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BD8112EFV-M
Technical Note
Parameter
Symbol
Min
Limits
Typ
Max.
Unit
Conditions
[OVP Block]
Over-voltage detection
reference voltage
OVP hysteresis width
SCP Latch OFF Delay Time
V OVP
V OHYS
T SCP
1.9
0.45
70
2.0
0.55
100
2.1
0.65
130
V
V
ms
V OVP =Sweep up
V OVP =Sweep down
R T =100k Ω
[UVLO Block ]
UVLO voltage
UVLO hysteresis width
V UVLO
V UHYS
4.0
50
4.3
150
4.6
250
V
mV
V CC : Sweep down
V CC : Sweep up
[LED Output Block]
LED current
relative dispersion width
LED current
absolute dispersion width
ISET voltage
PWM minimum pulse width
PWM maximum duty
PWM frequency
VDAC gain
Open detection voltage
LED Short detection Voltage
LED Short Latch OFF Delay Time
PWM Latch OFF Delay Time
I LED1
I LED2
V ISET
Tmin
Dmax
F PWM
G VDAC
V OPEN
V SHORT
T SHORT
T PWM
-3
-5
1.96
25
-
-
-
0.2
4.2
70
70
-
-
2.0
-
-
-
25
0.3
4.5
100
100
+3
+5
2.04
-
100
20
-
0.4
4.8
130
130
%
%
V
μs
%
KHz
mA/V
V
V
ms
ms
I LED =50mA,
Δ I LED1 =(I LED /I LED_AVG -1) × 100
I LED =50mA,
Δ I LED2 =(I LED /50mA-1) × 100
R ISET =120k Ω
F PWM =150Hz, I LED =50mA
F PWM =150Hz, I LED =50mA
Duty=50%, I LED =50mA
V DAC =0 ～ 2V, R ISET =120k Ω
I LED =VDAC ÷ R ISET × Gain
V LED = Sweep down
V OVP = Sweep up
RT=100k Ω
RT=100k Ω
[Logic Inputs (EN, SYNC, PWM, LEDEN)]
Input HIGH voltage
Input LOW voltage
V INH
V INL
2.1
GND
-
-
5.5
0.8
V
V
Input current 1
Input current 2
I IN
I EN
20
15
35
25
50
35
μA
μA
V IN =5V
(SYNC, PWM, LEDEN)
V EN =5V (EN)
[FAIL Output (open drain) ]
FAIL LOW voltage
V OL
-
0.1
0.2
V
I OL =0.1mA
◎ This product is not designed for use in radioactive environments.
www.rohm.com
? 2010 ROHM Co., Ltd. All rights reserved.
3/22
2011.08 - Rev.C
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