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SC5010 Datasheet(PDF) 20 Page - Semtech Corporation

Part # SC5010
Description  High Effi ciency 8-Channel LED Driver with I2C Interface and Phase-Shifted PWM Dimming
PDF  36 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC5010 Datasheet(HTML) 20 Page - Semtech Corporation

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SC5010
20
lator to the SYNC input. Figures on page 11 show
synchronization of SC5010 to a 48kHz HSYNC signal
applied on SYNC pin. The turn-on of the LED string IO1
(falling edge of V
IO1
) is synchronized to the rising edge of
the HSYNC input. The turn-on of rest of the strings will be
delayed based on the phase shifting algorithm. Another
figure shows the delay (~500ns) between HSYNC rising
edge and turn-on of the LED string 1 (IO1).
Input Disconnect
The SC5010 incorporates a high voltage (up to 27V) p-
MOSFET gate driver which can be used for controlling an
Table 2 — Fault Protection Descriptions
Type of
Fault
User
Disable?
Fault Criteria
Action on Fault
Recovery
Device
FLT pin (latching
/ non-latching
Condition(s)
FLT pin
Input
Under-voltage
at VIN
(UVLO)
No
V
IN
< 1 + R
2
/R
1
)
x 1.23 (rising)
No Startup
Not Active
V
UVLO
> 1.23V
(rising)
High
No
V
IN
< (1 + R
2
/R
1
) × 1.23V - I
UVLO
× R
1
(falling)
Shutdown
Not active
V
UVLO
> 1.23V
(rising)
High
Input
Under-volage
at VCC
(UVLO)
No
VCC < 4.2V
(rising)
No Startup
Not active
VCC > 4.2V
(rising)
High
No
VCC < 4.0V
(falling)
Shutdown
Not active
VCC > 4.2V
(rising)
High
Over-voltage
Protection
(OVP)
No
V
OVP
> 1.2V
(rising)
Regulate to OVP
threshold:
I
O(n)
= “on”
Low
(non-latching)
V
OVP
> 1.2V
(falling)
High on re-
moval of fault
condition
Over-current
Protection
(OCP)
No
V
CS
> 0.4V
Limit Q1 FET drain
current < 0.4V/R3
(typ)
High
V
CS
> 0.4V
High
Shorted
LED(s)
Yes, tie
SCP to
VCC
V
IO(n)
> 20 x V
SCP
Device on:
I
O(n)
= “off”
Other I
O(All)
= “on”
Low
(latching)
Replace shorted
LED(s) and Toggle
EN, VCC or UVLO
High
V
IO(All)
> 20 x V
SCP
Device latch-off;
I
O(All)
= “off”
Low
(latching)
Replace shorted
LED(s) and Toggle
EN, VCC or UVLO
High
Open
LED(s)
No
V
IO(n)
< 0.1V
and OVP event
Device on:
I
O(n)
= “off”
Other I
O(All)
= “on”
Low
(latching)
Replace open
LED(s) and Toggle
EN, VCC or UVLO
High
V
IO(All)
< 0.1V
and OVP event
Device latch-off;
I
O(All)
= “off”
Low
(latching)
Replace open
LED(s) and Toggle
EN, VCC or UVLO
High
Over-Tempera-
ture Protection
(OTP)
No
TJ > 150ºC (typ)
Device off;
I
O(All)
= “off”
Low
(latching)
Satisfy T
HYS
> 10ºC;
Device on;
I
O(All)
= “on”;
Toggle EN, VCC or
UVLO
High
Note: Refer to the application circuit example on page 21.
Applications Information (continued)



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