AAT3169IWO-T1 [SKYWORKS]
LED Driver;
| 型号： | AAT3169IWO-T1 |
| 厂家： | 
SKYWORKS SOLUTIONS INC. |
| 描述： | LED Driver 驱动 光电二极管 接口集成电路 |
| 文件： | 总19页 (文件大小：1752K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
General Description
Features
The AAT3169 is a low noise, constant frequency charge
pump DC/DC converter that uses a tri-mode load switch
(1X), fractional (1.5X), and doubling (2X) conversion to
maximize efficiency for white LED applications. The
AAT3169 is capable of driving six LEDs for a total of
180mA from a 2.7V to 5.5V input. The current sinks may
be operated individually or in parallel for driving higher
current LEDs. A low external parts count (two 1µF flying
capacitors and two small 1µF capacitors at IN and
OUTCP) make this part ideally suited for small, battery-
powered applications.
•ꢀ VIN Range: 2.7V to 5.5V
•ꢀ FullyꢀProgrammableꢀCurrentꢀwithꢀSingleꢀWire
16-Step Logarithmic Scale
15/20/30mA Max Current
Four Low-Current Settings Down to 115µA
Low IQ (65µA) for Single-Channel, Low-Current
▪
▪
▪
▪
Mode
•ꢀ Tri-Modeꢀ1X,ꢀ1.5X,ꢀandꢀ2XꢀChargeꢀPumpꢀforꢀMaximumꢀ
Efficiency and VF Coverage
•ꢀ DrivesꢀUpꢀtoꢀSixꢀLEDs
•ꢀ IndividualꢀMain-Subꢀ(5-1)ꢀGroupꢀControl
•ꢀ NoꢀInductors,ꢀLowꢀNoiseꢀOperation
•ꢀ 1MHzꢀConstantꢀSwitchingꢀFrequency
•ꢀ SmallꢀApplicationꢀCircuit
•ꢀ Built-InꢀThermalꢀProtection
•ꢀ Built-InꢀAuto-DisableꢀforꢀOpenꢀCircuit
•ꢀ AutomaticꢀSoftꢀStart
Skyworks' AS2Cwire™ (Advanced Simple Serial Control)
serial digital input is used to enable, disable, and set cur-
rent for each LED with a 16-level logarithmic scale plus
four low-current settings down to 115µA. For optimized
efficiency, low-current settings require only 65µA of
housekeeping current.
•ꢀ IQ <1µA in Shutdown
Each output of the AAT3169 is equipped with built-in
protection for output short-circuit and auto-disable for
load short-circuit conditions. Built-in soft-start circuitry
prevents excessive inrush current during start-up. A low-
current shutdown feature disconnects the load from the
input and reduces quiescent current to less than 1µA.
•ꢀ Thermally-EnhancedꢀTDFN33-14,ꢀSTDFN33-14,ꢀ
QFN44-16, or TSOPJW-14 Package
Applications
•ꢀ Colorꢀ(RGB)ꢀLighting
•ꢀ ProgrammableꢀCurrentꢀSinkꢀ
•ꢀ TransmissiveꢀDisplays
•ꢀ WhiteꢀLEDꢀBacklighting
The AAT3169 is available in a Pb-free, space-saving,
thermally-enhanced 16-pin 4x4mm QFN package, a
14-pin 3x3mm TDFN package, a low-profile 14-pin
3x3mm STDFN package or a 14-pin TSOPJW package and
is rated over the -40°C to +85°C temperature range.
•ꢀ WhiteꢀPhotoꢀFlashꢀforꢀDigitalꢀStillꢀCameras
Typical Application
C1+
C1-
C2+
C1
C2
1µF
1µF
Main
D3
Sub
D6
C2-
OUTCP
COUT
1µF
IN
2.7V to 5.5V
CIN
1µF
D1
D2
D4
D5
AAT3169
D1
D2
D3
D4
D5
D6
EN/SET
EN/SET
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Pin Descriptions
Pin Number
AAT3169IWO,
AAT3169IFO
AAT3169ISN
AAT3169ITO Symbol Function
1
2
3
2
3
n/a
13
12
n/a
D6
EN/SET
N/C
Current sink input #6.
AS2Cwire serial interface control pin.
No connection.
Charge pump output to drive load circuit. Requires 1µF capacitor
connected between this pin and ground.
