IX9908-EVAL IXYS

IX9908 Triac-Dimmable Evaluation Board Users Guide INTEGRATED CIRCUITS DIVISION 1. Introduction WARNING This demonstration board must be powered through an isolation transformer before connecting any external AC instrumentation IXYS Integrated Circuits Divisions IX9908 Evaluation Board contains all the necessary circuitry to demonstrate the features of the IX9908 single-stage flyback controller in a triac dimmable, high power factor LED driver. The IX9908 IC architecture includes quasi-resonant primary control with an integrated high voltage startup cell. This evaluation board features high power factor, high efficiency and outstanding dimming performance. 1.1 Features: TRIAC dimmer compatible, no output flicker or pop-on Fast startup High efficiency >85% Low cost, low component count Open string protection High power factor > 0.9 Digital soft-start Cycle-by-cycle peak current control Figure 1. IX9908 Evaluation Board, Top View 2. Power Supply Specifications Parameter Symbol Range Units V Input Voltage V IN 90-135 AC Input Frequency f-line 60 Hz V Output Voltage 19-26 V out I Output Current 450-600 mA out Efficiency - 85-86 % Power Factor - 0.92 min - IX9908-UG R01 www.ixysic.com 1IX9908 Evaluation Board Users Guide INTEGRATED CIRCUITS DIVISION Figure 2. IX9908 Evaluation Board Schematic 2 www.ixysic.com R01 C12 1.0n L1 L3 R2 1 2 21 J2-2 1 2 J1-1 1mH 4 2 D5 1mH C8 T1PIN6 10 C6 R6 STPS3150U 1.5n R15 D3 T1-A NTC 0.22 221k 1/4W-up SMB 1206 1 C4 510 1 1k 1/4W-up 2 0.22 C14 + C2 R1 1 R14 D1 270 0.1 330F LEDs T1-C AC INPUT 1N4007GP 20k R3 0603 10MM-TH 0.1 C3 D0-41 2 3 3 C1 0.033 L2 T1-B F1 1 2 J1-2 4 T1PIN5 1mH J2-1 R12 211 2 V 1k R5 R4 CC 523k 523k U1 1 8 ZCV GND 2 7 VR VCC 4 3 6 CS NC D 2 4 5 GD HV Q2 2 1 1 IPD60R1K4C6 G DPAK R13 S 3 C5 V 10 CC 1000pF 10X2.5mm 1 1 Q1 R17 R16 BC857B 1 5.11k 1.21 2 SOT23 R8 2 E 2 20.0k 2 1 1 2 B R10 3 1 1 C 1 82.5k 1 C11 C9 SOD323 SOD323 R7 D7 2 R9 0.01 330P MM3Z15VT1G MM3Z4V7T1G 3.32k BAS16 12.4k 0603 0603 D4 D2 2 2 SOD323 2 1 2 V CC 1 R19 10 2 2 1 2 1 2 1 E4 E1 R11 BAS16 R18 C13 + 162k SOD323 10 C7 C10 4.7 22 0.1 E3 E2 5MM-TH 0603