DC / DC converter for LCDs
BP5311A / BP5311XA
The BP5311A and BP5311XA are DC / DC converters for supplying power to liq...
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...