VDD GND VBAT INPUT LATCH J5 J6 J7 ISL5571 DAUGHTER BOARD EXTERNAL PROTECTION ISL5571AIB ACCESS SWITCH INVERTER CIRCUIT FLOATING L MODE TSD

Transcription

1 USER S MANUA IS5571A/BEVA1 ine Card Access Switch Evaluation Kit AN9870 Rev 0.00 Introduction The ine Card Access Switch (CAS) evaluation kit was designed to provide customers with a convenient and simple test platform for evaluating the operation of the IS5571A. Using basic power supplies and measuring equipment, key features and data sheet parameters can be observed and measured. This document shows the user how to setup the test platform. It also provides a step by step procedure to verify the correct operation of the switch. The CAS evaluation kit consists of the following items: 1. The evaluation mother board, part number: IS5571A/B EVA1 REV A 2. The IS5571 daughter board, part number: IS5571A / B- DBEVA1 3. Data Sheet for the IS5571A (File Number: 4920) Note: It is highly encouraged that the user read through the data sheet before performing any exercises with this kit. Functional Description This platform enables the user to evaluate the switch by itself or in a line card application. This design makes use of a daughter card that could be plugged into the mother board (provided with this kit) or Intersil s UniSIC14 evaluation board (part number C5514XEVA1 REV B). Customers interested in evaluating the CAS switch along with the UniSIC14 should consider getting this evaluation This document will discuss the evaluation of the CAS switch using the mother board provided in the kit. The mother board provides the interface between the user and the daughter card. Access to the IS5571A s logic control, and the T INE, R INE, T BAT, R BAT, TSD and Ring Generator ports are provide through the mother The IS5571 daughter board is keyed to plug into the mother board in only one direction. A top view of the mother board with the daughter board installed is shown in Figure 1. The daughter card contains the IS5571A chip, external surge and power cross protection devices, and an inverter circuit to invert the logic signal apply to the INPUT pin of the IS5571A. The inverter circuit is included in the design of the daughter board to enable it to function properly with the UniSIC14 evaluation In most line card applications the relay signal from the SIC must be inverted to work with an CAS switch. The board is equipped with two Single Pole Double Throw center open switches (ATC, INPUT), one Single Pole Double Throw switch (TSD), and one 4 Pole Double Throw switch (MODE). The ATC, INPUT, and TSD switches control the logic state of the IS5571A. If off board logic control of the IS5571A is desired, the ATC and INPUT switches can be set in the center position and the TSD switch can be set in the floating position. The IS5571A can now be controlled by either the logic terminal port (J12) or the banana jacks (J3, J4 and J10). The MODE switch configures the mother board in one of two modes. Either the NORMA mode (where the switch can be TM IS5571A/BEVA1 REV A CA INTERSI TINE RINE RJ11 J1 J2 + + ED ON INE BREAK SWITCES COSED J5 J6 J7 ED ON RING ACCESS RING RETURN SWITCES COSED VDD GND VBAT INPUT ATC IS5571 DAUGTER BOARD EXTERNA PROTECTION INVERTER CIRCUIT R4 R5 IS5571AIB ACCESS SWITC SWM1 SWM2 SWM3 INPUT ATC TSD OGIC TERMINA PORT ATC GND INPUT GND TSD GND FOATING SWM4 MODE FIGURE 1. TOP VIEW OF MOTER BOARD WIT DAUGTER BOARD J3 J4 J11 J8 J9 J10 RING GENERATOR TBAT RBAT TSD AN9870 Rev 0.00 Page 1 of 7

2 IS5571A/BEVA1 configured for normal operation in a line card) or the ED mode. The ED mode connects the onboard EDs for a quick functional check of the IS5571A. Power Requirements for the Eval Kit Power Supply Connections The IS5571A mother board requires two external power supplies. V BAT = (Typ) and V DD = +5V. Ground Connections The two external power supplies should each be grounded at the evaluation Getting Started Verify that the IS5571 daughter board is plugged firmly into the mother Connect the +5V supply to the VDD banana jack (J5) and the supply to the VBAT banana jack (J7). Verifying Basic Operation The