Variable output DC/DC converter
0 to 19V/300mA output type
BP5811
Absolute Maximum Ratings
Parameter
Motor driving supply voltage
CTL input voltage
Maximum output current
Operating temperature range
Storage temperature range
Maximum surface temperature
Symbol
VM
IN
V
CTL
Iopeak
Topr
Tstg
Tcmax
Dimensions
(Unit : mm)
Limits
25
0.3 to
5.5
300
鈭?0
to +80
鈭?0
to +85
100
Unit
V
V
mA
擄C
擄C
擄C
Recommended Action Conditions
Parameter
Symbol
Motor driving supply voltage
VM
IN
CTL input voltage
V
ctl
CTL input frequency
f
ctl
Min.
19.0
0
1
Typ.
20.0
-
50
Max.
21.0
5.0
100
Unit
V
V
kHz
Conditions
I
O
=300mA
Derating Curve
Output Current Io(mA)
350
300
250
200
150
100
50
0
Derating Curve
Vctl=5V
Vctl=4V
Vctl=3V
Vctl=2V
Vctl=1V
Electrical Characteristics
Unless otherwise specified,VM
IN
=20V, I
O
=300mA. V
CTL
=5.0V, Ta=25
擄C
Symbol Min.
Parameter
Typ.
Max.
Unit
V
18.0
20.0
19.0
V
Output voltage
14.3
15.9
Vo
15.1
V
6.76
7.94
7.35
mA
Output current
-
300
Io
-
Vp-p
Output ripple
-
0.15
V
P
0.05
畏
%
Power conversion e fficiency
88
-
93
Conditions
-30 -20
-10 0
10
20
30
40
50
60
70
80
90
Ambient Temperature Ta(
擄C
)
Output voltage
control characteristic (Ta=25擄C)
V
O
-V
CTL
Characteristics (VMin=20V)
Output Voltage Vo (V)
20
15
10
5
0
0
1
2
3
4
5
Control Voltage (DC) V
CTL
(V)
Application circuit
BP5811
Output Voltage Vo (V)
BP5811
1
2
3
6
7
8
9
V
O
-Duty Characteristics (VMin=20V)
20
15
10
5
0
0
20
40
60
80
100
Control Duty f
CTL
=50kHz Duty(%)
L1
WMin
C1
CTL
Be sure to use fuse for safety.
Vo
C2
Conversion efficiency
(VMin=20V, V
CTL
=5V)
100
90
80
70
60
50
40
30
20
10
0
0
Conversion Efficiency (%)
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)
470
碌
F/50V Low impedance
Recommended part : PM series (Nichicon)
470
碌
F/50V Low impedance
Recommended part : PM series (Nichicon)
47
碌
H, Rated current 1.2A or higher
Recommended part : TSL0808-470K1R2 (TDK)
50
100
150
200
250
300
Output Current I
O
(mA)
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
1
2
3
