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參數(shù)資料
| 型號： | LT303EMSE#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.55 A FLUORESCENT LIGHT CONTROLLER, PDSO10 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 211K |
| 代理商： | LT303EMSE#TRPBF |
LT3003
4
3003fa
PIN FUNCTIONS
TYPICAL PERFORMANCE CHARACTERISTICS
LED1 (Pin 1): Controlled current input for a string of LEDs
with a cathode lead connected to the pin. Connect the rst
string of LEDs to this pin.
LED2 (Pin 2): Controlled current input for a string of LEDs
with a cathode lead connected to the pin. Connect the sec-
ond string of LEDs to this pin.
LED3 (Pin 3): Controlled current input for a string of LEDs
with a cathode lead connected to the pin. Connect the third
string of LEDs to this pin.
VMAX (Pin 4):
Boost: Connect to VOUT
Buck Mode: Connect to Input Supply
Buck-Boost Mode: Connect to VOUT
VIN (Pin 5): Input Supply, Upper Rail. This pin must be
locally bypassed with a capacitor to ground. VIN powers
the internal control circuitry.
Boost: Connect to Input Supply
Buck Mode: Connect to Input Supply
Buck-Boost Mode: Connect to VOUT
PWM (Pin 6): Input Pin for PWM Dimming Control. A
PWM signal above 0.5V (on threshold) turns the LT3003
channels on. A PWM signal below 0.5V completely discon-
nects each LED string. If the application does not require
PWM dimming, then the PWM pin can be left either open
(an internal 10A source current pulls PWM high) or it
can be connected to a supply between 0.5V to 15V.
OT1 (Pin 7): Overtemperature Output. OT1 pulls 100A
from the pin when the junction temperature exceeds
125°C. The part has to cool down by 6°C for the ag to
reset; ideal for providing an overtemperature ag to the
system microprocessor.
OT2 (Pin 8): Overtemperature Output. OT2 Pulls 300A
from the pin when the junction temperature exceeds
125°C. The part has to cool down by 6°C for the ag to
reset; ideal for connecting to the switching regulator gm
error amplier output to defeat switching.
SHDN (Pin 9): Micropower Shutdown Pin. Below 0.7V
shuts down the IC. Typically IVIN = 4A for SHDN = 0V.
Boost: Connect to System Shutdown Signal or VIN
Buck Mode: Connect to System Shutdown Signal
or VIN
Buck-Boost Mode: If PWM dimming, connect to PWM
(Pin 6); if no PWM dimming, connect to system shut-
down signal or VIN
VIN Quiescent Current vs ILED
VIN Shutdown Current vs VIN
ILED (mA)
50
35
30
25
20
15
10
5
0
200
300
3003 G07
100
150
250
350
V
IN
QUIESCENT
CURRENT
(mA)
VIN (V)
3
V
IN
SHUTDOWN
CURRENT
(
A)
8
12
3003 G08
4
0
13
23
33
8
18
28
38
16
6
10
2
14
SHDN = 0
TA = 25°C unless otherwise noted.
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