AL3644 Series

Dual 1.5A Current Source Camera Flash LED Driver

Catalog

Dual 1.5A Current Source Camera Flash LED Driver

Part	Supplied Contents	Utilized IC / Part	Current - Output / Channel	Outputs and Type	Outputs and Type	Features	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Type	Topology	Mounting Type	Voltage - Supply (Max) [Max]	Package / Case	Number of Outputs	Applications	Voltage - Supply (Min) [Min]	Dimming	Frequency	Internal Switch(s)
Diodes Inc AL3644EV1	Board(s)	AL3644	1.5 A	2	Non-Isolated	Dimmable
Diodes Inc AL3644TTCH12-7			1.5 A				U-WLB1713-12	85 °C	-40 °C	DC DC Regulator	Step-Up (Boost)	Surface Mount	5 V	12-UFBGA WLBGA	2	Camera Flash	2.5 V	I2C PWM	4 MHz

Catalog

Dual 1.5A Current Source Camera Flash LED Driver

Key Features

• Dual Independent 1.5A LED Current Source Programmability

• Accurate and Programmable LED Current Range from 1.4mA to 1.5A

• Torch Currents up to 360mA (AL3644TT)

• Flash Timeout Values up to 1.6 Seconds (AL3644TT)

• Optimized Flash LED Current During Low Battery Conditions (Input Voltage Flash Monitor)

• > 85% Efficiency in Torch Mode (at 100mA) and Flash Mode (at 1A to 1.5A)

• Grounded Cathode LED Operation for Improved Thermal Management

• Small Solution Size: < 2.36mm2

• Hardware Strobe Enable (STROBE)

• Synchronization Input for RF Power Amplifier Pulse Events (TX)

• Hardware Torch Enable (TORCH/TEMP)

• Remote NTC Monitoring (TORCH/TEMP)

• 400kHz I2C-Compatible Interface – AL3644 (I2C Address = 0x63)

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. "Green" Device (Note 3)

• For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), pleasecontact usor your local Diodes representative.https://www.diodes.com/quality/product-definitions/

Description

The AL3644 is a dual LED flash driver that provides a high level of adjustability within a small solution size. The AL3644 utilizes a 2MHz or 4MHz fixed frequency synchronous boost converter to provide power to the dual 1.5A constant current LED sources. The dual 128 level current sources provide the flexibility to adjust the current ratios between LED1 and LED2. An adaptive regulation method ensures the current sources remain in regulation and maximizes efficiency.