Al8806, Pin descriptions, Functional block diagram – Diodes AL8806 User Manual
Page 2
AL8806
Document number: DS35144 Rev. 5 - 2
2 of 15
July 2013
© Diodes Incorporated
AL8806
Pin Descriptions
Pin
Name
Pin Number
Function
MSOP-8EP
SW
5, 6
Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI.
GND 2,
3
GND
Pin
CTRL 4
Dimming and On/Off Control Input.
Leave floating for normal operation.
(V
CTRL
= V
REF
= 2.5V giving nominal average output current I
OUTnom
= 0.1/R
S
)
Drive to voltage below 0.4V to turn off output current
Drive with DC voltage (0.5V < V
CTRL
< 2.5V) to adjust output current from 20% to 100% of I
OUTnom
A PWM signal (low level ≤ 0.4V and high level > 2.6; transition times less than 1us) allows the output current to be
adjusted below the level set by the resistor connected to SET input pin.
SET
1
Set Nominal Output Current Pin. Configure the output current of the device.
V
IN
8
Input Supply Pin. Must be locally decoupled to GND with > 2.2µF X7R ceramic capacitor – see applications section for
more information.
EP EP
Exposed pad:
Connect to GND and thermal mass for enhanced thermal impedance. It should not be used as electrical ground
conduction path.
N/C 7
no
connection
Functional Block Diagram