycles when LED short is detected) — 7 — Cycles tLED_SH_HICCUP LED Short Protection Hiccup Time — — 128 — ms tLED_OPDG Open-Detection Deglitch 100% Duty-Cycle — 5 — ms NLED_OPDG PWM Dimming (count the number of continuous cycles when LED open is detected) — 7 — Cycles tLED_OPDG_CYCLE Open-Detection Deglitch Time per Cycle (Internal Only) — 20 — µs tLED_OP_HICCUP LED Open Protection Hiccup Time — — 128 — ms IF_PULLUP FAULTB Pullup Current VFAULTB = 1.6V — 500 — μA VF_PULLUP FAULTB Pullup Voltage Fault Pin Floating — 3 — V VFOL FAULTB Output Low Voltage IFAULTB = 1mA — — 600 mV VFIN_TH FAULTB Input Detect Threshold Voltage — — 1.33 — V IF_LKG FAULTB Leakage Current VFAULTB = 5V — — 5 μA TSHDN Thermal Shutdown Threshold — — +160 — ℃ TREC Thermal Recovery Threshold — — +130 — ℃
Document number: DS45259 Rev. 1 - 2 5 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q Typical Performance Characteristics (TA = +25°C, VIN = 12V, RREF = 48kΩ, ILED = 375mA, unless otherwise specified.) VIN Standby Current vs. Input Voltage VIN Standby Current vs. Temperature 5 10 15 20 25 30 35 40 45 50 55 150 160 170 180 190 200 210 220 230 240 250 Input Voltage(V) VIN Standby Current(A) -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 100 120 140 160 180 200 220 240 260 280 VIN Standby Current (A) Temperature(°C) VIN Quiescent Current vs. Input Voltage VIN Quiescent Current vs. Temperature 5 10 15 20 25 30 35 40 45 50 55 0.70 0.72 0.74 0.76 0.78 0.80 0.82 0.84 0.86 0.88 0.90 Input Voltage(V) VIN Quiescent Current (mA) -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 0.70 0.72 0.74 0.76 0.78 0.80 0.82 0.84 0.86 0.88 0.90 0.92 0.94 0.96 0.98 1.00 VIN Quiescent Current (mA) Temperature(°C) Reference Voltage vs. Input Voltage Reference Voltage vs. Temperature 5 10 15 20 25 30 35 40 45 50 55 1.36 1.38 1.40 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 Input Voltage(V) VREF (V) -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 1.36 1.38 1.40 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 VREF (V) Temperature(°C)
Document number: DS45259 Rev. 1 - 2 6 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q Typical Performance Characteristics (continued) (TA = +25°C, VIN = 12V, RREF = 48kΩ, ILED = 375mA, unless otherwise specified.) ADIM Sourcing Current vs. ADIM Voltage ADIM Sourcing Current vs. Temperature IADIM (A) ADIM Voltage (V) -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 IADIM (A) Temperature(°C) VADIM=0.5V VADIM=1V VADIM=2V VADIM=2.5V FAULT Sourcing Current vs. FAULT Voltage FAULT Sourcing Current vs. Temperature 100 150 200 250 300 350 400 450 500 550 600 IFAULT (A) FAULT Voltage (V) -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 120 150 180 210 240 270 300 330 360 390 420 450 480 510 540 570 600 630 IFAULT (A) Temperature(°C) VFAULT=0.5V VFAULT=1V VFAULT=1.5V VFAULT=2V VFAULT=2.5V FAULT Input Detection Threshold vs. Temperature VIN UVLO Voltage vs. Temperature -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 1300.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 VFAULT_th (V) Temperature(°C) FAULT_th_enable FAULT_th_disable -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 1304.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 VIN_UVLO (V) Temperature(°C) UVLO_H UVLO_L
Document number: DS45259 Rev. 1 - 2 7 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q Typical Performance Characteristics (continued) (TA = +25°C, VIN = 12V, RREF = 48kΩ, ILED = 375mA, unless otherwise specified.) LED Current vs. Temperature LED Current vs. RREF -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 300 320 340 360 380 400 420 440 460 ILED (mA) Temperature(°C) 0 20 40 60 80 100 120 140 160 180 200 220 120 180 240 300 360 420 480 540 600 660 720 780 840 900 RREF (Kohm) ILED (mA) LED Current vs. VLED Voltage Minimum LED Voltage vs. LED Regulation Current 150 225 300 375 450 525 600 675 750 825 900 ILED (mA) VLED (V) ILEDX=750mA ILEDX=375mA ILEDX=150mA 0 60 120 180 240 300 360 420 480 540 600 660 720 780 840 900 960 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 ILED (mA) Minimum LED Regulation Voltage (V) DEN Open LED Detection vs. Temperature Minimum LED Voltage vs. Temperature -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 1300.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 VDEN_th (V) Temperature(°C) DEN_enable DEN_disable -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 Minimum LED Regulation Voltage (V) Temperature(°C) RREF (kΩ)
