ELP3100 Dual Channel Charge Pump Power Solution - E-CMOS

ELP3100 Dual Channel Charge Pump Power Solution - E-CMOS
Dual Channel Charge Pump Power
Solution For TFT LCD Panel
ELP3100
General Description
The ELP3100 DC/DC converter integrates two low noise , high efficiency charge pumps for dual outputs ,which
consist of one inverting output and a step-up output. The device operates from 2.5 V to 4.8V input, and provides a
step-up output voltage (VP) of 2x the input voltage . The negative inverting output (VN) is-1x inverted from the
positive output VP. The ELP3100 is available in a small TDFN-12 pin package that features a bottom side exposed
thermal pad to provide optimal heat dissipation . The small package size and low external parts count
make the device ideally suit able for TFT LCD applications of mobile products . The device is rated to operate
from – 40℃ to +85℃ ambient temperature range .
Features
◆ Ultra -low – Noise for RF Application.
◆ 2.5 V to 4.8 V Input Supply Voltage Range.
◆ Adaptive 1.5x / 2x mode switch over for positive.
voltageand-1xmodefornegativevoltage.
◆ VP output range : 5.4V to 5.9V.
◆ VN output range : -5.4V to -5.9V.
◆ High current output : Vin = 3.3V,Iout =±120mA;
◆ Built in Power On Sequence.
◆ TDFN-12 1.5mmX2.4mm Package
Applications
◆ Mobile Device , Smart Phone.
◆ Portable Media Players / MP3 players.
◆ Cellular and Smart mobile phone.
◆ LCD
Pin Assignments
E-CMOS Corp. (www.ecmos.com.tw)
1/8
5K05N-Rev. F001
ELP3100
Dual Channel Charge Pump Power
Solution For TFT LCD Panel
Pin Description
Pin No.
Pin Name
Description
1
C2P
2
VP
3
C1P
Flying Capacitor 1 Positive Terminal (C4).
4
C1N
Flying Capacitor 1 Negative Terminal (C4).
6
EN
Device Enable pin.
7
NC
No connector.
8
VIN
Input Supply Voltage . By pass VIN with a low ESR ceramic capacitor to GND.
9
C3N
Flying Capacitor 3 Negative Terminal (C6).
10
C3P
Flying Capacitor 3 Positive Terminal (C6).
11
VN
Negative output pin.
12
C2N
Flying Capacitor 2 Negative Terminal (C5).
5,13(Pad)
GND
Ground pin .
Flying Capacitor 2 Positive Terminal (C5).
Positive output pin .
Ordering Information
ELP3100 □□
□
Package type
QV:TDFN-12
F:Lead-Free
Device
Package
Marking
ELP3100
TDFN 12L
LP3100
YWX
E-CMOS Corp. (www.ecmos.com.tw)
Marking Information
1. Y:Year code
2. W:Week code
3. X:Product batch
5K05N-Rev. F001
2/8
Dual Channel Charge Pump Power
Solution For TFT LCD Panel
ELP3100
Function Block Diagram
Typical 60mA Application Circuit
E-CMOS Corp. (www.ecmos.com.tw)
5K05N-Rev. F001
3/8
ELP3100
Dual Channel Charge Pump Power
Solution For TFT LCD Panel
Typical 120mA Application Circuit
Absolute Maximum Ratings
◆ Input / Outpt Voltage to GND------------------------------------------------------------------------------ -0.3V to +6V
◆ EN to GND-------------------------------------------------------------------------------------------------
0V to VIN
◆ Operating Junction Temperature Range(TJ)--------------------------------------------------- -40℃to150℃
◆ Maximum Soldering Temperature(atleads,10sec)---------------------------------------------------------260℃
◆ Storage Temperature Range-------------------------------------------------------------------------65°Cto150°C
◆ Operation Ambient Temperature Range-------------------------------------------------------------- 0°Cto85°C
◆ Maximum Power Dissipation(PD,TA<40°C)---------------------------------------------------------------------1.5W
◆ Thermal Resistance(JA)------------------------------------------------------------------------------------------- 68℃/W
Electrical Characteristics
(VIN=VEN, C1=C2=C3=10uF,C4=C5=C6=4.7uF, Typical values are TA=25℃)
Symbol
VIN
IO
VP
VN
ISHDN
FOSC
VOL
VOH
IEN
TSD
Parameter
Input Voltage
Output Current
Positive Output Voltage
Negative Output Voltage
Shut down Current
Oscillator Frequency
EN Logic Low
EN Logic High
EN Pin Current
Thermal Shut down Temperature
Conditions
Positive Output Current
Negative Output Current
ELP3100
ELP3100
EN=GND,VIN=3.6V
IVP=IVN=10mA
Min.
2.5
Typ.
Max.
4.8
120
120
5.4
-5.9
mA
5.9
-5.4
1
300
0.4
1.4
0.5
145
E-CMOS Corp. (www.ecmos.com.tw)
5K05N-Rev. F001
4/8
Unit
V
V
µA
KHz
V
V
uA
℃
Dual Channel Charge Pump Power
Solution For TFT LCD Panel
ELP3100
Typical Operation Characteristics
E-CMOS Corp. (www.ecmos.com.tw)
5K05N-Rev. F001
5/8
Dual Channel Charge Pump Power
Solution For TFT LCD Panel
E-CMOS Corp. (www.ecmos.com.tw)
ELP3100
5K05N-Rev. F001
6/8
Dual Channel Charge Pump Power
Solution For TFT LCD Panel
ELP3100
Application Information
The ELP3100 offers dual channel output voltage for powering on specified power in TFT LCD panels . The device
integrates a positive charge pump and a Negative charge pump. Enable Control(EN) To turn on the ELP3100, the
EN pin must be at logic high. When the EN pin is pulled to a logic low, the device is disabled and the supply current
reduces to less than 1μ A.
The ELP3100 positive charge pump provides an Output voltage VP of 1.5x or 2x the input voltage. The positive
charge pump uses two external flying capacitors to generate the required output voltage . For the selected output
to input ratio, the charge pump will configure the internal switches to charge the flying capacitors. Figure1shows
the functional diagram of the positive charge pump .
NegativeChargePumpController
The negative charge pump uses one external flying capacitor to generate an inverted negative voltage that is –1x
of VP. Figure 2 shows the functional block diagram of the negative charge pump .
Figure 2. Negative Charge Pump Functional Block Diagram
Layout Consideration
Use a ground plane for the ELP3100 device that can be connected to the device expose pad and ground pin for
optimal thermal characteristics .
By pass Capacitors
Place VIN, VP, and VN by pass capacitors as close as possible to the device pin. Keep the ground traces from the
by pass to the ground plane as short as possible.
E-CMOS Corp. (www.ecmos.com.tw)
5K05N-Rev. F001
7/8
Dual Channel Charge Pump Power
Solution For TFT LCD Panel
ELP3100
Flying Capacitors
Place the flying capacitors as close to the device pins as possible to minimize trace noise since the flying
capacitors to the pins will generate high transient voltage (dv /dt ) switching signals .
Package Information
E-CMOS Corp. (www.ecmos.com.tw)
5K05N-Rev. F001
8/8
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