Part Number(s)
(NSID) | Top View | Availability | Current Reported Stock | Budgetary Pricing | Pack
Size |
|---|
LM3553SD/NOPB
RoHS Status |
LLP | Full production
Lead Time: 6 weeks
 |
| $1.00 each at 1K+ pcs | reel
of
1000
 |
LM3553SDX/NOPB
RoHS Status |
LLP | Full production
Lead Time: 6 weeks
|
| $1.00 each at 1K+ pcs | reel
of
4500
|
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 LM3553.
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 LM3553 is located at RoHS Status.
Part Number(s)
(NSID) | Description | Availability | Current Reported Stock | Budgetary Pricing | Pack
Size |
|---|
LM3553SDEV
| 1.2A Dual Flash LED Driver System with I2C Compatible Interface | Full production
|
| $123.00 each | 1 |
 Description:
The LM3553 is a fixed frequency, current mode step-up DC/DC converter with two regulated current sinks. The device is capable of driving loads up to 1.2A from a single-cell Li-Ion battery.
One or more high current flash LEDs can be driven in series either in a high power Flash mode or a lower power Torch mode controlled by either an internal register or the FEN pin. Additionally a low current (20mA) indicator mode and a fixed output voltage mode are also available.
The LM3553 has 128 current levels and 176 flash safety timer durations that are user adjustable via an I2 C compatible interface. Internal soft-start eliminates large inrush currents at start-up. Over-voltage protection circuitry and 1.2MHz switching frequency allow for the use of small, low-cost output capacitors with lower voltage ratings.
The LM3553 is an asynchronous step-up DC/DC converter with an I2C compatible control interface designed for white LED Flash applications. The evaluation board is setup to drive two white flash LEDs with a series flash current of 500mA. Flash duration and current can both be configured by adjusting values stored in the internal control registers. The LM3553 is available in a 3 mm by 3mm LLP package.
Features:
- Accurate and Programmable LED Current up to 1.2A in 128 Steps
- Total solution Size <30mm2
- 90% Peak Efficiency
- Drives 2 LEDs in Series with 1.2A from 5V input
- Drives 2 LEDs in Series with 600mA from 3.0V Input
- Drives 1 LED with 1.2A from 3.0V Input
- Adjustable Over-Voltage Protection Allows for Single or Series LED Operation
- Four Operating Modes: Torch, Flash, Indicator, and Voltage Mode (4.98V)
- Programmable Flash Pulse Safety Timer in 16 Steps
- TX Input Ensures Synchronization with RF Power Amplifier Pulse or Prevents LED from Overheating
- LED Disconnect During Shutdown
- Flash/Imager Synchronization via FEN Pin
- Active Low Hardware Reset
- Multi-Function Pin (RESET and GPIO)
- Low Profile 12-pin LLP Package (SDF12A: 3mm x 3mm x 0.8mm, 0.4mm pitch)
Applications:
- Camera Phone LED Flash
- Smartphone and PDA Flash
- LED Backlight
|
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 LM3553.
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 LM3553 is located at RoHS Status.
