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Part Name
Description
OB3350 View Datasheet(PDF) - On-Bright Electronics
Part Name
Description
Manufacturer
OB3350
OB3350 / Cost Effective LED Controller
On-Bright Electronics
OB3350 Datasheet PDF : 10 Pages
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OB3350
Cost Effective LED Controller
Electrical Characteristics
VDDH=12V,PWM=5V, T
A
=25 , if not otherwise noted.
Parameter
Symbol
Conditions
Min Typ Max Units
Current Consumption
Input voltage range
Operating supply current
Stand by current
I
VDD
I
VDD
_
STB
8
Vin=12V,PWM=5V
load
no
-
PWM low >50ms sleep
mode
-
-
35
V
2.5 3
mA
310 400 uA
VDD UVLO
UVLO
UVLO Hysteresis
UVLO(ON)
UVLO(Hys)
6
78
V
500
mV
Soft start
Soft start slope
I
sst
_
slop
400
mV/mS
PWM Control
Operating frequency
Max duty cycle
PWM Input Threshold
F
OSC
D
max
PWM(high)
PWM(low)
High Level
Low Level
175 200 225 KHz
93 95 97 %
2.5 V
1.3
V
Error Amplifier
Reference voltage
Open loop voltage gain
Transconductance of EA
V
ref
_
ea
A
m
Gm
Reference voltage at
non-inverting input
0.289
0.3
0.311 V
70
dB
80
100 120 uA/V
Output source current
I
source
24
30 36
uA
Output sink current
I
sin
k
48
60 72
uA
Protection Threshold
OVP
OCP
V
OVP OV
V
th_OCP
Threshold of
over voltage
output
1.8
2.0 2.2
V
Threshold of over
current
protection
330
mV
(duty=90%)
OTP ON
T
OTP
_
ON
140 160 180
OTP OFF
T
OTP
_
OFF
120 140 160
Connect detect time
OVP UVLO threshold
T
dio
V
OVP UV
Normal operation
System startup
1
mS
200
mV
100
mV
Gate Driver Output
Gate rise time
T
rise
500pF load
-
40 80
ns
Gate fall time
T
fall
500pF load
20 40
ns
©
On-Bright Electronics
Confidential
-5-
Preliminary datasheet
OB_DOC_DS_335000
Free Datasheet http://www.datasheetlist.com/
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