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SC5014AEVB 数据表(PDF) 15 Page - Semtech Corporation

部件名 SC5014AEVB
功能描述  High Efficiency 2-Channel HB LED Driver with I2C Interface and Direct PWM Dimming
PDF  27 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC5014AEVB 数据表(HTML) 15 Page - Semtech Corporation

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SC5014A
5
Table 1 — 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 < ( + R2/R)
x .23 (rising)
No Startup
Not Active
V
UVLO > .23V
(rising)
High
No
V
IN < ( + R2/R) × .23V - IUVLO
× R
 (falling)
Shutdown
Not Active
V
UVLO > .23V
(rising)
High
Input
Under-volt-
age 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 > .23V
(rising)
Regulate to OVP
threshold:
I
O(n) = “on”
Low
(non-latching)
V
OVP < .22V
(falling)
High on re-
moval of fault
condition
Over-current
Protection
(OCP)
No
V
CS > 0.4V
Limit Q FET drain
current < 0.4V/R9
(typ) ()
High
V
CS > 0.4V
High
Shorted
LED(s)
Yes, tie
SCP to
VCC
V
IO(n) > 20 x VSCP
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 VSCP
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.V
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.V
and OVP event
Device latch-off;
I
O(All) = “off”
Low
(latching)
Replace Open
LED(s) and Toggle
EN, VCC or UVLO
High
Unused Strings
No
V
IO(All) < 0.V
(start up)
Device on:
I
O(n) = “off”
Other I
O(All) = “on”
High
Over-Tempera-
ture Protection
(OTP)
No
T
J > 50ºC (typ)
Device off;
I
O(All) = “off”
Low
(latching)
Satisfy T
HYS > 0ºC;
Device On;
I
O(All) = “on”;
Toggle EN, VCC or
UVLO
High
Note: Refer to the application circuit example for R
 and R2 on page 20, Figure 2.



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