Evaluation Kit for ADM1170, ADM1171, ADM1172 EVAL-ADM1170/ADM1171/ADM1172 PRODUCT DESCRIPTION This evaluation board allows the ADM1170, ADM1171, and ADM1172 to be easily evaluated. These parts are hot swap controllers with enable input and gate pin output to drive an external FET. The hot swap control circuitry allows the boards to be safely inserted and removed from a live 1.6 V to 16.5 V backplane. The parts provide precise, robust, current-limiting protection against transient and nontransient short circuits as well as undervoltage and overcurrent conditions. In addition to the standard hot swap functionality, the ADM1170 has an additional supply pin that allows voltage monitoring on a supply rail to go as low as 1.6 V. The ADM1171 features a current sense output (CSOUT) pin. The voltage on the CSOUT pin represents the voltage drop across the sense resistor gained up by a factor of 20. Both ADM1170 and ADM1171 feature a soft start function that provides the user with a capacitor programmable ramping reference to the internal current-sense comparator. This provides a linearly increasing current limit at startup at a rate set by the soft start capacitor (CSS), which helps to reduce and limit large inrush currents. The ADM1172 features a power-fail comparator. The voltage on the PFI pin is compared with an internal 0.6 V reference, and the output of this comparator is presented on the PFO pin. All these devices are available in two options: the ADM117x-1 with automatic retry for overcurrent fault and the ADM117x-2 with latch-off for an overcurrent fault. Toggling the ON (ONCLR) pin resets a latched fault. All parts are packaged in an 8-lead TSOT. Order codes for evaluation kits are shown in the Ordering Guide. (Pinouts and detailed package drawings can be found in the individual product data sheets.) EVALUATION BOARD DESCRIPTION The ADM1170/ADM1171/ADM1172 hot swap controller evaluation board contains all the necessary components for evaluating all features of the devices. This board requires a bench power supply of between 2.7 V and 16.5 V, connected through J1 and J3 or, alternatively, through the corresponding connectors on J4. This board is capable of evaluating the ADM1170, ADM1171, and ADM1172 parts by simply changing certain connectors to suit specific evaluation plan. Download the latest version of the configuration tool from Analog Devices, Inc., at www.analog.com/powermonitorsw. PACKAGE CONTENTS ADM1170/ADM1171/ADM1172 main evaluation board ADM1170, ADM1171, and ADM1172 device samples Rev. 0 Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of evaluation boards. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Analog Devices reserves the right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Evaluation boards are not authorized to be used in life support devices or systems. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.461.3113 ©2008 Analog Devices, Inc. All rights reserved. EVAL-ADM1170/ADM1171/ADM1172 TABLE OF CONTENTS Product Description ......................................................................... 1 Timer Block ....................................................................................6 Evaluation Board Description......................................................... 1 Sense Resistor and FET ................................................................6 Package Contents .............................................................................. 1 Current Sense Output (CSO).......................................................6 Revision History ............................................................................... 2 PFI/PFO Block ...............................................................................6 Evaluation Board Hardware ............................................................ 