LBP01 LED bypass protection Datasheet − production data Features ■ Bidirectional device: LBP01-0810B ■ Unidirectional device: LBP01-0803SC5 ■ RoHS compliant Benefits ■ Keep LED strings on in case of LED open mode failure ■ Reduced maintenance cost ■ Increase lifetime of the lighting system SOT23-5L LBP01-0803SC5 SMB (DO-214AA) LBP01-0810B Figure 1. Functional diagrams Complies with the following standards: ■ IEC61000-4-2 level 4 – ±15 kV (air discharge) – ±8 kV (contact discharge) ■ IEC 61000-4-5 – ±1kV / 24 A Control circuit LBP01-0810B Control circuit Applications This device shunts failed LEDs in applications where LED strings can not be turned-off for safety reason due to a LED failure. Main applications are: ■ Automotive headlights ■ Traffic lights ■ Aircraft runaway lights ■ Emergency lighting systems ■ Display panel backlighting ■ Street lighting 1 3 4 5 2 LBP01-0803SC5 Description The LBP01 series are bypass switches to be connected in parallel with 1 or 2 LEDs. In case of LED failure, this allows the current to flow through the other LEDs. It also provides an overvoltage protection against surges defined in IEC 61000-4-2 and IEC 61000-4-5 Their robust dice also protect LEDs against surge. These devices are compatible with LEDs up to 1 A. LBP01 are packaged either in SMB or SOT23-5L March 2012 This is information on a product in full production. Doc ID 022950 Rev 1 1/8 www.st.com 8 Characteristics LBP01 1 Characteristics Table 1. Absolute maximum ratings (Tamb = 25 °C) Symbol Parameter IEC 61000-4-2 contact discharge Unit 30 kV 24 A 0.35 A 1 A VPP Peak pulse voltage IPP Repetitive peak pulse current (8/20µs) IF On-state DC current Tj Operating junction temperature range -55 to 150 °C Storage temperature range -65 to 150 °C 260 °C SOT23-5L Tstg TL Table 2. SMB Maximum lead temperature for soldering during 10 s Electrical characteristics (Tamb = 25 °C) Symbol IRM Test conditions Min. 8 IH Von Ion = 1 A mA 2 V SMB 1.3 V SMB 1.5 V 300 Doc ID 022950 Rev 1 V 200 Ion = 0.35 A 1. Measured between pin 1, 3, 4, or 5 and pin 2 15 SMB SOT23-5L On recommended pad layout with copper area of 1 cm2 nA 200 Ion = 0.35 A (1) Unit 100 SOT23-5L dV/dt Rth(j-a) Typ. Max. VRM = 3 V VBO 2/8 Value V/µs SOT23-5L 140 °C/W SMB 100 °C/W LBP01 Ordering information scheme Figure 3. Thermal resistance, junction to ambient, versus copper area under each lead (SMB) Figure 2. 200 Rth(j-a)(°C/W) Thermal resistance, junction to ambient, versus copper area under each lead (SOT23-5L) Rth(j-a)(°C/W) 240 220 180 200 160 180 140 160 120 140 120 100 SCu(mm2) SCu(mm2) 100 80 0 20 40 60 80 100 120 140 160 180 200 0 2 Ordering information scheme Figure 4. Ordering information scheme LBP 20 40 01 60 - 80 100 120 140 160 180 200 vv ii p LED bypass protection Version Breakdown voltage Forward DC current Delivery mode SC5 = SOT23-5L B = SMB Doc ID 022950 Rev 1 3/8 Package information 3 LBP01 Package information ● Epoxy meets UL94, V0 ● Lead-free package In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Table 3. SMB dimensions Dimensions Ref. Millimeters E1 Inches Min. Max. Min. Max. A1 1.90 2.45 0.075 0.096 A2 0.05 0.20 0.002 0.008 b 1.95 2.20 0.077 0.087 c 0.15 0.40 0.006 0.016 D 3.30 3.95 0.130 0.156 E 5.10 5.60 0.201 0.220 E1 4.05 4.60 0.159 0.181 L 0.75 1.50 0.030 0.059 D E A1 A2 C L Figure 5. b Footprint, dimensions in mm Figure 6. (inches) 1.62 2.60 (0.064) (0.102) Marking(1) 1.62 (0.064) 2.18 (0.086) x x x z y ww ECOPACK compliance XXX: Marking Z: Manufacturing location Y: Year WW: week 5.84 (0.23) 1. Product marking may be rotated by 90° for assembly plant differentiation. In no case should this product marking be used to orient the component for its placement on a PCB. Only pin 1 mark is to be used for this purpose. 4/8 Doc ID 022950 Rev 1 LBP01 Package information Table 4. SOT23-5L dimensions Dimensions Ref. Millimeters Min. Typ. Max. c A1 q L H A E Inches Min. Typ. Max. A 0.90 1.45 0.035 0.057 A1 0 0.10 0.004 A2 0.90 1.30 0.035 0.051 b 0.35 0.50 0.014 0.020 c 0.09 0.20 0.004 0.008 D 2.80 3.05 0.11 0.118 E 1.50 1.75 0.059 0.069 0 e D b e e A2 Figure 7. 0.95 0.037 H 2.60 3.00 0.102 0.118 L 0.10 0.60 0.004 0.024 M 0° Footprint, dimensions in mm Figure 8. (inches) 10° 0° 10° Marking 0.60 (0.024) 1.20 (0.047) 0.95 (0.037) 1.10 (0.043) Doc ID 022950 Rev 1 xxxx 2.30 3.50 (0.138) (0.091) 5/8 Recommendations on PCB assembly LBP01 4 Recommendations on PCB assembly 4.1 PCB design 1. To control the solder paste amount, the closed via is recommended instead of open vias. 2. The position of tracks and open vias in the solder area should be well balanced. The symmetrical layout is recommended, in case any tilt phenomena caused by asymmetrical solder paste amount due to the solder flow away. Figure 9. 4.2 Printed circuit board layout Reflow profile Figure 10. ST ECOPACK® recommended soldering reflow profile for PCB mounting 240-245 °C Temperature (°C) 250 -2 °C/s to -3 °C/s -6 °C/s max 2 - 3 °C/s 60 sec (90 max) 200 150 100 0.9 °C/s 50 Time (s) 0 Note: 6/8 30 60 90 120 150 180 210 240 270 300 Minimize air convection currents in the reflow oven to avoid component movement. Doc ID 022950 Rev 1 LBP01 5 Ordering information Ordering information Table 5. Ordering information Order code Marking Package Weight Base qty Delivery mode LBP01-0803SC5 XT08 SOT23-5L 16 mg 3000 Tape and reel SMB 0.11 g 2500 Tape and reel LBP01-0810B (1) L08 1. The marking can be rotated by 90° to differentiate assembly location. 6 Revision history Table 6. Document revision history Date Revision 20-Mar-2012 1 Changes Initial release. Doc ID 022950 Rev 1 7/8 LBP01 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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