Datasheets
Application Notes
Other Technical Documents
Part Number(s)
(NSID) | Description | Availability | Current Reported Stock | Budgetary Pricing | Pack
Size |
|---|
LM27965SQEV
| Dual Display White LED Driver with I2C Compatible Brightness Control | Full production
|
| $121.00 each | 1 |
| Description
The LM27965 is a highly integrated charge-pump-based dual-display LED driver. The device can drive up to 9 LEDs in parallel with a total output current of 180mA. Regulated internal current sinks deliver excellent current and brightness matching in all LEDs.
The LED driver current sinks are split into three independently controlled groups. The primary group can be configured with 4 or 5 LEDs, for backlighting a larger main display. The second group can be configured with 2 or 3 LEDs, for backlighting a smaller secondary display. An additional, independently controlled LED driver is provided for driving an indicator or general purpose LED. The LM27965 has an I2 C compatible interface that allows the user to independently control the brightness on each bank of LEDs.
This device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2, or in Pass-Mode. The proper gain for maintaining current regulation is chosen based on LED forward voltage, so that efficiency is maximized over the input voltage range.
The LM27965 is available in National's small 24-pin Leadless Leadframe Package (LLP-24).
Features:
- 91% Peak LED Drive Efficiency
- No Inductor Required
- 0.3% Current Matching
- Drives LEDs with up to 30mA per LED
- 180mA of total drive current
- I2 C Compatible brightness Control Interface
- Adaptive 1x ? 3/2x Charge Pump
- Resistor-Programmable Current Settings
- Extended Chip RESET Pin
- Extended Li-Ion Input: 2.7V to 5.5V
- Small low profile industry standard leadless package,
- LLP 24: (4mm x 4mm x 0.8mm)
- 25mm2 total solution size
Applications:
- Mobile Phone Display Lighting
- PDA Backlighting
- General LED Lighting
|
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 LM27965.
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 LM27965 is located at RoHS Status.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM27965SQ | CMOS7 | 0 | 21301 | 0 | 0 | 1584000 | 3 | 449464325
|
|
LM27965SQ-M | CMOS7 | 0 | 21301 | 0 | 0 | 1584000 | 3 | 449464325
|
|
LM27965SQX | CMOS7 | 0 | 21301 | 0 | 0 | 1584000 | 3 | 449464325
|
|
LM27965SQX-M | 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 LM27965.
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 LM27965 is located at RoHS Status.
