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LT3585-1_15 PDF预览

LT3585-1_15

更新时间： 2022-02-26 11:30:48
品牌 Logo 应用领域
凌特 - Linear 双极性晶体管
页数 文件大小 规格书
20页 433K
描述
Photofl ash Chargers with Adjustable Input Current and IGBT Drivers

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LT3585-1_15 数据手册

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LT3585-0/LT3585-1  
LT3585-2/LT3585-3  
Photoflash Chargers with  
Adjustable Input Current  
and IGBT Drivers  
U
DESCRIPTIO  
FEATURES  
The LT®3585 series are highly integrated ICs designed to  
charge photoflash capacitors in digital and film cameras.  
A new control technique allows for the use of extremely  
small transformers. Each part contains an on-chip high  
voltage NPN power switch. Output voltage detection is  
completely contained within the part, eliminating the need  
for any discrete zener diodes or resistors. The output volt-  
age can be adjusted by simply changing the turns ratio  
of the transformer.  
■
Adjustable Input Current  
■
Integrated IGBT Driver  
■
No Output Voltage Divider Needed  
Uses Small Transformers: 5.8mm × 5.8mm × 3mm  
Fast Photoflash Charge Times  
Charges Any Size Photoflash Capacitor  
Supports Operation from Single Li-Ion Cell, Two AA  
Cells or any Supply from 1.5V Up to 16V  
■
■
■
■
■
Small 10-Lead (3mm × 2mm) DFN Package  
Fast Charge Time  
The CHRG/IADJ pin gives full control of the part to the  
user. Driving CHRG/IADJ low puts the part in low power  
shutdown. The CHRG/IADJ pin can also be used to reduce  
theinputcurrentofthecharger,usefulinextendingbattery  
life. The DONE pin indicates when the part has completed  
charging.  
NORMAL MODE REDUCED MODE  
INPUT  
CHARGE TIME  
(Sec)  
CHARGE TIME  
(Sec)  
VERSION  
LT3585-3  
LT3585-0  
LT3585-2  
LT3585-1*  
CURRENT (mA)  
800/400  
550/275  
400/200  
250/115  
3.3  
4.6  
5.8  
5.0  
6.6  
9.2  
12.6  
14.6  
The LT3585 series of parts are housed in tiny 3mm ×  
2mm DFN packages.  
100µF capacitor, 320V, V = V = 3.6V  
IN  
BAT  
*50µF capacitor, 320V, V = V = 3.6V  
IN  
BAT  
U
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
APPLICATIO S  
■
Digital/Film Camera Flash  
■
PDA/Cell Phone Flash  
■
Emergency Strobe  
U
TYPICAL APPLICATIO  
LT3585-1 Photoflash Charger Uses High Efficiency  
2mm Tall Transformers with Tunable IGBT Gate Drive  
LT3585-1 Charging Waveform  
Normal Input Current Mode  
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY  
V
BAT  
1:10:2  
320V  
2 AA OR  
1
2
4
5
1 TO 2 Li-Ion  
•
4.7µF  
1M  
+
50µF  
PHOTOFLASH  
CAPACITOR  
•
2.2µF  
600V  
A
V
OUT  
V
SW  
GND  
50V/DIV  
BAT  
TRIGGER T  
FLASHLAMP  
C
DONE  
1
3
2
CHRG/IADJ  
LT3585-1  
V
IN  
5V  
V
IN  
0.22µF  
I
IGBTPWR  
IGBTIN  
IN  
500mA/DIV  
IGBTPU  
IGBTPD  
3585 TA01b  
TO GATE OF IGBT  
V
C
= 3.6V  
= 50µF  
1sec/DIV  
BAT  
OUT  
20Ω TO  
160Ω  
3585 TA01a  
3585f  
1
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