CO LO & MP LI GE AN N T FR EE *R oH S ** HA Features ■ High-speed performance ■ RoHS compliant* and halogen free** ■ Superior overcurrent protection ■ Bidirectional Applications ■ VDSL and Ethernet ports ■ Low resistance ■ Excellent channel to channel resistance matching ■ Small SMT package ■ Protection modules and dongles ■ Process control equipment ■ Test and measurement equipment TCS-DL Series - TCS™ Dual Transient Current Suppressors General Information The Bourns® TCS™ DL Series High-Speed Protector products contain dual, well-matched, low resistance, bidirectional, very high-speed Transient Current Suppressors. By limiting the maximum current to a safe level, a Bourns® TCS™ DL device offers superior protection for very high data rate differential lines against faults caused by short circuits, induction and lightning surges. Bourns® TCS™ High-Speed Protectors are typically used in conjunction with low capacitance TVS devices to form an extremely low let-through energy barrier to excessive voltages and currents during surge events which may cause damage to unprotected high-speed, low voltage driver and receiver components. Out2 In2 Out1 In1 TCS™ Device The Bourns® TCS™ High-Speed Protector is provided in a space-saving, surface mount DFN package meeting industry standard requirements such as RoHS and Pb Free solder reflow profiles. Absolute Maximum Ratings (@ TA = 25 °C Unless Otherwise Noted) Symbol Vimp Top Tstg TJMAX Parameter Peak impulse voltage withstand with duration less than 1 ms Operating temperature range Storage temperature range Maximum junction temperature Value 40 -55 to +125 -65 to +150 +125 Unit V °C °C °C Electrical Characteristics (@ TA = 25 °C Unless Otherwise Noted) Symbol Parameter Part Number Min. Typ. Max. Unit Itrigger Current required for the device to go from operating state to protected state TCS-DL004-250-WH TCS-DL004-500-WH TCS-DL004-750-WH 250 500 750 375 750 1100 500 1000 1500 mA RON Series resistance of the TCS™ device TCS-DL004-250-WH TCS-DL004-500-WH TCS-DL004-750-WH 1.6 1.0 0.7 2.3 1.4 1.0 3.0 1.8 1.3 Ω ΔRON Channel to channel resistance match TCS-DL004-250-WH TCS-DL004-500-WH TCS-DL004-750-WH ±0.05 ±0.03 ±0.02 Ω tlimit Time for the device to go from normal operating state to current limiting state Junction to air thermal resistance, FR4 PCB. 0.035 sq. in. of copper in addition to solder pads RθJA 50 ns 130 °C/W Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116 EMEA: Tel: +36 88 520 390 • Fax: +36 88 520 211 The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700 www.bourns.com * RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. ** Bourns follows the prevailing definition of “halogen free” in the industry. Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. TCS-DL Series - TCS™ Dual Transient Current Suppressors Performance Graphs Basic Device Operation Graph 1 below shows a normalized Typical V-I curve for Bourns TCS™ DL Series High-Speed Protector products under surge conditions. Graphs 2 and 3 show the change in resistance and trip current versus temperature, respectively. ® Normalized V-I Curve Under Surge Conditions SURGE PROTECTION The Bourns® TCS™ High-Speed Protector is designed to be used in conjunction with a suitable overvoltage limiting device, such as a TVS diode or a TISP® thyristor as shown below, to provide comprehensive current and voltage limiting protection against surges. Normalized Current 1.2 Bourns® TCS™ HSP 1.0 0.8 0.6 0.4 PROTECTED DEVICE 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -40 VOLTAGE LIMITING DEVICE Coordination of Bourns® TCS™ High-Speed Protector with Overvoltage Limiting Device -30 -20 -10 0 10 20 30 40 Voltage (V) Resistance Change vs. Temperature Normalized Resistance 1.5 This two-stage protection limits the maximum voltage at the interface to the clamping voltage of the overvoltage device, while also limiting the current into the protected device to the defined limit of the Bourns® TCS™ High-Speed Protector. Designers should choose a Bourns® TCS™ High-Speed Protector with a current limit that the protected device can handle for the duration of the surge event. 