SC5010H View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
SC5010H
Semtech Corporation
'SC5010H' PDF : 36 Pages View PDF
SC5010H
Applications Information (continued)
enable options, fade time, fade type.
2. Fade Rate (register address 0x0A) — sets fade step
size option.
Fade option register allows user to select fading, choose
between linear or logarithmic fading, and to set up the
fading time. The default setting is fading enabled with
logarithmic mode. The fading time is determined by the
LED PWM dimming frequency. Fade setting is shown in
the table on page 21.
Table 2 — Fault Protection Descriptions
Type of
Fault
User
Disable?
Fault Criteria
Action on Fault
Device
FLT pin (latching
/ non-latching
Recovery
Condition(s)
FLT pin
Input
No
Under-voltage
VIN < 1 + R2/R1)
x 1.23 (rising)
at VIN
(UVLO)
No
VIN < (1 + R2/R1) × 1.23V - IUVLO
× R1 (falling)
Input
No
Under-volage
at VCC
(UVLO)
No
VCC < 4.2V
(rising)
VCC < 4.0V
(falling)
No Startup
Shutdown
No Startup
Shutdown
Not Active
Not active
Not active
Not active
VUVLO > 1.23V
(rising)
VUVLO > 1.23V
(rising)
VCC > 4.2V
(rising)
VCC > 4.2V
(rising)
High
High
High
High
Over-voltage
Protection
No
(OVP)
Over-current
Protection
No
(OCP)
VOVP > 1.23V
(rising)
VCS > 0.4V
Regulate to OVP
threshold:
IO(n) = “on”
Limit Q1 FET drain
current < 0.4V/R3
(typ)
Low
(non-latching)
High
VOVP < 1.22V
(falling)
High on re-
moval of fault
condition
VCS > 0.4V
High
Shorted
LED(s)
Yes, tie
SCP to
VCC
Open
LED(s)
No
Over-Tempera-
ture Protection No
(OTP)
VIO(n) > 20 x VSCP
VIO(All) > 20 x VSCP
VIO(n) < 0.1V
and OVP event
VIO(All) < 0.1V
and OVP event
TJ > 150ºC (typ)
Device on:
IO(n) = “off ”
Other IO(All) = “on”
Device latch-off;
IO(All) = “off ”
Device on:
IO(n) = “off ”
Other IO(All) = “on”
Device latch-off;
IO(All) = “off ”
Device off;
IO(All) = “off ”
Low
(latching)
Low
(latching)
Low
(latching)
Low
(latching)
Low
(latching)
Replace shorted
LED(s) and Toggle
EN, VCC or UVLO
Replace shorted
LED(s) and Toggle
EN, VCC or UVLO
Replace open
LED(s) and Toggle
EN, VCC or UVLO
Replace open
LED(s) and Toggle
EN, VCC or UVLO
Satisfy THYS > 10ºC;
Device on;
IO(All) = “on”;
Toggle EN, VCC or
UVLO
High
High
High
High
High
Note: Refer to the application circuit example on page 21.
20
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