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LED1642GW Datasheet, PDF (1/42 Pages) STMicroelectronics – 16 channel LED driver with error detection current gain control | |||
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LED1642GW
16 channel LED driver with error detection current gain control and
12/16-bit PWM brightness control
Datasheet - production data
QSOP-24
TSSOP24
TSSOP24
(exposed pad)
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
Applications
⢠Full color/monochrome large displays
⢠LED signage
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.
November 2015
This is information on a product in full production.
DocID024395 Rev 6
1/42
www.st.com
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