Lumissil IS32FL3749

IS32FL3749 is a matrix LED driver with 24 high voltage (16V) constant current channels. It supports from one to four power scan to become a 24×n (n=1~4) matrix LED driver. Each LED can be pulse width modulated (PWM) with maximum 16-bit precision for smooth LED brightness control. In addition, each LED can be controlled by an 8-bit output current control register (Dot correction, current scale, SL), which allows fine tuning the current for rich RGB color mixing, a pure white color LED application. It is targeted at the automove LCD backlight market that ulizes white mini-LED arrays for large ultra-high contrast Central Information Displays. 

Key features

• 4.3v-16v, Support 8/16/8+4/8+8-bit PWM mode, 8-bit Dot correction, 4 groups delay
• 8-bit × 3 global current adjustment, Channel to channel timing skew, Spread spectrum
• 1.0mA Quiescent current, 3.3μA shutdown current
• De-ghosting with reduced LED reverse bias

Additional features

• Support 24 constant current channels, 60mA/ch
• Tolerate up to 20V, nominal operation voltage between 4.5V to 16V, multiple LED’s can be connected in series
• Built-in LDO to generate 4.8V supply for internal logic (option to float it and use external power)
• Interface
  • VSB (video serial bus, 33MHz)
  • SPI (33MHz)
     
• Reset register reset all the registers to default
• Support 8-bit, 16-bit, 8+4-bit dithering and 8+8-bit dithering PWM mode
• Built-in Dot correction: 8-bit/dot
• 8-bit × 3 global current adjustment
• 4 groups delay to minimize the power ripple
• Channel to channel timing skew (one sys-clock skew to reduce transient noise)
• Support bi-directional data output via DI
• PSW short protection
• Spread spectrum
• Programmable detection of open/short, detected LED and store detected LED information in registers for ease of manufacturing/debugging
• Low standby and sleep mode current
  • For matrix scanning operation
  • Built-in de-ghosting circuit
     
• Reduced inactive LED reverse bias to improve LED reliability
• Over temperature protection
• Operating temperature: -40°C to 125°C
• AEC-Q100 qualification in progress
• eTQFP-48 (7mm × 7mm) package
• RoHS & Halogen-free compliance
• TSCA compliance

Applications

• Automotive LED back light
• Mini LED back light
• Automotive center console button backlight
• Automotive cluster display

Available tools

EVAL board: IS32FL3749-TQLA3-EB
More Information see Lumissil Datasheet