operation of the switch can be verified by performing the following tests: 1. ED Mode Verification ine Break Switches TSD Operation ATC Operation Ring Return and Ring Access Switches 2. Normal Mode Verification r ON measurement of ine Break switches Operation and Current imit of ine Break Switch, Ring Return Switch and the ine Break Switch Operation of Thermal Shutdown Ringing a Phone Test #1, ED Mode Verification A quick check using the on-board EDs will verify that the switches of the IS5571 open and close correctly when the appropriate logic control signals are applied. The state of the 2 EDs indicate the following: When ED is on (illuminate) and ED is off, the ine Break switches ( and ) are both ON (Closed). Reference Figure 2. When ED is on (illuminate) and ED is off, the Ring Access switch () and Ring Return switch () are both ON (Closed). Reference Figure 3. When both EDs ( and ) are on (illuminate), the ine Break switches ( and ) and the Ring Access switch () are ON (Closed). The Ring Return switch is off (Open). Reference Figure 4. When both EDs ( and ) are off, all the switches of the IS5571A (,,, ) are OFF (Open). This occurs whenever the TSD pin is low. The ED mode will also provide a quick check of the IS5571A latch feature. INPUT = igh** TSD = Floating ATC = ow **Opposite of data sheet for operation with UniSIC14 FIGURE 2. INE BREAK SWITC VERIFICATION INPUT = ow** TSD = Floating ATC = ow **Opposite of data sheet for operation with UniSIC14 FIGURE 3. RING ACCESS AND RING RETURN SWITC VERIFICATION INPUT = ow** then igh** TSD = Floating ATC = ow **Opposite of data sheet for operation with UniSIC14 R1 Discussion The Ring Access switch () of the IS5571A is an. The operation of this requires that the current through it approach zero to enable the to unlatch (turn off). Figure 4 illustrates the condition where the logic has been configured to turn off, yet it remains on due to the DC voltage R1 R2 R2 FIGURE 4. IUSTRATION WEN REMAINS ON AN9870 Rev 0.00 Page 2 of 7

3 IS5571A/BEVA1 connected to it. To turn off, open all the switches by taking the TSD pin low. Note: In normal line card applications the Ring Access switch is connected to an AC ring generator. The zero current crossing of the AC signal will enable to turn OFF. The maximum time for and to simultaneous be ON is 25msec for a 20z ring generator. Setup 1. Configure the logic switches as follows: TSD = ow, INPUT = igh and the ATC = ow, as defined on the Note: With TSD pin ow the IS5571A will be in the A OFF state. This means that the ine Break switches, Ring Access switch and Ring Return switch will all be OFF (Open). 2. Connect the power supplies to the Evaluation 4. Configure mother board in the ED mode by setting the MODE switch in the ED position. 5. Verify that both ED s ( and ) are off. 6. Set the TSD switch to the floating position. 7. Verify that the ine Break ED () is on. This indicates that both ine Break switches are ON (Closed) and functioning correctly. (INPUT = igh) Reference Figure Set the ATC switch to the high position. Verify that the ine Break ED () is still on. 9. Toggle the INPUT switch back and forth, observing that the ine Break ED () remains on while the Ring Access ED () remains off. Note: When the ATC is taken high, while the INPUT is high, the IS5571A ine Break switches will be permanently latched in the ON (closed) position. The IS5571A will no longer respond to logic level changes at the INPUT pin. This verifies that the ATC is functioning correctly. 10. Set TSD switch low. Verify that both EDs are off.this verifies that taking the TSD pin low overrides all other logic controls and is functioning correctly. 