AW9364
January 2018 V2.2
www.awinic.com.cn 1 Copyright © 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD
4-Channel 1-wire Dimming LED Driver with Ultra Low
Dropout Current Source
FEATURES
Ultra low dropout: 50mV/20mA(typical)
Support up to 4 LEDs
LED sink current up to 20mA
±1% LED current matching(typical)
En Pin Deglitch circuit
Thermal shutdown protection
16-step brightness control
ESD protection: ±8kV(HBM)
No EMI and switch noise
Packages: DFN2x2-8L
APPLICATIONS
Mobile phone
Digital camera
PDA MP3
DESCRITION
The AW9364 is a 4-channel ultra low dropout constant-
source parallel LED driver. With the proprietary Q-Mir-
rorTM technique, the AW9364 uses an internal resistor to
set the bias current for four LEDs, which are matched to
±1%. The AW9364 incorporates a single wire interface to
program the output current at 16 continuous steps. The
AW9364 has an internal deglitch circuit for filtering the
noise of the EN input. The AW9364 requires only a 40mV
dropout voltage at a 20mA load. The feature makes
AW9364 ideal for battery-operated systems, such as per-
sonal digital assistants.
The AW9364 is available in DFN2x2-8L packages and
is specified over the -40℃ to +85℃ temperature range.
PIN CONFIGURATION AND MARKING
AW9364DNR TOP VIEW
（DFN2x2-8L）
PGND
EN
VIN
AGND LED4
LED3
LED2
LED1
4
3
2
1 8
7
6
5
AW9364DNR MARKING
（DFN2x2-8L）
AL64
XY
AL64 - AW9364DNR
XY - Manufacture Date Code
Figure 1 Pin Configuration of AW9364
AW9364
January 2018 V2.2
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TYPICAL APPLICATION CIRCUITS
LED1
LED2
LED3
LED4
PGND
AGND
VIN
EN
AW9364
2.8V to 5.5V
Pulse Input
1uF
12n≤16
Figure 2 AW9364 Typical Application
LED1
LED2
LED3
LED4
PGND
AGND
VIN
EN
AW9364
2.8V to 5.5V
Pulse Input
1uF
12n≤16 Floating
Figure 3 3-LED Application
AW9364
January 2018 V2.2
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LED1
LED2
LED3
LED4
PGND
AGND
VIN
EN
AW9364
2.8V to 5.5V
Pulse Input
1uF
12n≤16 Floating
Floating
Figure 4 2-LED Application
LED1
LED2
LED3
LED4
PGND
AGND
VIN
EN
AW9364
2.8V to 5.5V
Pulse Input
1uF
12n≤16 Floating
Floating
Floating
Figure 5 1-LED Application
AW9364
January 2018 V2.2
www.awinic.com.cn 4 Copyright © 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD
ORDERING INFORMATION
Order Num-
ber
Temperature
Range
Package
Marking
Moisture
sensitivity
level
Environmental
Information
Packing
Type
AW9364DNR
-40℃～85℃
DFN2x2-8L
AL64
MSL3
RoHS+HF
3000
units/Tape
and Reel
AW9364
Shipping
Package Type
Package Type Shipping
R :Tape & ReelDN:DFN2x2-8L
ABSOLUTE MAXIMUM RATINGS(1)
Parameter
Range
Supply Voltage VDD
-0.3V to 6 V
Input Voltage EN
-0.3V to 6 V
Power Dissipation, ( PD@ TA=25℃）
0.44 W
Maximum Junction Temperature
125℃
Storage Temperature Range
-65℃ to 150℃
Lead Temperature (Soldering 10 Seconds)
260℃
Package Thermal Resistance θJA
76℃/W
ESD Rating(2)
Human Body Model
±8000 V
Latch-up(3)
Latch-up current maximum rating per JEDEC
standard
+IT:450mA
-IT:-450mA
AW9364
January 2018 V2.2
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ELECTRICAL CHARACTERISTICS
Test Condition: TA=25℃, VIN=3.6V, CIN = 1μF (unless otherwise specified)
Parameter
Symbol
Condition
Min
Typ.
