This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Images are for reference only,

See Technical Specifications

LM3642TLE-LT/NOPB

LED Driver IC 1 Output DC DC Regulator Step-Up (Boost) I²C Dimming 1.5A (Flash) 9-DSBGA (1.6x1.6)

Manufacturer:

Texas Instruments
Mfr.Part #:

LM3642TLE-LT/NOPB
Datasheet:

LM3642TLE-LT/NOPB Datasheet (PDF)
Series:

LM3642
Mounting Style:

SMD/SMT
Number of Outputs:

1 Output
Output Current:

1.5 A

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

LM3642TLE-LT/NOPB General Description

The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.

The LM3642 is controlled via an I²C-compatible interface. Features include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse as well as a TX input which forces the flash pulse into a low-current Torch Mode, allowing for synchronization to RF power amplifier events or other high-current conditions.

The 4-MHz switching frequency, overvoltage protection and adjustable current limit settings allow the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device is available in a small 9-bump DSBGA package and operates over the −40°C to 85°C temperature range.

Key Features

1.5-A High-Side Current Source for Single LED
> 85% Efficiency in Torch Mode (at 100 mA) and
Flash Mode (at 1 A to 1.5 A)
Accurate Programmable Flash LED Current from
93 mA to 1.5 A
Accurate Programmable Torch LED Currents:
- 48.4 mA to 375 mA
- 24 mA to 187 mA (LT option)
Small Solution Size: < 20 mm²
Soft-Start Operation for Battery Protection
Hardware Strobe Enable
Synchronization Input for RF Power Amplifier
Pulse Events
V_IN Flash Monitor Optimization
400-kHz I²C-Compatible Interface
0.5-mm Pitch, 9-Bump DSBGA

Specifications

Product Category	LED Lighting Drivers	Series	LM3642
Mounting Style	SMD/SMT	Number of Outputs	1 Output
Output Current	1.5 A	Input Voltage, Min	2.5 V
Input Voltage, Max	5.5 V	Topology	Boost
Operating Frequency	4 MHz	Output Voltage	5 V
Minimum Operating Temperature	- 40 C	Maximum Operating Temperature	+ 85 C
Features	High Side Current Source, I2C Control, Soft Start	Input Voltage	2.5 V to 5.5 V
Number of Channels	1 Channel	Operating Supply Voltage	2.5 V to 5.5 V
Output Type	Current Mode	Product Type	LED Lighting Drivers
Factory Pack Quantity	250	Subcategory	Driver ICs
Supply Current - Max	750 uA	Type	Inductive
Unit Weight	0.000109 oz