BP5226-18_10 Datasheet, PDF (1/1 Pages) Rohm – Step-down DC/DC Converter(Non-isolated)

Data Sheet
18V/500mA Output
Step-down DC/DC Converter(Non-isolated)
BP5226-18
Absolute Maximum Ratings
Parameter
Input voltage
Operating temperature range
Storage temperature range
Symbol
Vi
Topr
Tstg
Maximum surface temperature Tcmax
Maximum output current
Iomax
Limits
Unit
Conditions
V DC
°C Refer to derating curve
°C
°C ^{(Ambient temperature +}
the module self-heating) Tcmax
mApk
Dimensions (Unit :mm)
Electrical Characteristics
Parameter
Symbol Min.
Input voltage range
Output voltage
Output current
Line regulation
Load regulation
Output ripple voltage
CTL pin OFF voltage
CTL pin ON voltage
CTL terminal pull-up resistance
Power conversion efficiency
Typ. Max.
Unit
Conditions
DC
Vi=34V, Io=500mA
Vi=34V
Vi=20 to 46V, Io=500mA
Vi=34V, Io=0 to 500mA
Vi=34V, Io=500mA
SW1 OFF (VoOFF)
SW1 ON (VoON)
Vi=34V, Io=500mA
Application Circuit
BP5226-18
AC24V
D1
121110 7 5 3 2 1
FUSE
C1
L1
Ctl
Io
C2 Vo
Pin No.
Function
1 Output terminal:Vo(18V)
2 CTL terminal
3 Power inductor terminal
4 Skip
5 Power inductor terminal
6 Skip
7 COMMON
8 Skip
9 Skip
10 Input terminal
11 N.C.
12 Input terminal
Be sure to use fuse for safety.
Please verify operation and characteristics in the customer's circuit before actual usage.
Ensure that the load current does not exceed the maximum rating.
Input terminal is 10 and 12.
External Component Specifications
FUSE: fuse
Use a quick-acting fuse (1.8A)
C1: Input capacitor
C2: Output capacitor
L1: Power inductor
D1: Diode
Above 60V, current:above 1.0A
Derating Curve
Derating Curve
600
500
400
300
Operation Range
200
100
0
-30 -20 -10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta(°C)
Conversion Efficiency
Conversion Efficiency
(Ta=25°C, Vi=34V)
100
80
60
40
20
0
0
100 200 300 400 500
Output Current Io(mA)
Load Regulation
Load Regulation
(Ta=25°C, Vi=12V)
20.0
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0
0 100 200 300 400 500 600 700 800
Output Current Io(mA)
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2010.03 - Rev. B