3 LEDs ................................................................................................6 Hardware Components................................................................ 3 Pin Access .......................................................................................6 Switch, Jumper, and LED Functions .......................................... 3 Additional Components ...............................................................6 Operating the Evaluation Board ..................................................... 5 Evaluation Board Schematic ............................................................7 Additional Features ...................................................................... 5 Ordering Information .......................................................................8 Powering the Evaluation Board .................................................. 5 Bill of Materials ..............................................................................8 ON (On-CLR) Input Block ......................................................... 6 Ordering Guide .............................................................................9 Soft Start Capacitors Block .......................................................... 6 ESD Caution...................................................................................9 REVISION HISTORY 6/08—Revision 0: Initial Version Rev. 0 | Page 2 of 12 EVAL-ADM1170/ADM1171/ADM1172 EVALUATION BOARD HARDWARE HARDWARE COMPONENTS Main Evaluation Board Device Samples The evaluation board contains all of the circuitry necessary to simulate real hot swap events such as a hot swap control FET, sense resistor, and timing components. It also has an adjustable resistor circuit to evaluate the performance of the power-fail comparator for the ADM1172 part. Some loose samples of the device to be evaluated are included in a samples box. A single device should be placed in the socket before powering up the evaluation board. The device should be orientated in the socket such that Pin 1 is in the top left corner, near to U3. SWITCH, JUMPER, AND LED FUNCTIONS Table 1. Connector Functions Switch S1 S1-ON S1-OFF S1-TOGGLE S1_TIMER S1-1 S1-2 S1-3 S1-4 S2-S S2-1 S2-2 S2-3 S2-4 Description ON (ON-CLR) pin setting switch Device enable Device disable Reset a latched fault (for ADM1170, ADM1171, and ADM1172 parts) Timer pin setting switch Connects to a 22 nF capacitor, enables 5.7 ms initial delay and 476.6 μs circuit breaker delay Connects to a 47 nF capacitor, enables 12.2 ms initial delay and 1.01 ms circuit breaker delay Connects to a 470 nF capacitor, enables 122.2 ms initial delay and 10.18 ms circuit breaker delay Connects empty footprint for user-defined capacitor (CT4) on the TIMER pin Soft start pin setting switch (ADM1170 and ADM1171 only) Connects to a 1 nF capacitor, allowing 100 μs ramp-up delay Connects to a 10 nF capacitor, allowing 1 ms ramp-up delay Connects to a 47 nF capacitor, allowing 4.7 ms ramp-up delay Connects empty footprint for user-defined capacitor (CS4) on the SS pin Default On Closed Open Open Open Closed Open Open Open Table 2. Jumper Functions Jumper LK_ON LK_VCC LK_PFI PFI_IN Description Insert to enable manual enable/disable/reset control using Switch S1 or logic input on J1-1 (when S1 is on); deassert to use external logic signals on Connector J4-7 to control device enable/disable/reset Applies to the ADM1170; insert to power device from mail power rail; deassert to power device from Connector J4-1 for low voltage monitoring mode Applies to the ADM1172; link between the PFI pin and Potentiometer VR1; this allows the user to evaluate the performance of PFI on voltage input or voltage output; deassert if using Connector J4-8 for PFI input Applies to the ADM1172; allow VIN (Position A) or VOUT (Position B) to be linked