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Part Name
Description
SC5014 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
SC5014
High Efficiency 4-Channel HB LED Driver with I2C Interface and Phase-Shifted PWM Dimming
Semtech Corporation
'SC5014' PDF : 34 Pages
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SC5014
Table 3 — 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
V
IN
< (1 + R
2
/R
1
)
x 1.23 (rising)
at VIN
(UVLO)
No
V
IN
< (1 + R
2
/R
1
) × 1.23V - I
UVLO
× R
1
(falling)
Input
No
Under-volt-
age 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
V
UVLO
> 1.23V
(rising)
V
UVLO
> 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)
Shorted
LED(s)
Yes, tie
SCP to
VCC
Open
LED(s)
No
Unused Strings No
V
OVP
> 1.23V
(rising)
V
CS
> 0.4V
V
IO(n)
> 20 x V
SCP
V
IO(All)
> 20 x V
SCP
V
IO(n)
< 0.1V
and OVP event
V
IO(All)
< 0.1V
and OVP event
V
IO(All)
< 0.1V
(start up)
Regulate to OVP
threshold:
I
O(n)
= “on”
Limit Q1 FET drain
current < 0.4V/R9
(typ)
(1)
Device on:
I
O(n)
= “off ”
Other I
O(All)
= “on”
Device latch-off;
I
O(All)
= “off ”
Device on:
I
O(n)
= “off ”
Other I
O(All)
= “on”
Device latch-off;
I
O(All)
= “off ”
Device on:
I
O(n)
= “off ”
Other I
O(All)
= “on”
Low
(non-latching)
V
OVP
< 1.22V
(falling)
High on re-
moval of fault
condition
High
Low
(latching)
Low
(latching)
Low
(latching)
Low
(latching)
V
CS
> 0.4V
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
High
High
High
High
High
High
Over-Tempera-
ture Protection No
(OTP)
T
J
> 150ºC (typ)
Device off;
I
O(All)
= “off ”
Low
(latching)
Satisfy T
HYS
> 10ºC;
Device On;
I
O(All)
= “on”;
Toggle EN, VCC or
High
Note: Refer to the application circuit example for R
1
and R
2
on page 23, Figure 2.
18
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