DIODES AL1698EV1 Buck Boost LED Driver Converter User Guide
- July 16, 2024
- DIODES
Table of Contents
DIODES AL1698EV1 Buck Boost LED Driver Converter User Guide
General Description
This demonstration board utilizes the AL1698 Buck-boost LED driver converter
with single winding inductor providing a cost-effective trial dimmable
solution for offline high brightness LED applications. This user-friendly
evaluation board provides users with quick connection to their different types
of LED strings. 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 describe 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 >85%
- 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 | 8.1W |
| LED Current | 100mA |
| LED Voltage | 81V |
| Power Factor | >0.9 |
| Efficiency | 85% |
| XYZ Dimension | 63.4 x 21 x 18mm |
| ROHS Compliance | Yes |
**Evaluation Board
Figure 1: Top View
Figure 2: Bottom View
**
Connection Instructions:
AC-L Input: White-Line
AC-N Input : White-Neutral
DC LED+ Output: LED+ (Red)
DC LED- Output: LED- (Black)
Board Layouts
Figure 4: PCB Layout Bottom View
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 AL1698 is a non-isolated design. All terminals carry high voltage during operation!
**Schematic
**
Transformer Design
Bobbin and Core
EE13 Vertical 5+5 pin
Transformer Parameters
- Primary Inductance (Pin8-Pin10, all other windings open)： Lp=2.4mH, ±5%@1kHz
- Primary Winding Turns (Pin8-Pin10): NP=248Ts
- Varnish the complete assembly
**Transformer Winding Construction Diagram
**
| Item | Winding name | Description |
|---|---|---|
| 1 | WD1-Primary Winding | Start at Pin 8, Wind 248 turns of Φ0.21mm wire and |
finish on Pin 10
2| Insulation| 2 Layers of insulation tape
Bill of Material
| # | Item | Description | Package | Quantity |
|---|---|---|---|---|
| 1 | C1 | 33nF/400V, CL21, Pitch=7.5mm | Through-hole | 1 |
| 2 | C2 | 100nF/400V, CL21, Pitch=7.5mm | Through-hole | 1 |
| 3 | C3 | 47nF/400V, CL21, Pitch=7.5mm | Through-hole | 1 |
| 4 | C4 | Ceramic Cap, 0.1uF/25V,X7R | 0805 | 1 |
| 5 | C5 | E-Cap,130℃,3.3uF/50V,5*9mm | Through-hole | 1 |
| 6 | C6 | Ceramic Cap, 0.47uF/25V,X7R | 0805 | 1 |
| 7 | C7 | E-Cap,130℃,100uF/100V,10*16mm | Through-hole | 1 |
| 8 | C8 | E-Cap,130℃,4.7uF/100V, 5*9mm | Through-hole | 1 |
| 9 | BD1 | Rectifier Bridge,MB10S,0.8A/1KV,Diodes Inc | MBS | 1 |
| 10 | D1 | Fast Recovery Diode,US1J,1A/600V,Diodes Inc | SMA | 1 |
| 11 | D2 | Switching diode, 1N4148,Diodes Inc | SOD-123 | 1 |
| 12 | ZD1, ZD2 | DDZ9688,4.7V Zener, Diodes Inc | SOD-123 | 2 |
| 13 | VR1 | Varistor, 07D431 | Through-hole | 1 |
