LM3639AYFQT Texas Instruments - Yeehing Electronics

LM3639A Single chip 40V backlight + 1.5A flash LED driver

Pricing (USD)

Quantity	Unit Price
1 — 99	1.342
100 — 249	1.108
250 — 999	0.796
1,000 +	0.42

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	LED Lighting Drivers
RoHS	Y
Input Voltage	2.5 V to 5.5 V
Operating Frequency	500 kHz
Supply Current - Max	2 mA
Minimum Operating Temperature	- 40 C
Maximum Operating Temperature	+ 85 C
Mounting Style	SMD/SMT
Package / Case	DSBGA-20
Series	LM3639A
Packaging	Reel
Features	Adjustable Switch Frequency, CABC, Enable/Shutdown, I2C Control, PWM Control
Operating Temperature Range	- 40 C to + 85 C
Brand	Texas Instruments
Product Type	LED Lighting Drivers
Factory Pack Quantity	250
Subcategory	Driver ICs

For more information, please refer to datasheet

Documents

LM3639AYFQT Datasheet

More Information

The LM3639A is a single-chip white LED Camera Flash Driver + LCD Display Backlight Driver. The low-voltage, high-current flash LED driver is a synchronous boost which provides the power for a single flash LED at up to 1.5A or dual LEDs at up to 750 mA each. The high-voltage backlight driver is a dual-output asynchronous boost which powers dual LED strings at up to 40V and 30 mA per string. An adaptive regulation method in both boost converters regulates the headroom voltage across the respective source/sink to ensure the LED current remains in regulation while maximizing efficiency. The LM3639A's flash driver is a 2MHz or 4MHz fixed-frequency synchronous boost converter plus 1.5A 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 1.5A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.