MPS EV3021DQ-00A 1x, 1.5x, 2x auto-adjust charge pump white led backlight evaluation board Datasheet

EV3021DQ-00A
1x, 1.5x, 2x Auto-Adjust Charge Pump
White LED Backlight Evaluation Board
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The EV3021DQ-00A is the Evaluation Board for
the MP3021, a WLED driver that can drive up to
4 backlight WLEDs at up to 30mA each.
Backlight brightness can be adjusted with a
5-bit register plus one bit for precise low
brightness control.
•
•
•
•
•
Backlight: up to 4 WLEDs at 30mA Each
Single Wire Serial Bus (MPCTM Serial Data Link)
Simple, Low Overhead Solution
Fast Data Transfer Rate
Thermal Shutdown Protection
Under-Voltage Protection
Available in a 3mm x 3mm 16-Pin QFN Package
The MP3021 employs an efficient inductorless
charge pump with 1x, 1.5x and 2x automatic
mode control to achieve high efficiency power
conversions.
APPLICATIONS
Monolithic Power System’s single wire MPCTM
serial data link provides a simple and fast
interface used to enable, disable and set
current levels for each LED. In addition,
soft-start limits the inrush current during startup
and mode switching.
MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
•
•
•
Cellular Phones
PDA Phones
PDAs
MPC is a Trademark of Monolithic Power Systems, Inc.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage
# of WLEDs
LED Current
Symbol
Value
Units
VIN
2.5 – 5.5
4
30
V
ILED
mA
EV3021DQ-00A EVALUATION BOARD
Efficiency vs
Battery Voltage
100
I_LED=10mA
EFFICIENCY (%)
90
80
70
60
50
I_LED=20mA
I_LED=30mA
40
30
(L x W x H) 2.6” x 2.5” x 0.4”
(6.6cm x 6.4cm x 1.0cm)
Board Number
MPS IC Number
EV3021DQ-00A
MP3021DQ
EV3021DQ-00A Rev. 1.2
10/18/2007
20
2.5
3.0
3.5
4.0
BATTERY VOLTAGE (V)
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
4.5
1
EV3021DQ-00A – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP
EVALUATION BOARD SCHEMATIC
R17
0
R18
0
LED2
LED3
LED4
LED2
LED0
LED1
LED1
R16
0
LED3
R15
0
CP
VCC
NC
U1
C2B
MP3021
C1B
C1A
NC
VIN
DATA
C2A
NC
VSS
JPI
ISET
VIN
GND
TP_CLKIN
VPP VCC GND GP0 GP1
TP1 TP2 TP3 TP4 TP5
TP_GP0 TP_GP1
VCC
VCC
VDD
VSS
CLKIN
GP0
PIC12F675
TP_CLKOUT
CLKOUT
GP1
VPP
GP2
U2
TP_VPP
SW3
BRIGHT DOWN
PATTERN GENERATION CIRCUIT
EV3021DQ-00A Rev. 1.2
10/18/2007
Bit5
Bit4
Bit3
Bit2
1
Bit0
BRIGHT UP
0
SW2
Bit1
SW1
TP_GP2
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
2
EV3021DQ-00A – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP
EV3021DQ-00A BILL OF MATERIALS
Qty
Ref
Value
Description
Package
4 C1,C2,C3,C4 1µF 16V/X7R Ceramic Cap. SM0603
4 LED1~LED4
NS
No Stuff
4.22kΩ
1
R1
Film Res, 1%
603
0Ω
4
R15~R18
Film Res, 5%
603
1
U1
White LED Driver
3x3 QFN16
Manufacturer
muRata
Manufacturer P/N
GRM188R71C105KA
Panasonic
Panasonic
MPS
ERJ-3EKF4221V
ERJ-3GEY0R00V
MP3021DQ
EV3021DQ-00A PATTERN GENERATION CIRCUIT BILL OF MATERIALS
Qty
1
1
1
3
5
3
2
1
Ref
C5
SW3
JP1
R6,R8,R10
R4,R5,R12,
R13,R14
R7,R9,R11
SW1,SW2
U2
EV3021DQ-00A Rev. 1.2
10/18/2007
Value
Description
Package
1µF 16V/X7R Ceramic Cap. SM0603
6 POS Top slide DIP switch
DIP 12
DIP Jumper
5.1kΩ
Film Res, 1%
603
10kΩ
15kΩ
Switch
Film Res, 1%
Film Res, 1%
Push Switch
Microcontroller
603
603
5mmx5mm
SO-8
Manufacturer
muRata
Digi-Key
Digi-Key
Panasonic
Manufacturer P/N
GRM188R71C105KA
CKN1290-ND
WM18533-ND
ERJ-3EKF5111V
Panasonic
Panasonic
Digi-Key
Microchip
ERJ-3EKF1002V
ERJ-3EKF1502V
CKN9020-ND
PIC12F675
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MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
3
EV3021DQ-00A – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP
PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Silk Layer
Figure 2—Top Layer
Figure 3—Bottom Layer
EV3021DQ-00A Rev. 1.2
10/18/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
4
EV3021DQ-00A – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP
QUICK START GUIDE
1. Solder LED1 – LED4, and Flash LED to the board if they are not populated.
2. Turn off the power supply.
3. Attach the positive terminal of the power supply (2.5V - 5.5V) to the VIN.
4. Attach the negative terminal of the power supply to GND pin.
5. Set the number of LEDs by SW3. See Table below and make sure it is in position. Always set
Mode bits to “00”.
On/Off
Bit
HC/LC
Bit
0
1
1-bit
1-bit
<0>
<1>
<0>
<1>
OFF
ON
High Current
Low Current
LED Sel
Bits
2
3
2-bits
<23>
<00>
<11>
<10>
<01>
All On
1 LED On
2 LEDs On
3 LEDs On
Mode
Bits
4
Brightness
Bits
5
6
2-bits
<45>
<00>
7
8
9
10
5-bits
BL Only
<678910>
<00000> 1 x Max Brightness / 32
<10000> 2 x Max Brightness / 32
<01000> 3 x Max Brightness / 32
<11000> 4 x Max Brightness / 32
.
.
.
.
.
.
<11111> Max Brightness
6. Turn on the power supply.
7. Push the “BRT UP” or “BRT DOWN” button to control the brightness of the LEDs. One push
represents one level brightness change. Push and hold the button will continuously increase or
decrease the brightness.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV3021DQ-00A Rev. 1.2
10/18/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
5
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