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Datasheet LTC3209-2 PDF ( 特性, スペック, ピン接続図 )

部品番号 LTC3209-2
部品説明 600mA Main/Camera LED Controller
メーカ Linear Technology
ロゴ Linear Technology ロゴ 
プレビュー
Total 20 pages
		
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LTC3209-2 Datasheet, LTC3209-2 PDF,ピン配置, 機能
FEATURES
Multimode Charge Pump Provides Up to 94%
Efficiency (1x, 1.5x, 2x)
Up to 600mA Total Output Current
LTC3209-1: 8 Current Sources Available as
6 × 25mA MAIN, 1 × 400mA CAM and 1 × 15mA AUX
LTC3209-2: 8 Current Sources Available as
5 × 25mA MAIN, 2 × 200mA CAM and 1 × 15mA AUX
www.DLatEaDShOeent/4OUf.fcoamnd Brightness Level Programmable
Using 2-Wire I2CTM Interface
Automatic Charge Pump Mode Switching or Fixed
Mode for Power Supply Generation
Low Noise Constant Frequency Operation*
Internal Soft-Start Limits Inrush Current During
Start-up and Mode Switching
Short Circuit/Thermal/Open-Shorted LED Protection
256 Brightness States for MAIN Display
16 Brightness States for CAM Display
4 Brightness States for AUX Display
20-Lead (4mm × 4mm) QFN Package
U
APPLICATIO S
Video/Camera Phones with QVGA+ Displays
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Protected by U.S. Patents, including 6411531
LTC3209-1/LTC3209-2
600mA Main/Camera
LED Controller
DESCRIPTIO
The LTC®3209-1/LTC3209-2 are highly integrated
multidisplay LED controllers. These parts contain a high
efficiency, low noise charge pump to provide power to
MAIN, CAM and AUX LED displays. The LTC3209-1/
LTC3209-2 require only four small ceramic capacitors
and one current set resistor to form a complete LED power
supply and current controller.
The maximum display currents are set by a single external
resistor. Current for each LED is controlled by a precision
internal current source. Dimming and On/Off for all dis-
plays is achieved via the I2C serial interface. 256 states are
available for the MAIN display. Sixteen states are available
for the CAM display and four states are available for the
AUX display.
The charge pump optimizes efficiency based on the
voltage across the LED current sources. The part powers
up in 1x mode and will automatically switch to boost mode
whenever any enabled MAIN or CAM LED current source
begins to enter dropout. The first dropout switches the
part into 1.5x mode and a subsequent dropout switches
the part into 2x mode. The part resets to 1x mode
whenever a data bit is updated via the I2C port. The parts
are available in a 4mm × 4mm 20-lead QFN package.
TYPICAL APPLICATIO
LTC3209-1 6 MAIN/1 CAM Operation
LTC3209-2 5 MAIN/2 CAM Operation
2.2µF 2.2µF
2.2µF 2.2µF
VBAT
2.2µF
C1P C1M C2P C2M 2.2µF
VBAT1,2
CPO
I2C
LOW HI
LTC3209-1
SCL
SDA
CAMHL
RREF
6
MAIN1-6
CAM
AUX
GND
24.3k
MAIN
CAM
RED
3209 TA01
VBAT
2.2µF
C1P C1M C2P C2M 2.2µF
VBAT1,2
CPO
LTC3209-2
SCL
I2C
SDA
LOW HI
CAMHL
RREF
24.3k
5
MAIN1-5
2
CAM
AUX
GND
MAIN
CAM
RED
3209 TA02
320912fa
1

