Datasheets
Application Notes
Other Technical Documents
Part Number(s)
(NSID) | Description | Availability | Current Reported Stock | Budgetary Pricing | Pack
Size |
|---|
LP5521TMEV
| LP5521 Evaluation Kit | Full production
|
| $105.00 each | 1 |
| Description:
The LP5521 is a three channel LED driver designed to produce a variety of lighting effects for mobile devices. A high efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device has a program memory for creating variety of lighting sequences. When program memory has been loaded, the LP5521 can operate independently without processor control
The LP5521 Evaluation Kit is based on a computer controlled system, where the actual LP5521 devices are controlled and powered through the USB interface. Also, external power can be used if wanted. Two different sets of LEDs can be selected, either white LEDs or RGB LEDs. Four LP5521 Devices are assembled on one board to be able to evaluate the triggering/sequencing of multiple devices in one application.
Features:
- Adaptive charge pump with 1x and 1.5x gain provides up to 95% LED drive efficiency
- Charge pump with soft start and overcurrent/short circuit protection
- Low input ripple and EMI
- Very small solution size, no inductor or resistors required
- 200 nA typical shutdown current
- Automatic power save mode
- I2C compatible interface
- Independently programmable constant current outputs with 8-bit current setting and 8-bit PWM control
- Typical LED output saturation voltage 50 mV and current matching 1%
- Three program execution engines with flexible instruction set
- Autonomous operation without external control
- Large SRAM program memory
- Two general purpose digital outputs
- microSMD-20 package, 0.4 mm pitch
- Bumped LLP-24 package, 0.5 mm pitch
Applications:
- Fun / indicator lights
- LCD sub-display backlighting
- Keypad RGB backlighting and phone cosmetics
- Vibra, speakers, waveform generator
- Input to the LI-LO configuration, can be post regulated when supply is regulated by Buck2
- Up to 1000 mA output current by selection of external FET
Contents:
- LP5521 evaluation board
- USB interface cable
- CD-ROM including:
- Evaluation software
- Command compiler software
- Demo sequences
- LP5521 datasheet
- LP5521 power saving application note
- LP5521 programming application note
- Evaluation kit document (AN-1632)
- MicroSMD-20 PCB layout guidelines
|
National Semiconductor follows the provisions of the Product Stewardship Guide for Customers
(
CSP-9-111C1)
and Banned Substances and Materials of Interest Specification
(
CSP-9-111S2)
for regulatory environmental compliance. Details may be found at:
www.national.com/en/packaging/greennopb.html.
Lead free products are RoHS compliant.
Lead Free product status is available through the search tool located
here
All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.
Moisture Sensitivity Level Data for LP5521.
A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.
National's certificate of product compliance for LP5521 is located at RoHS Status.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LP5521TM | CMOS7 | 0 | 21301 | 0 | 0 | 1584000 | 3 | 449464325
|
|
LP5521TMX | CMOS7 | 0 | 21301 | 0 | 0 | 1584000 | 3 | 449464325
|
|
LP5521YQ | CMOS7 | 0 | 21301 | 0 | 0 | 1584000 | 3 | 449464325
|
|
LP5521YQX | CMOS7 | 0 | 21301 | 0 | 0 | 1584000 | 3 | 449464325
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click
here.
All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.
Moisture Sensitivity Level Data for LP5521.
A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.
National's certificate of product compliance for LP5521 is located at RoHS Status.
