Overview
The LED1642GWTTR is a monolithic, low voltage, low current power 16-bit shift register designed by STMicroelectronics for LED panel displays. This device is part of the LED1642GW series and is specifically packaged in a TSSOP24 format. It guarantees a 20 V output driving capability, allowing users to connect several LEDs in series. The LED1642GWTTR features sixteen regulated current sources that provide constant current from 3 mA to 40 mA to drive LEDs, with the current programmable through an external resistor and adjustable via a 7-bit current gain register in two subranges. The brightness of each channel can be adjusted separately through 12/16-bit grayscale control.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 16 |
| Output Current | 3 mA to 40 mA |
| Current Programming | Through external resistor and 7-bit current gain register |
| Grayscale Brightness Control | 12/16-bit PWM |
| Supply Voltage | 3 V to 5.5 V |
| Package Type | TSSOP24 |
| Thermal Shutdown | 170 °C |
| Clock Frequency | Up to 30 MHz |
| Output Driving Capability | 20 V |
Key Features
- 16 constant current output channels
- Output current: from 3 mA to 40 mA
- Current programmable through external resistor and 7-bit global current gain adjustment in two ranges
- 12/16-bit PWM grayscale brightness control
- Programmable output turn-on/off time
- Error detection mode (open and shorted-LED)
- Programmable shorted-LED detection thresholds
- Auto power saving/auto-wakeup features
- Selectable SDO synchronization on the CLK falling edge
- Gradual output delay (selectable)
- Thermal shutdown and overtemperature alert
Applications
The LED1642GWTTR is suitable for various applications, including full-color and monochrome large displays, LED signage, and other LED panel display systems. Its features make it ideal for high-brightness LED arrays and systems requiring precise current control and error detection.
Q & A
- What is the LED1642GWTTR used for?
The LED1642GWTTR is used for driving LED panel displays, providing constant current to LEDs and offering features like error detection and brightness control. - How many output channels does the LED1642GWTTR have?
The LED1642GWTTR has 16 constant current output channels. - What is the range of output current for the LED1642GWTTR?
The output current ranges from 3 mA to 40 mA. - How is the current programmed in the LED1642GWTTR?
The current is programmed through an external resistor and can be adjusted by a 7-bit current gain register in two subranges. - What is the supply voltage range for the LED1642GWTTR?
The supply voltage range is between 3 V and 5.5 V. - Does the LED1642GWTTR have thermal management features?
Yes, it includes thermal shutdown and overtemperature alert features. - What is the maximum clock frequency of the LED1642GWTTR?
The maximum clock frequency is up to 30 MHz. - Does the LED1642GWTTR support error detection?
Yes, it supports error detection for both open and shorted LEDs. - Can the brightness of each channel be adjusted separately?
Yes, the brightness can be adjusted separately for each channel through 12/16-bit grayscale control. - What package types are available for the LED1642GW series?
The LED1642GW series is available in QSOP24, QFN-24L, TSSOP24, and HTSSOP24 packages.
