AL1771 DIODES | Alldatasheet
Document overview
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Technical content
Features
High PFC Controller and Dimmable Linear LED Driver in O ne Package Valley Detection to Achieve Low Switching Loss and High Efficiency Input Voltage Range for LED Driver (DVCC): 6.5V to 3 0V Each Channel I ndependent PWM Dimming Control Adjustable Reference Current by External Reference Resi stors LED Current Accuracy ≤ ± 4% Maximum LED Current 1500mA for AL1771 and 750mA Per Channel to AL1772 Adaptive Thermal Management (ATM) Scheme to Minimize Power Dissipation Low Standby Power Mode with Automatically Enter and Exit High Frequency E-Flicker Free PWM Dimming with Deep Dimming Capability Protections: PFC Controller: Under Voltage Lockout (UVLO) Over Voltage Protection (OVP) Over Current Protection (OCP) Output Short Protection (OSP) Over-Temperature Protection (OTP): Thermal Shutdown and Auto Thermal Recovery Dimmable Linear LED Driver: Under Voltage Lockout (UVLO) LED String O pen/Short Protection Over-temperature Protection (OTP): Thermal Shutdown and Auto Thermal Recovery Pin Assignments (Top View) TP REF1 DVCC NC PWM1 DGND NC LED1 FAULTB LEDPG FB COMP AVCC GD AGND CS EP TSSOP-16EP (Type DX) (AL1771) (Top View) REF2 REF1 DVCC PWM2 PWM1 DGND LED2 LED1 FAULTB LEDPG FB COMP AVCC GD AGND CS EP TSSOP-16EP (Type DX) (AL1772)
Applications
1-Channel Dimmable Connected Light Bulbs 2-Channel Tunable White Connected Bulbs Smart Connected LED Tubes, Panel Lights, Troffers, and Ceiling Lights Fault Reports: UVLO, OTP, LED Open/Short Low System BOM Ambient Temperature Operating Range -40°C to +125°C TSSOP-16EP (Type DX): Available in “Green” Molding Compound (No Br, Sb) Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) 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 in formation 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 bro mine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
Figure 1. 1-Channel Dimmable White
Figure 2. 2-Channel Tunable White
Figure 3. 4-Channel White+RGB
Document number: DS41314 Rev. 1 - 2 5 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Pin Descriptions Pin Number Pin Name Function AL1771 AL1772
1 TP REF2 Reference Current Setting through External Resistor (RSET2) for AL1772; TP pin is a test
pin for AL1771, not to input any voltage to TP pin.
2 REF1 REF1 Reference Current Setting through External Resistor (RSET1)
3 DVCC DVCC Power Supply for LED Driver Section
4 NC PWM2 PWM Signal Input for Channel-2, Internally Pulled Down for AL1772; Not Connected for
AL1771. 5 PWM1 PWM1 PWM Signal Input for Channel-1, Internally Pulled Down.
6 DGND DGND Ground for LED Driver Section
7 NC LED2 Channel-2 LED Cathode for AL1772; Not Connected for AL1771.
8 LED1 LED1 Channel-1 LED Cathode
9 CS CS Current Sense for PFC Controller
10 AGND AGND Ground Pin for PFC Controller
11 GD GD Gate Drive for PFC Controller
12 AVCC AVCC Power Supply for PFC Controller
13 COMP COMP PFC Loop Compensation
14 FB FB PFC output voltage feedback and inductor current zero-crossing detection pin. 15 LEDPG LEDPG Adaptive thermal management adjusting current output. Tied to FB to adjust PFC output voltage. 16 FAULTB FAULTB Fault Report. Asserted Low to report faulty conditions. N eeds an external pull- up resistor. Exposed PAD EP EP Exposed pad. It should be externally connected to G round and thermal mass for enhanced thermal impedance. It should not be used as electrical conduction path.
Figure 4. Functional Block Diagram of AL1772 (Note 4) Note 4: REF2, PWM2 and LED2 are not applicable to AL1771. affected by exposure to absolute maximum rating conditions for extended periods of time.