Max
Units
Supply Voltage
VIN
2.8
5.5
V
Output Current
ILED
All LEDs 100% setting
16.5
20
23.5
mA
Current Matching
All LEDs 100% setting
-5
5
%
LED Dropout Voltage
VDO
ILED=20mA
50
170
mV
Quiescent Current
IQ
ILED=0
330
μA
Shutdown Current
ISD
VEN=0V，VIN=5.5V
0.1
1
μA
Startup Time
TON
20
μs
Enable High Level Input Voltage
VIH
1.5
V
Enable Low Level Input Voltage
VIL
0.3
V
EN Low Time for Dimming
TLO
0.5
500
μs
EN High Time for Dimming
THI
0.5
μs
Shutdown Delay Time
TOFF
VEN=0V
800
2500
μs
Thermal Shutdown Temperature
TP
145
℃
Hysteresis Temperature
20
℃
NOTE1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to
the device. These are stress ratings only and functional operation of the device at these or any other condi-
tions beyond those indicated under "recommended operating conditions" is not implied. Exposure to abso-
lute-maximum-rated conditions for extended periods may affect device reliability.
NOTE2: The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
NOTE3: Test condition: JEDEC STANDARD NO.78A FEBRUARY 2006.
AW9364
January 2018 V2.2
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PIN DEFINITION
PIN
Symbol
Description
4
AGND
Analog Ground
1
PGND
Power Ground
3
VIN
Supply Input
2
EN
Enable Pin. Active high, with an internal 150kΩ pull-down
resistor.
5
LED4
LED4 Pin, Connect to the LED cathode, leave it to con-
nect GND or open if unused.
6
LED3
LED3 Pin, Connect to the LED cathode, leave it to con-
nect GND or open if unused.
7
LED2
LED2 Pin, Connect to the LED cathode, leave it to con-
nect GND or open if unused.
8
LED1
LED1 Pin, Connect to the LED cathode, leave it to con-
nect GND or open if unused.
9
GND
Exposed pad, should be connected to gnd.
AW9364
January 2018 V2.2
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TYPICAL OPERATION CHARACTERISTICS
Test condition：TA=25℃，VIN=3.6V, CIN=1μF unless otherwise specified.
2.8 3.0 3.2 3.4 3.6 3.8 4.2 4.4
800
700
600
900
500
400
300
200
100
Supply Voltage (V)
Shutdown Time vs Supply Voltage
Shutdown Time (uS)
Time (100us/Div)
Line Transient Response
Current
EN
-40 -25 -10 5 20 35 50 65 80 95
16
17
18
19
20
21
22
23
24
LED Current (mA)
Temperature (℃)
LED Current vs Temperature
00.2 0.4 0.6 0.8 1.2
25
20
15
10
5
LED Current vs LED Dropout Voltage
LED Current (mA)
LED Dropout Voltage(V)
Efficiency vs Supply Voltage
0
10
20
30
40
50
60
70
80
90
100
3.2 3.4 3.6 3.8 4.0 4.2 4.4
Efficiency (%)
LED VF=3.15V/20mA
Supply Voltage (V)
LED Current vs Supply Voltage
8
12
16
20
24
3.2 3.4 3.6 3.8 4.0
Supply Voltage (V)
4
6
10
14
18
22
LED Current (mA)
LED VF=3.15V/20mA
AW9364
January 2018 V2.2
www.awinic.com.cn 8 Copyright © 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD
BLOCK DIAGRAM
OTP
Bandgap
DAC
VIN
AGND
PGND
LED2 LED3 LED4
EN
LED1
Current Source
Deglitch
Q-Mirror
Figure 6 Functional Block Diagram of AW9364
EN
ILED
16/16 15/16 14/16 13/16 12/16 3/16 2/16 1/16
16/16
20us<TON 0.5us<THI 0.5us<TLO<500us 2.5ms<TSHDN
1 2 34515
616 1
Figure 7 16-steps brightness control of AW9364
AW9364
January 2018 V2.2
www.awinic.com.cn 9 Copyright © 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD
DETAILED DESCRIPTION
The AW9364 is a high efficiency, no noise LED driver which powering up to 4-channel LED’s at 20mA. Figure
2 shows a typical application circuit for four LEDs. In order to maintain LED constant current, the input voltage
must provide the required LED forward voltage and current source dropout voltage. The AW9364 requires only
40mV dropout voltage at a 20mA load on each output to match the LED brightness.
Enable Input
The EN input is used to enable or disable the AW9364. Pulling the EN pin higher than 1.5V will enable the
device. For producing constant, non-pulsating output current compare to conventional pulse width modulation
(PWM) dimming scheme, the AW9364 incorporates a 4-bit DAC for brightness control to program the output
current at 16 continuous steps: 20~1.25mA. Table 1 shows detail for current setting.
