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2023-2026 Microchip Technology Inc. and its subsidiaries

DS20005911B-page 7

HV861

16

VREF

Internal reference voltage to set the regulation voltage. Connect an external

capacitor, CREF, from VREF to ground to slowly brighten the lamp during power-up

and dim down the lamp during power-down. The size of the capacitor determines

the time taken to brighten up or dim down. If fade-in and fade-out are not required,

this pin should be left floating. Fade-in/fade-out time = CREF x 210 x 103 seconds.

TABLE 2-1:

PIN FUNCTION TABLE (CONTINUED)

Pin Number

Pin Name

Description