1.4 The Bourns® TCS™ High-Speed Protector acts like a low value resistor during normal operation. As the Bourns® TCS™ HighSpeed Protector has no electrical connection to anything other than the signal line it protects, the capacitance to ground is purely dictated by the capacitance of the device to surrounding components and PCB traces, which with careful layout can be kept to an absolute minimum. 1.3 1.2 1.1 1.0 0.9 0.8 0.7 -55 -35 -15 5 25 45 65 85 105 125 Temperature (°C) Trip Current Change vs. Temperature 2.00 Normalized Trip Current TRANSIENT SURGE 1.75 1.50 The Bourns® TCS™ High-Speed Protector can block voltages up to 40 V. This enables very low voltage electronics to be protected by a lower capacitance, higher voltage TVS device, thus achieving very low capacitive loading on high-speed signal lines. For example, on a 3.3 V driver, a 12 V rated TVS may be used, having much lower and more linear capacitance than a lower voltage type. Even though a high voltage TVS is used, the maximum stress seen by the protected device is much lower than would be seen by using a low voltage TVS by itself, as the current is limited to within the maximum limits of the Bourns® TCS™ High-Speed Protector. 1.25 The Bourns® TCS™ High-Speed Protector is primarily designed to offer superior and cost-effective protection of sensitive electronics against high energy surges that are transient in nature. Unlike the more complex TBU® High-Speed Protector device, the TCS™ Protector does not exhibit a strong foldback 1.00 0.75 0.50 0.25 0 -55 -35 -15 5 25 45 65 Temperature (°C) 85 105 125 Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. TCS-DL Series - TCS™ Dual Transient Current Suppressors Basic Device Operation (Continued) characteristic after reaching the current limit, and therefore doesn’t protect against DC and low frequency stresses (typically achieved through the use of a transformer or capacitive coupling). This is analogousto comparing the shunting characteristics of a Transient Voltage Suppressor device to a thyristor type of protector, such as Bourns® TISP® devices. Both the Bourns® TCS™ High-Speed Protector and TVS Voltage Across TCS™ Device (Volts) 50 40 25 °C 30 85 °C 20 10 0.0001 0.001 0.01 0.1 1 Time (Seconds) Voltage Across TCS™ Device (Volts) TCS-DL004-750-WH SOA Single Surge Duration TCS-DL004-250-WH SOA Single Surge Duration 0 0.00001 device have limited or no foldback characteristic, and therefore have relatively low short term surge energy limits. When used together in a protection circuit, the surge must not exceed the thermal capability of either device. The following three graphs show the maximum surge duration with respect to voltage of the three TCS-DL devices at both +25 °C and +85 °C. 50 40 25 °C 30 85 °C 20 10 0 0.00001 0.0001 0.001 0.01 Time (Seconds) Voltage Across TCS™ Device (Volts) TCS-DL004-500-WH SOA Single Surge Duration 50 40 25 °C 30 85 °C 20 10 0 0.00001 0.0001 0.001 0.01 0.1 1 Time (Seconds) Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 0.1 1 TCS-DL Series - TCS™™ Dual Single Transient Transient Current Current Suppressors Suppressors Basic Device Operation (Continued) COORDINATION In all applications, the overvoltage protection device should be chosen to limit the maximum voltage across the Bourns® TCS™ High-Speed Protector to less than the maximum voltage rating of the device. If this maximum voltage limit is exceeded, the Bourns® TCS™ High-Speed Protector may begin to avalanche, and it will cease to effectively block the current into the protected device, which may result in damage. USING MULTIPLE TCS-DL DEVICES IN SERIES OR PARALLEL Bourns® TCS™ High-Speed Protectors may be connected in parallel to achieve even lower on-state resistance. If matching is required, use two Bourns® TCS-DL Series HSPs, and connect one Bourns® TCS™ High-Speed Protector from each DL device in parallel. In addition, because of their ultra-fast response, multiple Bourns® TCS™ High-Speed Protectors may be connected in series to achieve multiples of the breakdown voltage. Reference Applications Two good examples of applications where the combination of a Bourns® TCS™ High-Speed Protector and a voltage limiting device provides exceptional performance are in VDSL and Ethernet circuits, where the line is driven differentially by a transformer. VDSL In the VDSL application shown below, the transformer provides additional protection against sustained DC faults and the coupling capacitors, C1 and C2, provide protection against DC and mains frequency power faults. The termination resistors R1 and R2 are reduced in value by the nominal resistance of the Bourns® TCS™ High-Speed Protector to maintain the overall termination resistance. TIP CDSOT23-S2004 C2 R1 LINE DRIVER1 C1 TCS-DL1 (a) CDSOT23-S2004 1W Zener Diode RING T1 R2 LINE DRIVER2 TCS-DL2 (b) Basic Schematic of a VDSL Line Driver Stage GbE In the Gigabit Ethernet (GbE) application circuit shown below, the transformer provides additional protection against sustained DC faults and provides some isolation from surge conditions such as lightning strikes. The TCS™ device limits the current that the PHY will be subjected to under a surge condition. It also provides voltage isolation so that the peak voltage that the PHY is subjected to will be lower than the TVS diode clamp voltage. The TVS diode will sink the majority of the transformer secondary current and clamp the voltage to a level that is below the 40 V maximum rating of the TCS™ device. To LINE Not Used CDSOD323-TxxC 1CT:1CT 1/4 SM51589L Ethernet PHY TCS-DL Gigabit Ethernet Application Circuit Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. TCS-DL Series - TCS™ Dual Transient Current Suppressors Recommended Pad Layout Product Dimensions B B A C A C D E XXXXX YWWLL F PIN 1 SEATING PLANE A1 J J Dim. D E E TCS-DL004-250-WH TCS-DL004-500-WH TCS-DL004-750-WH 0.80 (.031) 0.25 (.010) 0.30 (.012) 1.1 (.043) 1.45 (.057) 0.30 (.012) 0.80 (.031) 0.25 (.010) 0.30 (.012) 2.1 (.083) 1.45 (.057) 0.30 (.012) 0.80 (.031) 0.25 (.010) 0.30 (.012) 3.1 (.122) 1.45 (.057) 0.30 (.012) M A F 4 5 6 B G C F D 3 1 2 H K G E F H M Pad Designation TCS-DL004-250-WH TCS-DL004-500-WH TCS-DL004-750-WH Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. 