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MP3021DQ-LF-Z

P1-P3P4-P6P7-P9P10-P10
MP3021 – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP WLED BACKLIGHT DRIVER
MP3021 Rev. 1.0 www.MonolithicPower.com 4
11/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
V
BATT
= 4.2V, T
A
= +25°C, unless otherwise noted.
100
90
80
70
60
50
40
30
20
EFFICIENCY (%)
2.5 3.0 3.5 4.0 4.5
BATTERY VOLTAGE (V)
Efficiency vs
Battery Voltage
I_LED=30mAI_LED=20mA
I_LED=10mA
2.50 3.50 4.50 5.50
60
40
20
0
-20
-40
LED Current Deviation (LC)
vs Battery Voltage
1.00
0.50
0.00
-0.50
-1.00
LED CURRENT (mA)
2.50 3.50 4.50 5.50
BATTERY VOLTAGE (V) BATTERY VOLTAGE (V)
LED Current Deviation (HC)
vs Battery Voltage
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
LED CURRENT (mA)
BRIGHT LEVEL
LED Current (LC) Over
32 Brightness Levels
35
30
25
20
15
10
5
0
LED CURRENT (mA)
0 5 10 15 20 25 30
BRIGHT LEVEL
LED Current (HC) Over
32 Brightness Levels
0 5 10 15 20 25 30
LED3
LED3
LED1
LED4
LED2
LED2
LED1
LED4
100
90
80
70
60
50
40
30
20
10
EFFICIENCY (%)
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
BATTERY VOLTAGE (V)
Efficiency with Different
LED Voltage
VF=3.4V
VF=3.3V
VF=3.2V
I_LED=20mA
MP3021 – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP WLED BACKLIGHT DRIVER
MP3021 Rev. 1.0 www.MonolithicPower.com 5
11/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
V
BATT
= 4.2V, T
A
= +25°C, unless otherwise noted.
DATA
2V/div.
I
BAT
50mA/div.
CP
2V/div.
I
BAT
100mA/div.
CP
2V/div.
I
BAT
100mA/div.
CP
2V/div.
Soft Start to 1X Mode
V
IN
= 4.2V,1X Mode, 4 LED Full
Brightness
DATA
2V/div.
Soft Start to 1.5X Mode
V
IN
= 3.5V, 1.5X Mode, 4 LED Full
Brightness
DATA
2V/div.
Soft Start to 2X Mode
V
IN
= 2.7V, 2X Mode, 4 LED Full
Brightness
CP
2V/div.
C1A
2V/div.
C1B
2V/div.
Mode Change
From 1X to 1.5X
V
IN
= 3.3V,4 LED Full Brightness
CP
2V/div.
C1A
2V/div.
C1B
2V/div.
Mode Change
From 1.5X to 2X
V
IN
= 2.7V, 4 LED Full Brightness
C1A
2V/div.
400ns/div.
Charge Pump Waveform
at 1.5X Mode
V
IN
= 3.06V, 4 LED Full Brightness,
1.5X Mode
400ns/div.
Charge Pump Waveform
at 2X Mode
V
IN
= 3.06V, 4 LED Full Brightness,
2X Mode
I
BAT
100mA/div.
I
BAT
100mA/div.
C1B
2V/div.
C2A
2V/div.
C2B
2V/div.
C1A
2V/div.
C1B
2V/div.
C2A
2V/div.
C2B
2V/div.
MP3021 – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP WLED BACKLIGHT DRIVER
MP3021 Rev. 1.0 www.MonolithicPower.com 6
11/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
BLOCK DIAGRAM
Timer
Block
Enable
Logic
OverTemp
Det
UnderV
Det
Serial Data
Link
BG
ISET
Brightness
Control /
Iref Setting
Soft Start /
Ramp Controller
1.2 MHz Osc
Current
Sources
X4 (LED)
FAULT
LED0
LED1
LED2
LED3
VAR
Charge Pump
(Switches,
Control,
Crivers)
Control
Block
3-Bit SM
DATA
VIN
VSS
C1A
C1B
C2A
C2B
CP
Figure 1—Functional Block Diagram
P1-P3P4-P6P7-P9P10-P10

MP3021DQ-LF-Z

Mfr. #:
Buy MP3021DQ-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Display Drivers Charge Pump Backlight
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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