|
|
PDF NCP5810 Data sheet ( Hoja de datos )
| Número de pieza | NCP5810 | |
| Descripción | Dual 1 W Output AMOLED Driver Supply | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de NCP5810 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
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
• 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
•www.DataSheet4U.com 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
• AMOLED Driver Supply
♦ Cellular Phones
♦ MP3 Player
♦ Digital Cameras
♦ Personal Digital Assistant and Portable Media Player
♦ GPS
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)
VOUTP 1
12 LXP
SWP 2
11 PVIN
PGND 3
AGND 4
NCP5810
10 SWN
9 EN
VREF 5
8 AVIN
VS 6
7 FBN
(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
April, 2007 − Rev. 0
1
Publication Order Number:
NCP5810/D
1 page  
NCP5810
ELECTRICAL CHARACTERISTICS Min & Max Limits apply for TA between −40°C to +85°C and VIN between 2.7 V to 4.6 V (Unless
otherwise noted). Typical values are referenced to TA = +25°C and VIN = 3.7 V (Unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max Unit
POSITIVE BOOST DC/DC CONVERTER
Positive Operational Output Voltage Range
Maximum Inductor Peak Current
Switches P0 ON Resistance
Switches N1 ON Resistance
Switches N1 Leakage Current
At VIN = 4.2 V
Efficiency (Notes 8, 9)
Positive Output Current Available (Notes 9, 10)
VIN ≥ 3.1 V
VIN ≥ 2.9 V, TA between 0 to +85°C
Output Voltage Line Regulation IOUTP = 0 mA
2.7 < VIN < 4.6
Output Voltage Line Transient Overshoot (Note 12)
Power Supply Ripple Rejection (Notes 9, 13)
1.0 Hz to 1.0 kHz
1.0 kHz to 10 kHz
VOUTP
IPEAKP_MAX
P0MOS
RDSON
N1MOS
RDSON
N1MOS L
EFF
IOUTP
LINE_RP
LINE_TP
PSRRP
4.55
530
−
−
−
−
0
0
−
−
−
−
4.6
700
320
300
0.05
85
270
−
−
4
60
40
4.65
800
640
600
0.5
−
−
145
10
−
−
−
V
mA
mW
mW
mA
%
mA
mV
mV
dB
Output Voltage Load Regulation (Note 14)
Output Voltage Load Transient Response: Overshoot and
Undershoot Vs. Steady State Voltage (Notes 9, 15)
LOAD_RP
LTRP
−
−
− 0.5 %/100mA
− 100 mV
NEGATIVE BUCK DC/DC CONVERTER
Typical Negative Operational Output Voltage Range
Peak Inductor Current (Note 9)
Switches P2 ON Resistance
Switches P2 Leakage Current
At VIN = 4.2 V
Efficiency (Notes 8, 9)
Negative Output Power Available (Notes 9, 10) @ VOUTN = −5.4 V
VIN ≥ 3.1 V
VIN ≥ 2.9, TA between 0 to +85°C
Output Voltage Reference 0 mA < IREF < 100 mA
Feedback Voltage Threshold in Steady State:
2.7 < VIN < 4.6
Feedback Input Current
Output Voltage Line Regulation at IOUTN = 0 mA (Note 11)
2.7 < VIN < 4.6
Output Voltage Line Transient Overshoot (Note 12)
Power Supply Ripple Rejection (Notes 9, 13)
1.0 Hz to 1.0 kHz
1.0 kHz to 10 kHz
VOUTN
IPEAKN_MAX
P2MOS
RDSON
P2MOS L
EFF
POUTN
OVR
FBVN
FBICN
LINE_RN
LINE_TN
PSRRN
−15
620
−
−
−
−
0
−1 %
−2 %
−50
−
−
−
−
−
800
700
0.05
80
175
−
1.265
0.632
−
−
4
60
40
−2.0
920
1400
0.5
−
−
100
+1 %
+2 %
50
20
−
−
−
V
mA
mW
mA
%
mA
V
mV
nA
mV
mV
dB
Load Regulation (Notes 11, 14)
Load Transient Response: Overshoot and Undershoot Vs.
Steady State Voltage (Notes 9, 15)
LOAD RN
LTRN
−
−
− 0.5 %/100mA
− 100 mV
http://onsemi.com
5
5 Page 
NCP5810
R2 is placed between the feedback pin FBN (nom 632 mV)
and the reference pin REF. As for the boost converter, the
current flowing out of the feedback resistors must be as low
as possible to ensure high efficiency in low load conditions.
