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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. 5) Surface mounting is possible because parts are concentrated on one side.
Absolute maximum ratings (Ta=25C)
Parameter Power supply voltage Operating temperature range Storage temperature range Symbol VIN Topr Tstg Limits 7 0 to 60 -30 to +85 Unit V C C
Block diagram
TRANSFORMER
CURRENT SENSOR
SW CTRL
CONTROL CIRCUIT
ON / OFF
9
VIN
8
VCTL
7
GND
4
GND
3
Vref
2
VOUT
1
Co
Rev.A
1/3
BP5326
Power Module
Pin descriptions
Pin No. 1 2 3 4, 7 8 Pin name Co VOUT Vref GND VCTL Function Output smoothing capacitor connection pin ; connect a low-impedance capacitor with a recommended capacitance of 47F 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 100F between this pin and GND.
9
VIN
Electrical characteristics (Unless otherwise noted, Ta=25C, VCTL=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 current Current consumption when OFF
Measured with a band width of 20 MHz.
Symbol VIN IOUT VOUT1 VOUT2 1 VCTL
Min. 4.5 - 28.0 - - 67 1.5 -
Typ. 5.0 - 29.5 - 100 77 - -
Max. 5.5 25 31.0 0.3 200 - - 0.5
Unit V mA V V mVP-P % V
Conditions - - VIN=4.5 to 5.5V, IOUT=0 to 25mA VIN=4.5 to 5.5V, VCTL=0V VIN=5V, IOUT=20mA VIN=5V, IOUT=20mA VIN=5V, Vo>28V
VCTL
(Alternatively, when OPEN) - - - - 500
V
VIN=5V, Vo<0.3V
ICTL
A A
VIN=5V, VCTL=1.5V
IOFF
50
VIN=5V, VCTL=0V
Measurement circuit / Application example
BP5326
1
2
3
4
7
8
9
Be sure to use fuse for safety
VOUT
R1 R2
VIN
VCTL
+
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.A
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 35m 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.
VIN=5V
OUTPUT VOLTAGE : Vo (V)
VIN=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
30.5
1
2
3
4
7
8
9 0.250.05
P=2.540.2 0.50.1 1.30.2 2.548=20.32 1.31.2
SIP9
Rev.A
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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