DC1988A

製品概要

Demonstration circuit 1988A is a 2kV AC (3kVDC) isolated flyback μModule^® DC/DC converter with LDO post regulator featuring the LTM8058. The demo circuit is designed for a 6V flyback output and a 5V post regulator output from a 4.5V to 30V input. The current capability of the 6V flyback output varies with input voltage from about 100mA at 4.5V_IN to about 320mA at 30V_IN. Figure 1 shows the typical maximum output current on V_OUT1 when V_OUT2 is not loaded. V_OUT2 is the LDO post regulator from V_OUT1. The current capability of V_OUT2 is limited by either the current capability of V_OUT1 minus V_OUT1 loading or the 300mA current limit on the LDO post regulator itself. R1 provides the necessary minimum load current to keep the V_OUT1 in regulation throughout the entire input voltage range. Please see the typical performance characteristic curves in the LTM8058 data sheet to determine the minimum load current for other input/output configurations.