Flying capacitor 2 positive terminal. Connect a 1µF capacitor be-
tween C2+ and C2-.
Flying capacitor 1 positive terminal. Connect a 1µF capacitor be-
tween C1+ and C1-.
4
5
6
6
7
4
9
8
OUTCP
C2+
11
C1+
7
8
5
8
10
10
7
5
C1-
C2-
GND
Flying capacitor 1 negative terminal.
Flying capacitor 2 negative terminal.
Ground.
9, 11
Input power supply. Requires 1µF capacitor connected between this
pin and ground.
10
9
6
IN
12
13
14
15
16
11
12
13
14
1
4
3
2
1
14
D1
D2
D3
D4
D5
Current sink input #1.
Current sink input #2.
Current sink input #3.
Current sink input #4.
Current sink input #5.
Exposed paddle (bottom); connect to ground as closely as possible
to the package.
EP
n/a
n/a
Pin Configuration
TDFN33-14,
STDFN33-14
(Top View)
QFN44-16
(Top View)
TSOPJW-14
(Top View)
1
14
13
12
11
10
9
D4
D3
D5
1
2
14
13
D5
D6
EN/SET
C1+
C1-
D4
D3
D2
D1
GND
IN
C2-
2
3
4
5
6
7
D6
1
2
3
4
12
11
10
9
D6
EN/SET
N/C
D1
D2
EN/SET
C1+
3
4
5
6
7
12
11
10
9
GND
IN
D1
GND
IN
C1-
OUTCP
C2+
OUTCP
C2+
8
OUTCP
GND
8
C2-
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Absolute Maximum Ratings1
Symbol
Description
Value
Units
VIN
InputꢀVoltageꢀtoꢀGND
EN/SETꢀVoltageꢀtoꢀGND
Maximum DC Output Current
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
-0.3 to 6
-0.3 to VIN + 0.3
210
V
V
mA
°C
°C
VEN/SET
2
IOUT
TJ
TLEAD
-40 to 150
300
Thermal Information3
Symbol
Description
Value
Units
QFN44-164
STDFN33-144
TDFN33-14
TSOPJW-14
QFN44-16
TDFN33-14
STDFN33-14
TSOPJW-14
2.0
0.625
50
PD
Maximum Power Dissipation
W
qJA
Maximum Thermal Resistance
°C/W
160
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Based on long-term current density limitation.
3. Mounted on an FR4 board.
4. Derate 20mW/°C above 25°C.
Skyworks Solutions, Inc.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Electrical Characteristics1
CIN = COUT = C1 = C2 = 1.0µF; TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C, VIN
3.6V.
=
Symbol
Description
Conditions
Min
Typ
Max Units
Input Power Supply
VIN Operation Range
2.7
5.5
V
1XꢀMode,ꢀ3.0ꢀ≤ꢀVINꢀ≤ꢀ5.5,ꢀActive,ꢀ
NoꢀLoadꢀCurrent,ꢀHighꢀCurrentꢀMode
1.5XꢀMode,ꢀ3.0ꢀ≤ꢀVINꢀ≤ꢀ5.5,ꢀActive,ꢀ
NoꢀLoadꢀCurrent,ꢀHighꢀCurrentꢀMode
0.3
1
mA
ICC
Operating Current
2XꢀMode,ꢀ3.0ꢀ≤ꢀVINꢀ≤ꢀ5.5,ꢀActive,ꢀ
NoꢀLoadꢀCurrent,ꢀHighꢀCurrentꢀMode
1
1XꢀMode,ꢀ3.0ꢀ≤ꢀVINꢀ≤ꢀ5.5,ꢀD6ꢀActive,ꢀ
No Load Current, Low Current Mode
VEN/SET = 0V
65
90
µA
µA
ISHDN
IDX
Shutdown Current
Current Accuracy
1
ISET = 20mA, TA = 25°C
ISET = 2.4mA, TA = 25°C
ISET = 400µA, TA = 25°C
VF:D1:D6 = 3.6V
-10
-20
-20
10
20
20
%
Low Current Accuracy
Current Matching2
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any ISINK Pin
I(D-Match)
VTH
0.5
%
ISET = 20mA
150
mV
Charge Pump Section
TSS
Soft-Start Time
100
µs
FCLK
Clock Frequency
1000
kHz
EN/SET
VEN(L)
VEN(H)
TEN/SET LO
TEN/SET_HI_MIN
TEN/SET_HI_MAX
TOFF
Enable Threshold Low
EnableꢀThresholdꢀHigh
EN/SET Low Time
MinimumꢀEN/SETꢀHighꢀTime
MaximumꢀEN/SETꢀHighꢀTime
EN/SET Off Timeout
VIN = 2.7V
VIN = 5.5V
0.4
75
V
V
1.4
0.3
µs
ns
µs
µs
µs
µA
50
75
500
500
1
TLAT
IEN/SET
EN/SET Latch Timeout
EN/SET Input Leakage
-1
1. The AAT3169 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. Current matching is defined as the deviation of any sink current from the average of all active channels.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF, VIN = 3.6V, TA = 25°C, unless otherwise noted.
