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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) Exposed Pad
- Supplier Device Package：24-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LED1642GWXTTR is a monolithic, low-voltage, low-current power 16-bit shift register designed for LED panel displays. It features sixteen regulated current sources providing constant current from 3 mA to 40 mA per channel. The device guarantees a 20 V output driving capability, allowing multiple LEDs to be connected in series. It supports 12/16-bit PWM grayscale brightness control and includes error detection modes for open and shorted LEDs. The supply voltage range is 3 V to 5.5 V, with an operating temperature range of -40°C to +85°C or +125°C depending on the specific grade.
Feature Summary
- Provides sixteen constant current output channels with programmable current gain adjustment via external resistor and internal registers.
- Integrates 12/16-bit PWM grayscale brightness control for separate channel brightness adjustment.
- Includes open and shorted-LED error detection modes with programmable thresholds for system reliability.
- Features thermal management with overtemperature data alert and output thermal shutdown capabilities.
Applications
- LED panel displays
- Backlight applications
- High data rate transmission systems
Procurement Notes
Verify the specific suffix (e.g., XTTR) against the manufacturer's official datasheet to confirm package type, tape/reel specifications, and environmental compliance status such as RoHS. Ensure the selected variant matches the required operating temperature range and automotive or industrial grade requirements for the target application design.
Selection Notes
Select this component when designing LED panels requiring precise constant current regulation across sixteen channels. Consider the 30 MHz clock frequency for high-speed data transmission needs. Evaluate the need for daisy-chain configurations utilizing the selectable SDO synchronization feature. Confirm that the 3 V to 5.5 V supply voltage aligns with the system power architecture.
Part Context
This part belongs to the LED1642GW family of LED array drivers manufactured by STMicroelectronics. These devices are specialized integrated circuits intended for driving LED matrices in display applications. The family offers various packaging options and grades to suit different industrial and consumer electronics requirements.
Replacement Considerations
Check for other variants within the LED1642GW family, such as LED1642GWPTR, which may offer different packaging or temperature grades. Verify pin compatibility and electrical specifications before substituting any alternative components.
FAQ
How is the output current programmed?
The output current is programmed through an external resistor and can be adjusted using a 7-bit current gain register in two subranges.
What protection features are included?
The device includes open and shorted-LED error detection modes, auto power-shutdown/auto power-on features, and thermal management with overtemperature alert and output thermal shutdown.