Document number: DS41314 Rev. 1 - 2 7 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Electrical Characteristics (@TA = +25°C, VAVCC, VDVCC = 12V, unless otherwise specified.) Symbol Parameter Test Conditions Min Typ Max Unit PFC Section VAVCC_ST AVCC Startup Threshold Voltage VAVCC Rising — 19 — V VAVCC_OPR_MIN AVCC Minimal Operating Voltage VAVCC Falling (After Startup ) 7.0 — 8.5 V VAVCC_OVP AVCC OVP Voltage — — 30 — V IAVCC_ST AVCC Startup Current VCC = VST-0.5V, Before Start-up — 3 — µA IAVCC_OPR AVCC Operating Current Static - No Switching (VCS = 0.6V) — 500 — µA IAVCC_OVP AVCC Shunt Current in OVP mode VCC = 15V after VCC >VCC_OVP Triggered — 2.5 — mA VGD_H GD High Level VAVCC = 18V 12 13.5 15 V VGD_L GD Low Level IGD_SINK = 20mA, VAVCC = 12V — — 1 V tGD_R GD Voltage Rise Time CL = 1nF — 100 — ns tGD_F GD Voltage Fall Time CL = 1nF — 50 — ns tGD_ON_MIN GD Minimum On Time — — 0.7 — µs tGD_ON_MAX GD Maximum On Time — — 17 — µs tGD_OFF_MIN GD Minimum Off Time — — 1.2 — µs tGD_OFF_MAX GD Maximum Off Time — — 40 — µs fGD_MAX GD Maximum Frequency — — 120 — kHz VCS_OCP Primary Current OCP — — 0.5 — V GMCOMP COMP Transconductance — — 100 — µA/V IMAX_COMP_SOURCE COMP Maximum Source Current VFB = 0.8V — 16 — µA IMAX_COMP_SINK COMP Maximum Sink Current VFB = 1.5V — 16 — µA VFB_CV FB CV Threshold Voltage — 1.15 1.2 1.25 V VFB_OVP FB OVP Threshold Voltage — — 1.35 — V LED Driver Section VDVCC_UVLO DVCC UVLO Voltage VDVCC Rising — 6 — V VDVCC_UVHYS DVCC UVLO Hysteresis VDVCC Falling — 300 — mV VDVCC_OVP DVCC OVP Voltage VDVCC Rising when IDVCC > 5mA — 33 — V IMAX_DVCC_OVP Maximum DVCC OVP Current VDVCC > VDVCC_OVP — 7 — mA IDVCC_Low_Power DVCC Supply Current at Low- Power Mode Low-Power Mode, PWMx are “L” — 300 — µA IDVCC_Q DVCC Quiescent Supply Current Enabled, LEDx floating, PWMx are “H”, RSETx is 12kΩ — 1.5 — mA VIL(PWMx) PWM Low Voltage — — — 0.4 V VIH(PWMx) PWM High Voltage — 1.4 — — V fPWMx PWM Frequency — 0.5 — 40 kHz I(PWMx-PD) PWM Internal Pulldown VPWMx = 5V 0.35 — 3.5 μA tPWMx_MIN. ON Minimum PWMx On Time — — 2.5 — μs tPWMx_Low_Power Low-Power Time — — 4 — ms VREFx Reference Voltage — 1.47 1.5 1.53 V IREFx Reference Current RSETx = 12kΩ — 125 — µA ILED1_NOM Regulation Current for Channel 1 (AL1771) RSETx = 12kΩ — 500 — mA Regulation Current for Channel 1 (AL1772) RSETx = 12kΩ — 250 — mA ILED2_NOM Regulation Current for Channel 2 RSETx = 12kΩ — 250 — mA VLEDx_REG Minimum LED Regulation Voltage ILEDx = 250mA — 250 — mV ILEDx_LEAK LEDx Leakage Current VPWMx = 0V, VLEDx = 12V — 0.1 2 μA ILEDx_ACCURACY LEDx Current Accuracy RSETx = 12kΩ -4.0 — 4.0 % VLEDxSHP LED Short Protection Threshold — — 9 — V tLEDxSHDG Short-detection Deglitch 100% duty-cycle — 4 — ms
