AAT2400 Datasheet, PDF (3/32 Pages) Skyworks Solutions Inc. – Sixteen-Channel White LED Driver Solution

DATA SHEET
AAT2400/2401
AAT2400 Pin Descriptions
Sixteen-Channel White LED Driver Solution
with Full LED Current and Timing Control
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14, 32
15
16
17
18
19
20
21
22
23
24, 25
26, 27
28
29
30
31
33
34
35
36
EP
Symbol
CS5
CS6
CS7
CS8
SGND
CS4
CS3
CS2
CS1
RSET
EN
FAULT
PLL
AGND
DGND
VIN
VCC
VCCIO
SDO
COMP
CSFB
SYNC
N/C
LX
PGND
ADDR1
ADDR0
VSYNC
GSCLK
SCLK
SDI
CSB
OVP
Function
O
O
O
O
GND
O
O
O
O
I
I
O
I/O
GND
GND
I
I/O
I/O
O
I
I
I
O
GND
I
I
I
I
I
I
I
I
Description
Output current sink 5¹.
Output current sink 6¹.
Output current sink 7¹.
Output current sink 8¹.
Current sink ground. Connect to GND as closely as possible to the device.
Output current sink 4¹.
Output current sink 3¹.
Output current sink 2¹.
Output current sink 1¹.
Resistor for setting maximum current sink DC level. Connect a resistor between this pin and
AGND pin.
Logic high enable pin. Apply a logic high voltage after power is applied to VIN or connect to VIN
through a RC time delay network to enable the device.
Open drain fault signal. Pull up to logic supply with external resistor.
PLL compensation. Connect associated network between this pin and AGND.
Analog ground. Connect to GND with one single connection.
Digital ground. Connect to GND as closely as possible to the device.
IC and boost converter power supply.
Internally regulated power supply. Decouple with 2.2µF/6.3V capacitor to AGND.
Internally regulated power supply (3.3V) for SDO. Decouple with 2.2µF/6.3V capacitor to
DGND.
SPI interface serial data output.
Boost converter compensation. Connect external resistor and capacitor to this pin and AGND.
Current sink feedback. Connect to slave device CSFBO with a 10kΩ pull-down resistor.
Connect to an external clock for synchronization Connect to PGND if not used.
No connect
Switching node of boost converter. Connect a 10µH inductor between this pin and VIN. Connect
a Schottky diode between this pin and the boost output capacitor.
Power ground of boost converter integrated NMOS switching device. Boost output capacitor
must be placed very close to this pin.
MSB device address. Connect to VCC, GND, SDI or leave unconnected to set address.
LSB device address. Connect to VCC, GND, SDI or leave unconnected to set address.
Vertical sync. PWM operation synchronization and reset.
PWM clock. Apply clock or connect to GND if not used.
SPI interface serial clock.
SPI interface serial data input.
SPI interface active low chip select.
Over-voltage protection pin. Connect resistive divider between VOUT and GND.
Exposed paddle. Connect to PCB GND plane. PCB paddle heat sinking should maintain accept-
able junction temperature.
1. Unused current sink channels must be terminated. Refer to the Channel Disable paragraph in the Application Information section of this datasheet.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202307A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 24, 2012
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