Turn-On to 1X Mode
Efficiency vs. Supply Voltage
(V = 4.2V; 20mA/Channel)
IN
100
4.9mA/ch
VF = 2.9V
10.9mA/ch
VF = 3.1V
20mA/ch
VF = 3.4V
EN
90
80
70
60
50
(2V/div)
CP
(2V/div)
V
SINK
(500mV/div)
I
IN
(200mA/div)
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Time (100µs/div)
Supply Voltage (V)
Turn-On to 1.5X Mode
Turn-On to 2X Mode
(V = 3.8V; 20mA/Channel)
IN
(V = 2.8V; 20mA/Channel)
IN
EN
EN
(2V/div)
(2V/div)
CP
CP
(2V/div)
(2V/div)
V
V
SINK
SINK
(500mV/div)
(500mV/div)
I
I
IN
IN
(200mA/div)
(200mA/div)
Time (100µs/div)
Time (100µs/div)
Turn-Off from 1.5X Mode
Current Matching vs. Temperature
(V = 3.5V; 20mA/Channel)
IN
20.2
20.0
19.8
19.6
19.4
Channel 1
Channel 2
EN
(2V/div)
Channel 5
V
F
(1V/div)
Channel 3
I
IN
Channel 4
Channel 6
(100mA/div)
19.2
-40
60
-20
0
20
40
80
Time (100µs/div)
Temperature (°C)
Skyworks Solutions, Inc.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF, VIN = 3.6V, TA = 25°C, unless otherwise noted.
Load Characteristics
Load Characteristics
(V = 3.8V; 1.5X Mode; 15mA/Channel)
IN
(V = 2.9V; 2X Mode; 15mA/Channel)
IN
V
V
IN
IN
(40mV/div)
(40mV/div)
CP
CP
(40mV/div)
(40mV/div)
V
V
SINK
SINK
(40mV/div)
(40mV/div)
Time (500ns/div)
Time (500ns/div)
Load Characteristics
Load Characteristics
(V = 4.0V; 1.5X Mode; 20mA/Channel)
IN
(V = 3.1V; 2X Mode; 20mA/Channel)
IN
V
V
IN
IN
(40mV/div)
(40mV/div)
CP
CP
(40mV/div)
(40mV/div)
V
V
SINK
SINK
(40mV/div)
(40mV/div)
Time (500ns/div)
Time (500ns/div)
Load Characteristics
Load Characteristics
(V = 4.3V; 1.5X Mode; 30mA/Channel)
IN
(V = 3.6V; 2X Mode; 30mA/Channel)
IN
V
V
IN
IN
(40mV/div)
(40mV/div)
CP
CP
(40mV/div)
(40mV/div)
V
V
SINK
SINK
(40mV/div)
(40mV/div)
Time (500ns/div)
Time (500ns/div)
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF, VIN = 3.6V, TA = 25°C, unless otherwise noted.
