DEMO MANUAL DC2307A LT1910 Protected High Side MOSFET Driver Description Demonstration circuit 2307A is a high input voltage protected high side MOSFET driver featuring the LT®1910ES8. This demo board has a wide input voltage range from 8V to 48V and is capable of protecting a voltage source against a short circuit. This demo board uses an installed 2.43kΩ load resistor to demonstrate the functionality of the LT1910 in a standalone mode without external loads. An additional resistive load can be connected to the terminals E6 (VOUT) and E7 (GND). The DC2307A is setup to switch pure resistive loads. If there is a need for verification to switch capacitive loads, then optional circuitry can be installed using C_LOAD capacitor and R7. The ability to switch inductive loads can also be verified by placing an inductive load over the C_LOAD footprint and using diode D4 for dissipating inductive energy at turn-off of the MOSFET switch Q2. The DC2307A supports two types of short-circuit protection: one with automatic restart and the other with automatic restart defeat. The DC2307A is set up for automatic restart during a short circuit condition. However, automatic restart can be disabled by installing a 2kΩ resistor for R8. Performance Summary PARAMETER The setup for DC2307A evaluation is shown in Figure 1. Sync pulses can be applied to terminals E4 (SYNC) E5 (GND) for synchronization to an external clock. In this case, the DC2307A supports a low bandwidth PWM. Figure 2 illustrates functionality of such solution with 100Hz switching frequency. Figure 3 shows the waveforms of the high side switch driver during a short-circuit with automatic restart. The LT1910 has a 50mV trip point for the selection of the current sense resistor RS1. The current sense resistor RS1 installed on the board is 0.1Ω, 1206 package. However, the RS1 footprint supports multiple sizes from 0805 to 2512. However, the RS1 footprint supports multiple sizes and can be replaced with up to a 2W device. The LT1910 data sheet gives a complete description of this part, operation and application information and must be read in conjunction with this demo manual. Design files for this circuit board are available at http://www.linear.com/demo/DC2307A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25°C CONDITIONS/NOTES Minimum Input Voltage VALUE 8 Maximum Input Voltage UNIT V 48 V Turn On-Time VIN = 24V, RUN from OFF to ON <75 µs Turn Off-Time VIN = 24V, RUN from ON to OFF <10 µs Maximum Output Current RS1 = 0.1Ω, VIN = 24V 0.6 A Maximum Output Current RS1 = 0.01Ω, VIN = 24V 6.0 A dc2307afa 1 DEMO MANUAL DC2307A Quick Start Procedure Demonstration circuit 2307A is easy to set up to evaluate the performance of the LT1910. Set up the circuit according to the diagram in Figure 1. Before proceeding to test, insert a shunt in header JP1, (RUN) into OFF position, which connects the RUN pins to ground (GND), and thus, shuts down the output. 1.With the DC2307A set up according to the proper measurement and equipment as shown in Figure 1, apply 20V at E1 (VIN). Measure VOUT; it should read 0V. 2.Turn on the protected high side MOSFET driver by inserting the shunt in header JP1 (RUN) into the ON position. Measure VOUT; it should read 20V. Vary VIN in the available range, and measure the corresponding VOUT. (Do not apply more than the rated maximum voltage of 48V to the board or the part may be damaged). 