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参数资料
| 型号： | LT3485EDD-0#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| 封装： | 3 X 3 MM, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件页数： | 1/20页 |
| 文件大小： | 339K |
| 代理商： | LT3485EDD-0#TR |
LT3485-0/LT3485-1/
LT3485-2/LT3485-3
1
34850123fb
FEATURES
DESCRIPTIO
U
Photoflash Capacitor
Chargers with Output Voltage
Monitor and Integrated IGBT Drive
TYPICAL APPLICATIO
U
■
Integrated IGBT Driver
■ Voltage Output Monitor
■ Uses Small Transformers: 5.8mm
× 5.8mm × 3mm
■
Operates from Two AA Batteries, Single Cell Li-Ion
or Any Supply from 1.8V up to 10V
■ No Output Voltage Divider Needed
■
No External Schottky Diode Required
■ Charges Any Size Photoflash Capacitor
■ Available in 10-Lead (3mm
× 3mm) DFN
APPLICATIO S
U
■ Digital Camera and Cell Phone Flash Charger
The LT
3485 family of photoflash chargers are highly inte-
grated ICs containing complete charger and IGBT drive
functions. The patented control technique of the LT3485-x
allows it to use extremely small transformers. Output voltage
detection requires no external circuitry. The turns ratio of the
transformer controls the final charge voltage. While charging,
the output voltage on the capacitor may be monitored by a
microcontrollerfromthemonitorpin.Eachdevicecontainsan
on-chip high voltage NPN power switch, which can withstand
negative voltages on the switch pin without an external
Schottky diode. The device features a VBAT pin, which allows
the use of two AA cells to charge the capacitor. The internal
circuitry operates from the VIN pin. The LT3485-0 has a
primarycurrentlimitof1.4A,whereastheLT3485-3,LT3485-2,
and LT3485-1 have current limits of 2A, 1A and 0.7A respec-
tively. These different current limits result in tightly controlled
input currents.
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 LT3485
series of parts are housed in a leadless (3mm
× 3mm) DFN
package.
Fast Charge Time
VERSION
INPUT CURRENT (mA)
CHARGE TIME (sec)
LT3485-3
750
2.5
LT3485-0
500
3.7
LT3485-2
350
5.5
LT3485-1
225
4.0*
VIN = VBAT = 3.6V
100
F capacitor, 320V. *50F capacitor
LT3485-0
IGBTOUT
IGBTIN
VIN
IGBTPWR
GND
VMONT
VBAT
SW
4.7
F
1:10.2
VBAT
2 AA OR
1 TO 2 Li-Ion
0.22
F
VCC
5V
320V
TO
MICRO
1
T
C
A
2
3
1
2
4
5
3485 TA01
150
F
PHOTOFLASH
CAPACITOR
2.2
F
600V
1M
CHARGE
DONE
TRIGGER
FLASHLAMP
IGBT
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6636021.
LT3485-0 Charging Waveform
LT3485-0 Photoflash Charger Uses High Efficiency 3mm Tall Transformers
DANGER HIGH VOLTAGE – OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
VIN = 3.6V
COUT = 100F
VOUT
50V/DIV
AVERAGE
INPUT CURRENT
0.5A/DIV
1s/DIV
3485 TA02
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3485EDD-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 |
| LT3485EDD-1#PBF | 功能描述:IC CHARGER PHOTOFLASH 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LT3485EDD-1#TRPBF | 功能描述:IC CHARGER PHOTOFLASH 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LT3485EDD-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 |
| LT3485EDD-2#PBF | 功能描述:IC CHARGER PHOTOFLASH 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
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