XR46084ESFTR-ADJ

iML8684 Three Terminal Current Controller General Description Features The iML8684 is a Three Terminal Current Controller (TTCC) for regulating the current flowing through an LED string. The application of the iML8684 is configured in parallel with an LED string. The iML8684 can work as voltage controlled current source, current regulator, or cut-off. It is suitable for the applications adopting periodical AC voltage source. The PCB layout is also very flexible to meet various shape requirements. It is especially suitable for replacing incandescent light bulb and linear type fluorescent lamp.  System - All solid state components. No electrolytic capacitor required. Compact size to minimize mechanical cost. Driver-on-board and chip-on-board available which minimize process flow and assembly cost. High PF and Low THD performance. High efficiency achieved. Flexible PCB layout style. Wide range of LED forward voltage selection. Distributed heat to several chips. TRIAC dimmable.  Chip - 88V input sustaining voltage. - TTP, the peak regulating current decreases linearly to around 50% at 175°C. IAK IPEAKx ITP 0 © 2014 Exar Corporation. TTP TTSD (130°C) (175°C) TJ 8684DOC rev 1.1 6 iML8684 Three Terminal Current Controller Application Circuit (1) 220VAC/ 10W LED Light Engine - 3 steps, PF=0.98, THD=16% - To pass 1KV surge test, Q1 can be changed to 800V NMOS. iLED iLED VAC LED1 134V 60mA RBL 90KΩ BD BD LED2 67V 60mA U1 iML8684ADJ (Mode 2) LED3 67V 60mA U2 iML8684ADJ MS1 MS2 K MS1 MS2 K Rz2 270KΩ © 2014 Exar Corporation. U3 iML8684ADJ MS1 MS2 K MS1 MS2 K C2 Option ZD 24V CS NC A CS NC A (Mode 0) R2 5.1Ω 1A/ 600 NMOS 1A/ 600 NMOS U3 iML8684-C2 LED3 67V 60mA Q1 iML3160 Q1 iML3160 ZD 24V R1 7.5Ω Rz1 270KΩ (Mode 1) Rz2 270KΩ LED2 67V 60mA CS NC A CS NC A U2 iML8684-C2 MS1 MS2 K MS1 MS2 K Rz1 270KΩ LED1 134V 60mA RBL 90KΩ CS NC A CS NC A U1 iML8684-C2 VAC R3 3.9Ω ADJ Options 8684DOC rev 1.1 7 iML8684 Three Terminal Current Controller (2) 10W LED Light Engine - 3 steps, PF=0.98, THD=16% - To pass 1KV surge test, Q1 can be changed to 800V NMOS. iLED iLED VAC LED1 72V 120mA RBL 47KΩ BD BD LED2 36V 120mA U1 iML8684ADJ (Mode 2) LED3 36V 120mA U2 iML8684ADJ MS1 MS2 K MS1 MS2 K Rz2 180KΩ © 2014 Exar Corporation. U3 iML8684ADJ MS1 MS2 K MS1 MS2 K D2 Option ZD 18V CS NC A CS NC A (Mode 0) R2 3.3Ω 1A/ 600 NMOS 1A/ 600 NMOS U3 iML8684-D2 LED3 36V 120mA Q1 iML3160 Q1 iML3160 ZD 18V R1 4.7Ω Rz1 180KΩ (Mode 1) Rz2 180KΩ LED2 36V 120mA CS NC A CS NC A U2 iML8684-D2 MS1 MS2 K MS1 MS2 K Rz1 180KΩ LED1 72V 120mA RBL 47KΩ CS NC A CS NC A U1 iML8684-D2 VAC R3 2.4Ω ADJ Options 8684DOC rev 1.1 8 iML8684 Three Terminal Current Controller Package Information DFN– 2mmx2mm– 6L D E A A3 b 1 D1 e SYMBOLS MIN. NOM. MAX. A 0.70 0.75 0.80 A1 0.00 0.02 0.05 A3 - 0.20 - b 0.20 0.30 0.35 D - 2.00 - D1 - 1.20 - E - 2.00 - E1 - 0.70 - e - 0.65 - K 0.20 - - L - 0.30 - UNIT: MILLIMETERS E1 K L A1 Footprint Suggestion X Y B A C P D  JA © 2014 Exar Corporation. SYMBOLS Footprint Dimension A 2.80 B 1.20 C 0.80 D 0.35 P 0.65 X 1.40 Y 0.70 103 C / W 8684DOC rev 1.1 9 iML8684 Three Terminal Current Controller SOT-89-5L D A b D1 L E1 E b1 L b e c e1 SYMBOLS MIN. MAX. A 1.40 1.60 b 0.32 0.52 b1 0.36 0.56 c 0.35 0.44 D 4.40 4.60 D1 1.40 1.80 E 2.30 2.60 E1 3.94 4.25 e 1.50 TYP e1 2.90 3.10 L 0.90 1.10 UNIT: MILLIMETERS Footprint Suggestion D1 D SYMBOLS Footprint Dimension A 5.20 D2 C θ B2 B A B1 D θ C P1 P2 4.80 3.60 B2 0.25 C 1.35 D 0.70 D1 1.90 D2 1.30 M 3.70 P1 1.50 P2 3.00 θ M 45° UNIT: MILLIMETERS  JA © 2014 Exar Corporation. B B1 127.5 C / W 8684DOC rev 1.1 10 iML8684 Three Terminal Current Controller Records of Revisions Rev. Date Page 1.0 Nov. 13, 2014 All First release. Dec. 19, 2014 3 6 7, 8 11 All Update the Block Diagram and I-V Curve. Update the Notes. Add the Application Circuits. Add Records of Revision Change the LOGO. 1.1 © 2014 Exar Corporation. Description 8684DOC rev 1.1 11