3.Repeat turning on and off LTC1910, by inserting the shunt in header JP1 (RUN), and measure VIN and VOUT. 4.For verification of the ability of LT1910 to be synced with an external clock, remove the shunt from JP1 (RUN) header and apply a low bandwidth sync signal to terminals E4 (SYNC) E5 (GND). (Do not apply frequencies greater than 1kHz.) Figure 1. Proper Measurement Equipment Setup 2 dc2307afa DEMO MANUAL DC2307A Quick Start Procedure Figure 2. High Side Driver Voltage Waveforms. CH 1 Q2 Gate Voltage Relatively to Source (5V/DIV), CH 2 VOUT, CH 3 Sync Signal. Figure 3. Short-Circuit with Automatic Restart Voltage Waveforms. CH 1 Pin 2 (TIMER), CH 2 VOUT, CH 3 Pin 3 (FAULT\). dc2307afa 3 DEMO MANUAL DC2307A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C1 CAP, 22uF 20% 63V SIZE D8 PANASONIC., EEHZA1J220XP 2 1 C2 CAP., X7R, 2.2µF 100V 10% 1210 MURATA, GRM32ER72A225KA35L 3 2 C3, C4 CAP., X7R, 0.1µF 50V 10% 0603 TDK, C1608X7R1H104K 4 1 CD CAP., NPO, 100pF 50V 5% 0603 AVX 06035A101JAT 5 1 D2 DIODE, ZENER, 5.6V, 0.5W SOD-123 FAIRCHILD, MMSZ5232B 6 1 D5 DIODE, ZENER, 15V, 1.0W DIODES INC., DFLZ15-7 7 1 Q1 TRANSISTOR, NPN, SOT-23 FAIRCHILD, MMBTA42 8 1 Q2 MOSFET, 75V, N-CHANNEL INFINEON., BSC036NE7NS3G 9 2 R4 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA 10 1 R6 RES, 1210 0Ω JUMPER VISHAY CRCW12100000Z0EA 11 1 RS1 RES, 0.1Ω 0.5W 1% 1206 TT ELECTRONICS/IRC, LR1206LF-01-R100-F 12 1 RD RES 100Ω 1% 0603 SMD VISHAY, CRCW0603100RFKEA 13 1 RLOAD1 RES 2.43k 1W 1% 2512 SMD PANASONIC, ERJ-1TNF2431U 14 1 R1 RES., 10k 1% 1210 VISHAY, CRCW121010K0FKEA 15 1 R2 RES., 10k 1% 0603 VISHAY, CRCW060310K0FKEA 16 1 R3 RES., 5.1k 1% 0603 VISHAY, CRCW06035K10FKEA 17 1 R5 RES., 10Ω 1% 0603 VISHAY, CRCW060310R0FKEA 18 1 U1 High Side MOSFET Driver LINEAR, LT1910ES8#PBF Additional Demo Board Circuit Components 1 0 C5 CAP., 0805 OPT 2 0 CLOAD CAP., K16 SIZE OPT 3 0 D1, D3 DIODE, SOD-323 OPT 4 0 D4 DIODE, SMC OPT 5 0 R7 1206 OPT 6 0 R8 0603 OPT Hardware: For Demo Board Only 1 7 E1, E2, E3, E4, E5, E6, E7 TESTPOINT, TURRET, .095" MILL-MAX, 2305-2-00-80-00-00-07-0 2 1 JP1 0.079 SINGLE ROW HEADER, 3 PIN SAMTEC,TMM-103-02-L-S 3 1 XJP1 SHUNT SAMTEC, 2SN-BK-G 4 dc2307afa Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. A B C D2 5.6V 1 R1 10K 1210 GND SYNC 1 2 3 2 5 E5 E4 OFF ON C3 0.1uF Q1 MMBTA42 1 3 D RUN JP1 2 R3 5.1K FAULT R8 E3 OPT C4 0.1uF R2 10K 4 4 2 4 3 TIMER IN FAULT LT1910 U1 5 6 7 8 CD 100pF CUSTOMER NOTICE GATE SENSE NC V+ 3 R4 RD 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. R5 OPT 2 10 VICTOR K. APP ENG. SCALE = NONE HZ PCB DES. APPROVALS C5 OPT 0 D3 1 100 D1 OPT 2 1 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. GND 1 2 + 2 DATE: N/A TECHNOLOGY R_LOAD 2.43K R6 0 + 0 GND C_LOAD OPT R7 OPT E2 VIN GND VOUT LT1910ES8 DEMO CIRCUIT 2307A Monday, April 18, 2016 IC NO. 1 SHEET 1 1 OF 1 REV. LTC Confidential-For Customer Use Only Fax: (408)434-0507 E7 E6 www.linear.com 8V - 48V 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 D4 OPT C2 2.2uF 100V E1 DATE VICTOR K. 10-15-2014 APPROVED Protected MOSFET Driver and Load Switch TITLE: SCHEMATIC SIZE C1 22uF 63V DESCRIPTION PRODUCTION 1 1 REVISION HISTORY REV Q2 BSC036NE7NS3G D5 DFLZ15-7 1 4 __ ECO RS1 0.1 1206-2512 2 5 1 2 3 5 A B C D DEMO MANUAL DC2307A Schematic Diagram dc2307afa 5 DEMO MANUAL DC2307A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation 6 dc2307afa Linear Technology Corporation LT 0416 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2014