Document number: DS41314 Rev. 1 - 2 8 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Electrical Characteristics (Cont.) Symbol Parameter Test Conditions Min Typ Max Unit NLEDxSHDG — PWM Dimming (count the number of continuous cycles when LED short is detected) — 15 — Cycles tLEDxSH_HICCUP LED Short Protection Hiccup Time — — 128 — ms tLEDxOPDG Open-detection Deglitch 100% duty-cycle — 6 — ms NLEDxOPDG PWM Dimming (count the number of continuous cycles when LED open is detected) — 15 — Cycles tLEDxOP_HICCUP LED Open Protection Hiccup Time — — 128 — ms tSS Soft-start Time VPWMx = 5V, 90% of ILEDx_NOM — 200 — µs ILEDPG_FULL LEDPG Full Current — — 32 — µA ILEDPG_LSB LEDPG LSB Current — — 0.5 — µA tLEDPG_ADJUST LEDPG Adjust Time — — 512 — ms TSHDN Thermal Shutdown Threshold — — +160 — ° C THY Temperature Hysteresis — — +30 — ° C VFOL FAULTB Output Low Voltage IFAULTB = 1mA — — 180 mV IFOH FAULTB Leakage Current VFAULTB = 5V — — 1 μA θJA Thermal Resistance Junction-to- Ambient TSSOP-16EP (Type DX) (Note 5) — 50 — °C/W θJC Thermal Resistance Junction-to- Case TSSOP-16EP (Type DX) (Note 5) — 15 — °C/W Note 5: Device mounted on 2” x 2” FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top la yer and thermal vias to bottom layer ground plane.
Document number: DS41314 Rev. 1 - 2 9 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Typical Performance Characteristics AVCC Startup Threshold Voltage vs. Ambient Temperature AVCC Operating Current vs. Ambient Temperature AVCC Minimal Operating Voltage vs. Ambient Temperature FB CV Threshold vs. Ambient Temperature DVCC UVLO Voltage vs. Ambient Temperature DVCC OVP Voltage vs. Ambient Temperature -40 -20 0 20 40 60 80 100 120200 250 300 350 400 450 500 550 IAVCC_OPR(A) Ambient Temperature (C) -40 -20 0 20 40 60 80 100 12017.0 17.5 18.0 18.5 19.0 19.5 20.0 20.5 21.0 VAVCC_ST(V) Ambient Temperature (C) -40 -20 0 20 40 60 80 100 1207.0 7.2 7.4 7.6 7.8 8.0 8.2 8.4 8.6 VAVCC_OPR_MIN(V) Ambient Temperature (C) -40 -20 0 20 40 60 80 100 1201.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 VFB_CV(V) Ambient Temperature (C) -40 -20 0 20 40 60 80 100 1205.5 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3 6.4 6.5 VDVCC_UVLO(V) Ambient Temperature (C) -40 -20 0 20 40 60 80 100 12032.0 32.2 32.4 32.6 32.8 33.0 33.2 33.4 33.6 33.8 34.0 DVCC_OVP (V) Ambient Temperature (C)
Document number: DS41314 Rev. 1 - 2 10 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Typical Performance Characteristics (Cont.) Reference Voltage for Channel 1 Regulation Current for Channel 1 vs. Ambient Temperature vs. Ambient Temperature LED Current vs. PWM Duty (f = 4kHz, 0~100%) LED Current vs. PWM Duty (f = 4kHz, 0~10%) -40 -20 0 20 40 60 80 100 1201.40 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 1.58 1.60 VREF1 (V) Ambient Temperature (C) -40 -20 0 20 40 60 80 100 120220 230 240 250 260 270 280 ILED1 (mA) Ambient Temperature (C) 0 2 4 6 8 100 ILED1(mA) PWM Duty (%) 0 20 40 60 80 1000 100 150 200 250 ILED1(mA) PWM Duty (%)
driver regulates the LED currents and supports high performance PWM dimming. switching method to reduce switching loss and improve EMI performance. After AC supply is powered on, the capacitor C3 across AVCC and GND pins will be charged up by BUS voltage through a start-up resistor R7. could supply enough energy to maintain AVCC above VAVCC_OPR_MIN. If AVCC voltage is lower than VAVCC_OPR_MIN , the switch will be turned off. turns to be modulated by the external compensation network. Figure 5. Start Up Waveform
- Constant Voltage Operation
R5 and R6 that is shown as Figure 1 divide reflected voltage.
