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STTH3002G

P1-P3P4-P6P7-P9P10-P12P13-P13
AL8400/ AL8400Q
Document number: DS35115 Rev. 4 - 2
1 of 13
www.diodes.com
August 2012
© Diodes Incorporated
AL8400 /
A
L8400Q
LINEAR LED DRIVER-CONTROLLER with 200mV
CURRENT SENSE VOLTAGE and AUTOMOTIVE GRADE
Description
The AL8400 is a 5-terminal adjustable Linear LED driver-controller
offering excellent temperature stability and output handling capability.
The AL8400 simplifies the design of linear and isolated LED drivers.
With its low 200mV current sense FB pin, it controls the regulation of
LED current with minimal power dissipation when compared to
traditional linear LED drivers. This makes it ideal for medium to high
current LED driving.
The AL8400 open-collector output can operate from 0.2V to 18V
enabling it to drive external MOSFET and Bipolar transistors. This
enables the MOSFET and Bipolar selection to be optimized for the
chosen application. It also provides the capability to drive longer LED
chains, by tapping V
CC
from the chain, where the chain voltage may
exceed 18V.
It is available in the space saving low profile SOT353 package.
The AL8400Q is Automotive Grade and is AEC-Q100 Grade 1
qualified.
Applications
• Isolated Offline LED Lamps
• Linear LED Driver
• LED Signs
• Instrumentation Illumination
Pin Assignments
Features
• Low Reference Voltage (V
FB
= 0.2V)
• -40 to +125°C Temperature Range
• 3% Reference Voltage Tolerance at +25°C
• Low Temperature Drift
• 0.2V to 18V Open-Collector Output
• High Power Supply Rejection:
(> 45dB at 300kHz)
• AL8400QSE-7 Automotive Grade qualified to AEC-Q100 Grade 1
• SOT353: Available in “Green” Molding Compound (No Br, Sb)
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
OUT
FB
E1
GND
R
B
Q2
R
SET
C
L
I
LED
= V
REF
/R
SET
C
D
AL8400
Vcc
12
3
5
4
GND
Vcc
Green
AL8400/ AL8400Q
Document number: DS35115 Rev. 4 - 2
2 of 13
www.diodes.com
August 2012
© Diodes Incorporated
AL8400 /
A
L8400Q
Pin Descriptions
Pin
Number
Name Function
1 E1 Emitter Connection. Connect to GND.
2 GND Analog Ground. Ground return for reference and amplifier. Connect to E1.
3 V
CC
Supply Input. Connect a 0.47F ceramic capacitor close to the device from V
CC
to GND.
4 FB Feedback Input. Regulates to 200mV nominal.
5 OUT Output. Connect a capacitor close to device between OUT and GND. See the Applications Information section.
Functional Block Diagram
Figure 1 Block Diagram
Absolute Maximum Ratings (@T
A
= +25°C, unless otherwise specified.)
Symbol Parameter Rating Unit
V
CC
Supply Voltage Relative to GND 20 V
V
OUT
OUT Voltage Relative to GND 20 V
V
FB
FB Voltage Relative to GND 20 V
V
E1
E1 Voltage Relative to GND -0.3 to+0.3 V
T
J
Operating Junction Temperature -40 to 150 °C
T
ST
Storage Temperature -55 to 150 °C
These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure.
Operation at the absolute maximum rating for extended periods may reduce device reliability.
Package Thermal Data
Package θ
JA
P
DIS
T
A
= +25°C, T
J
= +150°C
SOT353 400°C/W 310mW
AL8400/ AL8400Q
Document number: DS35115 Rev. 4 - 2
3 of 13
www.diodes.com
August 2012
© Diodes Incorporated
AL8400 /
A
L8400Q
Recommended Operating Conditions (@T
A
= +25°C, unless otherwise specified.)
Symbol Parameter Min Max Units
V
CC
Supply Voltage Range 2.2 18
V
V
OUT
OUT Voltage Range 0.2 18
I
OUT
OUT Pin Current 0.3 15 mA
T
A
Operating Ambient Temperature Range -40 +125 °C
Electrical Characteristics (Note 4) (@T
A
= +25°C, V
CC
= 12V, V
OUT
= V
FB
, I
OUT
= 1mA, unless otherwise specified.)
Symbol Parameter Conditions Min Typ Max Units
V
FB
Feedback Voltage
T
A
= +25°C 0.194 0.2 0.206
V
T
A
= -40°C to +125°C 0.190 0.210
FB
LOAD
Feedback Pin Load Regulation I
OUT
= 1 to 15mA
T
A
= +25°C 3.1 6
mV
T
A
= -40°C to +125°C 10
FB
LINE
Feedback Pin Line Regulation V
CC
= 2.2V to 18V
T
A
= +25°C 0.1 1.5
mV
T
A
= -40°C to +125°C 2
FB
OVR
Output Voltage Regulation
V
OUT
= 0.2V to 18V, I
OUT
=1mA
(Ref. Figure 1)
T
A
= +25°C 2
mV
T
A
= -40°C to +125°C 3
I
FB
FB Input Bias Current V
CC
= 18V
T
A
= +25°C -45
nA
T
A
= -40°C to +125°C -200 0
I
CC
Supply Current V
CC
= 2.2V to 18V, I
OUT
=10mA
T
A
= +25°C 0.48 1
mA
T
A
= -40°C to +125°C 1.5
I
OUT(LK)
OUT Leakage Current V
CC
= 18V, V
OUT
= 18V, V
FB
=0V
T
A
= +25°C 0.1
µA
T
A
= +125°C 1
Z
OUT
Dynamic Output Impedance I
OUT
= 1 to 15mA, f < 1kHz
T
A
= +25°C 0.25 0.4
Ω
T
A
= -40°C to +125°C 0.6
PSRR Power Supply Rejection Ratio f = 300kHz, V
A
C
= 0.3V
PP
T
A
= +25°C 45 dB
BW Amplifier Unity Gain Frequency T
A
= +25°C 600 kHz
G Amplifier Transconductance T
A
= +25°C 4500 mA/V
Note: 4. Production testing of the device is performed at +25°C. Functional operation of the device and parameters specified over the operating temperature
range are guaranteed by design, characterization and process control.
Typical Characteristics
Load Regulation
Line Regulation
P1-P3P4-P6P7-P9P10-P12P13-P13

STTH3002G

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DIODE GEN PURP 200V 30A D2PAK
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