11. Set the INPUT and ATC switches low and the TSD switch in the floating position. Verify the Ring Access ED () is on and the ine Break ED () is off. This indicates that the Ring Access and Ring Return switches are ON (Closed) and are functioning correctly. Reference Figure Set the ATC switch to the high position. Verify that the Ring Access ED () is still on. 13. Toggle the INPUT switch back and forth, observing that the Ring Access ED () remains on while the ine Break ED () remains off. This verifies that the latch feature of the IS5571A is functioning correctly. Note: When the ATC is taken high, while the INPUT is low, the IS5571A Ring Access and Ring Return switches will be permanently latched in the ON (closed) position. The IS5571A will no longer respond to logic level changes at the INPUT pin. 14. Set the INPUT switch low and the ATC switch low. Verify that the Ring Access ED () is still on. 15. Set the TSD switch low. Verify that the ED and are off. This once again verifies that taking the TSD pin low overrides all other logic controls and is functioning correctly. 16. Set the TSD switch in the floating position and verify that the Ring Access switch ED () is back on. 17. Set the INPUT switch to the high position. Verify that both the ine Break ED () and the Ring Access ED () are both on. Reference Figure 4 and discussion of above. 18. Set the TSD switch low. Verify that both EDs are off. 19. Set the TSD switch in the floating position and verify that the ED is on. This verifies that the Ring Access switch turned off when its current went to zero. Test #2, Normal Mode Verification In the NORMA mode, the on resistance (r ON ), the current limiting and the thermal shutdown features of the MOSFET type switches (,, ) will be evaluated. This section will also demonstrate the operation of the IS5571A when ringing a phone. Equipment Requirements The following equipment is required: One 50V 500mA DC power supply One Ohm meter One DC current meter One DC volt meter. To illustrate the operation of the switch when ringing a phone, the following additional equipment will be required: One battery backed 20z 90V RMS ring generator referenced to offset One phone. r ON Verification of the IS5571A MOSFET Type Switches (,, ) 1. Configure the logic switches as follows: TSD = low, INPUT = high and the ATC = low, as defined on the 2. Connect the power supplies to the Evaluation 4. Configure mother board in the NORMA mode by setting the MODE switch in Normal position. 5. Set the TSD = Floating. 6. Measure the r ON resistance of ine Break switch by connecting the positive terminal of an Ohm meter at TINE (J1) and the negative terminal at TBAT (J8). r ON should measure approximately Measure the r ON resistance of ine Break switch by connecting the positive terminal of the Ohm meter at RINE (J2) and the negative terminal at RBAT (J9). r ON should also measure approximately Set the INPUT switch = low. AN9870 Rev 0.00 Page 3 of 7

4 IS5571A/BEVA1 9. Measure the r ON resistance of Ring Return switch by connecting the positive terminal of an Ohm meter at TINE (J1) and the negative terminal at GND (J6). r ON should measure approximately Note: The IV characteristics of an () has a diode offset through the origin. Because of this offset, a digital Ohm meter can not be used to measure the on resistance of this switch. Current imit verification of the IS5571A MOSFET type switches (,, ), and the operation of the TSD pin as an indication that the switch has entered Thermal Shutdown. 1. Configure the logic switches as follows: TSD = low, INPUT = high and the ATC = low, as defined on the 2. Connect the power supplies to the Evaluation 4. Configure mother board in the NORMA mode by setting the MODE switch in Normal position. 5. Connect TBAT (J8) to the GND terminal (J6). 6. To measure the current limit of, connect the positive terminal of an external voltage source (V S ) through an amp meter to the TINE terminal (J1). Connect the negative terminal of V S to GND (J6). Start with V S voltage set to zero volts. 7. Connect the positive terminal of a DC volt meter to the TSD banana jack (J10) and the negative terminal to GND (J6). The expected voltage reading is 0 volts. 8. Set the logic switch TSD in the floating position. Verify that the TSD voltage is approximately 5 volts. 