Product overview
Description
The LED1642GW is a monolithic, low voltage, low current power 16-bit shift register designed for LED panel displays. The LED1642GW guarantees 20 V output driving capability allowing the user to connect several LEDs in series. In the output stage, sixteen regulated current sources provide from 3 mA to 40 mA constant current to drive the LEDs. The current is programmed through an external resistor and can be adjusted by a 7-bit current gain register in two subranges. The brightness can be adjusted separately for each channel through 12/16-bit grayscale control.
Programmable turn-on and turn-off time (four different values available) improves the low noise generation performance of the system.
Open/short error detection mode is available in the LED1642GW. The auto power-shutdown and auto power-on features (selectable) allow the device to save power without external intervention.
Thermal management includes an overtemperature data alert and output thermal shutdown (170 °C). The high clock frequency is up to 30 MHz and it makes the device suitable for high data rate transmission. A selectable gradual output delay reduces the inrush current, whereas the selectable SDO synchronization feature works when the device is used in daisy-chain configuration. The supply voltage range is between 3 V and 5.5 V.
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All features
- 16 constant current output channels
- Output current: from 3 mA to 40 mA
- Current programmable through external resistor
- 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 (both open and shorted-LED)
- Programmable shorted-LED detection thresholds
- Auto power saving/auto-wakeup
- Selectable SDO synchronization on the CLK falling edge
- Gradual output delay (selectable)
- Supply voltage: 3 V to 5.5 V
- Thermal shutdown and overtemperature alert
- 30 MHz 4-wires interface
- 20 V current generator rated voltage
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All tools & software
All resources
| Resource title | Version | Latest update |
|---|
Product Specifications (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 6.0 | 04 Jan 2016 | 04 Jan 2016 |
Application Notes (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 2.0 | 13 Sep 2018 | 13 Sep 2018 |
Flyers (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 31 Aug 2023 | 31 Aug 2023 |
EDA Symbols, Footprints and 3D Models
STMicroelectronics - LED1642GW
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3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LED1642GWPTR | Active | QSOP24 | Industrial | Ecopack2 | |
| LED1642GWQTR | Active | QFN-24L | Industrial | Ecopack2 | |
| LED1642GWTTR | Active | TSSOP 24 | Industrial | Ecopack2 | |
| LED1642GWXTTR | Active | HTSSOP24 | Industrial | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||
| LED1642GWTTR | Active | 0.8407 / 1k | 3 distributors | TSSOP 24 | Tape and Reel | PHILIPPINES | EAR99 | NEC | -40 | 125 | ||||
| LED1642GWXTTR | Active | 0.896 / 1k | 6 distributors | HTSSOP24 | Tape and Reel | PHILIPPINES | EAR99 | NEC | -40 | 125 | ||||
| LED1642GWPTR | Active | 0.8407 / 1k | 2 distributors | QSOP24 | Tape and Reel | CHINA | EAR99 | NEC | -40 | 125 | ||||
| LED1642GWQTR | Active | 0.876 / 1k | 4 distributors | QFN-24L | Tape and Reel | CHINA | EAR99 | NEC | -40 | 125 | ||||
LED1642GWTTR Active
LED1642GWXTTR Active
LED1642GWPTR Active
LED1642GWQTR Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors