DIODES AL1698KEV2 Dimmable LED Driver User Guide
- May 15, 2024
- DIODES
Table of Contents
AL1698KEV2 User Guide
230VAC Dimmable LED Driver
General Description
This demonstration board utilizes the AL1698K Boost LED driver-converter with
a single winding inductor providing a costeffective triac dimmable solution
for offline high brightness LED applications. This userfriendly evaluation
board provides users with quick connection to their different types of LEDs
string. The demonstration board can be modified easily to adjust the LED
output current and the number of series connected LEDs that are driven.
A BOM, schematic and layout are included that describes the parts used on this
demonstration board, along with measured performance characteristics. These
materials can be used as a reference design.
Key Features
- Triac Dimmable
- Active PFC with power factor >0.9
- High efficiency >93%
- Single winding
- Low THD
- Good dimmer compatibility
- Low BOM cost
Applications
- Retrofit Bulb, Par Lamps
Specifications
| Parameter | Value |
|---|---|
| AC Input Voltage | 198~264V |
| Output Power | 8.4W |
| LED Current | 20mA |
| LED Voltage | 420V |
| Power Factor | >0.9 |
| Efficiency | 94.40% |
| XYZ Dimension | 57x 28 x 20mm |
| ROHS Compliance | Yes |
Evaluation Board
Connection Instructions:
AC-L Input: White-Line
AC-N Input: White-Neutral
DC LED+ Output: LED+ (Red)
DC LED- Output: LED- (Black)
Board Layouts
Quick Start Guide
- Preset the isolated AC source to 230VAC.
- Ensure that the AC source is switched OFF or disconnected.
- Connect the anode wire of the LED string to the LED+ terminal of the evaluation board.
- Connect the cathode wire of the LED string to the LED- terminal of the evaluation board.
- Connect two AC line wires to the AC-L and AC-N terminals on the evaluation board.
- Ensure that the area around the board is clear and safe, and preferably that the board and LEDs are enclosed in a transparent safety cover.
- Turn on the main switch. LED string should light up with LED.
DO NOT TOUCH THE BOARD, LEDs OR BARE WIRING.
Caution: The AL1698K is a non-isolated design. All terminals carry high voltage during operation!
Schematic
Transformer Design
Bobbin and Core
EE10 Vertical 4+4 pin
Transformer Parameters
- Primary Inductance (Pin4-Pin8, all other windings open)：Lp=12.0mH, ±5%@1kHz
- Primary Winding Turns (Pin4-Pin8): NP=340Ts
- Varnish the complete assembly
Transformer Winding Construction Diagram
| Item | Winding name | Description |
|---|---|---|
| 1 | WD1-Primary Winding | Start at Pin 4, Wind 340 turns of Φ0.15mm wire and |
finish on Pin 8
2| Insulation| 2 Layers of insulation tape
Bill of Material
| # | Item | Description | Package | Quantity |
|---|---|---|---|---|
| 1 | C1 | 22nF/400V, CL21, Pitch=7.5mm | DIP | 1 |
| 2 | C2 | 47nF/400V, CL21, Pitch=7.5mm | DIP | 1 |
| 3 | C3 | 120nF/400V, CL21, Pitch=7.5mm | DIP | 1 |
| 4 | C4 | Ceramic Cap,4.7µF/25V,X7R | 0805 | 1 |
| 5 | C5 | Ceramic Cap,1µF/25V,X7R | 0805 | 1 |
