DC1198B-B Analog Devices

DEMO MANUAL DC1198B-B LTM4607EV: High Density Buck-Boost Power Module DESCRIPTION Demonstration circuit DC1198B-B features the 400kHz. This clock input can be used to reduce undesir- LTM 4607EV, a high ef ciency, high density switch mode able frequency harmonics and reduce input and output buck-boost power module. The LTM4607EV can regulate ripple when paralleling LTM4607 modules for even higher its output voltage from input voltage both above and below output current. The LTM4607 data sheet must be read the output. The board accepts an input voltage from 6V in conjunction with this demo manual for working on or to 36V and is set for an output voltage of 12V. The rated modifying the demo circuit DC1198B-B. load current is 5A in boost mode and 12A in step-down Design les for this circuit board are available at operation. Derating is necessary for certain V , V IN OUT DEMO MANUAL DC1198B-B QUICK START PROCEDURE Demonstration circuit DC1198B-B provides a simple way 4. Once the proper output voltage is established, adjust to evaluate the performance of the LTM4607EV. Please the load within the operating range and observe the refer to Figure 1 for the proper measurement equipment output voltage regulation, ripple voltage, ef ciency set-up, and follow the procedure below: and other parameters. The cooling fan and lower cur- rent sensing resistor are necessary for V < 6V and IN 1. Place jumpers in the following positions for a typical I = 5A. OUT 12V application: OUT 5. To measure the input and output ripple, please refer RUN CLOCK MODE START to Figure 2 for the proper set-up. On Prog CCM SSO 6. The voltage at PLLFLTR determines the switching 2. With the power off, preset the load to 0A and the V IN frequency. Modify R6 and R7 to adjust the switching supply to less than 36V. Next, connect the input power frequency. Do not allow the voltage at pin PLLFLTR supply, load and meters, as shown in Figure 1. to exceed 2.4V. 3. Turn on the power at the input. The output voltage 7. Inductor and R should be modi ed to accom- SENSE should be 12V, 2%. modate certain input and output conditions. Please refer to Table 1 for recommended inductors. + LOAD 0A TO 5A + + INPUT OR OUTPUT CAPACITOR Figure 2. Proper Scope Probe Placement for Measuring Input or Output Ripple DC1198BB F01 V IN + + + Figure 1. Test Set-Up of the DC1198B-B dc1198bbfa 2