Nevertheless the feedback resistor impedance must not be
too high to keep good voltage accuracy. Therefore it is
recommended to use values in the 10 kW to 100 kW range
for the lower resistor R2. The upper feedback resistor R1
can calculated using the following equation:
ǒ ǓR1 + R2
VOUTN * VFBN
VFBN * VREF
But
:
VFBN
+
VREF
2
ǒ ǓSo: R1 + R2
2
1)
ŤV
Ť
OUTN
VREF
For example, should one need –5.4 V for VOUTN, if a
56 kW ±1% is selected of R2, R1 should be selected
according to the following equation:
ǒ ǓR1 + 56
1
)
2 5.4
1.265
+ 536 kW "1%
Inductor Selection
Three different electrical parameters need to be
considered when selecting an inductor, the absolute value
of the inductor, the saturation current and the DCR. During
normal operation, the NCP5810 is intended to operate in
Continuous Conduction Mode (CCM). The two equations
below can be used to calculate the peak current for each
converters:
IPEAK_P + hP
IOUT_P
(1 *
DP)
)
VIN
2 LP
DP
F
For the boost converter
IPEAK_N
+
IOUT_N
hN (1
DN
* DN)
)
VIN
2 LN
DN
F
For the buck−boost inverter
Where VIN is the battery voltage, IOUT_X is the load
current, L the inductor value, F the switching frequency,
and DX the duty cycle.
The global converter efficiency h varies with load
current. A good approximation is to use h = 0.8 from the
boost and h = 0.75 for the buck−boost inverter. It is
important to ensure that the inductor current rating is high
enough such that it not saturate. As the inductor size is
reduced, the peak current for a given set of conditions
increases along with higher current ripple so it is not
possible to deliver maximum output power at lower
inductor values. Finally an acceptable DCR must be
selected regarding losses in the coil and must be lower than
300 mW to limit excessive voltage drop. In addition, as
DCR is reduced, overall efficiency will improve. The
inductor value should range between 2.7 mH and 6.8 mH,
typically for each DC/DC converter, it is recommended to
use a 4.7 mH low profile inductor. Some recommended
inductors include but are not limited to:
TDK: VLF3010AT−4R7MR70 (1.0 mm)
TDK: MLP3216S2R7T (0.6 mm)
SUMIDA: CDH2D09BNP (1.0 mm)
MURAWA CXFU0208−4R7 (0.8 mm)
Schottky Diode Selection
An external diode is required for the rectification of the
negative output. The reverse voltage rating of the selected
diode must be equal to or greater than the difference
between the output voltage of the inverter and the input
voltage. The average current rating of the diode must be
greater than the maximum output load current. The peak
current rating must be larger than the maximum peak
inductor current. It is recommended to use a Schottky diode
with lower forward voltage to minimize the power
dissipation and therefore to maximize the efficiency of the
converter.
Also a particular care must be observed for parasitic
capacitance versus reverse voltage and leakage current
versus junction diode temperature. Both parameters are
impacting the efficiency in low load condition and
switching quiescent current.
Some recommended Schottky diodes include but are not
limited to:
ON SEMICONDUCTOR: NSR0320MW2
ON SEMICONDUCTOR: RB521S30
ROHM: RSX051VA−30
PHILIPS: PMEG2005AEL
Input and Output Capacitors
COUTP and COUTN store energy during the TOFF phase
and sustain the load during the TON phase. In order to
minimize the output ripple, a 4.7 mF low ESR multi−layer
ceramic capacitor type X5R is recommended. To achieve
high performances (signal integrity) two 4.7 mF 6.3 V X5R
should be used to bypass the input supply, CINP and CINA.
Also a particular care must be observed for DC−bias
effects in ceramic capacitor. Actually smaller the case−size
and higher the DC bias voltage, the bigger drop in
capacitance. For a stability viewpoint the percentage drop
in capacitance for the chosen input or output operating
voltage must be limit to 20%.
Some recommended capacitors include but are not
limited to:
4.7 mF 6.3 V 0603
TDK: C1608X5R0J475MT
TDK: CGB4B1X5R0J475M (0.5 mm)
4.7 mF 10 V 0805
TDK: C2012X5R1A475MT
MURATA: GRM219R61A475KE
http://onsemi.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet NCP5810.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| NCP5810 | Dual 1 W Output AMOLED Driver Supply | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |