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NCP5810 Dataheets PDF



Part Number NCP5810
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description Dual 1 W Output AMOLED Driver Supply
Datasheet NCP5810 DatasheetNCP5810 Datasheet (PDF)

NCP5810 Dual 1 W Output AMOLED Driver Supply The NCP5810 is a dual−output DC/DC converter which can generate both a positive and a negative voltage. Both PWM converters achieve high efficiency for portable application. Thanks to the high output voltage accuracy and signal integrity the NCP5810 is particularly suitable for powering applications such as AMOLED display drivers. The output voltage of the inverter is fully configurable using external feedback resistors, where the output voltage of th.

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NCP5810 Dual 1 W Output AMOLED Driver Supply The NCP5810 is a dual−output DC/DC converter which can generate both a positive and a negative voltage. Both PWM converters achieve high efficiency for portable application. Thanks to the high output voltage accuracy and signal integrity the NCP5810 is particularly suitable for powering applications such as AMOLED display drivers. The output voltage of the inverter is fully configurable using external feedback resistors, where the output voltage of the boost is internally fixed. The switching regulator operates at 1.75 MHz which allows the use of small inductors and ceramic capacitors. In addition both converters are internally compensated which simplifies the design and reduces the PCB component count. Cycle−by−cycle peak current limit and thermal shut down provide value added features to protect the device. The NCP5810 is housed in a low profile space efficient 3 x 3 x 0.55 mm LLGA package. Features http://onsemi.com 1 12 PIN LLGA MU SUFFIX CASE 513AD MARKING DIAGRAM 5810 AYWG G 5810 = Device Code A = Assembly Location Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may be in either location) www.DataSheet4U.com • • • • • • • • • High Overall Efficiency: 83% (Refer to Figure 4) Low Noise 1.75 MHz PWM DC/DC Converter Positive Output Fixed + 4.6 V Negative Output from − 2.0 to − 15.0 V High Output Voltage Accuracy Excellent Line Transient Rejection Soft Start to Limit Inrush Current Enable Control Facility with True−Shut Down Small LLGA 3 x 3 x 0.55 mm Package Typical Applications VOUTP SWP PGND AGND VREF VS 1 2 3 12 11 10 LXP PVIN SWN EN AVIN FBN • AMOLED Driver Supply ♦ ♦ ♦ ♦ ♦ Cellular Phones MP3 Player Digital Cameras Personal Digital Assistant and Portable Media Player GPS NCP5810 4 5 6 9 8 7 (Top View) 12−pin 3 x 3 x 0.55 mm LLGA Exposed pad must be soldered to PCB Ground plane ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 12 of this data sheet. © Semiconductor Components Industries, LLC, 2007 1 April, 2007 − Rev. 0 Publication Order Number: NCP5810/D NCP5810 VBAT U1 11 12 L1 4.7 mH LXP PVIN C1 4.7 mF 3 SWP VOUTP 2 1 VOUTP C3 4.7 mF PGND ENABLE 9 EN NCP5810 VS 6 VBAT C2 1 mF 8 AVIN AGND VREF D1 FBN SWN 10 VOUTN C4 4.7 mF 4 5 7 R2 D1: ON NSR0320MW2 L1, L2: TDK VLF3010AT−4R7 C1: 4.7 mF 6.3 V X5R C2: 1 mF 6.3 V X5R 0603 C1,C3,C4: 4.7 mF 6.3 V X5R 0805 56 k C5 0.1 mF R1 536 k L2 4.7 mH C6 10 pF Figure 1. Typical Application Circuit Option of powering Vbat CINA 1 mF AVIN PVIN CINP 4.7 mF L1 4.7 mH D2 LXP SWP Thermal Shut down VOUTP MP0 COUTP 4.7 mF VOUTP ENABLE EN BOOST PWM CONTROLLER MN1 Bangap 1.26 V Osc 1.75 Mhz MP1 VS SWN Verf 1.26 V D1 VOUTN COUTN 4.7 mF R1 NEGATIVE BUCK PWM CONTROLLER 4.7 mH L2 AGND FBN PGND VREF 0.1 mF R2 10 pF Figure 2. Simplified Block Diagram http://onsemi.com 2 NCP5810 PIN FUNCTION DESCRIPTION Pin 1 Pin Name VOUTP Type OUTPUT Description Positive Power Output: A filter capacitor is necessary on this pin for the stability of the loop, to smooth the current flowing into the load, and limit the noise created by the fast transients present in this circuitry. A 4.7 mF ceramic bypass capacitor to GND is recommended. Cares must be observed to avoid EMI through the PCB copper tracks connected to this pin. Switch LXP: Positive power switch pin where one end of the L1 inductor is connected. Typical application uses a 4.7 mH inductor. Power Ground: This pin is the power ground and carries the high switching current. A high quality ground must be provided to avoid any noise spikes/uncontrolled operation. Cares must be observed to avoid high−density current flow in a limited PCB copper track. Analog Ground: This pin is the analog ground of the device notably used by VREF. Voltage Reference: This output provides a 1.265 V voltage reference used notably for the negative feedback resistive network. Positive Output Voltage Sense: This pin is the output voltage sense input for the positive boost converter and must be connected to COUTP bypass capacitor. Feedback Negative: This pin is the feedback voltage input for the negative Buck−Boost inverter. The middle point of a resistive bridge divider must be connected here. The resistive network must be connected between VREF and the anode of external Schottky. Analog Power Supply: The external voltage supply is connected to this pin. A 4.7 mF ceramic capacitor must be connected across this pin and the power ground to achieve the specified output power parameters. Enable: An active high logic level on this pin enables the circuit. A built−in pull−down resistor disables the device if the pin is left open. Also in disable condition the device provide a true cut−off from PVIN to VOUTP and SWN. Switch Negative: Negative power switch pin where one end of the L2 inductor is connected. Typical application uses a 4.7 mH inductor. Power Supply: This pin is the power supply of t.


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