MP1541DJ-LF [MPS]
Switching Regulator, Current-mode, 1.9A, 1600kHz Switching Freq-Max, PDSO5, ROHS COMPLIANT, MO-193, TSOT-23, 5 PIN;
| 型号： | MP1541DJ-LF |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Switching Regulator, Current-mode, 1.9A, 1600kHz Switching Freq-Max, PDSO5, ROHS COMPLIANT, MO-193, TSOT-23, 5 PIN 驱动器 闪光灯 |
| 文件： | 总4页 (文件大小：152K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EV0062 (MP1541)
1.3MHz Low Power
LED Torch/Flash Driver
Monolithic Power Systems
EVALUATION BOARD - INITIAL RELEASE
GENERAL DESCRIPTION
FEATURES
The EV0062 is an evaluation board designed to
drive up to four (4) white LEDs in series. The
board is based on MPS’ MP1541 SOT23
current mode step up converter. The MP1541 is
intended for small, low power applications. The
MP1541 switches at 1.3MHz and allows the use
of tiny, low cost capacitors and inductors 2mm
or less in height. Internal soft start results in
small inrush current and extends the battery
life. The MP1541 operates from an input voltage
as low as 2.5V and can generate 12V at up to
200mA from a 5V supply.
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•
•
•
•
•
On Board Power MOSFET
Uses Tiny Capacitors and Inductors
1.3MHz Fixed Switching Frequency
Internally Compensated
Internal Soft Start
Operates with Input Voltage as Low as 2.5V
and Output Voltage as High as 22V
12V at 200mA from 5V Input
UVLO, Thermal Shutdown
Internal Current Limit
Available in a TSOT23-5 Package
•
•
•
•
APPLICATIONS
The MP1541 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload. The MP1541 is available in a small
5-lead TSOT23 package.
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•
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Camera Phone Flash
Handheld Computers and PDAs
Digital Still and Video Cameras
External Modems
Small LCD Displays
White LED Driver
ELECTRICAL SPECIFICATION
Parameter
Symbol Value Units
, “MPS”, “Monolithic Power Systems”, and “The Future of Analog IC
Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
Supply Voltage
VIN
IOUT
IOUT
2.5 – 6
20
V
LED Current (Torch)
LED Current (Flash)
1
mA
mA
2
100
EV0062 EVALUATION BOARD
Waveform in Flash Mode
V
FLASH
2V/Div.
0
0
V
OUT
5V/Div.
(2.5”X x 2.5”Y x 0.8”Z)
V
= 3.6V (3 LEDs)
IN
Board Number
MPS IC Number
MP1541
EV0062_MP1541_TAC_EC01
EV0062 Rev. B
06/04, Rev. 1.0
www.MonolithicPower.com
1
EV0062 (MP1541) 1.3MHz LOW POWER TORCH/FLASH LED DRIVER
EVALUATION BOARD - INITIAL RELEASE
EVALUATION BOARD SCHEMATIC
D1
MBR0520L
V
IN
V
OUT
5V
LED1
LED2
LED3
LED4
GND
GND
5
1
IN
EN
SW
4
2
3
FB
EN
MP1541
GND
Q1
FLASH
EV0062_MP1541_SCH01
EV0062 BILL OF MATERIALS
Distributor P/N (1)
Qty Ref Description
Package
Manufacturer P/N
1
C1 Ceramic Capacitor, 10uF,
10V, X5R
1210
Panasonic: ECJ-4YB1A106K
PCC2170CT-ND
1
C2 Ceramic Capacitor, 1uF,
16V, X5R
1206
Panasonic: ECJ-3YB1C105K PCC1882CT-ND
1
1
D1 Schottky Diode, 0.5A, 20V
L1 Inductor, 10uH, 1.7A
SOD-123
Fairchild: MBR0520L
MBR0520LCT-ND
ZXMN6A08E6CT-ND
P100KCCT-ND
Sumida: CDRH6D28-100NC
Zetex: ZXMN6A08E6TA
MPS: MP1541
1
Q1 N-Channel Mosfet, 60V, 3A SOT23-6
1
U1 1.3MHz Boost Converter
R1 Resistor, 100kΩ, 5%
R2 Resistor, 470kΩ, 5%
R3 Resistor, 61.9Ω, 1%
R4 Resistor, 15.4Ω, 1%
SOT23-5
0603
1
Panasonic: ERJ-6ENF1003V
1
0603
Panasonic: ERJ-6GEYJ474V P470KACT-ND
Panasonic: ERJ-6ENF61R9V P61.9CCT-ND
Panasonic: ERJ-6ENF15R4V P15.4CCT-ND
1
0603
1
0603
Flash LED (2)
1
LED1
Flash LED (2)
LED2
1
Flash LED (2)
1
LED3
Flash LED (2)
LED4
1
Note
1) Distributor: Digikey
2) Not included with board.
06/04, Rev. 1.0
www.MonolithicPower.com
2
EV0062 (MP1541) 1.3MHz LOW POWER TORCH/FLASH LED DRIVER
EVALUATION BOARD - INITIAL RELEASE
PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Silk Layer
Figure 2—Top Layer
Figure 3— Bottom Layer
06/04, Rev. 1.0
www.MonolithicPower.com
3
EV0062 (MP1541) 1.3MHz LOW POWER TORCH/FLASH LED DRIVER
EVALUATION BOARD - INITIAL RELEASE
QUICK START GUIDE
1. Connect LEDs to LED1 – LED4 terminals.
2. Preset Power Supply to 2.5V – 6V.
3. Turn Off Power Supply.
4. Connect Power Supply terminals to:
a. Positive (+): VIN
b. Negative (–): GND
5. Turn Power Supply On after making connections.
6. The MP1541 is automatically enabled on the demo board once VIN is applied.
7. Drive FLASH of Q1 with a pulsed signal (3V or above for High, 0V for Low) to switch between
two (2) LED currents.
8. IOUT1 is set to 20mA on the board.
9. IOUT2 is set to 100mA on the board.
NOTICE: MPS believes the information in this document to be accurate and reliable. However, it is subject to change without
notice. Contact MPS for current specifications. MPS encourages users of its products to ensure that third party Intellectual
Property rights are not infringed upon when integrating MPS products into any application. MPS cannot assume any legal
responsibility for any said applications.
EV0062 (MP1541) Rev. 1.0
6/10/04
© 2004 MPS, Inc.
Monolithic Power Systems, Inc.
983 University Avenue, Building A, Los Gatos, CA 95032 USA
Tel: 408-357-6600 ♦ Fax: 408-357-6601 ♦ www.MonolithicPower.com
4
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