al8807 Diodes, Inc., al8807 Datasheet - Page 2

• Manufacturer Part Number: al8807
• Description: High Efficiency Low Emi 30v 1a Buck Led Driver
• Manufacturer: Diodes, Inc.

Pin Descriptions
Absolute Maximum Ratings
Caution:
Recommended Operating Conditions
AL8807
Document Number: DS35281 Rev. 3 - 2
Pin Name
ESD HBM
CTRL
ESD MM
GND
V
SET
Symbol
I
Symbol
N/C
SW
V
V
V
EP
SW-RMS
I
V
T
CTRLDC
SW-PK
V
CTRLH
IN
CTRLL
T
V
LEAD
V
f
I
CTRL
T
T
SW
SW
SW
ST
IN
IN
J
J
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may
be affected by exposure to absolute maximum rating conditions for extended periods of time.
handling and transporting these devices
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when
SOT25 MSOP-8EP
Human Body Model ESD Protection
Machine Model ESD Protection
Continuous V
SW voltage relative to GND
CTRL pin input voltage
DC or RMS Switch current
Peak Switch current (<10%)
Junction Temperature
Lead Temperature Soldering
Storage Temperature Range
1
2
3
4
5
-
-
Pin Number
Operating Input Voltage relative to GND
Voltage High for PWM dimming relative to GND
Voltage range for 20% to 100% DC dimming relative to GND
Voltage Low for PWM dimming relative to GND
Maximum switching frequency
Continuous switch current
Junction Temperature Range
5, 6
2, 3
EP
4
1
8
7
IN
pin voltage relative to GND
Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin
to reduce EMI.
GND Pin
Dimming and On/Off Control Input.
•
•
•
•
Set Nominal Output Current Pin. Configure the output current of the device.
Input Supply Pin. Must be locally decoupled to GND with > 2.2µF X7R ceramic capacitor
– see applications section for more information.
Exposed pad/TAB connect to GND and thermal mass for enhanced thermal impedance
no connection
Leave floating for normal operation.
(V
Drive to voltage below 0.4V to turn off output current
Drive with DC voltage (0.5V < V
100% of I
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.
CTRL
Parameter
HIGH EFFICIENCY LOW EMI 30V 1A BUCK LED DRIVER
= V
Parameter
OUTnom
REF
= 2.5V giving nominal average output current I
www.diodes.com
2 of 20
CTRL
Descriptions
< 2.5V) to adjust output current from 20% to
Min
6.0
2.6
0.5
-40
0
-65 to +150
Ratings
-0.3~36
-0.3~36
-0.3 ~ 6
1.25
200
150
300
2.5
2.5
OUTnom
Max
125
5.5
0.4
2.5
30
1
1
= 0.1/R
AL8807
© Diodes Incorporated
November 2011
S
)
Unit
Unit
MHz
kV
°C
°C
°C
°C
V
V
V
V
A
A
V
V
V
V
A