Where: VCS_OCP means primary current clamp voltage that is 0.5V. RCS is current sense resister shown as Figure 1. switch will be shutdown. Until the junction temperature falls to the recovery temperature, the PFC controller will be restarted. power requirement for SCL bulbs. It also integrates Adap tive Thermal Management (ATM) scheme to minimize non-productive power dissipation. temperature protection (OTP); when detecting these fault conditions, it will report the fault status on FAULTB pin.
- Enable and Soft-Start LED Drivers
slew-rate-controlled current ramp over 200μS at LEDx output pins to minimize current overshoot through LED strings for optimal system reliability. When all PWMx are inactive for 4ms, The LED Driver will enter Low-Power mode with ultra-low standby power.
- LED Current Setting and Capability
AL1772 provides same current amount of 500mA. effectiveness or different anode voltages for efficiency optimization. Table 1. Recommended Maximum Channel Current and Total IC Current for AL1771/1772
Table 2. Recommended Minimum Channel Current and Total IC Current for AL1771/1772 Along with bus-mode fault reporting, multiple devices can b e employed together to increase current driving capability or channel count versatility. The maximum LED current for the channel can be adjusted up to 1500mA via RSET resistor for AL1771 and 750mA for AL1772.
- High Performance PWM Dimming
speaking, the higher the PWM dimming signals applied to the light source, the less visible e-Flicker detected by electronic components. signal will turn it off. Consequently, the LED current and LED brightness of each corresponding channel can be adjusted. 0.4%@4kHz, or 1.0%@10kHz. PWM signals can be driven static low or high to turn off or on the corresponding channels constantly.
- Low-Power Mode and Adaptive Thermal Management (ATM)
requirement for SCL bulbs, this power saving is very significant. When any PWM signal is detected, the Linear LED driver will automatically exit the low power mode and perform it designated functions properly.
Document number: DS41314 Rev. 1 - 2 15 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Functional Description (Cont.) AL1771/1772 constantly detects and reports V LEDx (voltage measured at Pin LEDx) output headroom condition by ejecting a voltage-adjustment current out of LEDPG pin. If the V LEDx in any channel is lower than or close to the dropout voltage required by the regulator (V LED_REG) while the channel is enabled with PWMx, there will be no voltage-adjus tment current. During PWMx low period, internal LEDPG will no t report insufficient headroom for that channel. If the V LEDx voltage in each channel is higher than the dropout voltag e required by the regulator (V LEDx_REG), the LEDPG will inject the adjustment current. The ATM scheme utilizes LEDPG information and providesfeedback information to the power conversion circuitry to fine tune the LED power, to ensure minimum voltage headroom to drive emitter strings while maintain regulation channel current. 5. Protection Features and Fault Reporting (1) Under Voltage Lockout Under-voltage lockout function (UVLO) guarantees that the device is initially off during start-up. The Linear LED driver is not turned ON until the DVCC power supply has reached 6V. Whenever the DVCC input voltage falls below approximately 5.7V, the device is turned off. The UVLO circuit has a hysteresis of 300mV. During UVLO, a FAULTB status will be reported. (2) LED Open and Short Protection The AL1771/1772 detects the LED status by monitoring th e current and voltage status of the LED strings. When an abnormal condition occurs (LED Open or LED Short), FAULTB is asserted low for 128 ms and the abnormal channel will be retested afterward to check if the abnormal condition is cleared . LED driver will be re-activated if the abnormal condition is clea red. In the case of LED Open or Short, all non-affecte d channels remain in the normal operating condition. (3) Over Temperature Protection Thermal protection prevents the Linear LED driver from damage when the die temperature exceeds safe margins. The Linear LED driver features Over Temperature Protection (OTP). When the junction temperature reaches +160ºC, the Linear LED driver will enter thermal shut down mode in which all current sinks are shut down and no current flows to LED strings. The normal current level can be automatically restored to its set current from OTP by triggering a Soft Start when the temperature lowers down below +130ºC. LED Driver’s Thermal Shutdown Mode will also be reported as a FAULTB. (4) Fault Reports Fault reporting serves as a good communication channel betwe en LED drivers and intelligent MCU unit. AL1771/1772 dete cts and reports the FAULTB status upon the occurrence of Thermal Shutdown in OTP, LED Short, LED Open, and UVLO. FAULTB pin is an open-drain output design. Multiple devices can share a single FAULTB signal by connecting all FAULTB pins together with an external pull-up resist or. Any FAULTB assertion from any device pulls the signal down and informs MCU of the faulty condition.
