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Product Detailed Parameters
- Description：IC LED DRVR LIN PWM 40MA 24TSSOP
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Shift Register
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：19V
- Current - Output / Channel：40mA
- Frequency：30MHz
- Dimming：PWM
- Applications：Signage
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：24-TSSOP
- Grade：-
- Qualification：-
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Overview
The LED1642GWTTR is a monolithic, low-voltage, low-current power 16-bit shift register designed for LED panel displays. It features sixteen regulated current sources providing 3 mA to 40 mA constant current with a 20 V output driving capability. The device supports 12/16-bit PWM grayscale brightness control and includes error detection modes for open and shorted LEDs. It operates on a 3 V to 5.5 V supply voltage range with a clock frequency up to 30 MHz.
Feature Summary
- Provides sixteen constant current output channels with programmable current gain adjustment via an external resistor and internal registers.
- Integrates 12/16-bit PWM grayscale brightness control for each channel along with programmable output turn-on/off times to reduce noise.
- Includes diagnostic capabilities such as open/short LED error detection, auto power-shutdown, and thermal shutdown protection.
Applications
- LED panel displays
- Backlighting systems
Procurement Notes
Verify the specific package variant against the datasheet, as suffixes indicate different packaging or temperature grades. Confirm that the automotive-grade ALED1642GWXTTR is not required if your design demands AEC-Q100 compliance. Ensure the industrial grade matches your environmental operating requirements before finalizing the order.
Selection Notes
Select this component when designing LED matrix displays requiring high-speed data transmission and individual channel dimming. The 30 MHz interface supports rapid updates, while the integrated error detection simplifies system reliability. Consider the 24-TSSOP-EP package for thermal management in dense layouts.
Part Context
This part belongs to the LED1642 family of 16-channel LED drivers from STMicroelectronics. It shares core functionalities with variants like the LED1642GWPTR but differs in packaging and potentially qualification standards. The family is positioned for industrial and general-purpose lighting applications requiring robust current regulation.
Replacement Considerations
The ALED1642GWXTTR is a verified automotive-grade substitute within the same functional family. Other variants in the LED1642 series may serve as alternatives depending on specific packaging or temperature range requirements.
