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CSD17303Q5 Datasheet(PDF) 6 Page - Texas Instruments |
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CSD17303Q5 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 23 page TP14 TP11 Metal Ground Barrel Probe Tip Test Setup www.ti.com 4 Test Setup 4.1 Test Equipment Voltage Source V5IN: The input voltage source V5IN must be a 0-V to 5-V variable dc source capable of supplying 1 Adc. Connect V5IN to J1 as shown in Figure 3. Voltage Source VIN: The input voltage source VIN must be a 0-V to 20-V variable dc source capable of supplying 10 Adc. Connect VIN to J2 as shown in Figure 3. Multimeters: V1: V5IN at TP2 (V5IN) and TP3 (GND). V2: VIN at TP5 (VIN) and TP8 (GND). V3: VDDQ at TP11 (VDDQ) and TP14 (GND). V4: VTT at TP12 (VTT) and TP13 (GND). V5: VTTREF at TP17 (VTTREF) and TP18 (GND). A1: VIN input current A2: V5IN input current Output Load: The output load must be an electronic constant-resistance mode load capable of 0-Adc to 20 Adc at 1.5 V. Oscilloscope: A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope must be set for 1-M Ω impedance, 20-MHz bandwidth, ac coupling, 2-µs/division horizontal resolution, 20-mV/division vertical resolution. Test points TP11 and TP14 can be used to measure the output ripple voltage by placing the oscilloscope probe tip through TP11 and holding the ground barrel on TP14 as shown in Figure 2. Using a leaded ground connection may induce additional noise due to the large ground loop. Figure 2. Tip and Barrel Measurement for VDDQ Output Ripple Fan: Some of the components in this EVM may approach temperatures of 60 ºC during operation. A small fan capable of 200-400 LFM is recommended to reduce component temperatures while the EVM is operating. The EVM must not be probed if the fan is not running. Recommended Wire Gauge: 1. V5IN to J1(5-V input): The recommended wire size is 1x AWG 18 per input connection, with the total length of wire less than 4 feet (2-foot input, 2-foot return). 2. VIN to J2(12-V input): The recommended wire size is 1x AWG 16 per input connection, with the total length of wire less than 4 feet (2-foot input, 2-foot return). 3. J5 to LOAD: The minimum recommended wire size is 2x AWG 16, with the total length of wire less than 4 feet (2-foot input, 2-foot return) 6 Using the TPS51916EVM-746 Complete DDR2, DDR3, DDR3L, and DDR4 SLUU526 – August 2011 Memory Power Solution Synchronous Buck Controller, 2-A LDO, Buffered Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Reference |
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