TCS-DL Series - TCS Dual Transient Current Suppressors

Transcription

1 *RoHS OMPLIT & **HLOG R 45 R eatures High-speed performance Superior overcurrent protection idirectional Low resistance xcellent channel to channel resistance matching Small SMT package RoHS compliant* and halogen free** pplications VSL and thernet ports Protection modules and dongles Process control equipment Test and measurement equipment TS-L Series - TS ual Transient urrent Suppressors General Information The ourns TS L Series High-Speed Protector products contain dual, well-matched, low resistance, bidirectional, very high-speed Transient urrent Suppressors. y limiting the maximum current to a safe level, a ourns TS L device offers superior protection for very high data rate differential lines against faults caused by short circuits, induction and lightning surges. Out2 In2 ourns TS 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. The ourns TS High-Speed Protector is provided in a space-saving, surface mount package meeting industry standard requirements such as RoHS and Pb ree solder refl ow profi les. Out1 TS evice In1 bsolute Maximum Ratings (@ T = 25 Unless Otherwise oted) Symbol Parameter Value Unit V imp Peak impulse voltage withstand with duration less than 1 ms 4 V T op Operating temperature range -4 to +125 T stg Storage temperature range -65 to +15 T JMX Maximum junction temperature +125 lectrical haracteristics (@ T = 25 Unless Otherwise oted) Symbol Parameter Part umber Min. Typ. Max. Unit I trigger urrent required for the device to go from operating state to protected state TS-L4-25-WH TS-L4-5-WH TS-L4-75-WH m R O Series resistance of the TS device TS-L4-25-WH TS-L4-5-WH TS-L4-75-WH Ω Δ RO hannel to channel resistance match TS-L4-25-WH TS-L4-5-WH TS-L4-75-WH t limit Time for the device to go from normal operating state to current limiting state 5 ns R θj Junction to air thermal resistance, R4 P..35 sq. in. of copper in addition to solder pads 13 /W ±.5 ±.3 ±.2 Ω sia-pacific: Tel: ax: urope: Tel: ax: The mericas: Tel: ax: * RoHS irective 22/95/ Jan. 27, 23 including annex and RoHS Recast 211/65/U June 8, 211. ** ourns follows the prevailing defi nition of halogen free in the industry. ourns considers a product to be halogen free if (a) the romine (r) content is 9 ppm or less; (b) the hlorine (l) content is 9 ppm or less; and (c) the total romine (r) and hlorine (l) content is 15 ppm or less.

2 TS-L Series - TS ual Transient urrent Suppressors ormalized urrent ormalized Resistance ormalized Trip urrent Performance Graphs Graph 1 below shows a normalized Typical V-I curve for ourns TS L Series High-Speed Protector products under surge conditions. Graphs 2 and 3 show the change in resistance and trip current versus temperature, respectively. ormalized V-I urve Under Surge onditions Voltage (V) Resistance hange vs. Temperature Temperature ( ) Trip urrent hange vs. Temperature Temperature ( ) asic evice Operation SURG PROTTIO The ourns TS 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. PROTT VI ourns TS HSP VOLTG LIMITIG VI oordination of ourns TS High-Speed Protector with Overvoltage Limiting evice TRSIT SURG 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 defi ned limit of the ourns TS High-Speed Protector. esigners should choose a ourns TS High-Speed Protector with a current limit that the protected device can handle for the duration of the surge event. The ourns TS High-Speed Protector acts like a low value resistor during normal operation. s the ourns TS High- Speed 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 P traces, which with careful layout can be kept to an absolute minimum. The ourns TS High-Speed Protector can block voltages up to 4 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. or 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. ven 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 ourns TS High-Speed Protector. The ourns TS 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 TU High-Speed Protector device, the TS Protector does not exhibit a strong foldback

3 TS-L Series - TS ual Transient urrent Suppressors asic evice Operation (ontinued) characteristic after reaching the current limit, and therefore doesn t protect against 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 ourns TISP devices. oth the ourns TS High-Speed Protector and TVS 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 TS-L devices at both +25 and +85. TS-L4-25-WH SO Single Surge uration TS-L4-75-WH SO Single Surge uration Voltage cross TS evice (Volts) Voltage cross TS evice (Volts) Time (Seconds) Time (Seconds) TS-L4-5-WH SO Single Surge uration Voltage cross TS evice (Volts) Time (Seconds) 25

4 TS-L Series - TS ual Single Transient urrent Suppressors asic evice Operation (ontinued) OORITIO In all applications, the overvoltage protection device should be chosen to limit the maximum voltage across the ourns TS High-Speed Protector to less than the maximum voltage rating of the device. If this maximum voltage limit is exceeded, the ourns TS 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. USIG MULTIPL TS-L VIS I SRIS OR PRLLL ourns TS High-Speed Protectors may be connected in parallel to achieve even lower on-state resistance. If matching is required, use two ourns TS-L Series HSPs, and connect one ourns TS High-Speed Protector from each L device in parallel. In addition, because of their ultra-fast response, multiple ourns TS High-Speed Protectors may be connected in series to achieve multiples of the breakdown voltage. Reference pplications Two good examples of applications where the combination of a ourns TS High-Speed Protector and a voltage limiting device provides exceptional performance are in VSL VSL In the VSL application shown below, the transformer provides additional protection against sustained faults and the coupling capacitors, 1 and 2, provide protection against and mains frequency power faults. The termination resistors and thernet circuits, where the line is driven differentially by a transformer. R1 and R2 are reduced in value by the nominal resistance of the ourns TS High-Speed Protector to maintain the overall termination resistance. SOT23-S24 TIP R1 LI RIVR1 TS-L1 (a) SOT23-S R2 LI RIVR2 TS-L2 (b) Gb In the Gigabit thernet (Gb) application circuit shown below, the transformer provides additional protection against sustained faults and provides some isolation from surge conditions such as lightning strikes. The TS 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 1 W Zener iode T1 asic Schematic of a VSL Line river Stage RIG 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 4 V maximum rating of the TS device. ot Used To LI SO323-Txx 1T:1T 1/4 SM51589L thernet PHY TS-L Gigabit thernet pplication ircuit ustomers should verify actual device performance in their specifi c applications

