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參數(shù)資料
| 型號： | LQH2MCN100K02 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN |
| 中文描述： | 20mA的LED驅(qū)動器和3毫米的OLED驅(qū)動器集成肖特基x 2mm DFN封裝 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 449K |
| 代理商： | LQH2MCN100K02 |
LT3498
6
3498f
TYPICAL PERFORMANCE CHARACTERISTICS
LED Switching Waveforms
LED Transient Response
OLED Switching Waveforms
with No Load
OLED Switching Waveforms
with 4mA Load
OLED Switching Waveforms
with 35mA Load
OLED Switching Waveforms
During Start-Up
PIN FUNCTIONS
LED1 (Pin 1):
Connection Point Between the Anode of the
Highest LED and the Sense Resistor. The LED current can
be programmed by:
mV
R
SENSE
1
CTRL1 (Pin 2):
Dimming and Shutdown Pin. Connect this
pin below 75mV to disable the white LED driver. As the
pin voltage is ramped from 0V to 1.5V, the LED current
ramps from 0 to (I
LED1
= 200mV / R
SENSE1
).
GND1, 2 (Pins 3, 4):
Ground. Tie directly to local ground
plane. GND1 and GND2 are connected internally.
I
LED
1
200
=
CTRL2 (Pin 5):
Dimming and Shutdown Pin. Connect it
below 75mV to disable the low noise boost converter.
As the pin voltage is ramped from 0V to 1.5V, the output
ramps up to the programmed output voltage.
FB2 (Pin 6):
Feedback Pin. Reference voltage is 1.215V.
There is an internal 182k
Ω
resistor from FB2 to GND. To
achieve desired output voltage, choose R
FB2
according to
the following formula:
V
FB
2
182
1 215
.
R
k
OUT
2
1
=
T
A
= 25°C, unless otherwise specified.
500
ns
/DIV
V
W
10V/DIV
V
50mV/DIV
I
L
100mA/
DIV
349
8
G19
V
= 3.6V
FRONT PAGE APPLICATION
1m
s
/DIV
V
5V/DIV
V
5V/DIV
I
L
200mA/
DIV
349
8
G20
V
= 3.6V
FRONT PAGE APPLICATION
5
μ
s
/DIV
V
OUT2
10mV/DIV
AC COUPLED
S
W2 VOLTAGE
10V/DIV
INDUCTOR
CURRENT
50mA/DIV
349
8
G21
V
IN
= 3.6V
V
OUT2
= 16V
349
8
G22
2
μ
s
/DIV
V
10mV/DIV
AC
COUPLED
S
W2
VOLTAGE
10V/DIV
INDUCTOR
CURRENT
200mA/DIV
V
IN
= 3.6V
V
OUT2
= 16V
349
8
G23
500
ns
/DIV
S
W2
VOLTAGE
10V/DIV
V
10mV/DIV
AC COUPLED
INDUCTOR
CURRENT
200mA/DIV
V
IN
= 3.6V
V
OUT2
= 16V
349
8
G24
500
μ
s
/DIV
V
VOLTAGE
5V/DIV
CAP2
VOLTAGE
5V/DIV
INDUCTOR
CURRENT
100mA/DIV
V
IN
= 3.6V
V
OUT2
= 16V
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