9. Slowly increase the V S voltage while monitoring the current through the amp meter. At approximately around 156mA the switch will enter into current limit. When current through the switch reaches the current limit of the switch, the current is clamped and held at a constant value. The switch then operates as a constant current source. Increasing the voltage beyond this point will not change the value of this current. As the temperature of the device increases the DC current limit of the switch will decrease. 10. Continue to increase the V S voltage until the TSD voltage starts to cycle between 5V and ground (approximately 40V- 50V). The switch is now in Thermal Shutdown. 11. Return the V S supply voltage to 0V. 12. Set the INPUT logic switch to low (Ring Return switch on). 13. Verify that the TSD Voltage is approximately 5V. 14. To measure the current limit of, start with the V S voltage set to zero volts. 15. Slowly increase the V S voltage while monitoring the current through the amp meter. At approximately around 200mA the switch will enter into current limit. When current through the switch reaches the current limit of the switch, the current is clamped and held at a constant value. The switch then operates as a constant current source. Increasing the voltage beyond this point will not change the value of this current. As the temperature of the device increases the DC current limit of the switch will decrease. 16. Continue to increase the V S voltage until the TSD voltage starts to cycle between 5V and ground (approximately 20V). The switch is now in Thermal Shutdown. 17. Return the V S supply voltage to 0V. 18. Set the INPUT logic switch to igh (ine Break switches on). 19. Verify that the TSD Voltage is approximately 5V. 20. Connect RBAT (J9) to the GND terminal (J6). 21. To measure the current limit of, move the positive terminal of V S to the RINE terminal (J2). Start with V S voltage set to zero volts. 22. Slowly increase the V S voltage while monitoring the current through the amp meter. At approximately around 156mA the switch will enter into current limit. When current through the switch reaches the current limit of the switch, the current is clamped and held at a constant value. The switch then operates as a constant current source. Increasing the voltage beyond this point will not change the value of this current. As the temperature of the device increases the DC current limit of the switch will decrease. 23. Continue to increase the V S voltage until the TSD voltage starts to cycle between 5V and ground (approximately 40V- 45V). The switch is now in Thermal Shutdown. 24. Return the V S supply voltage to 0V. Ringing a Phone with the IS5571A 1. Configure the logic switches as follows: TSD = low, INPUT = high and the ATC = low, as defined on the Note: With TSD grounded the IS5571A will be in the A OFF state. This means that the ine Break switches, Ring Access switch and Ring Return switch will all be OFF (Open). 2. Connect the power supplies to the Evaluation 4. Configure mother board in the NORMA mode by setting the MODE switch in Normal position. 5. Connect the telephone to the RJ11 phone jack (J12). 6. Connect the battery backed Ring Generator to the ring generator BNC (J11) on the mother Set the ring generator to 20z 90V RMS referenced to a offset. 7. Set TSD switch in the floating position. 8. Set the INPUT switch low and the phone will begin to ring. 9. Set the INPUT switch high and the phone will stop ringing. 10. Toggling the INPUT switch will simulate a normal phone cadence. AN9870 Rev 0.00 Page 4 of 7

5 IS5571A/BEVA1 J5 J7 J6 V DD VBAT GND J11 RING GENERATOR J1 T INE NC F2 3 NC 6 U1 INE BREAK RING RETURN D J8 T BAT ED J2 R INE Q1 R 1 R 2 D1 D2 14 F1 RING ACCESS D2 INE BREAK CONTRO OGIC NORMA J9 R BAT NC NC NC NC A R 4 ED INEBREAK SWITCES R 5 ED RING ACCESS SWITCES S1 INPUT J3 S2 ATC J4 S3 SPST FOAT TSD J10 FIGURE 5. IS5571A DEMO BOARDS SCEMATIC TABE 1. CIRCUIT COMPONENT IST DAUGTER BOARD COMPONENT VAUE TOERANCE RATING Complete Daughter Card IS5571A/B-DBEVA1 N/A N/A U1 - IS5571A IS5571AIB N/A N/A D1 - Teccor SIDACtor P2000SC N/A N/A D2 - Teccor SIDACtor P1200SC N/A N/A F1, F2 Teccor Telelink Fuses F1250T N/A N/A Q1 - Transistor IRFD120 N/A N/A R1 - Drain Current imiting Resistor 10% 1/16 W R2 - Pull-Up Resistor for the UniSIC14 1k 10% 1/16W R3 Not Populated N/A N/A AN9870 Rev 0.00 Page 5 of 7