| 6 | C6 | E-Cap,130℃,1µF/450V,6.3*11mm | DIP | 1 |
| 7 | C7 | E-Cap,130℃,15µF/450V,12.5*16mm | DIP | 1 |
| 8 | C8 | Ceramic Cap,4.7µF/25V,X7R | 0805 | 1 |
| 9 | C9 | Ceramic Cap,100nF/25V,X7R | 0805 | 1 |
| 10 | C10 | Ceramic Cap,2.2nF/25V,X7R | 805 | 1 |
| 11 | BD1 | Rectifier Bridge,HDS10M,1A/1KV,Diodes | ||
| Incorporated (Diodes) | HDS | 1 | ||
| 12 | D1 | Fast Recovery Diode,ES1J,1A/600V,Diodes | SMA | 1 |
| 13 | D2 | Switching diode, 1N4148ws,Diodes | SOD-323 | 1 |
| 14 | Z1,Z2 | BZT52C4V7S,4.7V Zener, Diodes | SOD-323 | 2 |
| 15 | Z3 | BZT52HC24WF,24V Zener, Diodes | SOD-123 | 1 |
| 15 | Z4 | BZT52C15S,15V Zener, Diodes | SOD-323 | 1 |
| 16 | RF1 | Fuse Resistor,4R7, 5%, 1W | DIP | 1 |
| 17 | RF2，RF3 | Fuse Resistor,150R, 5%, 1W | DIP | 1 |
| 18 | R1 | Resistor, 5.1K, 5%, 1/8W | 0805 | 1 |
| 19 | R2 | SMD Resistor,470R, 5%, 2W | DIP | 1 |
| 20 | R3 | SMD Resistor,20R, 1%, 1/8W | 0805 | 1 |
| 21 | R4 | SMD Resistor,20R, 1%, 1/8W | 0805 | 1 |
| 22 | R5,R6 | SMD Resistor,3.6M, 5%, 1/4W | 1206 | 2 |
| 23 | R7 | SMD Resistor,27K, 5%, 1/8W | 0805 | 1 |
| 24 | R8,R9 | SMD Resistor,4.7M, 1%, 1/4W | 1206 | 2 |
| 25 | R10 | Resistor, 130K, 5%, 1/8W | 0805 | 1 |
| 26 | R11 | SMD Resistor,4.3M, 1%, 1/4W | 1206 | 1 |
| 27 | R12 | SMD Resistor,2.0M, 1%, 1/4W | 1206 | 1 |
| 28 | R13 | SMD Resistor,150K, 5%, 1/8W | 0805 | 1 |
| 29 | R14,R15 | SMD Resistor,5.1K, 5%, 1/8W | 0805 | 0 |
| 25 | RJ1 | SMD Resistor,0R, 5%, 1/4W | 1206 | 1 |
| 25 | RJ2 | NC | 1206 | 0 |
| 26 | L1,L2 | 4.7mH, 6*8mm,WURTH Elektronik | DIP | 2 |
| 27 | L3 | EE10, Vertical, 4+4pin,Single Winding,12mH | DIP | 1 |
| 28 | Q1 | N-MOS,DMG3420U, 20V/4A,Diodes | SOT-23 | 1 |
| 28 | Q2 | CS4N60 4A/600V | TO-251 | 1 |
| 29 | U1 | AL1698K-20C,Diodes Dimmable IC | SOP-7 | 1 |
| Total | 39 |
Electrical Performance
Dimming Test
Dimmer compatibility and dimming range
Number| Dimmer Type| ILED(mA)| Dimming Percentage(%)|
Flicker or not
---|---|---|---|---
M in| Max| Min| Max
1| Gira 030700 T 20-525W| 4.3751| 18.888| 23| 99| No
2| PEHA D 80 433VL60-300W| 1.5739| 18.085| 8| 95| No
3| Merten 5771-99 T 20-315W| 6.5815| 19.045| 34| 100| No
4| ABB STD 50-3 L 60-500W| 1.1555| 18.406| 6| 96| No
5| Busch Jaeger 6517U-101| 1.7499| 18.076| 9| 94| No
6| Busch Jaeger 6513U-102 T 40- 420W| 4.6418| 18.564| 24| 97| No
7| Busch Jaeger 6523U-LED L 2- 100W| 0.0004| 18.319| 0| 95| No
9| Berker 2875 L 60-600W| 0.284| 18.489| 1.5| 96| No
10| Legrand 775903 T 420W| 3.0453| 18.344| 1| 95| No
11| Jung 225 NVDE| 1.7059| 18.234| 9| 95| No
12| Siemens 5TCB 284 T 20-525W| 3.9711| 18.733| 21| 97| No
13| Busch-Jae 2247U L 500W| 1.6594| 18.244| 9| 95| No
15| IKEA E0902-DIM L25-150W| 1.5005| 18.404| 8| 96| No
16| Busch-Jaeger 2200 L60-400W| 0.351| 18.392| 2| 96| No
Dimming Curve
Functional Waveform
Thermal Test
EMI Conduction Test
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AL1698KEV2
February 2024
Issue 1
www.didoes.com
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