BP5326
Power Module
DC/DC converter step-up
BP5326
Suitable for LCD panels, tuner power supply. Only additional electrolysis capacitor, the source of step-up power supply
can be constituted easily.
Applications
LCD panel, Tuner.
Features
1) High conversion efficiency.
2) Built-in protection circuit.
3) Built-in ON / OFF switch.
4) Compact and light.
Absolute maximum ratings
(Ta=25°C)
Parameter
Power supply voltage
Operating temperature range
Storage temperature range
Maximum Output current
Symbol
V
IN
Topr
Tstg
Iomax
Limits
7
−10
to 60
−30
to
+85
25
Unit
V
°C
°C
mA
Block diagram
TRANSFORMER
CURRENT
SENSOR
SW CTRL
CONTROL
CIRCUIT
ON / OFF
9
V
IN
8
V
CTL
7
GND
4
GND
3
Vref
2
V
OUT
1
Co
Rev.C
1/3
BP5326
Power Module
Pin descriptions
Pin No.
1
2
3
4, 7
8
Pin name
Co
V
OUT
Vref
GND
V
CTL
Function
Output smoothing capacitor connection pin ; connect
a low-impedance capacitor with a recommended
capacitance of 47µF between this and GND.
Output pin.
Output voltage adjustment pin for contrast ; output
voltage is adjusted by connecting a resistor between
pins 2 and 3 or pins 3 and 4.
Ground pin.
Output ON/OFF control pin ; output starts when the
pin is HIGH level, and stops when the pin is LOW
or OPEN.
Input pin ; connect a low-impedance capacitor with
a recommended capacitance of 100µF between
this pin and GND.
9
V
IN
Electrical characteristics
(Unless otherwise noted, Ta=25°C, V
IN
=5V, Io=20mA, V
CTL
=5V, R1 to R2 resistors are disconnected)
Parameter
Input voltage
Output current
Output voltage
Output voltage when OFF
Ripple noise voltage
Efficiency
ON / OFF CTL voltage
when ON
ON / OFF CTL voltage
when OFF
ON / OFF CTL input current
Current consumption
when OFF
∗
Measured with a band width of 20 MHz.
Symbol
V
IN
I
OUT
V
OUT
1
V
OUT
2
υ1
η
V
CTL
Min.
4.5
−
28.0
−
−
67
1.5
−
−
−
Typ.
5.0
−
29.5
−
100
77
−
−
−
−
Max.
5.5
25
31.0
0.3
200
−
−
Unit
V
mA
V
V
mV
P-P
%
V
Vo>28V
Conditions
−
−
V
IN
=
4.5 to 5.5V, I
OUT
=
0 to 25mA
V
IN
=
4.5 to 5.5V, V
CTL
=
0V
−
−
∗
V
CTL
0.5
V
µA
µA
Vo<0.3V, Altematively, when OPEN
I
CTL
500
V
CTL
=
1.5V
V
CTL
=
0V
I
OFF
50
Measurement circuit / Application example
BP5326
1
2
3
4
7
8
9
Be sure to use
fuse for safety
V
OUT
R1
R2
V
CTL
V
IN
+
C2
+
C1
GND
GND
Fig.1
C1 : 100mF / 16V
(Low impedance)
C2 : 47mF / 35V
(Low impedance)
R1, 2 :
Resistors for adjusting output voltage (Contrast adjustment)
Rev.C
2/3
BP5326
Power Module
Electrical characteristics curves
(1) Place I / O external capacitors as near as possible to the connection pins. In particular make sure to minimize the
impedance between the input-side capacitor (C1) and pin9. A length less than 50mm is recommended for a copper
foil of 1.0mm wide 35µm trick.
(2) Avoid frequent switching using the ON / OFF CTL pin (five times per second at the maximum).
(3) R1 and R2 resistors, which are used for changing the output voltage, are usually not required.
V
IN
=5V
OUTPUT VOLTAGE : Vo (V)
V
IN
=5V
OUTPUT VOLTAGE: Vo (V)
25
35
20
30
15
100k
1M
10M
100k
1M
10M
FEED BACK RESISTANCE : R1 (W)
FEED BACK RESISTANCE : R2 (W)
Fig.2
Output voltage vs.
Fig.3
Output voltage and
feedback resistance (R1)
feedback resistance (R2)
External dimensions
(Unit : mm)
BP5326
26.0 Max.
6.4 Max.
Unmarked side
14.7 Max.
Marked
side
3±0.5
1
2
3
4
7
8
9
0.25±0.05
1.6MAX.
P=2.54±0.2
0.5±0.1
1.3±0.2
2.54´8=20.32
1.3±1.2
SIP9
Rev.C
3/3
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1
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