Document number: DS41314 Rev. 1 - 2 16 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772
Application Information
- Examples of Smart Light Bulb and LED Panel Light (1) System Configurations Emerging smart LED light bulbs, including Tunable White and Tunable C olor products used in either wired or wireless control applicat ions, address human needs for energy saving, light quality sc ene setting and entertainment light management. Typical block diagram of a smart light bulb, consisting of four major functional blocks - PFC Power C onversion, Wireless/Color Management MCU, LED driver and an emitter module. AL1771/1772 fits well with emerging Smart Connected Light bulbs illustrating as below: 1-Channel Dimmable White (Figure 1) Brightness adjustment with Fixed Correlated Color Temperature (CCT) White 2-Channel Tunable White (Figure 2) CCT Tuning with range fr om 2,700k to 6,500k 4-Channel White+RGB (Figure 3) White +RGB color mixing For wireless-enabled Smart Connected LED Panel Lights, Troffer s and Ceiling Lights, AL1771/ 1772 can be used to drive emitter string(s) for either 1-channel Dimmable White or 2-channel Tunable White applications as shown in Figure 1 and Figure 2. The AL1771/1772 can also be used to drive White+RBG 4-channel LEDs combined with AL1782 for color mixing application as shown in Figure 3. (2) Interface with Emitter Strings and AL1771/1772 The AL1771/1772 PFC Power Conversion circuitry provides nece ssary output constant voltages (CVs) to power the M CU and the Linear LED Driver blocks of the entire smart light bulbs. Typical applica tions for smart light bulbs might require 3.3V for MCU and 12/24V for LED emitter strings of mainstream smart light bulbs. Anodes of top LED em itter strings are connected to 12/24V power supply. An d cathodes of bottom LED emitter strings are connected to LEDx pins of AL1771/1772. (3) Interface with Wireless/Color Management MCU and AL1771/1772 The main physical interfaces between MCU and AL1771/1772 are PWMx pins and FAULTB. MCU activates the PWMx (as serted high) to turn on AL1771/1772 in active state for normal LED lighting operat ion. When PWMx pins are asserted low for 4ms, the entire AL 1771/1772 enters Low- Power mode with minimum power consumption. For typical light d imming or mixing operations, MCU generates proper PWM signals output through PWMx pins. In case of any general fault occurs in AL1771/1772, FAULTB pin is asserted LOW to interrupt MCU for proper actions. (4) LED Driver Design Topology and Implementation For AL1771/1772-powered LED Driver/Emitter block adopts a multi-channel LED driver structure with PWM dimming control for each channel. The parallel LED driver channel structure covers mainstream applications for Smart Connected Lighting products. Given the maximum allowable input voltage of 30V, AL1771/1772 can support a LED string u p to 8 emitters of W, B, G (assuming LED Emitter Forward Voltage Drop, VF~3.1V) or 10 emitters of R (assuming V F ~2.2V) in series typically. It is still possible to driver mo re than 8 emitters by slitting LED Emitter string voltage and AVCC/DVDD as long as AVCC and DVCC are below 30V. For 1-channel Dimmable White (Figure 1), the Reference Current (IREF1) of AL1771 is set by an external resistor RSET1. In the case using 10kΩ as RSET1, Channel 1 of AL1771 will be driving emitter string(s) with a total constant current of 600mA. As an example of a 2-channel Tunable White light bulb design (Fig ure 2), an AL1772 drives two emitter strings, namely, CCTc old (6,500k) and CCTwarm (2,700k). Using R SET1 and RSET2 of 8.2kΩ, the maximum current for Channel 1 and Channel 2 will be 3 65mA if each PWM signal is turned on. The associated MCU could generate suitable PWM p atterns to meet the required CCT tuning to target light output. The associated MCU could generate suitable PWM patterns to meet the re quired CCT tuning to target light output. R SET1 and RSET2 can also be set at different values to obtain different channel current if desired. However, the total channel current is advised not to excee d a total of 1,500mA with hard-limit to 750mA maximum for each channel. Figure 3 describes how designer can use AL1772+AL1782 to drive more than two channel LEDs, specially in this case, to drive White+RGB LEDs for color mixing application. The AL1772 PFC CV stage produces three voltage outputs for white and RGB LED connections. 25V is used to connect with White LED Anode, 12V is for Green and Blue LEDs, and 8V is for Red LED. The White LED and Red LED cathodes are connected with AL1772 channel 1 and channel 2 respectively, and th e Green and Blue LED cathodes are connected with AL1782 channels. In Figure 3, AL17050 high voltage BUCK converter is used to produce MCU power supply voltage 3.3V for high efficiency and low s tandby power considerations.
