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AL1663RS-13
Diodes Incorporated
IC LED DRIVER OFFL PWM 8SO
32276 Pcs New Original In Stock
LED Driver IC 1 Output AC DC Offline Switcher Flyback, Step-Down (Buck), Step-Up (Boost) Analog, PWM Dimming 8-SO
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5.0 / 5.0
- (163 Ratings)
AL1663RS-13
Product Overview
3317256
DiGi Electronics Part Number
AL1663RS-13-DGManufacturer
Diodes Incorporated
AL1663RS-13
Description
IC LED DRIVER OFFL PWM 8SOInventory
32276 Pcs New Original In Stock
LED Driver IC 1 Output AC DC Offline Switcher Flyback, Step-Down (Buck), Step-Up (Boost) Analog, PWM Dimming 8-SO
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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AL1663RS-13 Technical Specifications
Category
Power Management (PMIC), LED Drivers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Obsolete
Type
AC DC Offline Switcher
Topology
Flyback, Step-Down (Buck), Step-Up (Boost)
Internal Switch(s)
No
Number of Outputs
1
Voltage - Supply (Min)
7V
Voltage - Supply (Max)
30V
Voltage - Output
20V
Current - Output / Channel
-
Frequency
150kHz
Dimming
Analog, PWM
Applications
Backlight, Lighting
Operating Temperature
-40°C ~ 105°C (TA)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SO
Base Product Number
AL1663
Datasheet & Documents
HTML Datasheet
AL1663RS-13-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
AL1663RS-13DIDKR
AL1663RS-13DICT
AL1663RS-13DITR
Standard Package
4,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
L’expédition a été très rapide et l’emballage sécurisé m’ont vraiment convaincu.
December 02, 2025
La variété des choix proposés par DiGi Electronics facilite grandement notre préparation pédagogique.
December 02, 2025
Livraison très rapide et support client toujours prêt à aider. Parfait!
December 02, 2025
Their team handled my concerns efficiently, demonstrating genuine care and expertise.
December 02, 2025
I trust DiGi Electronics for consistent quality that helps me bring my ideas to life.
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Frequently Asked Questions (FAQ)
If my 24 VAC landscape-lighting design currently uses an obsolete AL1663RS-13 in a buck fly-burst board, can I simply drop in AL1665S-13 without touching the MOSFET and still pass 1 kV surge ring-wave per IEC-61000-4-5?
No—AL1665S-13 integrates a 650 V power MOSFET that is NOT present in AL1663RS-13, so the external FET pads become NC. You must remove your FET, re-wire the drain node, and verify that the integrated MOSFET’s R_DS(on) (≈8 Ω) does not push conduction losses past the thermal limit at 105 °C ambient. Re-run your surge test: the internal clamp is rated 750 V, so add a 100 V TVS on VCC to buy ≥1 kV margin and keep the transformer leakage inductance under 3 % to limit spike amplitude.
Lay-out team wants to shrink our AL1663RS-13 five-string LED driver from 4-layer to 2-layer to save cost; what copper thickness, valley-fill, and via stitching rules will keep 150 kHz switching noise below CISPR-15 Class B at 230 VAC?
Keep the critical loops inside the top layer: FET drain-to-cathode of the freewheel diode, and current-sense resistor back to GND. Use 2 oz copper top-side, 1 oz bottom as ground flood only. Place a 2 W, 1 MΩ bleeder across bulk cap to lower CM impedance valley-fill. Stitch every 3 mm around the switch node with 0.3 mm vias, but do NOT connect them to the inner layer—lack of shield means you rely on common-mode choke (≈5 mH) in the AC inlet. Add 470 pF Y-cap from secondary LED- to earth; this normally knocks 3–5 dB off the 150 kHz fundamental and keeps you 6 dB under the limit.
We have 42 °C sealed-box street-light fixtures and the AL1663RS-13 datasheet only guarantees 105 °C ambient; how do I calculate LED lifetime derating when case temp reaches 108 °C on the 8-SOIC body?
AL1663RS-13’s silicon is qualified to 150 °C junction; with θ_JA ≈ 130 °C/W in still air you hit T_j ≈ 129 °C at T_a = 108 °C, still inside abs-max. However, lifetime halves ≈ every 10 °C above 105 °C. Estimate 8 kh @ 105 °C → 4 kh @ 115 °C equivalent → ~3 kh in your 108 °C box. If the fixture spec is >50 kh, clamp the IC to the aluminium housing with an e-clip and add 20 mm² copper pour on the top layer; this drops θ_JA to 80 °C/W and pushes lifetime above 8 kh.
Buyer shipped us AL1663RS-13 Cut-Tape parts with MSL-1 label but no factory vacuum seal; after 30 days in 60 %RH Asian warehouse, will reflow pop-corning be an issue for 8-SOIC and can I still use them for high-humidity 85 °C/85 %RH reliability tests?
MSL-1 means the epoxy is practically immune to moisture absorption; popping is improbable even after 1 year at 60 %RH. For 85 °C/85 %RH 1000 h HALT, pre-bake 125 °C/24 h anyway to drive off surface moisture and avoid test-floor contamination. Dry-ship the boards immediately after soldering; expect <0.1 % parametric shift in oscillator frequency, so no re-tune of the 150 kHz snubber is required.
TI suggests TPS92075DR/NOPB as substitute for obsolete AL1663RS-13; what magnetics redesign is mandatory when my present 700 µH, 1:1 flyback transformer was tuned for 150 kHz valley-switching and the TI part wants 300 kHz quasi-resonant?
Halve the primary inductance to 350 µH to keep the same ΔI at double frequency, but core loss will rise ~×4. Choose a 0.25 mm gap on an RM6 3C96 core to stay below 100 mW at 110 °C. Re-calculate reflected voltage: AL1663RS-13’s 20 V clamp becomes 40 V with TPS92075DR/NOPB, so reset your turns-ratio to 0.5, add 30 % secondary copper, and verify diode reverse-recovery <25 ns to avoid QR valley mis-trigger. Finally, the TI device lacks analog dimming pin; move your 0–1.8 V rail to the PWM dim input and low-pass with 1 kΩ/1 µF to recreate smooth DC control within 1 % ripple.
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AL1663RS-13 CAD Models
Diodes Incorporated AL1663RS-13 PCB symbols & footprints
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