Table 1 Current Setting
EN Rise
Edge Number
Current (mA)
EN Rise
Edge Number
Current (mA)
1
20
9
10
2
18.75
10
8.75
3
17.5
11
7.5
4
16.25
12
6.25
5
15
13
5
6
13.75
14
3.75
7
12.5
15
2.5
8
11.25
16
1.25
The figure 7 shows the detail operation of 16-steps brightness control. When 1-wire pulse counting dimming
is used, the ready time is recommended to be greater than 20μs for enabling the device, the pulse high time
THI recommended to be greater than 0.5μs, and the pulse low time TLO is recommended to be greater than
0.5μs and less than 500μs. A constant current is sourced as long as the EN signal remains high. The shutdown
feature reduces quiescent current to less than 0.1μA.
Deglitch Circuit
The AW9364 has an internal deglitch circuit for filtering the noise of the EN input. For example, the EN pin is
sometimes superimposed with noise, or a so-called glitch, and the glitch may be greater than the enable high
level input voltage VIH. In such a case, the deglitch circuit is used as a filter circuit for removing the glitch.
Over Thermal Protection
The AW9364 has an internal over thermal protection circuit. The over temperature circuit will turn off the output
current to decrease the power dissipation when the junction temperature exceeds 145℃ and will resume the
output circuit when the junction temperature falls below 125℃
Efficiency
The AW9364 offers superior efficiency performance. Due to the ultra low-dropout current sinks and direct
connection to the supply, higher average efficiency and higher peak efficiency is obtained.
The system efficiency, defined as the ratio between the LED's power and the input power can be calculated
simply as the following:
AW9364
January 2018 V2.2
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Efficiency= (VF1×ILED1+ VF2×ILED2+ VF3×ILED3+ VF4×ILED4)/(VIN × IIN)
VF is the LED forward voltage, VIN= VF+VDO, VDO is the dropout voltage needed in the current source.
AW9364
January 2018 V2.2
www.awinic.com.cn 11 Copyright © 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD
PACKAGE DESCRIPTION
A2
A
A1
A
A1
A2
b
c
e
D
E
E2
Symbol Min Max
DFN-8L
Unit:mm
0.800
0.000
0.250
0.350
0.500 (BSC)
1.950
0.550
0.900
0.050
0.300
0.400
2.050
0.650
Typ
2.000
1.950 2.000 2.050
0.850
0.200
0.300
0.600
D2 1.150 1.250
1.200
0.203( Ref.)
Top View
Side View
D
E
D1 1.500 ( Ref.)
be
c
D2
D1
E2
Bottom View
LAND PATTERN
DFN2X2-8L
0.70±0.05
PACKAGE
OUTLINE
0.60±0.05
(2 SIDES)
1.15±0.05
2.55±0.05
0.25±0.05
0.50 BSC
1.20±0.05
AW9364
January 2018 V2.2
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REEL INFORMATION
DFN2X2-8L
AW9364
January 2018 V2.2
www.awinic.com.cn 13 Copyright © 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD
REVISION HISTORY
Date
Vision
Description
2017-4-12
V1.7
-
2018-1-9
V2.2
1. Refreshed documental format;
2. Updated some characteristics information.
AW9364
January 2018 V2.2
www.awinic.com.cn 14 Copyright © 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD
DISCLAIMER
Information in this document is believed to be accurate and reliable. However, Shanghai AWINIC Technol-
ogy Co., Ltd (AWINIC Technology) does not give any representations or warranties, expressed or implied, as
to the accuracy or completeness of such information and shall have no liability for the consequences of use
of such information.
AWINIC Technology reserves the right to make changes to information published in this document, including
without limitation specifications and product descriptions, at any time and without notice. Customers shall
obtain the latest relevant information before placing orders and shall verify that such information is current
and complete. This document supersedes and replaces all information supplied prior to the publication
hereof.
AWINIC Technology products are not designed, authorized or warranted to be suitable for use in medical,
military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an
AWINIC Technology product can reasonably be expected to result in personal injury, death or severe prop-
erty or environmental damage. AWINIC Technology accepts no liability for inclusion and/or use of AWINIC
Technology products in such equipment or applications and therefore such inclusion and/or use is at the cus-
tomer’s own risk.
Applications that are described herein for any of these products are for illustrative purposes only. AWINIC
Technology makes no representation or warranty that such applications will be suitable for the specified use
without further testing or modification.
All products are sold subject to the general terms and conditions of commercial sale supplied at the time of
order acknowledgement.
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Resale of AWINIC components or services with statements different from or beyond the parameters stated by
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