XR Three Terminal Current Controller. Description. Typical Application

Transcription

1 Three Terminal Current Controller Description The XR46084 is a Three Terminal Current Controller (TTCC) for regulating the current flowing through an LED string. The application of the XR46084 is configured in parallel with an LED string. The XR46084 can work as voltage controlled current source, current regulator, or cut-off. It is suitable for the applications adopting periodical C voltage source. The layout is very flexible allowing for PCB designs in any conceivable shape. Whether high bay, downlights, or unique architectural shapes the XR46084 can provide an excellent LED lighting solution. Typical pplication 120VC BD ILED U0 XR46084-DJ R0 LEDS1 FETURES System ll 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 TRIC dimmable Chip 88V input sustaining voltage < 3V dropout voltage for up to 150m regulating current PPLICTIONS LED Lighting pplications Downlight High bay Specialty rchitectural R4 U1 XR46084-DJ LEDS2 R1 R5 U2 XR46084-DJ LEDS3 R2 Rectified V C Q1 XR46000 ZD U3 XR46084-DJ R3 I LED t t Figure 1. Typical pplication Figure 2. Typical Performance 1/14

2 bsolute Maximum Ratings Stresses beyond the limits listed below may cause permanent damage to the device. Exposure to any bsolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Sustaining voltage to V to 88V Sustaining voltage,, to V to 1V Regulating current m Maximum operating junction temperature, T J C Storage temperature range C to 150 C Lead temperature (soldering, 10 seconds) C NOTE: 1. ll voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. 2. ll parameters having Min/Max specifications are guaranteed. Typical values are for reference purpose only. 3. Unless otherwise noted, all tests are pulsed tests at the specified temperature, therefore: T J = T C = T. Operating Conditions Regulating current (with adequate heat sinking) (1), I m Input voltage (1), V...3V to 80V Maximum junction temperature, T J C Operating free-air temperature range, T C to 100 C NOTE: 1. Due to thermal dissipation consideration, the maximum LED Vf in parallel should decrease with the regulating current. 2/14

3 Electrical Characteristics Unless otherwise noted, typical values are at T = 25 C. Symbol Parameter Conditions Min Typ Max Units Option C Option C I PE0 Peak regulating current (1)(2) Mode 0 V = 5V, (/ connected to ) Option C Option D Option D Option D m I PE0 /I PE0 Mode 0 (/ connected to ) Mode 1 I PE1 /I PE0 ll Options Current ratio of mode ( open, connected to ) (C1/C2/C3/D1/D2/D3) selection (1) V = 5V Mode 2 I PE2 /I PE0 ( open, connected to ) % I PE3 /I PE0 Mode 3 (/ open) I LR /I PEx (x = 0 to 3) Option C1/C2/C3/D1/D2/D3, Mode 1 to 3, V Regulating current line = 5V and 40V ±1 ±2 regulation (3) Option C1/C2/C3/D1/D2/D3, Mode 0, V = 5V and 40V % V pin voltage Option DJ, Mode 0, V = 5V, with 1Ω external resistor between and V V LR /V pin voltage line regulation (4) Option DJ, Mode 1 to 3, V = 5V and 40V with 1Ω external resistor between and Option DJ, Mode 0, V = 5V and 40V with 1Ω external resistor between and ±1 ± % V DROP Dropout voltage (5) Mode 0 (/ connected to ) V T TP I TP /I PEx (x = 0 to 3) Thermal protection trip temperature Thermal protection mode regulating current When T J is higher than T TP, the peak regulating current decreases to I TP linearly C T J = 175 C 50 % NOTES: 1. For DJ option, the regulating current is determined by an external resistor, R EXT, connected between the pin and the pin. The mode selection function will not change the current ratio of option DJ. To activate the line regulation function, the chip (U3) connected in series with the LED string should be set in Mode 0 ( and connected to pin ). The regulating current will be: I PE = 0.27/R EXT nd the maximum regulating current of second step (ex: U2 in Mode 1) should not exceed 80% of the top level (ex: U3 in Mode 0), otherwise the circuit operation might become abnormal when OTP function is activated. It is strongly recommended to set at 75%. 3/14

