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. zApplications LCD panel, Tuner. zFeatures 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. zAbsolute maximum ratings (Ta=25°C) Parameter Power supply voltage Symbol Limits Unit VIN 7 V Operating temperature range Topr 0 to 60 °C Storage temperature range Tstg −30 to +85 °C zBlock diagram CURRENT SENSOR TRANSFORMER SW CTRL CONTROL CIRCUIT 9 8 7 4 3 2 1 VIN VCTL GND GND Vref VOUT Co ON / OFF Rev.A 1/3 BP5326 Power Module zPin descriptions Pin No. Pin name Function 1 Co Output smoothing capacitor connection pin ; connect a low-impedance capacitor with a recommended capacitance of 47µF between this and GND. 2 VOUT Output pin. 3 Vref Output voltage adjustment pin for contrast ; output voltage is adjusted by connecting a resistor between pins 2 and 3 or pins 3 and 4. 4, 7 GND Ground pin. 8 VCTL Output ON/OFF control pin ; output starts when the pin is HIGH level, and stops when the pin is LOW or OPEN. 9 VIN Input pin ; connect a low-impedance capacitor with a recommended capacitance of 100µF between this pin and GND. zElectrical characteristics (Unless otherwise noted, Ta=25°C, VCTL=5V, R1 to R2 resistors are disconnected) Parameter Symbol Min. Typ. Max. Unit Conditions Input voltage VIN 4.5 5.0 Output current IOUT − − 5.5 V − 25 mA − Output voltage VOUT1 28.0 29.5 31.0 V VIN=4.5 to 5.5V, IOUT=0 to 25mA Output voltage when OFF VOUT2 − − 0.3 V VIN=4.5 to 5.5V, VCTL=0V Ripple noise voltage υ1 − 100 200 mVP-P Efficiency η 67 77 − % VIN=5V, IOUT=20mA ON / OFF CTL voltage when ON VCTL 1.5 − − V VIN=5V, Vo>28V ON / OFF CTL voltage when OFF VCTL − − 0.5 V VIN=5V, Vo<0.3V ON / OFF CTL current ICTL − − 500 µA VIN=5V, VCTL=1.5V Current consumption when OFF IOFF − − 50 µA VIN=5V, VCTL=0V (Alternatively, when OPEN) VIN=5V, IOUT=20mA ∗ ∗ Measured with a band width of 20 MHz. z Measurement circuit / Application example BP5326 1 9 8 7 4 3 2 Be sure to use fuse for safety VIN VOUT R1 VCTL R2 + + 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 z 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. VIN=5V OUTPUT VOLTAGE: Vo (V) OUTPUT VOLTAGE : Vo (V) VIN=5V 35 30 25 20 15 100k 1M 10M 100k FEED BACK RESISTANCE : R1 (W) 1M 10M FEED BACK RESISTANCE : R2 (W) Fig.3 Output voltage and Fig.2 Output voltage vs. feedback resistance (R2) feedback resistance (R1) zExternal dimensions (Unit : mm) BP5326 6.4 Max. 26.0 Max. 3±0.5 14.7 Max. Unmarked side Marked side 1 2 3 4 7 8 9 0.25±0.05 P=2.54±0.2 0.5±0.1 1.3±0.2 2.54´8=20.32 1.3±1.2 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