6 IS5571A/BEVA1 MOTER BOARD COMPONENT VAUE TOERANCE RATING Complete Mother Board IS5571A/BEVA1 REV A N/A N/A R4, R5 - ED Current imiting Resistor 10% 1/2 W, - ED Red N/A N/A AN9870 Rev 0.00 Page 6 of 7

7 Notice 1. Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of semiconductor products and application examples. You are fully responsible for the incorporation or any other use of the circuits, software, and information in the design of your product or system. Renesas Electronics disclaims any and all liability for any losses and damages incurred by you or third parties arising from the use of these circuits, software, or information. 2. Renesas Electronics hereby expressly disclaims any warranties against and liability for infringement or any other claims involving patents, copyrights, or other intellectual property rights of third parties, by or arising from the use of Renesas Electronics products or technical information described in this document, including but not limited to, the product data, drawings, charts, programs, algorithms, and application examples. 3. No license, express, implied or otherwise, is granted hereby under any patents, copyrights or other intellectual property rights of Renesas Electronics or others. 4. You shall not alter, modify, copy, or reverse engineer any Renesas Electronics product, whether in whole or in part. Renesas Electronics disclaims any and all liability for any losses or damages incurred by you or third parties arising from such alteration, modification, copying or reverse engineering. 5. Renesas Electronics products are classified according to the following two quality grades: Standard and igh Quality. The intended applications for each Renesas Electronics product depends on the product s quality grade, as indicated below. "Standard": Computers; office equipment; communications equipment; test and measurement equipment; audio and visual equipment; home electronic appliances; machine tools; personal electronic equipment; industrial robots; etc. "igh Quality": Transportation equipment (automobiles, trains, ships, etc.); traffic control (traffic lights); large-scale communication equipment; key financial terminal systems; safety control equipment; etc. Unless expressly designated as a high reliability product or a product for harsh environments in a Renesas Electronics data sheet or other Renesas Electronics document, Renesas Electronics products are not intended or authorized for use in products or systems that may pose a direct threat to human life or bodily injury (artificial life support devices or systems; surgical implantations; etc.), or may cause serious property damage (space system; undersea repeaters; nuclear power control systems; aircraft control systems; key plant systems; military equipment; etc.). Renesas Electronics disclaims any and all liability for any damages or losses incurred by you or any third parties arising from the use of any Renesas Electronics product that is inconsistent with any Renesas Electronics data sheet, user s manual or other Renesas Electronics document. 6. When using Renesas Electronics products, refer to the latest product information (data sheets, user s manuals, application notes, General Notes for andling and Using Semiconductor Devices in the reliability handbook, etc.), and ensure that usage conditions are within the ranges specified by Renesas Electronics with respect to maximum ratings, operating power supply voltage range, heat dissipation characteristics, installation, etc. Renesas Electronics disclaims any and all liability for any malfunctions, failure or accident arising out of the use of Renesas Electronics products outside of such specified ranges. 