with the PFI pin through Potentiometer VR1 Table 3. LED Functions LED D1 D2 D4 D5 Name ON indicator PFO indicator VOUT indicator VIN indicator Description Indicates if the device is enabled Indicates if the PFO output is present Indicates if the output voltage is present Indicates if the supply voltage is present Rev. 0 | Page 3 of 12 Default Inserted Insert for ADM1170 Insert for ADM1172 Position B EVAL-ADM1170/ADM1171/ADM1172 To configure an evaluation board to a specific device ensure the links in Table 4 are inserted. Table 4. Configuration Links Link CL1 CL2 CL3 CL4 CL5 CL6 Description Configuration link applies to ADM1170 and ADM1171 Configuration link applies to ADM1170 Configuration link applies to ADM1171 and ADM1172 Configuration link applies to ADM1172 Configuration link applies to ADM1171 and ADM1172 Configuration link applies to ADM1170 Table 5. Soft Start Capacitor Value and Delay Time Reference to the Configuration of Switch S2_S Switch 1 2 3 4 Capacitor Value 1 nF 10 nF 47 nF User Defined Delay Time 100 μs 1 ms 4.7 ms User Defined Table 6. Timer Capacitor Value and Delay Time Reference to the Configuration of Switch S1_TIMER Switch 1 2 3 4 Capacitor Value 22 nF 47 nF 470 nF User Defined Initial Delay—tINITIAL 5.7 ms 12.2 ms 122.2 ms User Defined Rev. 0 | Page 4 of 12 Circuit Breaker Delay—tCB 476.6 us 1.01 ms 10.18 ms User Defined EVAL-ADM1170/ADM1171/ADM1172 OPERATING THE EVALUATION BOARD RSENSE 33mΩ TIMER CAPACITORS HOT SWAP FET LOAD+ VCC VCC/SENSE+ LINK SOFT START CAPACITORS PIN ACCESS (J4) PFI/PFO GATE NODE LOAD– ON (ON-CLR) INPUT BLOCK ADM1170 SOCKET 07418-001 GND Figure 1. Evaluation Board ADM1171 The ADM1170, ADM1171, and ADM1172 devices are integrated hot swap controllers and current-sense amplifiers. An internal current-sense amplifier senses voltage across the sense resistor in the power path via the VCC and SENSE pins (SENSE+ and SENSE− pins for the ADM1170). The ADM1170, ADM1171, and ADM1172 limit the current through this resistor by controlling the gate voltage of an external N-channel FET in the power path via the GATE pin. The sense voltage (and hence the inrush current) is kept below a preset maximum. The ADM1170, ADM1171, and ADM1172 protect the external FET by limiting the time that it spends with the maximum current running in it. This current-limit period is set by the choice of capacitor attached to the TIMER pin. Additionally, the device provides protection from overcurrent events at times after the hot swap event is complete. In the case of a short-circuit event, the current in the sense resistor exceeds an overcurrent trip threshold, and the FET is switched off immediately by pulling down the GATE pin. The ADM1170, ADM1171, and ADM1172 are packaged in an 8-lead TSOT. The ADM171 has a current sense output (CSOUT) pin. The voltage on the CSOUT pin represents the voltage drop across the sense resistor gained up by a factor of 20. It also contains a soft start function, which provides a capacitor programmable ramping reference to the internal current sense comparator. ADM1172 The ADM1172 has a power-fail comparator output, for which the voltage on the PFI pin is compared with an internal 0.6 V reference, and the output of this comparator is presented on the PFO pin. POWERING THE EVALUATION BOARD The ADM1170/ADM1171/ADM1172 evaluation board is powered using a bench supply of between 2.7 V and 16.5 V, connected to J1 _VIN and J3_ GND for ground. In this case, the device is powered from the voltage input rail. Alternatively, connectors on J4 can be used to power up the device. The load can be connected between the red and black connectors, J5_VOUT and J4_GND respectively. ADDITIONAL FEATURES ADM1170 The ADM1170 has an additional supply pin that allows voltage monitoring on a supply rail to go as low as 1.6 V, and a soft start function, which