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AW3648CSR

High Efficiency, 1.5A Flash LED Driver

The AW3648 is a LED flash driver that provides a high level of adjustability within a small solution size. The AW3648 utilizes a 2MHz or 4MHz fixed-frequency synchronous boost converter to provide power to the 1.5A constant current LED sources. The 64 levels current source provides the flexibility to adjust the current of LED in Flash/Torch/IR modes. The AW3648 provides three IVFM protection modes to prevent system reset or shutdown under low battery condition. The AW3648 is controlled via an I 2 C-compatible interface. The main features of the AW3648 include: flash/torch current, flash timeout duration, IVFM, TX interrupt, and NTC thermistor monitor. The AW3648 also provides hardware flash and hardware torch pins (STROBE and TORCH/TEMP) to control Flash/Torch events. The 2MHz or 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.

Characteristic

l  1.5A Accurate and Programmable LED Current Source

n  Flash23.4mA~1.5A64 levels 23.44mA/level

n  Torch5.4mA~376mA64 levels 5.89mA/level

n  Flash Timeout40ms~1.6s16 levels

n  Flash/Torch/IR Mode

l  High Efficiency: 85%

l  Optimized Flash LED Current During Low Battery Conditions (IVFM)

l  Hardware Strobe Enable (STROBE)

l  Hardware Torch Enable (TORCH/TEMP)

l  Remote NTC Monitoring

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

l  400kHz I2CAW3648I2C Address=0x63

l  0.4mm Pitch, CSP-12 Package


Datasheet

Application note

Title Type Size Date Download
DS_AW3648_EN_V1.4_High Efficiency, 1.5A Flash LED Driver.pdf PDF 2.76M 2019-01-11
  • LED Channel
    Control Interface
    Flash Current (Max) (A)
    Torch Current (Max) (A)
    Flash Current Accuracy (%)
    Flash Timer (s)
    Indicator mode
    Type
    Package (mm)
  • AW3648CSR

    1
    I2C
    1.5
    0.376
    ±7
    0.04-1.6
    -
    Boost
    WLCSP 1.626X1.332-12B
  • AW3642CSR

    1
    I2C
    1.5
    0.376
    ±7
    0.04-1.6
    -
    Boost
    WLCSP 1.63X1.33-9B
  • AW36428FCR

    1
    I2C
    1.5
    0.375
    ±10
    0.04-1.6
    -
    Inductorless
    FCQFN 1.6X1.2-10L
  • AW36528FCR

    1
    I2C
    1.5
    0.375
    ±10
    0.04-1.6
    Inductorless
    FCQFN 1.6X1.2-10L
Package form Number of pins Long(mm) Width(mm) Thick(mm) Pin spacing(mm) Heat sink Package drawing
WLCSP 1.626×1.332×0.575-12B 12 1.626 1.332 0.575 0.4 N
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