AS1121-BQFT austriamicrosystems, AS1121-BQFT Datasheet - Page 14

• Manufacturer Part Number: AS1121-BQFT
• Description: IC LED DRIVER 16-CH 30V 32-TQFN
• Manufacturer: austriamicrosystems

Specifications of AS1121-BQFT

• Constant Current: Yes
• Internal Driver: Yes
• Type - Primary: Backlight, General Purpose
• Type - Secondary: Color
• Mounting Type: *
• Topology: PWM
• Number Of Outputs: 16
• Voltage - Supply: 3.1 V ~ 3.6 V
• Voltage - Output: 1.5 V ~ 30 V
• Package / Case: *
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency: -
• Other names: AS1121-BQFTTR

AS1121
Datasheet - D e t a i l e d D e s c r i p t i o n
Serial Data Transfer Rate
Figure 11
Figure 11. Cascaded Configuration
The maximum number of cascading AS1121 devices depends on the application system and is in the range of 40 devices. The minimum fre-
quency needed can be calculated by the following equations:
Where:
f
f
Where:
f
f
n is the number of cascaded of AS1121 devices.
www.austriamicrosystems.com/LED-Driver-ICs
GSCLK
UPDATE
CLK
UPDATE
Controller
GSCLK
MODE
XERR
SOUT
is the minimum frequency needed for CLK and SIN;
OEN
CLK
100k
SIN
LD
is the minimum frequency needed for GSCLK;
is the update rate of whole cascaded system.
is the update rate of whole cascaded system;
shows a cascaded arrangement AS1121 devices connected to a controller, building a basic module of an LED display system.
Ω
V
CC
GSCLK
MODE
XERR
OEN
CLK
SDI
LD
OUT0
V
LED
AS1121
...
6
OUT15
f
CLK
f
GSCLK
V
LED
= 193 x f
= 4096 x f
Revision 1.00
100nF
SDO
VCC
VCC
GND
IREF
UPDATE
V
UPDATE
CC
...
x n
GSCLK
MODE
XERR
OEN
CLK
SDI
LD
OUT0
V
LED
AS1121
...
OUT15
V
LED
100nF
SDO
VCC
VCC
GND
IREF
(EQ 5)
(EQ 6)
V
CC
14 - 18