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LTC3209-2 pdf, ピン配列
LTC3209-1/LTC3209-2
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBAT1,2 = 3.6V, DVCC = 3V, RREF = 24.3k, C1 = C2 = C3 = C4 = 2.2µF,
unless otherwise noted.
PARAMETER
White LED Current (MAIN1-6), 8-Bit Linear DAC
CONDITIONS
MIN TYP MAX UNITS
Full-Scale LED Current
MAIN = 1V
Minimum (1LSB) LED Current
MAIN = 1V
LED Current Matching
Any Two MAIN Outputs at 50% FS
LED Dropout Voltage
Mode Switch Threshold, IMAINx = FS
White LED Current (CAM), LTC3209-1, 4-Bit Linear DAC
25 28 31
110
1
180
mA
µA
%
mV
Full-Scale LED Current
Minimum (1LSB) LED Current
CAM = 1V
CAM = 1V
360 400 440
26.8
mA
mA
wwwL.EDDaDtaroSphoeuet tV4oUlt.acgoem
Mode Switch Threshold, ICAM = FS
White LED Current (CAM1-2), LTC3209-2, 4-Bit Linear DAC
400 mV
Full-Scale LED Current
Minimum (1LSB) LED Current
CAM = 1V
CAM = 1V
180 200 220
13.3
mA
mA
LED Current Matching
CAM1-2 at 50% FS
1%
LED Dropout Voltage
AUX LED Current, 2-Bit Linear DAC
Mode Switch Threshold, ICAM = FS
400 mV
Full-Scale LED Current
Minimum (1LSB) LED Current
AUX = 1V
AUX = 1V
12.5 13.75
4.4
15
mA
mA
VOL
Charge Pump (CPO)
IAUX = 1mA; C0, C1 = High
18 mV
1x Mode Output Impedance
1.5x Mode Output Impedance
2x Mode Output Impedance
CPO Voltage Regulation
CLOCK Frequency
VBAT = 3V, VCPO = 4.2V (Note 3)
VBAT = 3V, VCPO = 4.8V (Note 3)
1.5x Mode, ICPO = 2mA
2x Mode, ICPO = 2mA
0.5
2.7
3.2
4.6 V
5.1 V
0.85 MHz
SDA, SCL, CAMHL
VIL (Low Level Input Voltage)
VIH (High Level Input Voltage)
VOL, Digital Output Low (SDA)
IIH
IIL
Serial Port Timing (Notes 6, 7)
IPULLUP = 3mA
SDA, SCL, CAMHL = DVCC
SDA, SCL, CAMHL = 0V
0.7 DVCC
0.3 DVCC
0.16 0.4
–1
1
–1
1
V
V
V
µA
µA
tSCL
tBUF
tHD,STA
tSU,STA
tSU,STO
tHD,DAT(OUT)
tHD,DAT(IN)
tSU,DAT
tLOW
tHIGH
tf
tr
Clock Operating Frequency
Bus Free Time Between Stop and Start Condition
Hold Time After (Repeated) Start Condition
Repeated Start Condition Setup Time
Stop Condition Setup Time
Data Hold Time
Input Data Hold Time
Data Setup Time
Clock Low Period
Clock High Period
Clock Data Fall Time
Clock Data Rise Time
1.3
0.6
0.6
0.6
0
0
100
1.3
0.6
20
20
400 kHz
µs
µs
µs
µs
900 ns
ns
ns
µs
µs
300 ns
300 ns
320912fa
3


3Pages


LTC3209-2 電子部品, 半導体
LTC3209-1/LTC3209-2
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted
LTC3209-1 CAM Pin Dropout
Voltage vs CAM Pin Current
400
VBAT = 3.6V
360
320
280
220
200
160
120
www.Da80taSheet4U.com
40
0
0 100 200 300 400
CAM PIN CURRENT (mA)
3209 G24
LTC3209-2 CAM Pin Dropout
Voltage vs CAM Pin Current
400
VBAT = 3.6V
360
320
280
220
200
160
120
80
40
0
0 50 100 150 200
CAM PIN CURRENT (mA)
3209 G24
MAIN Pin Dropout Voltage
vs MAIN Pin Current
200 VBAT = 3.6V
180
160
140
120
100
80
60
40
20
0
0 5 10 15 20 25 30
MAIN PIN CURRENT (mA)
3209 G27
LTC3209-2 CAM Pin Current
vs CAM Pin Voltage
200
VBAT = 3.6V
160
120
80
40
0
0 0.2 0.4 0.6 0.8 1.0
CAM PIN VOLTAGE (V)
3209 G16
MAIN Pin Current
vs MAIN Pin Voltage
30
25
20
15
10
5
VBAT = 3.6V
0
0 0.2 0.4 0.6 0.8 1.0
MAIN PIN VOLTAGE (V)
3209 G26
AUX Pin Current vs Input Code
16
VBAT = 3.6V
14 VAUX = 1V
12
10
8
6
4
2
0
0123
HEX CODE
3209 G20
6
LTC3209-2 CAM Pin Current
vs Input Code
200
VBAT = 3.6V
180
160
140
120
100
80
60
40
20
0
0123456789ABCDE F
HEX CODE
3209 G17
MAIN Pin Current vs Input Code
28
26 VBAT = 3.6V
24
22
20
18
16
14
12
10
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 A0 B0 C0D0 E0 F0 FF
HEX CODE
3209 G17
6-LED MAIN Display Efficiency
vs VBAT
100
90
80
70
60
50
40
30
20
10 6 LEDS AT 15mA/LED
(TYP VF AT 15mA = 3.2V)
0
3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4
VBAT (V)
3209 G21
320912fa

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