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参数资料
| 型号： | LT3484EDCB-2#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO6 |
| 封装： | 2 X 3 MM, LEAD FREE, PLASTIC, MO-229TBD, DFN-6 |
| 文件页数： | 1/12页 |
| 文件大小： | 446K |
| 代理商： | LT3484EDCB-2#PBF |
LT3484-0/LT3484-1/LT3484-2
1
3484012f
The LT
3484 family of photoflash capacitor charger ICs is
designed for use in digital camera and mobile phone
applications where space is at a premium. The LT3484’s
patented control technique allows it to use extremely small
transformers, and the improved NPN power switch re-
quires no external Schottky diode clamp, reducing solu-
tion size. Output voltage detection requires no external
circuitry as the transformer turns ratio determines final
charge voltage.
The devices feature a VBAT pin, which allows the use of 2
alkaline cells to charge the capacitor. The LT3484-0, -2
and -1 have primary current limits of 1.4A, 1A and 0.7A
respectively, resulting in tightly controlled average input
current of 500mA, 350mA and 225mA respectively. The
three versions are otherwise identical.
The CHARGE pin gives full control of the part to the user.
Driving CHARGE low puts the part in shutdown. The DONE
pin indicates when the part has completed charging. The
LT3484 series of parts are housed in a tiny low profile
2mm
× 3mm DFN package.
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
■ Digital Camera and Cell Phone Flash Charger
■ Highly Integrated IC in 2mm
× 3mm DFN Package
Reduces Solution Size
■
Uses Small Transformers:
5.8mm
× 5.8mm × 3mm
■ Fast Photoflash Charge Times:
4.6s for LT3484-0 (0V to 320V, 100
F, VIN = 3.6V)
5.7s for LT3484-2 (0V to 320V, 100
F, VIN = 3.6V)
5.5s for LT3484-1 (0V to 320V, 50
F, VIN = 3.6V)
■
Operates from Two AA Batteries, or Any Supply from
1.8V up to 16V
■ Controlled Average Input Current
500mA (LT3484-0)
350mA (LT3484-2)
225mA (LT3484-1)
■
No Output Voltage Divider Needed
■ No External Schottky Diode Required
■ Charges Any Size Photoflash Capacitor
■
Available in 6-Lead 2mm
× 3mm DFN Package
Photoflash Capacitor
Chargers
DANGER HIGH VOLTAGE – OPERATION BY HIGH VOLTAGE
TRAINED PERSONNEL ONLY
LT3484-0 Photoflash Charger Uses
High Efficiency 3mm Tall Transformers
LT3484-0
CHARGE
VIN
GND
VBAT
SW
+
DONE
4.7
F
100k
1:10.2
VBAT
2AA OR
1 TO 2 Li-Ion
0.1
F
VCC
5V
320V
1
2
4
5
348412 TA01
150
F
PHOTOFLASH
CAPACITOR
LT3484-0 Charging Waveform
TYPICAL APPLICATIO
U
3484 TA02
1s/DIV
VOUT
50V/DIV
AVERAGE
INPUT
CURRENT
1A/DIV
VIN = 3.6V
COUT = 100F
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents
including 6636021.
相关PDF资料 |
PDF描述 |
|---|---|
| LT3484EDCB-1#PBF | SPECIALTY ANALOG CIRCUIT, PDSO6 |
| LT3493EDCB#PBF | 2.2 A SWITCHING REGULATOR, 815 kHz SWITCHING FREQ-MAX, PDSO6 |
| LT3493IDCB#PBF | 2.2 A SWITCHING REGULATOR, 815 kHz SWITCHING FREQ-MAX, PDSO6 |
| LT3493EDCB#TRM | 2.2 A SWITCHING REGULATOR, 815 kHz SWITCHING FREQ-MAX, PDSO6 |
| LT3493EDCB#TR | 2.2 A SWITCHING REGULATOR, 815 kHz SWITCHING FREQ-MAX, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3485 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2-Cell Supercapacitor Charger |
| LT3485-0 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Photoflash Capacitor Chargers with Output Voltage Monitor and Integrated IGBT Drive |
| LT3485-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Photoflash Capacitor Chargers with Output Voltage Monitor and Integrated IGBT Drive |
| LT3485-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Photoflash Capacitor Chargers with Output Voltage Monitor and Integrated IGBT Drive |
| LT3485-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Photoflash Capacitor Chargers with Output Voltage Monitor and Integrated IGBT Drive |
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