provides a capacitor programmable ramping reference to the internal current-sense comparator. Rev. 0 | Page 5 of 12 EVAL-ADM1170/ADM1171/ADM1172 The ADM1170 has a separate VCC pin and a SENSE+ pin, which allow the device to hot swap low voltage rails while being powered from a different supply. Jumper LK_VCC allows VCC to be shorted to SENSE+ in order to power the device and hot swap from the same rail (J1_VIN). By deasserting LK_VCC, the ADM1170 device can be powered through the VCC pin on the J4 connector block; this enables the device to monitor a low level voltage input from Connector J1_VIN or the VIN pin on the J4 connector block. ON (ON-CLR) INPUT BLOCK The ADM1170, ADM1171, and ADM1172 are available in two options ADM1170-1, ADM1171-1, ADM1172-1 and ADM1170-2, ADM1171-2, ADM1172-2. The ADM1170-1, ADM1171-1, and ADM1172-1 have an autoretry function that keeps retrying to clear a fault and the ADM1170-2, ADM1171-2, and ADM1172-2 latch off until the ON pin is toggled. If Jumper LK_ON is inserted, S1 is connected to the ON (ON-CLR) pin. Remove this jumper to connect an external signal to the pin using the J4 pin connect block. Note there is also a 2-pin input connector (J1) located near the S1 switch, which also allows the user to connect an ON (ON-CLR) signal to the device without removing the jumper. The green LED (D1) is used to indicate the status of the pin. SOFT START CAPACITORS BLOCK The ADM1170 and ADM1171 have a soft start function to limit the inrush current by controlling the rate at which the gate ramps up. This is achieved by slowly increasing the ILIMIT voltage from 0 mV to 50 mV via a current of 10 μA being injected into the soft start capacitor. When the voltage reached 1 V on the SS pin then the ILIMIT is at its normal operation of 50 mV. This pin can also be accessed by the J4 block connector where it can be used to reduce the fault limit on the device by overdriving or clamping the voltage. The ADM1170 limits current when 50 mV is reached across the SENSE+ and SENSE− pins (VCC and SENSE pins for ADM1171 and the ADM1172). There are three capacitors connectable via dipswitches (S2_S) on the board and another empty footprint for any additional capacitors. A capacitor is chosen as follows: t = V × C/I where: t is the time required to reach a normal 50 mV limit. V is 1 V. C is a capacitor. I is 10 μA. Thus, C = t × 10 × 10−6. Table 5 shows the available options. TIMER BLOCK The ADM1170, ADM1171, and ADM1172 are available in both autoretry and latched-off versions, ADM1170-1, ADM1171-1, ADM1172-1 and ADM1170-2, ADM1171-2, and ADM1172-2, respectively. The TIMER capacitor is used to control both the startup timing cycle and the circuit breaker delay. The timing delays are calculated by the following equations: tINITIAL = 1.3 V × CTIMER/5 μA tCB = 1.3 V × CTIMER/60 μA Table 6 shows the available dip switch (S1_TIMER) options. SENSE RESISTOR AND FET There is a 33 mΩ sense resistor fitted as standard and a typical FET, details of both are found in the Bill of Materials. However, footprints are supplied to easily change the FET and sense resistor to the many different common footprints that may be required. CURRENT SENSE OUTPUT (CSO) For the ADM1171, the CSOUT pin can be monitored through the block connector J4, pin labeled PIN6. PFI/PFO BLOCK The ADM1172 has an integrated comparator and reference allowing the user to monitor the voltage for power-fail conditions. Jumper LK_PFI allows the user to select between input or output voltage monitoring. The threshold can be set using Potentiometer VR1. Jumper PFI_IN is used to isolate the output of VR1 from the PFI pin of the ADM1172. This may be required when another voltage needs to be monitored or an external resistor divider is used. The PFO LED shows the status of the PFO output. LEDS A green LED located near