Datasheet

14
dc1978af
DEMO MANUAL DC1978A
COMMON DEMO BOARD OPERATIONS
PROCEDURE TO DEMONSTRATE CASCADE
SEQUENCING WITH DC1978A
1. Start with the default LTC2974 EEPROM and jumper
settings for DC1978A. Set the DC1809A power good
cascading jumpers JP4, JP5, JP6 and JP7 to SW0,
PG_0, PG_1, PG_2 positions. This connects the power
good and control pins as shown in Figure 9.
2. Enable all output supply preloads on DC1810A by slid-
ing the DC1810A switches SW1, SW2, SW3 and SW4
to ON position.
3. Set the TON_DELAY of all channels to 0ms
4. Set the TOFF_DELAY for the inverse shutdown sequence.