BP5811 Datasheet, PDF (1/3 Pages) Rohm – Variable output DC/DC converter

Variable output DC/DC converter
0 to 19V/300mA output type
Absolute Maximum Ratings
Parameter
Motor driving supply voltage
CTL input voltage
Maximum output current
Operating temperature range
Storage temperature range
Maximum surface temperature
Symbol
VMIN
VCTL
Iopeak
Topr
Tstg
Tcmax
Limits
25
0.3 to 5.5
300
−20 to +80
−30 to +85
100
Recommended Action Conditions
Parameter
Symbol Min. Typ. Max. Unit
Motor driving supply voltage VMIN 19.0 20.0 21.0
V
CTL input voltage
Vctl
0
-
5.0
V
CTL input frequency
fctl
1
50 100
kHz
Electrical Characteristics
Unless otherwise specified,VMIN=20V, IO=300mA. VCTL=5.0V, Ta=25°C
Parameter
Symbol Min. Typ. Max. Unit
18.0 19.0 20.0 V
Output voltage
Vo 14.3 15.1 15.9 V
6.76 7.35 7.94 V
Output current
Io
-
-
300 mA
Output ripple
VP
- 0.05 0.15 Vp-p
Power conversion e fficiency η
88 93
-
%
Unit
V
V
mA
°C
°C
°C
Conditions
IO=300mA
Conditions
Application circuit
BP5811
BP5811
123
6789
WMin
C1
L1
Vo
C2
CTL
Be sure to use fuse for safety.
External components setting
FUSE: Fuse
C1: Capacitor for input
voltage smoothing
C2: Capacitor for Output
voltage smoothing
L1: Power inductor
Please make sure to use quick acting (2.3A)
470µF/50V Low impedance
Recommended part : PM series (Nichicon)
470µF/50V Low impedance
Recommended part : PM series (Nichicon)
47µH, Rated current 1.2A or higher
Recommended part : TSL0808-470K1R2 (TDK)
Description terminal
Pin No.
1
2
3
4
5
6
7
8
9
Function
Input terminal
N.C.
GND
Skip
Skip
Coil connection terminal
Coil connection terminal
Control terminal
Output voltage
BP5811
Dimensions (Unit : mm)
Derating Curve
350
300
Vctl=5V
250
Vctl=4V
Derating Curve
200
Vctl=3V
150
Vctl=2V
100
Vctl=1V
50
0
-30 -20 -10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta(°C)
Output voltage
control characteristic (Ta=25°C)
VO-VCTL Characteristics (VMin=20V)
20
15
10
5
0
0
1
2
3
4
5
Control Voltage (DC) VCTL(V)
VO-Duty Characteristics (VMin=20V)
20
15
10
5
0
0
20 40 60 80 100
Control Duty fCTL=50kHz Duty(%)
Conversion efficiency
(VMin=20V, VCTL=5V)
100
90
80
70
60
50
40
30
20
10
0
0
50
100 150 200 250 300
Output Current IO (mA)