5 TS-L Series - TS ual Transient urrent Suppressors Product imensions Recommended Pad Layout PI 1 im. G H J K M TS-L4-25-WH TS-L4-5-WH TS-L4-75-WH Min. Typ. Max. Min. Typ. Max. Min. Typ. Max (.94). (.) (.41).75 (.3) (.55).1 (.4).55 (.22) G G K 4. (.157) 2.5 (.98).25 (.1) 1.1 (.43).8.15 (.6).6 (.24) J (.12).9 (.35).5 (.2) 1.15 (.45) (.59) 5 (.14).65 (.26) (.134). (.) 2.5 (.81).75 (.3) (.55).1 (.4).55 (.22) K J 4. (.157) 3.5 (.138).25 (.1) 2.1 (.83).8.15 (.6).6 (.24) H H (.142).9 (.35).5 (.2) 2.15 (.85) (.59) 5 (.14).65 (.26) M (.173). (.) 3.5 (.12).75 (.3) (.55).1 (.4).55 (.22) 4. (.157) 4.5 (.177).25 (.1) 3.1 (.122).8.15 (.6).6 (.24) (.181).9 (.35).5 (.2) 3.15 (.124) (.59) 5 (.14).65 (.26) im. TS-L4-25-WH TS-L4-5-WH TS-L4-75-WH 1.1 (.43) 2.1 (.83) 3.1 (.122) Pad esignation Pad # pply Pad # pply 1 In1 4 Out Out1 6 In2 = Solder to P; do not make electrical connection, do not connect to ground. VI OY OUTLI SOLR STIL OPIGS P MOUTIG PS P MOUTIG PS ourns TS High-Speed Protectors have a matte-tin termination. The recommended solder stencil thickness is.1 to.12 mm (.4 to.5 in.). The stencil opening for pins 1,3,4 and 6 should be the same size as the recommended P pad size. The stencil openings for pins 2 and 5 of the device should cover 6-7 % of the area of the P pad and should be divided into smaller areas as shown in the solder stencil fi gure. IMSIOS: MM (IHS)

6 TS-L Series - TS ual Transient urrent Suppressors Reflow Profile Profile eature Pb-ree ssembly verage Ramp-Up Rate (Tsmax to Tp) 3 /sec. max. Preheat - Temperature Min. (Tsmin) - Temperature Max. (Tsmax) - Time (tsmin to tsmax) sec. Time maintained above: - Temperature (TL) - Time (tl) sec. Peak/lassifi cation Temperature (Tp) 26 Time within 5 of ctual Peak Temp. (tp) 2-4 sec. Ramp-own Rate 6 /sec. max. Time 25 to Peak Temperature 8 min. max. How to Order TS Product Series L = ual Series Impulse Voltage Rating 4 = 4 V Minimum Trigger urrent 25 = 25 m 5 = 5 m 75 = 75 m Hold to Trip Ratio Suffi x W = 2:1 Maximum to Minimum Trigger urrent Ratio Package Suffi x H = Package TS - L WH Typical Part Marking PI 1 MRKIG O. 42 = TS-L4-25-WH 45 = TS-L4-5-WH 47 = TS-L4-75-WH MUTURIG T O* 6-MOTH PRIO OS: - 1ST IGIT IITS TH YR S 6-MOTH PRIO. = J-JU 212 = JUL IGIT IITS TH WK UMR I TH = JUL- 212 = J-JU MOTH PRIO. - 3R & 4TH IGITS IIT SPII LOT OR TH WK. = J-JU 213 = JUL- 214 XMPL: R - 1ST IGIT = J-JU 212, - 2 IGIT R = WK 18 (WK O PRIL 27), - 3R & 4TH IGITS = LOT SPII IO.

7 TS-L Series - TS ual Transient urrent Suppressors Packaging Specifications P R MX. t P 2 W K.12 (.5) 1 P 1 QUTITY: 3 PIS PR RL G (MSUR T HU).12 (.5) R USR IRTIO O G Min. Max. Min. Max. Min. Max. Min. Max. Min. Max (12.835) (13.2) (.59) (.98) (.54) (.531) (.795) (.488) (.567) 1 Ref. Min. Max. Min. Max. Min. Max. Min. Max (3.937) (.165) (.173) (.59) (.63) (.59) (.65) (.73) K P P1 P2 Min. Max. Min. Max. Min. Max. Min. Max. Min. Max (.215) 5.55 (.219) 1. (.39) 1.2 (.47) (.311) 8.1 (.319) 1.95 (.77) 2.5 (.81) t W Min. Max. Min. Max. 5 (.14) 11.7 (.461) 12.3 (.484) TS-L4-25-WH TS-L4-5-WH TS-L4-75-WH Min. Max. Min. Max. Min. Max. 2.7 (.16) 2.9 (.114) 3.7 (.146) (.185) 4.9 (.193) IMSIOS: MM (IHS) 8/12 TU is a registered trademark of ourns, Inc. in the United States and other countries. TS is a trademark of ourns, Inc. TISP is a registered trademark of ourns Ltd., a ourns ompany, in the United States and other countries, except that TISP is a registered trademark of ourns, Inc. in hina.