BD93941EFV Datasheet, PDF (21/30 Pages) Rohm – LED pin rating 60V

BD93941EFV BD93941FP
List of Protect Function (typ condition)
Protection
Name
Detection
Pin
Detection Conditions
Detection pin PWM SS
Cancellation
Conditions
LED OPEN
LEDｘ
LEDx < 0.2V
H SS>3.7V
LEDx > 0.2V
LEDSHORT
LEDｘ
ISET GND
SHORT
REG58 UVLO
VCC UVLO
OVP
ISET
REG58
VCC
OVP
SCP
OVP
LEDx > 5V
Under
ISET×90%
REG58<2.4V
VCC<7.3V
OVP>3.0V
OVP<0.1V
H SS>3.7V
LEDx < 5V
-
-
-
-
-
-
-
-
Above
ISET×90%
REG58>2.6V
VCC>7.5V
OVP<2.9V
-
-
OVP>0.1V
FB OVER
SHOOT
FB
FB>4V
-
-
OCP
CS
OCP>0.45V
-
-
To clear the latch type, STB should be set to “L” once, and then to “H”.
FB<3.6V
-
Datasheet
Protection Type
Immediately Auto-Restart
after detection
(Judge periodically
whether normal or not)
Immediately Auto-Restart
after detection
(Judge periodically
whether normal or not)
Auto-Restart
Auto-Restart
Auto-Restart
Auto-Restart
Immediately Auto-Restart
after detection
(Judge periodically
whether normal or not)
Immediately Auto-Restart
after detection
(Judge periodically
whether normal or not)
Pulse-by-Pulse
Protection Function
LED OPEN
LEDSHORT
ISET GND SHORT
STB
REG58 UVLO
VCC UVLO
OVP
SCP
FB OVER SHOOT
OCP
Operation after the protection function detected
DC/DC
Continue to operate
Continue to operate
Stop immediately
Stop immediately
Stop immediately
LED Driver
Only detects LED,
stops after CP1 count
Only detects LED,
stops after CP1 count
Stop immediately
Stop
(and when REG58<2.4V)
Stop immediately
Soft-start
Continue to operate
Continue to operate
Continue to operate
Discharge immediately
Discharge immediately
Stop immediately
Stop immediately
(N pin only)
Stop immediately
(N pin only)
Stop after CP2 count
Stop immediately
Continue to operate
Stop after CP1 count
Stop after CP2 count
Discharge immediately
Continue to operate
Discharge after CP1 count
Continue to operate
N pin limits DUTY
Continue to operate
Continue to operate
* CP1 = 20ms (RT=75KΩ) , CP2=1.31s (RT=75KΩ)
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TSZ22111・15・001
21/27
TSZ02201-0F1F0C100270-1-2
10.Oct.2013 Rev.001