MP3205 MPS, MP3205 Datasheet

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MP3205

Manufacturer Part Number
MP3205
Description
1.3mhz Fixed Frequency 5 White Led Driver
Manufacturer
MPS
Datasheet

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The Future of Analog IC Technology
DESCRIPTION
The MP3205 is a step-up converter designed
for driving up to 5 series white LEDs from a
single cell Lithium Ion battery. The MP3205
uses current mode, fixed frequency architecture
to regulate the LED current, which is measured
through an external current sense resistor. Its
low 104mV feedback voltage reduces power
loss and improves efficiency.
The MP3205 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload. The MP3205 is available in a small
5-pin TSOT23 package.
EVALUATION BOARD REFERENCE
TYPICAL APPLICATION
MP3205 Rev. 1.3
10/8/2007
V
EN
5V
IN
Board Number
EV3205DJ-00A
4
2
EN
GND
IN
5
MP3205
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
SW
FB
1
1.9”X x 1.8”Y x 0.4”Z
3
Dimensions
CMDSH-3
LED1
LED2
LED3
LED4
LED5
© 2007 MPS. All Rights Reserved.
www.MonolithicPower.com
TM
TM
MP3205-TAC-S01
FEATURES
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
On Board Power MOSFET
Drives up to 5 Series White LEDs
Up to 87% Efficiency
Over 1MHz Fixed Switching Frequency
Low 104mV Feedback Voltage
Soft-Start/PWM Dimming
UVLO, Thermal Shutdown
Internal Current Limit
Available in a TSOT23-5 Package
Cell Phones
Handheld Computers and PDAs
Digital Still Cameras
Small LCD Displays Application
88
87
86
85
84
83
82
81
80
79
78
77
1.3MHz Fixed Frequency
5
Efficiency vs
LED Current
LED CURRENT (mA)
5 White LED Driver
3 LEDs
10
4 LEDs
MP3205
15
5 LEDs
V
IN
MP3205-EC01
=3.6V
20
1

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MP3205 Summary of contents

Page 1

... The MP3205 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. The MP3205 is available in a small 5-pin TSOT23 package. EVALUATION BOARD REFERENCE Board Number Dimensions EV3205DJ-00A 1.9” ...

Page 2

... Thermal Shutdown Note: 4) Guaranteed by design. MP3205 Rev. 1.3 10/8/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP3205 – 1.3 MHz FIXED FREQUENCY 5 WHITE LED DRIVER ABSOLUTE MAXIMUM RATINGS SW ............................................... –0.5V to +28V All Other Pins.............................. –0.3V to +6.5V Storage Temperature ..............–55°C to +150°C IN Recommended Operating Conditions IN Supply Voltage ...

Page 3

... SW. SW can swing between GND and 25V. 2 GND Ground. Feedback Input. The MP3205 regulates the voltage across the current sense resistor between and GND. Connect a current sense resistor from the bottom of the LED string to GND. Connect the bottom of the LED string to FB. The regulation voltage is 104mV. ...

Page 4

... RIPPLE OUT (AC COUPLED) 50mV/div 100mA/div. Figure 3—Steady-State Operation V =3.6V, 3 LEDs, 20mA IN MP3205 Rev. 1.3 10/8/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP3205 – 1.3 MHz FIXED FREQUENCY 5 WHITE LED DRIVER CMDSH LED1 IN SW LED2 4 EN MP3205 LED3 2 3 GND FB Figure 2— ...

Page 5

... LEDs will increase proportionally to the duty cycle of the PWM signal. The PWM MP3205 Rev. 1.3 10/8/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP3205 – 1.3 MHz FIXED FREQUENCY 5 WHITE LED DRIVER signal used in Figure 7 should be 1KHz or below due to the soft start function. R1 (Ω) 104 PWM 20 ...

Page 6

... 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. MP3205 Rev. 1.3 10/8/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP3205 – 1.3 MHz FIXED FREQUENCY 5 WHITE LED DRIVER CMDSH-3 LED1 5 1 ...

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