the VIN and VOUT connectors is used to indicate if power is present. Switch S1 also has a green LED located nearby to indicate the status of the ON (ON-CLR) pin. These LEDs are powered from a LED driver circuit, which ensures a constant level of brightness across the various supply voltage ranges. PIN ACCESS Pin access is available through a connector block (J4) on the left edge of the board. ADDITIONAL COMPONENTS Additional components can be placed in the center of the board where holes have been placed (see the outlined section in the center of the board in Figure 1). Access to all pins is available through the top row. There is also such an area at the right edge of the board to allow loads to be soldered to the board. Rev. 0 | Page 6 of 12 EVAL-ADM1170/ADM1171/ADM1172 EVALUATION BOARD SCHEMATIC ( ) 07418-002 Figure 2. Board Schematic Rev. 0 | Page 7 of 12 EVAL-ADM1170/ADM1171/ADM1172 ORDERING INFORMATION BILL OF MATERIALS Table 7. Qty 1 1 1 1 6 1 1 2 1 1 1 1 3 1 1 Reference Designator C1 C2 C5 C6 CL1, CL2, CL3, CL4, CL5, CL6 CS1 CS2 CS3, CT2 CS4 CT1 CT3 CT4 D1, D4, D5 D2 D3 1 4 1 1 3 J1 J1_VIN, J3_GND, J4_GND, J5_VOUT J4 L1 LK_ON, PFI_IN, LK_VCC 1 LK_PFI 4 1 1 1 4 1 1 1 2 1 1 2 Q1, Q3, Q5, Q6 Q2 Q4 R1 R8, R9, R10, R11 R2 R6 R17 R22, R23 RS1 S1 S1_TIMER, S2_S 15 T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T14, T15, T16, T_GND, T_VIN VR1 U1 U2 U3 U6 1 1 1 1 1 Description 0.1 μF capacitor, 0805 100 nF 50 V Not placed 10 μF capacitor, Case B 10 μF 20 V 10 μF capacitor, Case A 10 μF 6.3 V 0Ω 1 nF capacitor, 0805 50 V 10 nF capacitor, 0805 50 V 47 nF capacitor, 0805 50 V Not placed 22 nF capacitor, 0805 50 V 470 nF capacitor, 1206, 25 V Not placed LED, SMD green LED, SMD red Custom generic Zener-diode add-in if operated with a high noise supply Terminal block, PCB 2-way Socket, 4 mm PCB red Terminal block, PCB 3-way 100 μH inductor, 1210 Header, 1 row 2-way Jumper socket, red Header, 1 row 3-way Jumper socket, red MOSFET, N-channel SOT-23 MOSFET, N-channel D-PAK Transistor, NPN SOT-23 22 Ω resistor, 0805 10 kΩ resistor, 0805 1 kΩ resistor, 0805 100 kΩ resistor, 0805 100 Ω resistor, 0805 0 Ω resistor, 0805 0.033 Ω resistor, 1206 Switch, slide SP 2 POS VERT Switch, DIP 4-way Manufacturer Multicomp Manufacturer Number U0805R104KCT AVX AVX TAJB106K020R TAJA106K006R Multicomp Multicomp Multicomp U0805R102KCT U0805R103KCT U0805R473KCT Multicomp Multicomp U0805R223KCT T1206R474KCT Kingbright Corp. Kingbright Corp. KP-2012SGC KP-2012SRC-PRV Generic Zener diode Lumberg Automation Deltron, LLC. Lumberg Automation Murata Electronics Harwin KRM 02 571-0500-01 KRM 03 LQH32MN101J23L M20-9990246 M7566-05 M20-9990346 M7566-05 NDS355AN IRFR3518PBF FMMT617 MC 0.1W 0805 1% 22R MC 0.1W 0805 1% 10k MC 0.1W 0805 1% 1K MC 0.1W 0805 1% 100K MC 0.1W 0805 1% 100R MC 0.1W 0805 0R TL2BR033FTE STSSS9121 GDH04S Harwin Terminal, PCB black PK100 Fairchild Semiconductor International Rectifier Zetex, Inc. Multicomp Multicomp Multicomp Multicomp Multicomp Multicomp Tyco Electronics ALPS ELECTRIC CO., LTD. Tyco Electronics/ Alcoswitch Vero Technologies 20-2137 Trimmer, 10 kΩ ADM1170/ADM1171/ADM1172 IC, SM LED driver SOT-23, 8-pin socket IC, SM 1.5 A LDO regulator Vishay Spectrol Analog Devices Zetex, Inc. Loranger Intl National Semiconductor 63M-T607-103 ADM117x ZXSC300E5TA 04334 081 6215 LM1086CS-ADJ Rev. 0 | Page 8 of 12 EVAL-ADM1170/ADM1171/ADM1172 ORDERING GUIDE Model EVAL-ADM1170EBZ1 EVAL-ADM1171EBZ1 EVAL-ADM1172EBZ1 1 ESD CAUTION Description ADM1170 Evaluation Board ADM1171 Evaluation Board ADM1172 Evaluation Board Z = RoHS Compliant Part. Rev. 0 | Page 9 of 12 EVAL-ADM1170/ADM1171/ADM1172 NOTES Rev. 0 | Page 10 of 12 EVAL-ADM1170/ADM1171/ADM1172 NOTES Rev. 0 | Page 11 of 12 EVAL-ADM1170/ADM1171/ADM1172 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB07418-0-6/08(0) Rev. 0 | Page 12 of 12