AS1112-BQFT austriamicrosystems, AS1112-BQFT Datasheet - Page 15

• Manufacturer Part Number: AS1112-BQFT
• Description: IC DRIVER LED 16-CHAN 32-TQFN
• Manufacturer: austriamicrosystems
• Type: Constant Currentr

Specifications of AS1112-BQFT

• Constant Current: Yes
• Topology: PWM
• Number Of Outputs: 16
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: Color
• Frequency: 30MHz
• Voltage - Supply: 3 V ~ 5.5 V
• Voltage - Output: 15V
• Mounting Type: Surface Mount
• Package / Case: 32-VQFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 69mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -

AS1112
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 15
Figure 15. Cascaded Configuration
The maximum number of cascading AS1112 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 AS1112 devices.
www.austriamicrosystems.com/LED-Driver-ICs/AS1112
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 AS1112 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
AS1112
...
6
OUT15
f
CLK
f
GSCLK
V
LED
= 193 x f
= 4096 x f
Revision 1.09
100nF
SDO
V
TEST
GND
I
REF
UPDATE
CC
V
UPDATE
CC
...
x n
GSCLK
MODE
XERR
OEN
CLK
SDI
LD
OUT0
V
LED
AS1112
...
OUT15
V
LED
100nF
SDO
V
TEST
GND
I
REF
CC
(EQ 5)
(EQ 6)
V
15 - 19
CC