V

S

SENSEX

VS

OUTX1

OUTX2

R

SENSE

V

S

SENSEX

VS

OUTX1

OUTX2

R

SENSE

V

S

SENSEX

VS

OUTX1

OUTX2

R

SENSE

V

S

SENSEX

VS

OUTX1

OUTX2

R

SENSE

V

S

SENSEX

VS

OUTX1

OUTX2

R

SENSE

I

phase

t

OFF

t

OFF,SLOW

t

DT

t

DT

t

OFF,FAST

V

SENSEX

V

REFX

V

6.3.1

OFF time adjustment

The total OFF time (slow decay + fast decay) is adjusted through an external resistor connected between the

TOFF pin and ground, as shown in Figure 7. PWM current control sequence. A small RC series must be inserted

in parallel with the regulator resistor in order to increase the stability of the regulation circuit according to

Table 12. ON, slow decay and fast decay states indications.

TOFF

R

OFF

C

RCOFF

R

RCOFF

STSPIN220

PWM current control

DS11633 - Rev 4

page 14/27