| Channel |
2 |
| Control Interface |
IIC |
| Current (Max) (A) |
1.5 |
| Torch Current (Max) (A) |
0.372 |
| Flash Current Accuracy (%) |
7 |
| Flash Timer (Min) (s) |
0.04 |
| Flash Timer (Max) (s) |
1.6 |
| IO Level (V) |
1.8 |
| Temperature |
-40℃~85℃ |
| Indicator mode |
NO |
| Package (mm) |
WLCSP 1.626X1.332-12B |
•Support Dual Color Temperature Flash LED Application
•Dual Independent and Programmable 1.5A LED Current Source
➢Flash：11.35mA~1.5A，128 levels 11.72mA/level
➢Torch：2.55mA~372mA，128 levels 2.91mA/level
➢Flash Timeout：40ms~1.6s，16 levels
➢Flash/Torch/IR Mode
•High Efficiency: 85%
•Optimized Flash LED Current During Low Battery Conditions (IVFM)
•Hardware Strobe Enable (STROBE)
•Hardware Torch Enable (TORCH/TEMP)
•Remote NTC Monitoring
•Synchronization Input for RF Power Amplifier Pulse Events (TX)
•400kHz I2C：AW3644（I2C Address=0x63）
•0.4mm Pitch，CSP-12 Package Compatible with AW3643, AW36413, AW36414
The AW3644 is a dual LED flash driver that provides a high level of adjustability within a small solution size. The AW3644 utilizes a 2MHz in 4MHz fixed-frequency synchronous boost converter to provide power to the dual 1.5A constant current LED sources. The dual 128 levels current sources provide the flexibility to adjust the current of LED1 and LED2 in Flash/Torch/IR modes. The AW3644 provides three IVFM protection modes to prevent system reset in shutdown under low battery condition.
The AW3644 are controlled via an I2C - compatible interface. The main features of the AW3644 include: flash/torch current, flash timeout duration, IVFM, TX interrupt, and NTC thermistor monitor. The AW3644 also provides hardware flash and hardware torch pins (STROBE and TORCH/TEMP) to control Flash/Torch events.
The 2MHz in 4MHz switching frequency options, overvoltage protection (OVP), and adjustable current limit allow for the use of tiny, low-profile inductors and 10-µF ceramic capacitors. The device operates over a –40°C to +85°C ambient temperature range.
The AW3644 is available in small 0.4mm pitch 1.626mm×1.332mm CSP-12 package.