| 14 | RF1 | Fuse Resistor,51R, 5%, 1W | Through-hole | 1 |
| 15 | RF2 | Fuse Resistor,51R, 5%, 1W | Through-hole | 1 |
| 16 | R1 | Resistor, 4.7K, 5%, 1/8W | 0805 | 1 |
| 17 | R2 | SMD Resistor,390R, 5%, 1W | DIP | 1 |
| 18 | R3 | SMD Resistor,130K, 5%, 1/8W | 0805 | 1 |
| 19 | R4 | SMD Resistor,11K, 5%, 1/8W | 0805 | 1 |
| 20 | R5 | SMD Resistor,3.9R, 1%, 1/8W | 0805 | 1 |
| 21 | R6 | SMD Resistor,4.3R, 1%, 1/8W | 0805 | 1 |
| 22 | R7 | SMD Resistor,100K, 5%, 1/4W | 1206 | 1 |
| 23 | R8 | SMD Resistor,10K, 5%, 1/8W | 0805 | 1 |
| 24 | R9 | SMD Resistor,4.7K, 5%, 1/8W | 0805 | 1 |
| 25 | RJ | SMD Resistor,0R, 5%, 1/4W | 1206 | 1 |
| 26 | L1 | Drum Inductor 4.7mH, 6*8mm | Through-hole | 1 |
| 27 | L2 | EE13, Vertical, 5+5pin,Single Winding,2.4mH | Through-hole | 1 |
| 28 | Q1 | N-MOS,DMG3420U, 20V/4A,Diodes Inc | SOT-23 | 1 |
| 29 | U1 | AL1698-20C,Diodes Dimmable IC | SOP-7 | 1 |
| Total | 30 |
Electrical Performance
Dimming Test
Dimmer compatibility and dimming range
**Num| ****Dimmer Type| ILED(mA)| Dimming
Percentage(%)| Flicker or not
---|---|---|---|---
Min| Max| Min| Max**
1| Gira 030700 T 20-525W| 23.33| 100.89| 22.24| 96.18| No
2| PEHA D 80 433VL60-300W| 27.58| 102.26| 26.29| 97.48| No
3| Merten 5771-99 T 20-315W| 31.39| 100.28| 29.92| 95.60| No
4| ABB STD 50-3 L 60-500W| 27.25| 102.73| 25.98| 97.93| No
5| Busch Jaeger 6513U-102 T 40-420W| 27.00| 103.16| 25.74| 98.34| No
6| Busch Jaeger 6523U-LED L 2-100W| 11.98| 99.46| 11.42| 94.81| No
7| Berker 2875 L 60-600W| 16.16| 101.89| 15.41| 97.13| No
8| Legrand 775903 T 420W| 44.12| 101.45| 42.06| 96.71| No
9| Siemens 5TCB 284 T 20-525W| 23.15| 103.81| 22.07| 98.96| No
10| Gira 117600 U 50-420W| 33.68| 101.10| 32.11| 96.38| No
11| Busch-Jae 2247U L 500W| 3.96| 102.65| 3.78| 97.86| No
12| He T46 T 20-315W| 31.91| 102.49| 30.42| 97.70| No
13| Berker 2861 10 U50-420W| 32.99| 102.04| 31.45| 97.27| No
14| Jung 254 UDIE1 U50-420W| 33.48| 100.98| 31.92| 96.26| No
15| Everflourish EFM700DC T 25-150W| 30.18| 98.78| 28.77| 94.17| No
16| IKEA E0902-DIM L25-150W| 10.45| 102.67| 9.96| 97.87| No
17| Busch-Jaeger 2200 L60-400W| 26.40| 99.59| 25.17| 94.94| No
18| Jung 1254 UDE U50-420W| 0.00| 100.46| 0.00| 95.77| No
19| Gira 030200/I01 L60-600W| 0.00| 100.69| 0.00| 95.99| No
20| ELSO ATD315 T40-315W| 27.44| 102.82| 26.16| 98.02| No
21| IKEA EED100PRS| 0.00| 100.46| 0.00| 95.77| No
22| IKEA EED200LRS(W)| 0.00| 100.69| 0.00| 95.99| No
23| IKEA EED200BRS| 2.00| 101.12| 1.91| 96.40| No
24| IKEA EED200LRS(B)| 0.00| 97.63| 0.00| 93.07| No
Dimming Curve
Functional Waveform
Thermal Test
EMI Conduction Test
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