DC823B-A Analog Devices

DEMO MANUAL DC823B-A LTM4600: 20V, 10A Step-Down Power Module Regulator DESCRIPTION Demonstration circuit DC823B-A features the The LTM4600 data sheet must be read in conjunction with LTM 4600EV, a 10A high efficiency, high density switch this demo manual prior to working on or modifying demo mode step-down power module. The input voltage is from circuit DC823B-A. 4.5V to 20V. The output voltage is programmable from Design files for this circuit board are available at 0.6V to 5V. The rated load current is 10A, while derating is DEMO MANUAL DC823B-A QUICK START PROCEDURE Demonstration circuit DC823B-A is an easy way to evalu- 3. Turn on the power at the input. The output voltage ate the performance of the LTM4600EV. Refer to Figure 1 should be 1.5V 2%. for proper measurement equipment set-up and follow the 4. Once the proper output voltage is established, adjust the procedure below: load within the operating range and observe the output 1. Place jumpers in the following positions for a typical voltage regulation, ripple voltage, efficiency and other 1.5V application: parameters. Output voltage ripple should be measured OUT at J6 with a BNC cable. FCB RUN/SS V Select OUT CCM ON 1.5V 5. For optional load transient test, apply an adjustable pulse signal between IOSTEP CLK and GND pins. Pulse amplitude sets the current step. The pulse signal 2. With power off, connect the input power supply, should have very small duty cycle (<15%) to limit the load, optional 5V bias supply and meters as shown in thermal stress of the transient load circuit. The output Figure 1. Preset the load to 0A and V supply to be less IN transient current can be monitored at BNC connector than 20V. The optional 5V bias supply applied to the J5 (10mV/A). EXTVCC pin must be off while the main V is turned off. IN + V + LOAD 0A TO 10A A + V + + + A + dc823ba FO1 Figure 1. Test Set-Up of DC823B-A (EXTVCC V Supply is Optional) BIAS dc823baf 2