Purchase MP1521, In-stock MP1521 From SeekIC.
Package Cooled:06+ D/C:SOP
Part Number: MP1521
Package Cooled: 06+
D/C: SOP
Description: The MP1521 is a constant-current Boost Regulator. This IC has three individual current-sensing feedbac...
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MP1521
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Suppliers
DataSheet
General Description
MP1521 General Description
The MP1521 is a constant-current Boost Regulator. This IC has three individual current-sensing feedbacks, which are ideal for driving multiple strings of series connected LEDs. The OLS pin is designed for detecting loose or open LED connections.
The IC uses a peak current, constant minimum off-time architecture. The feedback pins measure voltage across sense resistors in series with the LED strings. When supplying a bias current of 20mA, the voltage drop across the sense resistor is only 0.4V to minimize power loss. Either a DC voltage or a PWM signal at the BRT/PWM input can control the LED brightness.
The MP1521 has an on board power MOSFET switch that is protected by current limit, open load shutdown, thermal shutdown, and undervoltage lockout.
MP1521 Maximum Ratings
Supply Voltage (VIN) ................28V
Switch Voltage to GND .......... -0.5V to 28V
VEN, VREF, VBRT, VFB1, VFB2, VFB3 ... ..0.3V to 6V
Storage Temperature....... .. -55 to +150
Switch Voltage to GND .......... -0.5V to 28V
VEN, VREF, VBRT, VFB1, VFB2, VFB3 ... ..0.3V to 6V
Storage Temperature....... .. -55 to +150
MP1521 Features
·On Board Power MOSFET
·Drive 9 White LEDs from 2.7V Input
·Drive 15 White LEDs from 5V Input
·Up to 90% Efficiency
·Over 80mA Output Current Capacity
·Open Load Shutdown
·Low Current Sensing Feedback Voltage
·Up to 3 String Current Sensing Feedback
·Analog and Digital PWM Brightness Control
·UVLO, Thermal Shutdown
·Soft Start
· Internal Current Limit
·Available in Compact MSOP10 and Tiny 3 mm x 3 mm QFN16 Package
·Evaluation Boards Available
MP1521 Typical Application
·Handheld Computers, Cell phones, PDAs, Digital and Video Cameras, Small LCD Displays
·Li Ion and NiMH Battery Applications
·Li Ion and NiMH Battery Applications
MP1521_r2.7w
PDF/DataSheet Download
- Datasheet: MP1521_r2.7w
- File Size: 176012 KB
- Manufacturer: ETC [ETC]
- Click here to Download
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MP1519
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MP1518
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