BP5843A_10 Datasheet, PDF (1/4 Pages) Rohm – Isolated High-power LED Driver for Illumination

Data Sheet
100VAC Input/Constant Current
Isolated High-power LED Driver for Illumination
BP5843A
Absolute Maximum Ratings
Parameter
Input voltage
Output voltage
Withstand voltage
Symbol
Vi
Vo
BV
Limits
170
12
1.8
Maximum surface temperature Tcmax
105
Operating temperature range Topr
Storage temperature range Tstg
−20 to +80
−25 to +85
Unit
Conditions
V DC
Vpk
kV 1s (between primary and secondary)
°C ^{Ambient temperature + module}
self-heating Tcmax
°C ^{Refer to derating curve}
°C
Electrical Characteristics
Parameter Symbol Min. Typ. Max. Unit
Conditions
Input voltage range Vi
Output current
Io
Output voltage range Vo
Output ripple voltage Vp
Power conversion efficiency η
113 141 170 V
332 350 369 mA Vi=141V, R1=0.82Ω (1%) ∗1
2.5
−
12
V Vi=141V, lo=350mA
−
−
0.5 Vp-p Vi=141V, lo=350mA
∗2
80 85
−
% Vi=141V, Vo=12V, lo=350mA
∗1 Maximum output current varies depending on ambient temperature ; please refer to derating curve.
∗2 Spike noise is not included in output ripple voltage.
Dimensions (Unit : mm)
32.6MAX.
15.8MAX.
MARKING SIDE
3.55MAX
1 34 5
9 10 11
0.75±0.1
1.3±0.2
P=2.54±0.2
2.54x10=25.4 TYP.
4.75MAX.
0.5±0.05
11.05MAX.
Derating Curve
Derating Curve
5
4
3
2
Operation Range
1
0
-30 -20 -10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta(°C)
Application Circuit
BP5843A
Be sure to use fuse for safety
ZNR1 C3
D1
LF1
C4
1 3 9 10 11
F1
R1
+
C2
C1
C5
Pin No.
Function
1 Input terminal (+)
2 Skip
3 Input terminal (−)
4 NC
5 NC
6 Skip
7 Skip
8 Skip
9 Output capacitor connection terminal
10 LED connection terminal (cathode)
11 LED connection terminal (anode)
External Component Specifications
C1 : Input Capacitor
10µF/250V
C2 : Output Capacitor
40µF/25V ceramic capacitor
R1 : Output current setting
resistor
C3, C4: Noise Removal
Capacitor
0.82Ω ±1% 1/4W (lo=350mA)
Use if necessary
Capacitance : 0.1 to 0.22µF
Rated voltage : 250V or higher
C5 : Noise Removal Capacitor 2200pF (Basic insulation)
D1: Diode bridge
800V/1A
F1: Fuse
A fuse must be used for safety
LF1: Line Filter
10mH
ZNR1: Varistor
A varistor is required to protect against lightning surges
and static electricity.
Output Characteristics
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
Output characteristics
R1=0.91Ω
Operation Range
R1=
2 4 6 8 10 12 14 16
Output Voltage(V)
Current Setting
Output current-Setting resistor
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.24 0.26
0.28
0.30
0.32 0.34 0.36
Output current : (A)
How to calculate R1
R1=0.13741/(0.91 x lo-0.151)
lo : Output current
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2010.01 - Rev.A