Datasheet AL58221 (Diodes) - 2

AL58221 Typical Applications Circuit
Vled VDD ... ... Chip 1 Chip N VSS
VDD OUTA3 VDD OUTA3 REXT_C OUTB3 REXT_C OUTB3 REXT_B OUTC3 REXT_B OUTC3 REXT_A REXT_A GND GND OUTC0 OUTC0
DCKI
DCKI DCKO DCKI DCKO
DIN
DI DO DI DO Pin Descriptions PIN NUMBER PIN NAME DESCRIPTION
External resistors connected between REXT and GND for individual output current 1, 2, 3 REXT_C, REXT_B, REXT_A value setting. 4, 7, 16,19 OUTC[0:3] 5, 8, 17, 20 OUTB[0:3] Constant current outputs 6, 9, 18, 21 OUTA[0:3] 10 GCKI External grayscale clock input for PWM/APDM operation. Clock input terminal for serial data transfer. Data is sampled at both rising edge and 11 DCKI falling edge of DCKI. 12 DCKO Clock output terminal for serial data transfer. 13 DI Serial data input terminal. 14 DO Serial data output terminal. Grayscale clock output 15 GCKO When command data “osc” = ‘L’, GCKO comes from internal osc When command data “osc” = ‘H’, GCKO comes from GCKI 22 NC No connect 23 VDD Supply voltage terminal. 24 GND Ground terminal
Equivalent Circuit of Inputs and Outputs 1. DI, DCKI terminals 2. DO, DCKO, GCKO terminals 3. GCKI terminal
VDD VDD VDD IN PUT OUTPUT INPUT GND GND GND AL58221 2 of 26 April 2024 Document number: DS46476 Rev. 2 - 2
www.diodes.com
© 2024 Copyright Diodes Incorporated. All Rights Reserved.