JAJSL65 February 2023 LM5148-Q1
PRODUCTION DATA
The LM5148-Q1 can be configured as a primary controller (interleaved mode) or as a secondary controller for paralleling the outputs for high-current applications with a resistor RCNFG. This resistor also configures if spread spectrum is enabled or disabled. See Table 8-2. After the VCC voltage is above 3.3 V (typical), the CNFG pin voltage is monitored and latched. To change the configuration mode, the LM5148-Q1 must be powered down, and VCC must drop below 3.3 V. Figure 8-6 shows the configuration timing diagram.
When the LM5148-Q1 is configured as a primary controller with spread spectrum enabled (RCNFG of 41.2 kΩ or 71.5 kΩ), the LM5148-Q1 cannot be synchronized to an external clock.
RCNFG | PRIMARY/SECONDARY | SPREAD SPECTRUM | DUAL PHASE |
---|---|---|---|
29.9 kΩ | Primary | OFF | Disabled |
41.2 kΩ | Primary | ON | Disabled |
54.9 kΩ | Primary | OFF | Enabled |
71.5 kΩ | Primary | ON | Enabled |
90.9 kΩ | Secondary | N/A | Enabled |