EV0043 MPS | Alldatasheet
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EV0043 (MP1517) 3A, 25V, 1.1MHz Step-Up Converter for WLED Applications EVALUATION BOARD EV0043 (MP1517) Rev. 1.1 www.MonolithicPower.com 1 2/17/2005 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. The Future of Analog IC Technology
DESCRIPTION
The EV1517 is the evaluation board used to demonstrate the white LED driver capabilities of the MP1517. The low 0.7V feedback voltage offers higher efficiency in white LED driver applications including cell phone camera flash. Soft-start, cycle-by-cycle current limiting and input under voltage lockout prevent overstressing or damage to sensitive external circuitry at startup and output short-circuit conditions. Current-mode regulation and external compensation components allow the MP1517 control loop to be optimized over a wide variety of input voltages, output voltages and load current conditions. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input Voltage (1) V IN 2.6 to 5.5 V LED Current (Torch) I OUT1 20 mA LED Current (Flash) I OUT2 150 mA Note: 1) 5.5V input voltage limit is specific to the application circuit on this evaluation board. The input voltage limit of the MP1517 is 25V.
FEATURES
- 4A Peak Current Limit
- Low 700mV Feedback Threshold
- Internal 150m Ω Power Switch
- Input Range of 2.6V to 25V
- 95% Efficiency
- Zero Current Shutdown Mode
- Under Voltage Lockout Protection
- Open Load Protection
- Soft-Start Operation
- Thermal Shutdown
- Tiny QFN16 (4mm x 4mm) Package
APPLICATIONS
- Boost and SEPIC Regulators
- Handheld Computers
- Cell Phone Camera Flash, PDAs
- Digital Still and Video Cameras “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV0043 EVALUATION BOARD Dimensions (2.5”X x 2.0”Y x 0.4”Z) Board Number MPS IC Number EV0043 MP1517DR VGATE 2V/div. VOUT 10V/div. 20ms/div. EV0043_TPC01 Waveform in Flash Mode
EV0043 (MP1517) – 3A, 25V, 1.1MHz STEP-UP CONVERTER FOR WLED APPLICATIONS EVALUATION BOARD EV0043 (MP1517) Rev. 1.1 www.MonolithicPower.com 2 2/17/2005 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC NMOS ZXMN6A08E6TA LED4 LED3 LED2 LED1 MP1517 EN BP NC COMP SW SW PGND PGND SGND NC SS FB IN OLS NC SGND OPEN OPEN MBR0540 GATE SS IN OUT 47nF GND EN EV0043_S01 EV0043 BILL OF MATERIALS Qty Ref Value Description Package M anufacturer P/N Distributor P/N 1 C1 4.7uF Capacitor, 25V, Ceramic X5R 1210 Panasonic ECJ-4YB1E475K Digikey PCC2251CT-ND
2 C2, C4 NS Do Not Stuff
1 C3 10uF Capacitor, 6.3V Ceramic X5R 1210 Taiyo-Yuden JMK325BJ106MF
1 C7 47nF Capacitor, 25V,
Ceramic X7R 0603 Panasonic ECJ-1VB1E473K Digikey PCC1771CT-ND
1 D1 Schottky Diode,
0.5A, 40V SOD123 ON Semi MBR0540T1 Digikey MBR0540T1OSCT-ND 1 L1 4.7uH Inductor, 5.6A Sumida CDRH8D43-4R7NC
4 LED1, LED2,
LED3, LED4 White LED, 40MCD 1206 Lumex SML-LX23UWC-TR Digikey 67-1607-1-ND
1 Q1 N-Channel MOSFET SOT23-6 Zetex
1 R1 2.2k Ω Film Resistor, 5% 0603 Panasonic ERJ-3GEYJ222V Digikey P2.2KGCT-ND
2 R2, R3 0 Film Resistor, 5% 0603 Yageo
311-0.0GCT-ND 1 R4 34.8 Ω Film Resistor, 1% 0805 Panasonic ERJ-6ENF34R8V Digikey P34.8CCT-ND 1 R5 5.11 Ω Film Resistor, 1% 0805 Yageo 9C08052A5R11FGHFT Digikey 311-5.11CCT-ND