7. Although Renesas Electronics endeavors to improve the quality and reliability of Renesas Electronics products, semiconductor products have specific characteristics, such as the occurrence of failure at a certain rate and malfunctions under certain use conditions. Unless designated as a high reliability product or a product for harsh environments in a Renesas Electronics data sheet or other Renesas Electronics document, Renesas Electronics products are not subject to radiation resistance design. You are responsible for implementing safety measures to guard against the possibility of bodily injury, injury or damage caused by fire, and/or danger to the public in the event of a failure or malfunction of Renesas Electronics products, such as safety design for hardware and software, including but not limited to redundancy, fire control and malfunction prevention, appropriate treatment for aging degradation or any other appropriate measures. Because the evaluation of microcomputer software alone is very difficult and impractical, you are responsible for evaluating the safety of the final products or systems manufactured by you. 8. Please contact a Renesas Electronics sales office for details as to environmental matters such as the environmental compatibility of each Renesas Electronics product. You are responsible for carefully and sufficiently investigating applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoS Directive, and using Renesas Electronics products in compliance with all these applicable laws and regulations. Renesas Electronics disclaims any and all liability for damages or losses occurring as a result of your noncompliance with applicable laws and regulations. 9. Renesas Electronics products and technologies shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations. You shall comply with any applicable export control laws and regulations promulgated and administered by the governments of any countries asserting jurisdiction over the parties or transactions. 10. It is the responsibility of the buyer or distributor of Renesas Electronics products, or any other party who distributes, disposes of, or otherwise sells or transfers the product to a third party, to notify such third party in advance of the contents and conditions set forth in this document. 11. This document shall not be reprinted, reproduced or duplicated in any form, in whole or in part, without prior written consent of Renesas Electronics. 12. Please contact a Renesas Electronics sales office if you have any questions regarding the information contained in this document or Renesas Electronics products. (Note 1) Renesas Electronics as used in this document means Renesas Electronics Corporation and also includes its directly or indirectly controlled subsidiaries. (Note 2) Renesas Electronics product(s) means any product developed or manufactured by or for Renesas Electronics. (Rev November 2017) SAES OFFICES Refer to " for the latest and detailed information. Renesas Electronics America Inc Murphy Ranch Road, Milpitas, CA 95035, U.S.A. Tel: , Fax: Renesas Electronics Canada imited 9251 Yonge Street, Suite 8309 Richmond ill, Ontario Canada 4C 9T3 Tel: Renesas Electronics Europe imited Dukes Meadow, Millboard Road, Bourne End, Buckinghamshire, S8 5F, U.K Tel: , Fax: Renesas Electronics Europe Gmb Arcadiastrasse 10, Düsseldorf, Germany Tel: , Fax: Renesas Electronics (China) Co., td. Room 1709 Quantum Plaza, No.27 Zhichunu, aidian District, Beijing, P. R. China Tel: , Fax: Renesas Electronics (Shanghai) Co., td. Unit 301, Tower A, Central Towers, 555 angao Road, Putuo District, Shanghai, P. R. China Tel: , Fax: Renesas Electronics ong Kong imited Unit , 16/F., Tower 2, Grand Century Place, 193 Prince Edward Road West, Mongkok, Kowloon, ong Kong Tel: , Fax: Renesas Electronics Taiwan Co., td. 13F, No. 363, Fu Shing North Road, Taipei 10543, Taiwan Tel: , Fax: Renesas Electronics Singapore Pte. td. 80 Bendemeer Road, Unit #06-02 yflux Innovation Centre, Singapore Tel: , Fax: Renesas Electronics Malaysia Sdn.Bhd. Unit 1207, Block B, Menara Amcorp, Amcorp Trade Centre, No. 18, Jln Persiaran Barat, Petaling Jaya, Selangor Darul Ehsan, Malaysia Tel: , Fax: Renesas Electronics India Pvt. td. No.777C, 100 Feet Road, A 2nd Stage, Indiranagar, Bangalore , India Tel: , Fax: Renesas Electronics Korea Co., td. 17F, KAMCO Yangjae Tower, 262, Gangnam-daero, Gangnam-gu, Seoul, Korea Tel: , Fax: Renesas Electronics Corporation. All rights reserved. Colophon 7.0