T
vs. V
T
vs. V
LAT
IN
OFF
IN
350
300
250
200
150
100
50
400
350
300
250
200
150
100
50
-40°C
-40°C
85°C
25°C
25°C
85°C
0
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
V
IN
(V)
V (V)
IN
Input Ripple vs. V
V vs. V
IH
IN
IN
1.2
1.1
25
20
15
10
5
1
30mA/ch
-40°C
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
25°C
85°C
20mA/ch
10.9mA/ch
0
2.50 2.67 2.84 3.01 3.18 3.35 3.52 3.69 3.86 4.03 4.20
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
V
IN
(V)
V (V)
IN
V vs. V
IL
IN
1.2
1.1
1
-40°C
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
25°C
85°C
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
V
(V)
IN
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Functional Block Diagram
C1+ C1- C2+ C2-
1X, 1.5X, 2X
Charge Pump
IN
OUTCP
Soft-Start
Control
1MHz
Oscillator
Voltage
Reference
D1
D/A
D/A
D/A
D/A
D/A
D2
D3
D4
D5
Main
6 x 16 Bit
ROM
AS2Cwire
Interface
EN/SET
Sub
6 x 16 Bit
ROM
D/A
D6
GND
of two groups of current sink input: D1~D5 and D6.
Functional Description
The AAT3169 is a tri-mode load switch (1X) and high
efficiency (1.5X or 2X) charge pump device intended for
white LED backlight applications. To maximize power
conversion efficiency, an internal sensing circuit moni-
tors the voltage required on each constant current sink
input and sets the load switch and charge pump modes
based on the input battery voltage and the current sink
input voltage. As the battery discharges over time, the
AAT3169 charge pump is enabled when any of the six
current sink inputs near dropout. The charge pump ini-
tially starts in 1.5X mode. If the charge pump output
droops enough for any current source output to become
close to dropout, the charge pump will automatically
transition to 2X mode. The AAT3169 requires only four
external components: two 1µF ceramic capacitors for the
charge pump flying capacitors (C1 and C2), one 1µF
ceramic input capacitor (CIN), and one 0.33µF to 1µF
ceramic charge pump output capacitor (COUT).
Constant Current Output Level Settings
The constant current sink levels for D1 to D6 are set via
the serial interface according to a logarithmic scale where
each code is approximately 1.8dB lower than the previous
code. In this manner, LED brightness appears linear with
each increasing code count. Because the inputs D1 to D6
are true independent constant current sinks, the voltage
observed on any single given input will be determined by
the actual forward voltage (VF) for the LED being driven.
Since the input current sinks of the AAT3169 are pro-
grammable, no PWM (pulse width modulation) or addi-
tional control circuitry is needed to control LED bright-
ness. This feature greatly reduces the burden on a micro-
controller or system IC to manage LED or display bright-
ness, allowing the user to “set it and forget it.” With its
high-speedꢀ serialꢀ interfaceꢀ (1MHzꢀ dataꢀ rate),ꢀ theꢀ inputꢀ
sink current of the AAT3169 can be changed successively
to brighten or dim LEDs in smooth transitions (e.g., to
fade-out) or in abrupt steps, giving the user complete
programmability and real-time control of LED brightness.
The six constant current sink inputs (D1 to D6) can drive
six individual LEDs with a maximum current of 30mA
nominal each. Unused sink inputs should be connected
to OUTCP, otherwise the part will operate only in 2X
charge pump mode. The AS2Cwire serial interface
enables the AAT3169 and sets the current sink magni-
tudes. AS2Cwire addressing allows independent control
The 16 individual current level settings are each approx-
imately 1.8dB apart (see Table 1). Code 1 is full scale;
Code 15 is full scale attenuated by approximately 25dB;
and Code 16 is reserved as a “no current” setting.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
high for the TLAT timeout period, a burst of rising edges
Mean
Mean
Mean
signifying data, and a TLAT timeout for the data registers.
Once an address is set, then multiple writes consisting of
data only (without address) to the corresponding data
register are allowed. Address 0 is the default address on
the first rising edge after the AAT3169 has been disabled.
If data is presented on the first rising edge with no prior
address, both data registers are simultaneously loaded.
Data
30mA Max 20mA Max 15mA Max
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
30.0
29.3
27.8
25.2
22.8
20.9
18.5
16.1
13.7
11.5
9.4
20.01
19.5
18.5
17.0
15.4
14.2
12.5
10.9
9.3
8.0
6.5
4.9
3.3
15.0
14.6
13.9
12.7
11.5
10.5
9.3
8.1
7.0
6.0
4.9
The maximum current level is determined by the value
set in Register 3, the Max Current register. Three scales
are available for high operating currents with maximum
current levels of 30mA, 20mA, or 15mA. Each scale
maintains approximately 1.8dB steps between settings.