Document number: DS45259 Rev. 1 - 2 8 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q Typical Performance Characteristics (continued) (TA = +25°C, VIN = 12V, RREF = 48kΩ, ILED = 375mA, unless otherwise specified.) LED Current vs. ADIM Voltage (RREF = 120kΩ, ILED = 150mA) LED Current vs. ADIM Voltage (RREF = 48kΩ, ILED = 375mA) 105 120 135 150 165 ILED (mA) ADIM Voltage (V) 120 150 180 210 240 270 300 330 360 390 ILED (mA) ADIM Voltage (V) LED Current vs. ADIM Voltage (RREF = 24kΩ, ILED = 750mA) LED Current vs. PWM Duty Cycle (RREF = 120kΩ, ILED = 150mA, 0 to 100% Duty) 120 180 240 300 360 420 480 540 600 660 720 780 ILED (mA) ADIM Voltage (V) 0 10 20 30 40 50 60 70 80 90 100 105 120 135 150 ILED (mA) PWM Duty Cycle (%) fPWM=200Hz fPWM=500Hz fPWM=1kHz LED Current vs. PWM Duty Cycle (RREF = 120kΩ, ILED = 150mA, 0 to 20% Duty) LED Current vs. PWM Duty Cycle (RREF = 48kΩ, ILED = 375mA, 0 to100% Duty) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ILED (mA) PWM Duty Cycle (%) fPWM=200Hz fPWM=500Hz fPWM=1kHz 0 10 20 30 40 50 60 70 80 90 100 120 150 180 210 240 270 300 330 360 390 ILED (mA) PWM Duty Cycle (%) fPWM=200Hz fPWM=500Hz fPWM=1kHz
Document number: DS45259 Rev. 1 - 2 9 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q Typical Performance Characteristics (continued) (TA = +25°C, VIN = 12V, RREF = 48kΩ, ILED = 375mA, unless otherwise specified.) LED Current vs. PWM Duty Cycle (RREF = 48kΩ, ILED = 375mA, 0 to 20% Duty) LED Current vs. PWM Duty Cycle (RREF = 24kΩ, ILED = 750mA, 0 to 100% Duty) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ILED (mA) PWM Duty Cycle (%) fPWM=200Hz fPWM=500Hz fPWM=1kHz 0 10 20 30 40 50 60 70 80 90 100 120 180 240 300 360 420 480 540 600 660 720 780 ILED (mA) PWM Duty Cycle (%) fPWM=200Hz fPWM=500Hz fPWM=1kHz LED Current vs. PWM Duty Cycle (RREF = 24kΩ, ILED = 750mA, 0 to 20% Duty) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 105 120 135 150 ILED (mA) PWM Duty Cycle (%) fPWM=200Hz fPWM=500Hz fPWM=1kHz
© 2022 Copyright Diodes Incorporated. All Rights Reserved. output LED current. The LED current can be controlled by digital PWM signal or analog dimming signal. Protection (OTP), and Under Voltage Lockout (UVLO). Integrated thermal fold-back function reduces the regulated current level at high junction temperatures to limit power dissipation. where VREF nominally 1.5V, ILED is in mA, and RREF in kΩ. For example, if RREF is 24kΩ, the AL5871Q provides 750mA output current. During UVLO, a FAULTB status will be reported. PWM pin is asserted and VIN pin is ramped up beyond minimum operation voltage, a start-up process will be performed. pin is pulled up to voltage higher than 1.4V, the AL5871Q will automatically exit the standby mode and perform its designated functions properly. cycle of PWM signal. The PWM frequency is recommended to be greater than 200Hz and less than 1kHz for better dimming linearity. 0.15V. The LED current is constant, rather than switching when PWM dimming. Figure 3. Analog Dimming Diagram
© 2022 Copyright Diodes Incorporated. All Rights Reserved. value. OTP protection is reported on the FAULTB pin. higher than 0.3V, and disabled when the voltage on DEN pin is less than 0.2V. Figure 4. Thermal Fold-Back Diagram wrong trigger, therefore the LED open protection is invalid when the PWM on time is shorter than 20μs during PWM dimming. voltage is not high enough for current regulation.