0.80 (.031) 0.00 (.000) 2.40 (.094) 3.90 (.154) 1.05 (.041) 0.20 (.008) 0.75 (.030) 1.40 (.055) 0.10 (.004) 0.25 (.010) 0.55 (.022) 0.20 (.008) 0.90 (.035) 0.025 (.001) 2.50 (.098) 4.00 (.157) 1.10 (.043) 0.25 (.010) 0.8 (.031) 1.45 (.057) 0.15 (.006) 0.30 (.012) 0.60 (.024) 0.25 (.010) 1.00 (.039) 0.05 (.002) 2.60 (.102) 4.10 (.161) 1.15 (.045) 0.30 (.012) 0.85 (.033) 1.50 (.059) 0.20 (.008) 0.35 (.014) 0.65 (.026) 0.30 (.012) 0.80 (.031) 0.00 (.000) 3.4 (.134) 3.90 (.154) 2.05 (.081) 0.20 (.008) 0.75 (.030) 1.40 (.055) 0.10 (.004) 0.25 (.010) 0.55 (.022) 0.20 (.008) 0.90 (.035) 0.025 (.001) 3.5 (.138) 4.00 (.157) 2.10 (.083) 0.25 (.010) 0.8 (.031) 1.45 (.057) 0.15 (.006) 0.30 (.012) 0.60 (.024) 0.25 (.010) 1.00 (.039) 0.05 (.002) 3.6 (.142) 4.10 (.161) 2.15 (.085) 0.30 (.012) 0.85 (.033) 1.50 (.059) 0.20 (.008) 0.35 (.014) 0.65 (.026) 0.30 (.012) 0.80 (.031) 0.00 (.000) 4.4 (.173) 3.90 (.154) 3.05 (.120) 0.20 (.008) 0.75 (.030) 1.40 (.055) 0.10 (.004) 0.25 (.010) 0.55 (.022) 0.20 (.008) 0.90 (.035) 0.025 (.001) 4.5 (.177) 4.00 (.157) 3.10 (.122) 0.25 (.010) 0.8 (.031) 1.45 (.057) 0.15 (.006) 0.30 (.012) 0.60 (.024) 0.25 (.010) 1.00 (.039) 0.05 (.002) 4.6 (.181) 4.10 (.161) 3.15 (.124) 0.30 (.012) 0.85 (.033) 1.50 (.059) 0.20 (.008) 0.35 (.014) 0.65 (.026) 0.30 (.012) Dim. A A1 B C D E F G H J K M DIMENSIONS: Pad # 1 2 3 Apply In1 NC Out1 Pad # 4 5 6 Apply Out2 NC In2 NC = Solder to PCB; do not make electrical connection, do not connect to ground. DEVICE BODY OUTLINE PCB MOUNTING PADS SOLDER STENCIL OPENINGS PCB MOUNTING PADS Bourns® TCS™ High-Speed Protectors have a matte-tin termination. The recommended solder stencil thickness is 0.10 to 0.12 mm (0.004 to 0.005 in.). The stencil opening for pins 1,3,4 and 6 should be the same size as the recommended PCB pad size. The stencil openings for pins 2 and 5 of the device should cover 60-70 % of the area of the PCB pad and should be divided into smaller areas as shown in the solder stencil figure. MM (INCHES) Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. TCS-DL Series - TCS™ Dual Transient Current Suppressors Typical Part Marking How to Order TCS - DL 004 - 500 - WH 5 DIGIT PRODUCT CODE: • 1ST ALPHA CHARACTER INDICATES PRODUCT FAMILY: D = TCS-DL SERIES • 2ND & 3RD DIGITS INDICATE IMPULSE VOLTAGE. • 4TH & 5TH DIGITS INDICATE TRIGGER CURRENT. TCS™ Product Series DL = Dual Series Impulse Voltage Rating 004 = 40 V XXXXX YWWLL Minimum Trigger Current 250 = 250 mA 500 = 500 mA 750 = 750 mA PIN 1 Hold to Trip Ratio Suffix W = 2:1 Maximum to Minimum Trigger Current Ratio Package Suffix H = DFN Package MANUFACTURING DATE CODE: • 1ST DIGIT INDICATES THE YEAR. • 2ND & 3RD DIGITS INDICATE THE WEEK NUMBER. • 4TH & 5TH DIGITS INDICATE LOT CODE. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. TCS-DL Series - TCS™ Dual Transient Current Suppressors Packaging Specifications P0 B D0 t R 0.20 (.008) MAX. E P2 F A W N C D B0 K0 0.12 (.005) A0 P1 D1 QUANTITY: 3000 PIECES PER REEL USER DIRECTION OF FEED 0.12 (.005) G (MEASURED AT HUB) A Min. 326 (12.835) B Max. 330 (13.002) N Ref. 100 (3.937) F Min. 5.45 (.215) Min. 1.5 (.059) Max. 4.40 (.173) Min. 1.50 (.059) Min. 1.00 (.039) Max. 1.20 (.047) Min. 3.90 (.154) Max. 0.35 (.014) Min. 11.70 (.461) 0.25 (.010) D G Max. 13.5 (.531) Min. 20.2 (.795) Max. 1.60 (.063) Min. 1.50 (.059) Max. 4.10 (.161) Min. 7.90 (.311) Max. 8.10 (.319) DIMENSIONS: MM (INCHES) D0 K0 Max. 5.55 (.219) Max. — Min. 12.4 (.488) D1 P0 Max. 14.4 (.567) E Max. - Min. 1.65 (.065) P1 Max. 1.85 (.073) P2 Min. 1.95 (.077) Max. 2.05 (.081) W TCS-DL004250-WH Min. 2.70 (.106) Min. 12.8 (.504) A0 Min. 4.20 (.165) t Min. 0.25 (.010) C Max. 2.5 (.098) R Max. 2.90 (.114) TCS-DL004500-WH B0 Min. Max. 3.70 3.90 (.146) (.154) Max. 12.30 (.484) TCS-DL004750-WH Min. 4.70 (.185) Max. 4.90 (.193) REV. 12/15 “TBU” is a registered trademark of Bourns, Inc. in the United States and other countries. “TCS” is a trademark of Bourns, Inc. “TISP” is a registered trademark of Bourns Ltd., a Bourns Company, in the United States and other countries, except that “TISP” is a registered trademark of Bourns, Inc. in China. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications.