Application information

STLC3075

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1.

2.

For low ripple application use 2x47m F in parallel.

3.

Can be saved if proper PCB layout avoid noise coupling on RD pin (high impedance input).

4.

RF1 sets the self generated battery voltage in RING and ACTIVE(Il=0) mode as shown in Table 11.

VBATR should be defined considering the ring peak level required (Vringpeak=VBATR - 6 V typ.). This relation is valid

requested by the particular ringer load configuration

5.

For high efficiency in HI-Z mode coil resistance @125kHz must be < 3

Ω.

Table 11.

VBAT values in RING and ACTIVE modes

267k

Ω

280k

Ω

294k

Ω

300k

Ω

VBAT (ACTIVE)

-46V

-48V

-49V

-50V

VBATR (RING)

-62V

-65V

-68V

-70V