DC823B-B Analog Devices

DEMO MANUAL DC823B-B LTM4600HV: 28V, 10A Step-Down Power Module Regulator DESCRIPTION Demonstration circuit DC823B-B features the The LTM4600HV data sheet must be read in conjunction LTM 4600HVEV, a 10A high efficiency, high density switch with this demo manual prior to working on or modifying mode step-down power module. The input voltage is from demo circuit DC823B-B. 4.5V to 28V. 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-B QUICK START PROCEDURE Demonstration circuit DC823B-B is easy to set up to 3. Turn on the power at the input. The output voltage evaluate the performance of the LTM4600HVEV. Refer to should be 1.5V 2%. Figure 1 for proper measurement equipment set-up and 4. Once the proper output voltage is established, adjust the follow 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. 2. With power off, connect the input power supply, Pulse amplitude sets the current step. The pulse signal load, optional 5V bias supply and meters as shown in should have very small duty cycle (<15%) to limit the Figure 1. Preset the load to 0A and V supply to be less IN thermal stress of the transient load circuit. The output than 28V. The optional 5V bias supply applied to the transient current can be monitored at BNC connector EXTVCC pin must be off while the main V is turned off. IN J5 (10mV/A). + V + LOAD 0A TO 10A A + V + + + A + dc823ba FO1 Figure 1. Test Set-Up of DC823B-B (EXTVCC V Supply is Optional) BIAS dc823bbf 2