4 Electrical Characteristics (Continued) NOTES: (Continued) 2. The user can add an external resistor R EXT between the pin and the pin of U3 (Mode 0, serial connected to the LED string) to increase the regulating current of option C1, C2, C3, D1, D2 and D3, as shown in below. For U1 ~ U2 (Mode 1 ~ Mode 3, parallel connected to the LED string), adding an external resistor R EXT between the pin and the pin may cause abnormal operation and chip damage. For option C1/ C2/ C3, the regulating current variation ΔI PE /I PE = 6.25/R EXT. For option D1/ D2/ D3, the regulating current variation ΔI PE /I PE = 3.13/R EXT. LED Table 1. U3 (Mode 0) Regulating Current Without External Resistor With 100Ω External Resistor Option C XR46084 R EXT Option C Option C Option D Option D Option D Figure 3. External Resistor to Increase Regulating Current 3. The Regulating Current Line Regulation is defined as: For Mode 1~3: For Mode 0: 4. The Pin Voltage Line Regulation is defined as: For Mode 1~3: For Mode 0: I LR /I PEx = I (V = 40V) I (V = 5V), x = 1~3 I (V = 5V) I LR /I PE0 = I (V = 40V) I (V = 5V) I (V = 5V) V LR /V = V (V = 40V) V (V = 5V) V (V = 5V) V LR /V = V (V = 40V) V (V = 5V) V (V = 5V) 5. Dropout voltage = 90% (I V = 5V) 4/14

5 Pin Configuration 1 6 Thermal Pad 2 Thermal Pad mm x 2mm TDFN-6 SOT-89-5 Pin Functions TDFN-6 Pin Number SOT-89-5 Pin Name Description 1 5 Current sense pin. Connected to negative end of LED string. 3 1 Regulating current input pin. Connected to positive end of LED string. 4 2 Regulating current output pin. This is effectively a ground pin. 5 3 Mode selection pin 2. Floating or connecting to pin only. 6 4 Mode selection pin 1. Floating or connecting to pin only. 2 - No Connection Exposed Thermal Pad Exposed thermal pad of the chip. Use this pin to enhance the power dissipation ability. The thermal conductivity will be improved if a copper foil on PCB is soldered with the thermal pad. It is recommended to connect the thermal pad to pin. 5/14

6 Functional Block Diagram Thermal Protection Logic Circuit V REXT - I Figure 5. Functional Block Diagram I-V Curve I I IPE0 Mode 0 IPE Mode 0 ~ Mode 3 IPE1 Mode 1 IPE2 Mode 2 IPE3 Mode VDROP V VDROP V Figure 6. Cx/Dx Options Figure 7. DJ Option 6/14

7 pplications Information 220V C /10W LED Light Engine 3 steps, PF = 0.98, THD = 16% To pass 1V surge test, Q1 can be changed to 800V NMOS V C BD I LED R BL 90Ω LED1 134V 60m V C BD I LED R BL 90Ω LED1 134V 60m R Z1 270Ω U1 XR46084-C2 (Mode 2) LED2 67V 60m R Z1 270Ω U1 XR46084-DJ R1 7.5Ω LED2 67V 60m R Z2 270Ω U2 XR46084-C2 (Mode 1) LED3 67V 60m R Z2 270Ω U2 XR46084-DJ LED3 67V 60m R2 5.1Ω Q1 XR / 600 NMOS Q1 XR / 600 NMOS ZD 24V U3 XR46084-C2 (Mode 0) ZD 24V U3 XR46084-DJ R3 3.9Ω Figure 8. C2 Option Figure 9. DJ Option 7/14

8 pplications Information (Continued) 10W LED Light Engine 3 steps, PF = 0.98, THD = 16% To pass 1V surge test, Q1 can be changed to 800V NMOS V C BD I LED R BL 47Ω LED1 72V 120m V C BD I LED R BL 47Ω LED1 72V 120m R Z1 180Ω U1 XR46084-D2 (Mode 2) LED2 36V 120m R Z1 180Ω U1 XR46084-DJ R1 4.7Ω LED2 36V 120m R Z2 180Ω U2 XR46084-D2 (Mode 1) LED3 36V 120m R Z2 180Ω U2 XR46084-DJ LED3 36V 120m R2 3.3Ω Q1 XR / 600 NMOS Q1 XR / 600 NMOS ZD 18V U3 XR46084-D2 (Mode 0) ZD 18V U3 XR46084-DJ R3 2.4Ω Figure 10. D2 Option Figure 11. DJ Option 8/14

