R12UZ0080EU0102 Rev.1.02
Page 5
Apr 1, 2022
ISL9122AIIN-EVZ, ISL9122AIRN-EVZ Evaluation Board Manual
setting of
CONV_CFG
register. If the modified output voltage is lower than the initial value, its ramp down rate
depends on the applied load and output capacitance. The
Read REG
button provides the contents of the
register, so adjust the slider accordingly.
14. Register
INTFLG_REG
(Address: 0x03) contains the fault flags. The background color changes from green to
red: when (1) a fault occurs, and (2) this register is read using either the
Check Fault
button or the
READ ALL
button. Each bit is set by a fault event and cleared when read. When the bit is cleared after reading, the
background color changes from red back to green.
15. Register
CONV_CFG
(Address: 0x12) contains crucial converter configuration bits. Selecting the
Write
(or
Read)
button writes (or reads) the entire
CONV_CFG
register in one go.
16. Use
EN_AND
bit to disable the converter through I
2
C by toggling the
Soft Start EN_AND
button from
Soft Start enabled
to
Soft Start inhibit
.
17. Selecting the
Soft DSCHG enabled
button presents a soft discharge resistor on the output pin, when the
converter is disabled through I
2
C using the EN_AND bit and VIN is still HIGH. By default, the
Soft DSCHG
disabled
button is selected.
18. Use the
DVSRATE
drop-down list to modify the dynamic voltage scaling rate for voltage ramp up, when output
voltage is modified using the
VSET
register.
19. Use the
FMODE
drop-down list to select one of the forced operating modes:
Normal
(Auto-PFM, default),
Forced PWM
, and
Forced Bypass
.
20. Use the
CTRL Type
drop-down list to select the control mode between
Type I
and
Type II
error amplifier.
21. Register
INTFLG_MASK
(Address: 0x13) contains additional features influencing the part behavior. Selecting
the
Write
(or
Read
) button writes (or reads) the entire
INTFLG_MASK
register in one go.
22. Use the
OC_FAULT
drop-down to select the over-current handling mechanism for the part. By default, the part
is set to
Hiccup mode
during over-current, but this setting can be changed to
Shutdown mode
or
Current
Limit mode
using this register.
23. Use the
EN_OR
drop-down list to enable a push-button ON functionality for the EN pin. By default, this feature
is disabled.
Figure 4. ISL9122 Evaluation Software Window