A separate mode is available for ultra-low LED current
operation. When the Max Current register (Register 3) is
set to the Low Current setting, the Low Current register
(Register 4) must be programmed. The two most sig-
nificant bits of the Low Current register control whether
or not a given bank of current sinks is enabled. The least
two significant bits of the Low Current register sets the
current level for both banks. For low current settings, the
charge pump may be enabled if required by the battery
voltage and LED forward voltage conditions, and 1X
mode quiescent current is approximately 130µA for mul-
tiple channels or 65µA for Channel 6 operation only. Both
banks of current sinks must be in the same high or low
current mode of operation.
7.0
4.7
3.3
1.9
3.7
2.6
1.9
1.2
2.4
1.5
0.0
0.0
0.0
Table 1: Mean Table of AAT3169 Output Current.
AS2Cwire Serial Interface
The current sink input magnitude on the AAT3169 is con-
trolled by Skyworks' Advanced Simple Serial Control
(AS2Cwire) serial digital input. AS2Cwire adds addressing
capability for multiple data registers over the Simple
Serial Control™ (S2Cwire™), which is only capable of
controlling a single register. The AAT3169 has four regis-
ters: Bank1, Bank2, Max Current, and Low Current.
When EN/SET is held low for an amount of time greater
than TOFF, the AAT3169 enters shutdown mode and draws
less than 1µA from the input. During shutdown, the
address register is reset to 0 and data registers are reset
to their default values.
Three addresses are used to control the two registers.
Address 0 addresses both registers simultaneously to
allow the loading of both registers with the same data
using a single write protocol. Address 1 addresses
Register 1 for D1 to D5 current level settings. Address 2
addresses Register 2 for D6 current level settings.
AS2Cwire Serial Interface Addressing
AS2Cwire relies on the number of rising edges of the EN/
SET pin to address and load the registers. AS2Cwire
latches data or address after the EN/SET pin has been
held high for time TLAT. Address or data is differentiated
by the number of EN/SET rising edges. Since the data
registers are 4 bits each, the differentiating number of
pulses is 24 or 16, so that Address 0 is signified by 17
rising edges, Address 1 by 18 rising edges, and Address
2 by 19 rising edges. Data is set to any number of rising
edges between 1 and including 16. A typical write pro-
tocol is a burst of EN/SET rising edges, signifying a par-
ticular address, followed by a pause with EN/SET held
EN/SET
Address Rising Edges
Data Register
AAT3169
01
1
2
3
17
18
19
20
21
1&2: D1~D6 Current
1: D1~D5 Current
2: D6 Current
3: Max Current
4: Low Current
4
Data
11
2
3
Max Current
20mA
30mA
15mA
4
Low Current (see Low Current Register for values)
1. Denotes the default values after EN/SET is toggled high.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Low Current Register (Address 4)
Auto-Disable Feature
AAT3169 is equipped with an auto-disable feature for
each LED channel. After the IC is enabled and started
up, a test current of 120µA (typical) is forced through
each sink channel. The channel will be disabled if the
voltage of that particular SINK pin does not drop to a
certain threshold. This feature is very convenient for
disabling an unused channel or during an LED fail-short
event.
Main Low
Current On
Sub Low
Current On Current
Data
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Yes
115µA
175µA
280µA
400µA
115µA
175µA
280µA
400µA
115µA
175µA
280µA
400µA
Thermal Protection
The AAT3169 has a built-in thermal protection circuit
that will shut down the charge pump if the die tempera-
ture rises above the thermal limit, as would be the case
during a short circuit of the OUTCP pin.
AS2Cwire Serial Interface Timing
Address
Data
THI
TLAT
TLO
TLAT
EN/SET
1
2
17
18
1
2 . . .
n <= 16
0
Address
Data Reg 1
Data Reg 2
1
0
0
n
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Capacitor Characteristics
Applications Information
Ceramic composition capacitors are highly recommend-
ed over all other types of capacitors for use with the
AAT3169. Ceramic capacitors offer many advantages
over their tantalum and aluminum electrolytic counter-
parts. A ceramic capacitor typically has very low
Equivalent Series Resistance (ESR), is lowest cost, has a
smaller PCB footprint, and is non-polarized. Low ESR
ceramic capacitors help maximize charge pump tran-
sient response. Since ceramic capacitors are non-polar-
ized, they are not prone to incorrect connection damage.
