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MP3021DQ-LF-Z

P1-P3P4-P6P7-P9P10-P10
MP3021
1x, 1.5x, 2x Auto-Adjust Charge Pump
White LED Backlight Driver
MP3021 Rev. 1.0 www.MonolithicPower.com 1
11/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP3021 is a WLED driver that can drive up
to 4 backlight WLEDs at up to 30mA each.
Backlight brightness is adjusted using a 5-bit
register plus one bit for precise low brightness
control.
The MP3021 employs a super efficient
inductorless charge pump with 1x, 1.5x and 2x
automatic mode control to achieve high
efficiency power conversions.
Monolithic Power System’s single wire MPC
TM
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.
Each output is current limited, providing
controlled brightness and short circuit protection.
Thermal shutdown protection guards against
excessive temperatures due to circuit loads and
shorts.
The tiny 3mm x 3mm QFN 16-pin package and
small external capacitors deliver the most
compact white LED solution available.
FEATURES
• Backlight: up to 4 WLEDs at 30mA Each
• Single Wire Serial Bus (MPC
TM
Serial Data Link)
Simple, Low Overhead Solution
Fast Data Transfer Rate
• Good Current Matching at Low LED Current
• Thermal Shutdown Protection
• Under-Voltage Protection
• Available in a 3mm x 3mm 16-Pin QFN Package
• Low EMI Noise
APPLICATIONS
• Cellular Phones
• PDA Phones
• PDAs
• Other Small Portable Displays
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
“MPC” is a Trademark of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP3021
LED0
LED1
LED2
LED3
CP
16
15
14
13
1
VIN
C1A
C1B
C2A
C2B
DATA
ISET
VSS
7
4
3
6
2
8
11
5
BATT
SINGLE PIN SERIAL PORT
D1 D2 D3 D4
120mA Total Backlight
COMMON ANODE
CONFIGURATION
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
MP3021 – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP WLED BACKLIGHT DRIVER
MP3021 Rev. 1.0 www.MonolithicPower.com 2
11/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
PACKAGE REFERENCE
TOP VIEW
EXPOSED PAD
CONNECT TO PIN 5
PIN 1 ID
CP
C2B
C1B
C1A
NC
ISET
NC
NC
1
2
3
4
13141516
8765
DATA
VINC2AVSS
LED3LED2LED1LED0
12
11
10
9
Part Number* Package Temperature
MP3021DQ
QFN16
(3mm x 3mm)
–40°C to +85°C
*
For Tape & Reel, add suffix –Z (eg. MP3021DQ–Z)
For RoHS compliant packaging, add suffix –LF (eg.
MP3021DQ–LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
All Other Pins.............................. –0.3V to +6.5V
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature ..............–65°C to +150°C
Supply Voltage VIN ........................... 2.5V to 6V
Operating Temperature .............–40°C to +85°C
Recommended Operating Conditions
(2)
Supply Voltage V
IN
.......................... 2.7V to 5.5V
Operating Temperature .............–40°C to +85°C
Thermal Resistance
(3)
θ
JA
θ
JC
QFN16 (3mm x 3mm) ............. 60 ...... 12... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
V
IN
= 4.2V, T
A
= +25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
Input Supply Voltage V
IN
2.7 5.5 V
Supply Current I
IN
1X Mode; I
LED ea
= 20mA 83.6 mA
Supply Current Shutdown I
IN SHDN
V
DATA
= 0V 0.1 1.0 µA
Current Matching
(4)
I
LED MATCH
I
LED
= 20mA 1.5 3.0 %
DATA Voltage, High V
DATA (HIGH)
1.2 V
DATA Voltage, Low V
DATA (LOW)
0.4 V
DATA Pin Leakage I
DATA
V
DATA
= 5V -1.0 +1.0 µA
Data Acceptance Pulse Width T
DAPW
1.5 3.5 µs
Data Stop Pulse Width T
DSPW
8 µs
Charge Pump Frequency F
CP
V
IN
= 3.3V 1.0 1.25 1.5 MHz
Voltage of ISET V
ISET
1.25 V
HC/LC = 0, R1=4.17kΩ 30 mA
Backlight LED Current for each
LED
I
BL
HC/LC = 1,
R1=6.25kΩ 2 2.2 mA
HC/LC = 0, R1=6.25kΩ 20 22 mA
Thermal Shutdown
(5)
T
S
150
°C
Note:
4) Current matching definition: (Max – Min)/(Max + Min)
5) Guaranteed by design.
MP3021 – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP WLED BACKLIGHT DRIVER
MP3021 Rev. 1.0 www.MonolithicPower.com 3
11/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin # Name Description
1 CP Charge pump bypass for common anode version. Connect a 1µF bypass capacitor to GND.
2 C2B
Charge Pump Capacitor #2 Negative Node. Connect the negative side of the #2 charge pump
capacitor to C2B.
3 C1B
Charge Pump Capacitor #1 Negative Node. Connect the negative side of the #1 charge pump
capacitor to C1B.
4 C1A
Charge Pump Capacitor #1 Positive Node. Connect the positive side of the #1 charge pump
capacitor to C1A. Typical applications require C1 to be 1µF.
5 VSS Battery Power Ground. Connect the exposed pad to this pin.
6 C2A
Charge Pump Capacitor #2 Positive Node. Connect the positive side of the #2 charge pump
capacitor to C2A. Typical applications require C2 to be 1µF.
7 VIN
Battery Power Input. Connect the 2.5V to 5.5V input source between BATT and GND. Bypass
BATT to GND with a 1µF or greater capacitor.
8 DATA
Data Input and Single Pin Serial Port for Control of All Functions. See Part Description. An
external pill-down resistor with a typical value of 100k
Ω
is required.
9, 10,
12
NC No Connect.
11 ISET
Current Control Input. Connect a resistor between ISET and GND to set the backlight LED
string current up to 30mA each
13 LED3
#4 LED Driver for Backlight. Connect a backlight LED between this pin and BATT, with the
anode at BATT. If this pin is not used, leave the pin open.
14 LED2
#3 LED Driver for Backlight. Connect a backlight LED between this pin and BATT, with the
anode at BATT. If this pin is not used, leave the pin open.
15 LED1
#2 LED Driver for Backlight. Connect a backlight LED between this pin and BATT, with the
anode at BATT. If this pin is not used, leave the pin open.
16 LED0
#1 LED Driver for Backlight. Connect a backlight LED between this pin and BATT, with the
anode at BATT. If this pin is not used, leave the pin open.
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.
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