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LM2759SDEV 데이터시트(PDF) 4 Page - Texas Instruments

부품명 LM2759SDEV
상세설명  1A Switched Capacitor Flash LED Driver with I2C Compatible Interface
PDF  22 Pages
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LM2759SDEV 데이터시트(HTML) 4 Page - Texas Instruments

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LM2759
SNVS577D – JUNE 2008 – REVISED MAY 2013
www.ti.com
Electrical Characteristics
(1) (2)
Limits in standard typeface are for TJ = 25°C. Limits in boldface type apply over the full operating junction temperature range
(-30°C
≤ TJ ≤ +125 °C). Unless otherwise noted, specifications apply to the LM2759 Typical Application Circuit (pg.1) with VIN
= 3.6V, VTX = 0V, VSTROBE = 0V, CIN = C1 = C2 = 2.2 µF, COUT = 4.7 µF.
(3)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
ILED
LED Current Sink Accuracy
Flash Mode
198
220
242
mA
ADDR xB0 = 0x02
−10%
+10%
IFLASH
Max Flash Output Current
Flash Mode
1
A
ADDR xB0 = 0x0F
VGDX
Gain Transition Voltage
ILED = 500mA
350
mV
Threshold on ISINK
(VISINK falling)
VOUT
Output Voltage
1x Mode, IOUT = 0 mA (VIN >VOUT)
(4)
4.7
4.9
1.5x Mode, IOUT = 0 mA
4.7
4.9
V
2x Mode, IOUT = 0 mA
5.1
5.4
ROUT
x1 Mode Output Impedance
IOUT = 200mA, VIN = 3.3V
0.33
Ω
1.5x Mode Output
IOUT = 500mA, VIN = 3.3V
1.9
Impedance
x2 Mode Output Impedance
2.25
FSW
Switching Frequency
2.7V
≤ VIN ≤ 5.5V
0.7
1
1.3
MHz
VIH
Input Logic High
Pins: TX, Strobe
1.26
V
VIL
Input Logic Low
Pins: TX, Strobe
0.7
V
IOUT = 0 mA, 1x Mode
0.6
0.9
IQ
Quiescent Current
IOUT = 0 mA, 1.5x Mode
3.4
4.0
mA
IOUT = 0 mA, 2x Mode
5.9
7.0
ISD
Shutdown Current
Device Disabled
5.8
9.7
µA
2.7V
≤ VIN ≤ 5.5V
I2C Compatible Interface Voltage Specifications (SCL, SDA)
VIL
Input Logic Low “0”
2.7V
≤ VIN ≤ 5.5V
0.72
V
VIH
Input Logic High “1'
2.7V
≤ VIN ≤ 5.5V
1.25
V
VOL
Output Logic Low “0”
ILOAD = 3 mA
300
mV
I2C Compatible Interface Timing Voltage Specifications (SCL, SDA)(5)
t1
SCL (Clock Period)
2.5
µs
t2
Data in Setup Time to SCL
100
ns
High
t3
Data Out Stable After SCL
0
ns
Low
t4
SDA Low Setup Time to
100
ns
SCL Low (Start)
t5
SDA High Hold Time After
100
ns
SCL High (Stop)
(1)
All voltages are with respect to the potential to the GND pin.
(2)
Min and Max limits are specified by design, test, or statistical analysis. Typical (Typ) numbers are not ensured, but do represent the
most likely norm. Unless otherwise specified, conditions for Typ specifications are: VIN = 3.6V and TA = 25°C.
(3)
CIN, COUT, C1, C2: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
(4)
For input voltage below the regulation target during the gain of 1x, the output voltage will typically be equal to the input voltage.
(5)
SCL and SDA should be glitch-free in order for proper brightness control to be realized.
4
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Product Folder Links: LM2759



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