9 pplications Information (Continued) ctive Load In order to be compatible with more types of TRIC dimmers (phase-cut dimmers), an additional active load is needed for better dimming performance, as shown in below: 100~120 V C ctive Load BD MDB10S R4 180Ω 0805 U0 XR46084-DJ U1 XR46084-DJ RS R LED1 LED2 230 VC BD ctive Load R0 300Ω /1W C0 220nF /400V U1 XR46084-DJ R LED1 LED2 R5 180Ω 0805 U2 XR46084-DJ R LED3 R Z1 270Ω 1206 R Z2 270Ω 1206 RS1 249Ω 1206 RS2 249Ω 1206 U2 XR46084-DJ Q1 XR46000 R LED3 Q1 XR46000 Q0 XR46000 U3 XR46084-DJ R ZD 18V U3 XR46084-DJ R ZD 18V U0 XR46084-DJ RS Figure V C TRIC Dimmable 3-Step Solution Figure V C TRIC Dimmable 3-Step Solution 9/14

10 pplications Information (Continued) Linear Type Thermal Protection When the junction temperature T J rises to the Thermal Protection Trip Temperature T TP (typically 130 C), the current sense voltage V starts to decrease linearly at a slope of -1.1%/ C. The LED driving current decreases proportionally with the V voltage. The system will function normally during the thermal protection mode with the lower driving current, but the power dissipation of the system will decrease until thermal equilibrium is reached. I I PEx I TP 0 T TP (130 C) T TSD (175 C) T J Figure 14. Peak Regulating Current vs. T J 10/14

11 Package Description TDFN6 2x2 TOP VIEW BOTTOM VIEW SIDE VIEW X Y B C P D TERMINL DETILS TYPICL RECOMMENDED LND PTTERN Drawing No. : POD Revision: 1. ll dimensioins are in Millimeters 2. Dimensions and tolerance per Jedec MO /14

12 Package Description (Continued) SOT-89-5 D b D1 L E1 b1 E L e b c e1 TOP VIEW SIDE VIEW D1 D2 D C B B1 D θ θ B2 C P1 P2 M TERMINL DETILS TYPICL RECOMMENDED LND PTTERN Drawing No. : POD Revision: - ll dimensioins are in Millimeters 12/14

13 Ordering Information (1) Part Number Regulating Current (m) Operating Temperature Range Lead-Free Package Packag Method XR46084EHTR-C1 (3) 40 XR46084EHTR-C2 (3) 66 XR46084EHTR-C3 (3) 52 XR46084EHTR-D1 (3) 80 XR46084EHTR-D2 (3) C T J 150 C Yes (2) TDFN6 2x2 Reel XR46084EHTR-D3 (3) 104 XR46084EHTR-DJ Determined by external resistor only XR46084ESFTR-C1 (3) 40 XR46084ESFTR-C2 (3) 66 XR46084ESFTR-C3 (3) 52 XR46084ESFTR-D1 (3) 80 XR46084ESFTR-D2 (3) C T J 150 C Yes (2) SOT-89-5 Reel XR46084ESFTR-D3 (3) 104 XR46084ESFTR-DJ Determined by external resistor only XR46084ECF-C1 (3) 40 XR46084ECF-C2 (3) 66 XR46084ECF-C3 (3) 52 XR46084ECF-D1 (3) 80 XR46084ECF-D2 (3) C T J 150 C Yes (2) Dice Wafer XR46084ECF-D3 (3) 104 XR46084ECF-DJ (3) Determined by external resistor only NOTE: 1. Refer to for most up-to-date Ordering Information. 2. Visit for more information. 3. Contact factory for availability. 13/14

14 Revision History Revision Date Description 1 ug 2016 Initial release 1B Oct 2016 Updated Typical pplication, Package Descriptions and Ordering Information table. 1C ug 2017 dded Linear Type Thermal Protection section in pplication Information. Updated to MaxLinear logo. Updated format. Corporate Headquarters: 5966 La Place Court Suite 100 Carlsbad, C Tel.:1 (760) Fax: 1 (760) High Performance nalog: ato Road Fremont, C Tel.: 1 (510) Fax: 1 (510) LEDtechsupport@exar.com The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc.. MaxLinear, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of MaxLinear, Inc. Maxlinear, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless MaxLinear, Inc. receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of MaxLinear, Inc. is adequately protected under the circumstances. MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property. Company and product names may be registered trademarks or trademarks of the respective owners with which they are associated MaxLinear, Inc. ll rights reserved XR46084_DS_ /14