Document number: DS41314 Rev. 1 - 2 17 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Application Information (Cont.) (5) Support Higher Current While the recommended maximum ILED1 and ILED2 are at 750mA for AL1772, by setting R SET1 and RSET2 at 4kΩ, the system design can drive an LED string with higher current by connecting the cathodes of the LED emitter string to two or more LED channel outputs (LEDx) and associated PWM pins (PWMx) with the same PWM signal from the MCU. The result current through the LED emitter string is the sum of each current through the individual channels. Similarly, it is also possible to further increase the curren t for a specific channel by connecting two or more AL177 1/1772 IC chips in parallel and drive all associated PWM pins with a common PWM signal. (6) Special System Design Considerations Three key Smart Light Bulb system design issues need to b e carefully planned for system efficiency consideration. Any headroom voltage (over total voltage drops for all LED emitters in a string) in each channel will result in additional power consumption for AL1771/1772, which needs to be dissipated by AL1771/1772. System designers are advised to carefully plan for well forward-voltage-matched LED str ings with Constant Voltage (CV) regulators to ensure that AL1771/1772 can properly dissipate heat for normal operations. VF Matching for Emitter Strings: It is crucial to match the total forward voltage drop (VF) of each LED string attached to a CV for optimal system efficiency. Multiple CVs to Match Emitter Module Design: The PFC Power Conversion block may need to support multiple CV outputs to power all emitter strings in a Smart Light Bulb design. Overall Thermal Management: Though there are various protection mechanism built-in AL17 71/1772, it is good practice to check maximum dimming pa ttern to avoid Thermal Shutdown (when AL1771/1772 junction temperature exceeds +160ºC). Thermal resistivity θJA (Junction-to-Ambient) of AL1771/1772 is 50 ºC/Watt. AL1771/1772 has to absorb any additional voltage headroom provided by the voltage input to the emitter strings. Therefore, thermal management of AL1771/1772 must follow the following guidelines: PDmax (Maximum Power Dissipation of AL1771/1772 ) = (160ºC Junction Shutdown Temperature - Ambient Tempera ture, e.g. 85ºC) / 45ºC/W = 1.5Watts PAmax (Power to be Absorbed by AL1771/1772) = Σ(VLEDx * Current through the emitter string * Associated PWM Dimming Duty Cycle) for all channels Thermal Management Guideline PAmax < PDmax
Document number: DS41314 Rev. 1 - 2 18 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772
Ordering Information
1 : AL1771 Package T16E : TSSOP-16EP (Type DX) 13 : 13" Tape & Reel 2 : AL1772 Part Number Package Code Packaging (Note 6) 13” Tape and Reel Quantity Part Number Suffix AL1771T16E-13 T16E TSSOP-16EP (Type DX) 2500/Tape & Reel -13 AL1772T16E-13 T16E TSSOP-16EP (Type DX) 2500/Tape & Reel -13 Note 6: For packaging details, go to our website at https://www.diodes.com/design/suppo rt/packaging/diodes-packaging/. Marking Information (1) TSSOP-16EP (Type DX) ( Top View ) AL177X YY WW X X E Logo Part Number AL1771 AL1772 WW : Week : 01~52; 52 YY : Year : 15,16,17~ X X : Internal Code represents 52 and 53 week 16 9 E : TSSOP-16EP (Type DX)
Document number: DS41314 Rev. 1 - 2 19 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. TSSOP-16EP (Type DX) 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 Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. TSSOP-16EP (Type DX) C Y X Notes: 7. The suggested land pattern dimensions have been provided fo r reference only, as actual pad layouts may vary depending on application. These dimensions may be modified based on user equipment capability or fabrica tion criteria. A more robust pattern may be desired for wave soldering and is calculated by adding 0.2 mm to the ‘Z’ dimension. For further information, please reference document IPC-7351A, Naming Convention for Standard SMT Land Patterns, and for International grid details, please see doc ument IEC, Publication 97. 8. For high voltage applications, the appropriate industry sector guide lines should be considered with regards to creepage and clearance d istances between device Terminals and PCB tracking. 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 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
