BP5326

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. zAbsolute maximum ratings (Ta=25°C) Parameter Power supply voltage Operating temperature range Storage temperature range Maximum Output current Symbol Limits Unit VIN 7 V Topr −10 to 60 °C Tstg −30 to +85 °C Iomax 25 mA 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.C 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, VIN=5V, Io=20mA, 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 Output voltage when OFF VOUT2 − 29.5 31.0 V VIN=4.5 to 5.5V, IOUT=0 to 25mA − 0.3 V VIN=4.5 to 5.5V, VCTL=0V Ripple noise voltage υ1 − 100 200 mVP-P − Efficiency η 67 77 − % − ON / OFF CTL voltage when ON VCTL 1.5 − − V Vo>28V ON / OFF CTL voltage when OFF VCTL − − 0.5 V Vo