MP1529DR MPS [Monolithic Power Systems], MP1529DR Datasheet

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MP1529DR

Manufacturer Part Number
MP1529DR
Description
Fixed Frequency Step-Up Converter LCD Backlight Plus Flash
Manufacturer
MPS [Monolithic Power Systems]
Datasheet
1.MP1529DR.pdf (11 pages)

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
MP1529DR-LF-Z
Manufacturer:
MPS/美国芯源
Quantity:
20 000
Company:
H&T Electronics H&T Electronics
Part Number:
MP1529DR-LF-Z
Quantity:
291
The Future of Analog IC Technology
DESCRIPTION
The MP1529 is a step-up converter plus 3
current sources for driving two 6-LED backlight
strings to 30mA and a 4-LED flash string to
150mA from a single Lithium-Ion battery.
The step-up converter generates an output
voltage as high as 25V from a 2.7V to 5.5V
input source. Three current sources drive in
three modes. In backlight mode two strings of 6
LEDs are lit with up to 30mA of current. In the
backlight plus preview mode the 4 flash LEDs
are lit with the preview current. In flash mode
the flash LEDs are lit with up to 150mA of
current and the two backlight strings are turned
off. There are three pins to independently set
the backlight, preview and flash current.
The MP1529 includes built-in open lamp over
voltage protection, cycle-by-cycle current limit,
over temperature shutdown, input under voltage
control and integrated soft-start.
The MP1529 is available in a tiny 16-pin 4mm x 4mm
package.
TYPICAL APPLICATION
MP1529 Rev. 1.0
11/23/2005
GND
EN1
EN2
V
IN
10nF
C4
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
16
10
11
1
2
3
4
9
6
IN
EN1
EN2
COMP
SS
ISET1
ISET2
ISET3
GND
MP1529
PGND
LED1
LED2
LED3
OUT
SW
14
12
8
7
5
13, 15
© 2005 MPS. All Rights Reserved.
www.MonolithicPower.com
D1
TM
TM
Fixed Frequency Step-Up Converter
MP1529_TAC_S01
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
APPLICATIONS
•
•
•
•
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
2.7V to 5.5V Input Voltage Range
25V Maximum Step-Up Voltage
<1µA Shutdown Mode
1.2MHz Fixed Frequency Operation
LCD Backlight to 30mA, Flash to 150mA
Cycle-By-Cycle Current Limit
Independent Backlight, Preview and Flash
Current Adjustment
Special PWM Dimming
Over Voltage Protection
Under Voltage Lockout
Integrated Soft-Start
Thermal Shutdown
Tiny 4mm x 4mm QFN Package
PDAs
Cellular Phones
Digital Still Cameras
Digital Video Cameras
V
OUT
LCD Backlight Plus Flash
82
80
78
76
74
72
Efficiency vs LED Current
(Backlight Mode, 2 Strings of 3 LEDs)
2
4
LED CURRENT (mA)
6
V
8 10 12 14 16 18 20
IN
=4.2V
MP1529
V
IN
=2.7V
V
IN
=3.6V
MP1529_EC01
1

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MP1529DR Summary of contents

Page 1

The Future of Analog IC Technology DESCRIPTION The MP1529 is a step-up converter plus 3 current sources for driving two 6-LED backlight strings to 30mA and a 4-LED flash string to 150mA from a single Lithium-Ion battery. The step-up converter ...

Page 2

... EXPOSED PAD ON BACKSIDE CONNECT TO PIN 6 Part Number* Package QFN16 MP1529DR (4mm x 4mm) * For Tape & Reel, add suffix –Z (eg. MP1529DR–Z) For Lead Free, add suffix –LF (eg. MP1529DR–LF–Z) ELECTRICAL CHARACTERISTICS V = 3.6V +25°C, unless otherwise noted Parameter Shutdown Supply Current ...

Page 3

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH ELECTRICAL CHARACTERISTICS V = 3.6V +25°C, unless otherwise noted Parameter Current Sense to COMP Transconductance Oscillation Frequency SW Maximum Duty Cycle EN1, EN2 High Voltage ...

Page 4

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH TYPICAL PERFORMANCE CHARACTERISTICS Circuit of Figure 3.6V, 3 LEDs on LED1, 3 LEDs on LED2, 3 LEDs on LED3 20mA 40mA, ...

Page 5

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH TYPICAL PERFORMANCE CHARACTERISTICS Circuit of Figure 3.6V, 3 LEDs on LED1, 3 LEDs on LED2, 3 LEDs on LED3 20mA 40mA, ...

Page 6

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH BLOCK DIAGRAM VIN PWM COMP & OSC SOFT-START/ SS PWM TIMER EN1 LOGIC EN2 ISET1 CURRENT ISET2 PROGRAM ISET3 MP1529 Rev. 1.0 11/23/2005 MPS Proprietary Information. Unauthorized Photocopy and ...

Page 7

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH OPERATION The MP1529 white LED driver performs both dual string backlight and single string flash functions for portable applications. The features include pulse width modulated (PWM) dimming of the ...

Page 8

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH Mode EN1 Off L Backlight H (PWM) Backlight plus H (PWM) Preview Flash L Notes: 5) Backlight and Backlight plus Preview may use PWM for backlight brightness control. Only ...

Page 9

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH Selecting the Inductor The inductor is required to force the output voltage higher while being driven by the lower input voltage. Choose an inductor that does not saturate at ...

Page 10

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH TYPICAL APPLICATION CIRCUITS V IN EN1 EN2 C4 10nF GND Figure 2— Driving 1 Backlight String (20mA per WLED) and 1 Flash String (40mA Preview EN1 EN2 ...

Page 11

TM MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH TYPICAL APPLICATION CIRCUITS V IN EN1 EN2 C4 10nF GND Figure 4—Driving Backlight Strings (20mA per WLED) and 1 Flash String (40mA Preview, PACKAGE INFORMATION 3.950 ...

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