Document number: DS41314 Rev. 1 - 2 20 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Minimum Packing Quantity (Notes 9, 10, 11) — Quantity Tape Width Part Number Suffix 13” Reel 2,500 12mm -13 Notes: 9. Package quantities given are for minimum packaging quantity onl y, not minimum order quantity. For minimum order quantity, please contac t Sales department. 10. No mixed date codes or partial quantity (less than minimum packaging quantity) per packaging is allowed. 11. In no case shall there be two or more consecutive components missing fr om any reel for any reason. Device Tape Orientation (Notes 12, 13) Tape Width Part Number Suffix Tape Orientation 12mm -13 Pin 1 Notes: 12. For part marking, refer to product datasheet. 13. Tape and package drawings are not to scale and are shown for de vice tape orientation only. Embossed Carrier Tape Specifications Ø D1t B0B1 E F W P2 P0 P Ø D 10 pitches cumulative tolerance on tape +/-0.2mm Direction of Feed Center lines of cavity Tape Width (W) Dimension Value (mm) Dimension Value (mm) Dimension Value (mm) 12mm B1 6.30 K0 1.60 t 0.30 ±0.05 D1 1.50 min P 8.0 ±0.10 — — A0 B0 K0 The clearance between the component and the cavity must comply to the rotational and lateral movement requirement provided in figures in the "Maximum Component Movement in Tape Pocket” section. Direction of feed
Document number: DS41314 Rev. 1 - 2 21 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Embossed Carrier Tape Specifications (Cont.)
Document number: DS41314 Rev. 1 - 2 22 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Maximum Component Movement in Tape Pocket
Document number: DS41314 Rev. 1 - 2 23 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 Surface Mount Reel Specifications G Full Radius [Measured at hub] * Drive spokes optional. If used, dimensions with asterisks apply. A C N T Tape Width Reel Size A (mm) B Max (mm) C (mm) D Max (mm) N Min (mm) G (mm) T Max (mm) Tape Leader and Trailer Specifications (Notes 14, 15) User Direction of Feed Min. 390mm Carrier Tape Sealed with Cover Tape Top Cover Tape Min. 160mm Min. 160mm Trailer Tape (No Components) Leader Tape (No Components) END START Notes: 14. There shall be a leader of at least 230mm which may consist o f carrier tape and/or cover tape or a start tape followed by at least 1 60mm of empty carrier tape sealed with cover tape. 15. There shall be a trailer of at least 160mm of empty carrier tap e sealed with cover tape. The entire carrier tape must release from th e reel hub as the last portion of the tape unwinds from the reel without damage to the carrie r tape and the remaining components in the cavities.
Document number: DS41314 Rev. 1 - 2 24 of 24 www.diodes.com August 2018 © Diodes Incorporated NEW PRODUCT AL1771/1772 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRE SS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ME RCHANTABILITY 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, correct ions or other changes without further notice to this document and any produ ct described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product des cribed herein; neither does Diodes Incorporated convey a ny license under its patent or trademark rights, nor the rights of others. Any Custome r or user of this document or products described here in in such applications shall assume all risks of such use and will agree to hold Diodes Incorpo rated and all the companies whose products are repres ented 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 arising 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. Pro duct 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 in to multiple languages for reference. Only the English vers ion 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 dev ices 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 perfor m when properly used in accordance with instructions for u se provided in the labeling can be reasonably expected to result in sig nificant 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 lif e 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-criti cal, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorpo rated. Further, Customers must fully indemnify Diodes Incor porated 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 © 2018, Diodes Incorporated www.diodes.com