white LED driver capable of driving one to three LEDs up
to 30mA, each. It automatically switches between 1x
mode and 2x mode to maintain the highest efficiency
and optimal LED current accuracy and matching.
The AAT3193 charge pump’s 1x mode (bypass mode)
has very low resistance allowing LED current regulation
to be maintained with input supply voltage approaching
the LED forward voltage.
The AAT3193 is available in a 2x2mm, 10-lead SC70JW-10
package.
•
•
•
•
•
•
Applications
•
•
•
•
Entry
Entry
Entry
Entry
Level
Level
Level
Level
Cordless Phone Handsets
Digital Cameras
Mobile Phone Handsets
MP3 and PMP Players
Typical Application
Input Voltage
2.7V to 5.5V
C
IN
1μF
IN
C+
OUT
C
P
1μF
AAT3193-1
C-
C
OUT
1μF
WLEDs
OSRAM LW M 678
or equivalent
EN/SET
S
2
Cwire
Interface
EN/SET
D1
D2
RSET
GND
D3
R
SET
14.3kΩ
3193.2008.02.1.2
www.analogictech.com
1
PRODUCT DATASHEET
AAT3193
ChargePump
TM
3-Channel Charge-Pump LED Driver
Pin Descriptions
Pin
1
2
3
4
5
Symbol
D1
OUT
C-
C+
IN
EN/SET
(AAT3193-1/-2/-3)
Description
LED1 current sink input. D1 is the input of LED1 current sink. Connect LED1’s anode to OUT and its
cathode to D1.
Charge pump output. OUT is the output of the charge pump. Bypass OUT to GND with a 1μF or
larger ceramic capacitor.
Charge pump capacitor negative node.
Charge pump capacitor positive node. Connect a 1μF ceramic capacitor between C+ and C-.
Power source input. Connect IN to the power source, typically the battery. Bypass IN to GND with a
1μF or larger ceramic capacitor.
LED enable and serial control input. EN/SET is the ON/OFF control for the LED and the S
2
Cwire digital
input for the AAT3193-1/-2/-3 to control serially the LED brightness according to the maximum cur-
rent set by R
SET
.
LED ON/OFF and PWM control input. This logic input controls the LED outputs for the AAT3193-4.
Alternatively, a PWM signal from a GPIO or an equivalent signal from a separate controller can be
used to control LED output current linearly. A PWM signal, ranging from 10% to 100% duty cycle,
controls the LED current linearly between ZS and FS.
A 1% tolerance resistor from this pin to GND sets the maximum LED current level. For optimal LED
output current accuracy and matching in the AAT3193-1/-2/-4, a 14.3kΩ resistor sets each full-scale
output current to 20mA, maximum. For the AAT3193-3, a 11.5kΩ resistor is recommended.
Ground. Connect this pin to the system’s ground plane.
LED3 Current Sink Input. D3 is the input of LED3 current sink. Connect LED3’s anode to OUT and its
cathode to D3.
LED2 Current Sink Input. D2 is the input of LED2 current sink. Connect LED2’s anode to OUT and its
cathode to D2.
6
EN/PWM
(AAT3193-4)
7
8
9
10
RSET
GND
D3
D2
Pin Configuration
SC70JW-10
(Top View)
D1
OUT
C-
C+
IN
1
2
3
4
5
10
9
8
7
6
D2
D3
GND
RSET
EN/SET
2
www.analogictech.com
3193.2008.02.1.2
PRODUCT DATASHEET
AAT3193
ChargePump
TM
3-Channel Charge-Pump LED Driver
Part Number Descriptions
Part Number
AAT3193IJQ-1
AAT3193IJQ-2
AAT3193IJQ-3
AAT3193IJQ-4
Interface
S
2
Cwire
S
2
Cwire
S2Cwire
PWM
Current Control, Inverting
16-step
8-step
4-step
Linear
Absolute Maximum Ratings
1
Symbol
Description
IN, C+, C-, OUT, D1, D2, D3, and RSET Pin Voltages to GND
EN/SET or EN/PWM Pin Voltage to GND
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Value
-0.3 to 6.0
-0.3 to V
IN
+ 0.3
-40 to 150
300
Units
V
V
°C
°C
Thermal Information
Symbol
P
D
θ
JA
Description
Maximum Power Dissipation
2, 3
Maximum Thermal Resistance
2
Value
625
160
Units
mW
°C/W
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.
1. The AAT3193 is guaranteed to meet performance specification over the -40°C to 85°C operating temperature range and is assured by design, characterization and correlation
with statistical process controls.
4
www.analogictech.com
3193.2008.02.1.2
PRODUCT DATASHEET
AAT3193
ChargePump
TM
3-Channel Charge-Pump LED Driver
Electrical Characteristics1
IN = EN = 3.6V; C
IN
= 1μF; C
OUT
= 1μF; C
CP
= 1μF; R
SET
= 14.3kΩ; T
A
=-40°C to 85°C unless otherwise noted. Typical
values are at T
A
= 25°C.
Symbol
Description
Conditions
R
SET
= 11.5kΩ; DATA = 1; V
IN
- V
F
= 1.5V
R
SET
= 11.5kΩ; DATA = 1; V
IN
- V
F
= 1.5V
R
SET
= 11.5kΩ; DATA = 4; V
IN
- V
F
= 1.5V
R
SET
= 11.5kΩ; I
D1
= I
D2
= I
D3
= 20mA
1.4
EN/SET = IN = 5V
-1
0.4
1
500
500
75
50
75
1.4
EN/PWM = IN = 5V
-1
2
0.15
Duty Cycle = 80%
1
50
0.4
1
Min
18
0.72
Typ
20
±3
0.9
125
Max
22
1.1
Units
mA
%
mA
mV
V
V
μA
μs
μs
μs
ns
μs
V
V
μA
μs
ms
kHz
AAT3193-3: LED Current Sink Outputs
I
D_(MAX)
D1 - D3 Current Accuracy
ΔI
D_(MAX)
D1 - D3 Current Matching
I
D_(DATA4)
D1 - D3 Current Accuracy
D1- D3 Charge Pump Mode Transition
V
D_(TH)
Threshold
AAT3193-1/-2/-3: EN/SET and S
2
Cwire Control
EN Input High Threshold Voltage
V
ENH
V
ENL
EN Input Low Threshold Voltage
I
EN(LKG)
EN Input Leakage Current
t
EN/SET(OFF)
EN/SET Input OFF Timeout
t
EN/SET(LAT)
EN/SET Input Latch Timeout
t
EN/SET(LOW)
EN/SET Input LOW Time
t
ENSET(H-MIN)
EN/SET Minimum High Time
t
ENSET(H-MAX)
EN/SET Maximum High Time
AAT3193-4: EN/PWM Current Control
V
ENH
EN/PWM Input High Threshold Voltage
EN/PWM Input Low Threshold Voltage
V
ENL
I
EN(LKG)
EN/PWM Input Leakage Current
t
PWM(ON)
PWM Control Turn-on Delay
t
EN/PWM
EN/PWM Input OFF Timeout
f
PWM
PWM Control Frequency
0.3
1. The AAT3193 is guaranteed to meet performance specification over the -40°C to 85°C operating temperature range and is assured by design, characterization and correlation
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