Rohm BP5843A Isolated high-power led driver for illumination Datasheet

Data Sheet
100VAC Input/Constant Current
Isolated High-power LED Driver for Illumination
BP5843A
Absolute Maximum Ratings
Dimensions (Unit : mm)
V
Vpk
kV
Maximum surface temperature
Tcmax
105
°C
Operating temperature range
Storage temperature range
Topr
Tstg
−20 to +80
−25 to +85
°C
°C
Conditions
1s (between primary and secondary)
Ambient temperature + module
self-heating Tcmax
Refer to derating curve
Typ.
141
350
−
−
85
Max.
170
369
12
0.5
−
Unit
V
mA
V
Vp-p
%
Conditions
3 4 5
9 10 11
0.75±0.1
1.3±0.2
0.5±0.05
P=2.54±0.2
11.05MAX.
4.75MAX.
Derating Curve
Derating Curve
5
Vi=141V, R1=0.82Ω (1%) ∗1
Vi=141V, lo=350mA
∗2
Vi=141V, lo=350mA
Vi=141V, Vo=12V, lo=350mA
Application Circuit
4
3
Operation Range
2
1
0
-30 -20 -10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta(°C)
Be sure to use fuse for safety
1
3
9
10 11
F1
R1
D1
LF1
C2
+
C1
C4
Function
Input terminal (+)
Skip
Input terminal (−)
NC
NC
Skip
Skip
Skip
Output capacitor connection terminal
LED connection terminal (cathode)
LED connection terminal (anode)
Output Current (A)
Output Characteristics
Pin No.
1
2
3
4
5
6
7
8
9
10
11
BP5843A
C3
1
2.54x10=25.4 TYP.
∗1 Maximum output current varies depending on ambient temperature ; please refer to derating curve.
∗2 Spike noise is not included in output ripple voltage.
ZNR1
15.8MAX.
MARKING SIDE
3.55MAX
Electrical Characteristics
Symbol Min.
Parameter
Input voltage range
113
Vi
Output current
332
Io
Output voltage range Vo
2.5
Output ripple voltage
−
Vp
Power conversion efficiency
80
η
32.6MAX.
DC
Marking Side
Unit
170
12
1.8
24.0MAX.
Limits
Vi
Vo
BV
4.0±1.0
Symbol
Output Power (W)
Parameter
Input voltage
Output voltage
Withstand voltage
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
Output characteristics
R1=0.91Ω
Operation Range
R1=
0
2
4
6
8 10 12
Output Voltage(V)
14
16
C5
Current Setting
Setting resistor : R1(Ω)
External Component Specifications
C1 : Input Capacitor
10µF/250V
C2 : Output Capacitor
40µF/25V ceramic capacitor
R1 : Output current setting
resistor
0.82Ω ±1% 1/4W (lo=350mA)
C3, C4: Noise Removal
Capacitor
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.
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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
1/1
2010.01 - Rev.A
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R1010A
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