Data Sheet
0 to 19V/300mA Output
Broad output DC/DC Converter(Non-isolated)
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
Unit
V
V
mA
°C
°C
°C
100
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
Derating Curve
Output Current Io(mA)
Max.
21.0
5.0
100
Unit
V
V
kHz
Conditions
I
O
=300mA
Derating Curve
350
300
250
200
150
100
50
0
Vctl=5V
Vctl=4V
Vctl=3V
Vctl=2V
Vctl=1V
-30 -20
-10 0
10
20
30
40
50
60
70
80
90
Electrical Characteristics
(Unless otherwise specified,VM
IN
=20V, I
O
=300mA. V
CTL
=5.0V, Ta=25
°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
%
Power conversion e fficiency
88
93
Ambient Temperature Ta(˚C)
Conditions
Output Voltage Control
Characteristics
(Ta=25°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
Output Voltage Vo (V)
V
O
-Duty Characteristics (VMin=20V)
20
15
10
5
0
0
20
40
60
80
100
Control Duty f
CTL
=50kHz Duty(%)
BP5811
1
2
3
6
7
8
9
L1
VMin
C1
CTL
Be sure to use fuse for safety.
Vo
C2
External Component Specifications
FUSE: Fuse
C1: Input smoothing
capacitor
C2: Output smoothing
capacitor
L1: Power inductor
Use a quick-acting fuse (2.3A)
470 F/50V Low impedance
Recommended part : PM series (Nichicon)
470 F/50V Low impedance
Recommended part : PM series (Nichicon)
47 H, Rated current 1.2A or higher
Recommended part : TSL0808-470K1R2 (TDK)
Conversion Efficiency (%)
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
Conversion Efficiency
(VMin=20V, V
CTL
=5V)
100
90
80
70
60
50
40
30
20
10
0
0
50
100
150
200
250
300
Output Current I
O
(mA)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/1
2010.03 -
Rev. B
TI技术论坛
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