LED Selection
Although the AAT3169 is designed for driving white
LEDs, the device also can be used to drive most types of
LEDs with forward voltages from 2.0V to 4.7V. LED appli-
cations may include main and sub-LCD display back-
lighting,ꢀ cameraꢀ photo-flashꢀ applications,ꢀ colorꢀ (RGB)ꢀ
LEDs, infrared (IR) diodes for remotes, and other loads
benefiting from a controlled output current generated
from a varying input voltage. Since the D1 to D6 input
current sinks are matched with negligible voltage depen-
dence, the LED brightness will be matched regardless of
the specific LED forward voltage (VF) levels.
Equivalent Series Resistance
ESR is an important characteristic to consider when
selecting a capacitor. ESR is resistance internal to a
capacitor that is caused by the leads, internal connec-
tions, size or area, material composition, and ambient
temperature. Capacitor ESR is typically measured in mil-
liohms for ceramic capacitors and can range to more
than several ohms for tantalum or aluminum electrolytic
capacitors.
In some instances (e.g., in high luminous output appli-
cations such as photo flash), it may be necessary to
drive high-VF type LEDs. The low dropout current sinks
in the AAT3169 make it capable of driving LEDs with
forward voltages as high as 4.7V at full current from an
input supply as low as 3.0V. Outputs can be paralleled to
drive high-current LEDs without complication.
Ceramic Capacitor Materials
Device Switching Noise Performance
Ceramic capacitors less than 0.1µF are typically made
fromꢀ NPOꢀ orꢀ C0Gꢀ materials.ꢀ NPOꢀ andꢀ C0Gꢀ materialsꢀ
generally have tight tolerance and are very stable over
temperature. Larger capacitor values are usually com-
posed of X7R, X5R, Z5U, or Y5V dielectric materials.
Large ceramic capacitors (i.e., greater than 2.2µF) are
often available in low-cost Y5V and Z5U dielectrics, but
capacitors greater than 1µF are not typically required for
AAT3169 applications.
The AAT3169 operates at a fixed frequency of approxi-
matelyꢀ1MHzꢀtoꢀcontrolꢀnoiseꢀandꢀlimitꢀharmonicsꢀthatꢀ
can interfere with the RF operation of cellular telephone
handsets or other communication devices. Back-injected
noise appearing on the input pin of the charge pump is
20mV peak-to-peak, typically ten times less than induc-
tor-based DC/DC boost converter white LED backlight
solutions. The AAT3169 soft-start feature prevents noise
transient effects associated with inrush currents during
start-up of the charge pump circuit.
Capacitor area is another contributor to ESR. Capacitors
that are physically large will have a lower ESR when
compared to an equivalent material smaller capacitor.
These larger devices can improve circuit transient
response when compared to an equal value capacitor in
a smaller package size.
Capacitor Selection
Careful selection of the four external capacitors (CIN, C1,
C2, and COUT) is important because they will affect turn-
on time, output ripple, and transient performance.
Optimum performance will be obtained when low ESR
ceramic capacitors are used; in general, low ESR may be
defined as less than 100mW. A value of 1µF for all four
capacitors is a good starting point when choosing capac-
itors. If the LED current sources are programmed only
for light current levels, then the capacitor size may be
decreased.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
DC-
DC+
J1
JP8
DC+
U1
1
2
3
4
5
6
7
14
13
12
11
10
9
D5
D4
D6
D3
D2
EN/SET
C1+
D1
C1
C1-
GND
IN
1µF
JP1
JP2
JP3
D3
JP4
JP5
D5
JP6
D6
OUTCP
C2+
8
C4
1µF
C2-
C3
1µF
AAT3169-STDFN33-14
D2
D4
D1
C2
C2
1uF
1µF
JP7
R7
220
J2
R6
100K
DC+
C5
10µF
R3 R2 R1
1K 1K 1K
U2
R5
1
2
3
4
8
7
6
5
VR4
POT10K
1.5K
VDD
GP5
GP4
GP3
VSS
GP0
GP1
GP2
CYCLE
UP
LED2
RED
0
0
0
12
SW3
34
5
SW2
PIC12F675
R8
12
34
5
1.5K
DOWN
SW1
12
34
5
LED1
GRN
Figure 1: AAT3169IFO Evaluation Board Schematic.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
DC-
DC+
J1
JP8
DC+
U1
AAT3169
1
2
3
4
12
11
10
9
D6
D1
GND
IN
ENSET
NC
OUTCP
GND
