The LP5891-Q1 is a highly integrated, common-cathode LED matrix driver with 48 constant current sources and 16 scanning FETs. The LP5891-Q1 implements a high speed rising-edge transmission interface to support high device count daisy-chained while minimizing electrical-magnetic interference (EMI) and internal GCLK rate ranges from 40 MHz to 160 MHz. The device also implements LED open/weak-short/short detections and removals during operations.
PART NUMBER | PACKAGE(1) | BODY SIZE (NOM) |
---|---|---|
LP5891-Q1 | VQFN (76) | 9.00 mm × 9.00 mm |
Changes from Revision * (August 2022) to Revision A (December 2022)
The LP5891-Q1 is a highly integrated common cathode matrix LED display driver with 48 constant current sources and 16 scanning FETs. Besides driving 16 × 16 and 32 × 32 RGB LED pixels as LP5890, three LP5891-Q1 devices are capable of driving 48 × 48 RGB LED pixels and stacking four LP5891-Q1 devices can drive 64 × 64 RGB LED pixels. To achieve low power consumption, the device supports separated power supplies for the red, green, and blue LEDs by its common cathode structure. Furthermore, the operation power of the LP5891-Q1 is significantly reduced by ultra-low operation voltage range (Vcc down to 2.5 V) and ultra-low operation current (Icc down to 3.6 mA).
The LP5891-Q1 implements a high speed rising-edge transmission interface to support high device count daisy-chained and high refresh rate while minimizing electrical-magnetic interference (EMI). The device supports up to 50-MHz SCLK (external) and up to 160-MHz GCLK (internal). Meanwhile, the device integrates enhanced circuits and intelligent algorithms to solve the various display challenges in Narrow Pixel Pitch (NPP) LED display applications and mini and micro-LED products: dim at the first scan line, upper and downside ghosting, non-uniformity in low grayscale, coupling, caterpillar caused by open or short LEDs, which make the LP5891-Q1 a perfect choice in such applications.
The LP5891-Q1 also implements LED open/weak short/short detections and removals during operations and can also report those information out to the accompanying digital processor.
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | RRF NO. | ||
IREF | 20 | I | Pin for setting the maximum constant-current value. Connecting an external resistor between IREF and GND sets the maximum current for each constant-current output channel. When this pin is connected directly to GND, all outputs are forced off. The external resistor must be placed close to the device. |
VCC | 8 | I | Device power supply |
VR | 9, 10 | I | Red LED power supply |
VG | 51, 50 | I | Green LED power supply |
VB | 49, 48 | I | Blue LED power supply |
R0-R15 | 1, 4, 11, 14, 17, 21, 24, 27, 32, 35, 38, 41, 44, 47, 54, 57 | O | Red LED constant-current output |
G0-G15 | 2, 5, 12, 15, 18, 22, 25, 28, 31, 34, 37, 40, 43, 46, 53, 56 | O | Green LED constant-current output |
B0-B15 | 3, 6, 13, 16, 19, 23, 26, 29, 30, 33, 36, 39, 42, 45, 52, 55 | O | Blue LED constant-current output |
LINE0-LINE15 | 76, 75, 74, 73, 72, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62, 61 | O | Scan lines |
SCLK | 60 | I | Clock-signal input pin |
SIN | 59 | I | Serial-data input pin |
SOUT | 58 | O | Serial data output pin |
GND | 7 | — | Power-ground reference |
Thermal pad | — | — | The thermal pad and the GND pin must be connected together on the board. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Voltage | VCC | –0.3 | 6 | V |
VR/G/B | –0.3 | 6 | V | |
IREF, SCLK, SIN, SOUT | –0.3 | 6 | V | |
RX/GX/BX | –0.3 | 6 | V | |
LINE0 to LINE15 | –0.3 | 6 | V | |
Operating junction temperature, TJ | –40 | 150 | °C | |
Storage temperature, Tstg | –55 | 150 | °C |