BP5311xA

DC / DC converter for LCDs BP5311A / BP5311XA The BP5311A and BP5311XA are DC / DC converters for supplying power to liquid crystal display (LCD) panels. The modules supply a positive voltage for LCDs from a logic circuit power supply (+5). They are available in a single in-line package as an upright (BP5311A) or L-shaped lead (BP5311XA) type. Applications LCD panels in personal computers and word processors. 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. 6) Available as an upright or L-shaped lead type. Absolute maximum ratings (Ta=25°C) Parameter Power supply voltage Operating temperature range Storage temperature range Symbol VIN Topr Tstg Limits 7 0~60 −30~+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 1/4 Free Datasheet http://www.datasheet4u.com/ BP5311A / BP5311XA 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 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 th...