JPx
C4
C3
1µF
1µF
(QFN44-16)
GND
GND
C1
1µF
D2
D3
D4
D1
D5
D6
JP7
C2
1µF
R7
220
J2
R6
100K
DC+
GND
R3 R2 R1
1K 1K 1K
U2
PIC12F675
C5
R5
1
2
3
4
8
7
6
5
VR4
POT10K
10µF 1.5k
VDD VSS
GP5 GP0
GP4 GP1
GP3 GP2
CYCLE
UP
LED7
RED
0
0
0
12
34
5
SW3
SW2
R8
12
34
5
GND
1.5k
GND
DOWN
SW1
12
34
5
LED0
GRN
GND
GND
Figure 2: AAT3169ISN Evaluation Board Schematic.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
DC+
DC-
J1
JP8
DC+
GND
U1
TSOPJW14
1
2
3
4
5
6
7
14
13
12
11
10
9
D4
D5
D6
D3
D2
EN/SET
C1+
D1
GND
IN
C1-
C1
1µF
IN
OUTCP
C2+
JPx
D1
8
C2-
C4
1µF
C3
1µF
AAT3169
JP7
C2
1µF
D5
D4
D3
D6
D2
GND
GND
GND
R7
220
J2
R6
100K
GND
DC+
R3 R2 R1
1K 1K 1K
U2
PIC12F675
C5
R5
VR4
POT10K
10µF 1.5k
1
2
3
4
8
7
6
5
VDD
GP5
GP4
GP3
VSS
GP0
GP1
GP2
CYCLE
UP
LED7
RED
0
0
0
1 2
3 4
5
SW3
SW2
R8
1 2
3 4
5
1.5k
DOWN
GND
SW1
GND
1 2
3 4
5
LED0
GRN
GND
GND
Figure 3: AAT3169ITO Evaluation Board Schematic.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Figure 4: AAT3169IFO Evaluation Board
Top Side Layout.
Figure 5: AAT3169IFO Evaluation Board
Bottom Side Layout.
Figure 6: AAT3169ISN Evaluation Board
Top Side Layout.
Figure 7: AAT3169ISN Evaluation Board
Bottom Side Layout.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Figure 8: AAT3169ITO Evaluation Board
Top Side Layout.
Figure 9: AAT3169ITO Evaluation Board
Bottom Side Layout.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Ordering Information
Package
Marking1
Part Number (Tape and Reel)2
STDFN33-14
QFN44-16
TSOPJW-14
TDFN33-14
UNXYY
RVXYY
7LXYY
7ZXYY
AAT3169IFO-T1
AAT3169ISN-T1
AAT3169ITO-T1
AAT3169IWO-T1
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
Package Information3
TDFN33-14
Detail "A"
Index Area
1.650 0.050
3.000 0.050
Top View
Bottom View
0.425 0.050
+ 0.100
0.000
- 0.000
Pin 1 Indicator
(Optional)
Side View
Detail "A"
All dimensions in millimeters.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
3. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing
process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection.
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
STDFN33-14
Detail "A"
Index Area
1.700 ± 0.050
3.000 ± 0.050
Top View
Bottom View
0.425 ± 0.050
R0.2
0.025 ± 0.025
Pin 1 Indicator
Side View
(Optional)
Detail "A"
QFN44-16
2.400 0.050
Pin 1 Identification
0.330 0.075
16
Pin 1 Dot By Marking
13
1
4
C0.3
9
8
5
4.000 0.050
2.280 REF
Top View
Bottom View
0.214 0.036
Side View
All dimensions in millimeters.
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•
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DATA SHEET
AAT3169
AAT3169 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
TSOPJW-14
+ 0.10
0.20
- 0.05
0.40 BSC
Top View
0.04 REF
+ 0.05
3.05
- 0.10
4° 4°
0.45 0.15
+ 0.05
0.05
- 0.04
2.75 0.25
Side View
End View
All dimensions in millimeters.
Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved.
Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a
service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Sky-
works may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no
responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes.
No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided here-
under, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale.
THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR
PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES
NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, IN-
CLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM
THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or en-
vironmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper
use or sale.
Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of pub-
lished parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product
design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters.
Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for
identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference.
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