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MP1521E
MP1521E - Brand New Monolithic Power Systems IC Chips
Credit Card - One-month free return and one year warranty.
- Full or Partial Refund, if the item is not as described
- Full Refund if you don't receive your order
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 under voltage lockout.
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
Applications
■ Handheld Computers, Cell phones, PDAs, Digital and Video Cameras, Small LCD
Displays
■ Li Ion and NiMH Battery Applications
Shipping
| First item | Additional item | Service | Description |
|---|---|---|---|
| $0.00 | Free | Free Shipping | Estimated 15-30 business days via Registered Air Mail or others |
| $27.50 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
| $0.00 | Free | Buyer cooperating carrier | Using buyer's cooperating carrier. Buyer should create a shipping label and share it to us. And then we will call carrier for pickup |
| $38.00 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
Delivery
- The transportation time may be delayed due to customs clearance, local holidays or abnormal events.
- The estimated time is based on the fastest speed provided by commercial couriers (DHL, FedEx, UPS etc).
- The estimated time does not include the lead time of the item. The lead time of most items is 2–5 business days. If more than 5 working days are needed, we will manually confirm with you.
| Flag | Country | Express Delivery | Standard Delivery |
|---|---|---|---|
 | United States | 3 - 5 days | 10-15 days |
 | Canada | 3 - 5 days | 10-20 days |
 | Mexico | 3 - 5 days | 10-17 days |
 | Germany | 3 - 5 days | 10-12 days |
 | Italy | 3 - 5 days | 10-15 days |
 | United Kingdom | 3 - 5 days | 10-12 days |
Estimated Delivery
This item requires 2-5 business days for processing before shipping after payment is confirmed. And depending on the destination and shipping method.
Return Policy
| Return window | Refund type | Return shipping |
|---|---|---|
| 60 days after receiving item | Money Back or Replacement | Buyer pays for return shipping |
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