© 2022 Copyright Diodes Incorporated. All Rights Reserved. is shorter than 20μs during PWM dimming. together with an external pull-up resistor. Any FAULTB assertion from any device pulls the signal down and informs MCU of the faulty condition. there is no MCU, only a power cycle clears the fault. Figure 5. Fault-Line Bus Connection condition does not exist. Clearing the faults requires a power cycle of the device.
Document number: DS45259 Rev. 1 - 2 13 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q
Ordering Information
T16E: TSSOP-16EP (Type DX) Product Name Packing 13: Tape & Reel Part Number Part Number Suffix Package Code Package Packing Qty. Carrier AL5871QT16E-13 -13 T16E TSSOP-16EP (Type DX) 2500 Tape & Reel Marking Information Package Type: TSSOP-16EP (Type DX) ( Top View ) AL5871Q YY WW X X E Logo Marking ID WW : Week : 01 to 52; 52 YY : Year (ex: 22 = 2022) X X : Internal Code represents week 52 and 53 16 9 E : TSSOP-16EP (Type DX)
Document number: DS45259 Rev. 1 - 2 14 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. TSSOP-16EP (Type DX) TSSOP-16EP (Type DX) Dim Min Max Typ A -- 1.08 -- A1 0.05 0.15 -- A2 0.80 0.93 -- b 0.19 0.30 -- c 0.09 0.20 -- D 4.90 5.10 -- D2 2.70 -- -- E 6.40 BSC E1 4.30 4.50 -- E2 2.50 -- -- e 0.65 BSC L 0.45 0.75 -- L1 1.00 REF L2 0.25 BSC R 0.09 -- -- R1 0.09 -- -- θ 0° 8° -- θ1 5° 15° -- θ2 0° -- -- All Dimensions in mm Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. TSSOP-16EP (Type DX) Dimensions Value (in mm) C 0.65 X 0.35 X1 2.94 X2 2.45 X3 4.90 Y 1.40 Y1 2.00 Y2 2.72 Y3 6.80 Mechanical Data Moisture Sensitivity: Level 1 per J-STD-020 Terminals: Finish – Matte Tin Plated Leads, Solderable per JESD22-B102 Weight: 0.055 grams (Approximate) SEATING PLANE A D DETAIL 'A' GAUGE PLANE R L 01(18x ) SEE DETAIL 'A' c PIN 1 e b E E/2 1.350 1.050 C Y X
Document number: DS45259 Rev. 1 - 2 15 of 15 www.diodes.com November 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AL5871Q IMPORTANT NOTICE 1. DIODES INCORPORATED (Diodes) AND ITS SUBSIDIARIES MAKE NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO ANY INFORMATION CONTAINED IN THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICUL AR PURPOSE OR NON -INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 2. The Information contained herein is for informational purpose only and is provided only to illustrate the operation of Diodes’ products described herein and application examples. Diodes does not assume any liability arising out of the application or use of this document or any product described herein. This document is intended for skilled and technically trained engineering customers and users who design with Diodes’ products. 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