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參數(shù)資料
| 型號： | LT1932ES6#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.78 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | PLASTIC, SOT-23, 6 PIN |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 241K |
| 代理商： | LT1932ES6#TR |
1
LT1932
1932f
Constant-Current DC/DC
LED Driver in ThinSOT
The LT
1932 is a fixed frequency step-up DC/DC converter
designed to operate as a constant-current source. Be-
cause it directly regulates output current, the LT1932 is
ideal for driving light emitting diodes (LEDs) whose light
intensity is proportional to the current passing through
them, not the voltage across their terminals.
With an input voltage range of 1V to 10V, the device works
from a variety of input sources. The LT1932 accurately
regulates LED current even when the input voltage is
higher than the LED voltage, greatly simplifying battery-
powered designs. A single external resistor sets LED
current between 5mA and 40mA, which can then be easily
adjusted using either a DC voltage or a pulse width
modulated (PWM) signal. When the LT1932 is placed in
shutdown, the LEDs are disconnected from the output,
ensuring a quiescent current of under 1
A for the entire
circuit. The device’s 1.2MHz switching frequency permits
the use of tiny, low profile chip inductors and capacitors to
minimize footprint and cost in space-conscious portable
applications.
s
Up to 80% Efficiency
s
Inherently Matched LED Current
s
Adjustable Control of LED Current
s
Drives Five White LEDs from 2V
s
Drives Six White LEDs from 2.7V
s
Drives Eight White LEDs from 3V
s
Disconnects LEDs In Shutdown
s
1.2MHz Fixed Frequency Switching
s
Uses Tiny Ceramic Capacitors
s
Uses Tiny 1mm-Tall Inductors
s
Regulates Current Even When VIN > VOUT
s
Operates with VIN as Low as 1V
s
Low Profile (1mm) ThinSOT
TM Package
s
Cellular Telephones
s
Handheld Computers
s
Digital Cameras
s
Portable MP3 Players
s
Pagers
Li-Ion Driver for Four White LEDs
Efficiency
, LTC and LT are registered trademarks of Linear Technology Corporation.
VIN
SW
D1
15mA
1932 TA01
L1
6.8
H
VIN
2.7V TO 4.2V
LT1932
SHDN
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN EMK212BJ105
D1:ZETEX ZHCS400
L1: SUMIDA CLQ4D106R8 OR PANASONIC ELJEA6R8
61
4
RSET
1.50k
PWM
DIMMING
CONTROL
C1
4.7
F
C2
1
F
2
3
5
LED
RSET
GND
LED CURRENT (mA)
0
55
EFFICIENCY
(%)
60
65
70
75
80
85
510
15
20
1932 TA02
VIN = 4.2V
VIN = 2.7V
ThinSOT is a trademark of Linear Technology Corporation.
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1932ES6TRMPBF | 制造商:Linear Technology 功能描述:LED Driver 8-Seg 1.8/2.5/3.3/5/9V TSOT23 |
| LT1933 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.4A, 500kHz Step-Down Switching Regulator |
| LT1933_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:600mA, 500kHz Step-Down Switching Regulator in SOT-23 and DFN Packages |
| LT1933ES6 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 3.6V to 36V 6-Pin TSOT-23 |
| LT1933ES6#PBF | 制造商:Linear Technology 功能描述:IC STEP-DOWN REGULATOR 6-TSOT-23 |
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