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参数资料
| 型号： | LT3585EDDB-3 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.85 A BATTERY CHARGE CONTROLLER, PDSO10 |
| 封装： | 3 X 2 MM, PLASTIC, MO-229WECD-1, DFN-10 |
| 文件页数： | 1/20页 |
| 文件大小： | 415K |
| 代理商： | LT3585EDDB-3 |
LT3585-0/LT3585-1
LT3585-2/LT3585-3
1
3585f
Photoash Chargers with
Adjustable Input Current
and IGBT Drivers
The LT
3585 series are highly integrated ICs designed to
charge photoash capacitors in digital and lm 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.
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
the input current of the charger, useful in extending battery
life. The DONE pin indicates when the part has completed
charging.
The LT3585 series of parts are housed in tiny 3mm
×
2mm DFN packages.
■ Digital/Film Camera Flash
■ PDA/Cell Phone Flash
■ Emergency Strobe
■ Adjustable Input Current
■ Integrated IGBT Driver
■ No Output Voltage Divider Needed
■ Uses Small Transformers: 5.8mm
× 5.8mm × 3mm
■ Fast Photoash Charge Times
■ Charges Any Size Photoash 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
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
Fast Charge Time
VERSION
INPUT
CURRENT (mA)
NORMAL MODE
CHARGE TIME
(Sec)
REDUCED MODE
CHARGE TIME
(Sec)
LT3585-3
800/400
3.3
6.6
LT3585-0
550/275
4.6
9.2
LT3585-2
400/200
5.8
12.6
LT3585-1*
250/115
5.0
14.6
100F capacitor, 320V, VIN = VBAT = 3.6V
*50F capacitor, 320V, VIN = VBAT = 3.6V
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
A
C
+
DONE
CHRG/IADJ
VIN
IGBTPWR
IGBTIN
IGBTPU
IGBTPD
VBAT
SW
GND
LT3585-1
320V
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
TO GATE OF IGBT
3585 TA01a
50
F
PHOTOFLASH
CAPACITOR
0.22
F
4.7
F
VIN
5V
VBAT
2 AA OR
1 TO 2 Li-Ion
1
2
4
5
1:10:2
20
TO
160
2.2
F
600V
1M
FLASHLAMP
TRIGGER T
1
2
3
LT3585-1 Photoash Charger Uses High Efciency
2mm Tall Transformers with Tunable IGBT Gate Drive
LT3585-1 Charging Waveform
Normal Input Current Mode
VOUT
50V/DIV
IIN
500mA/DIV
1sec/DIV
3585 TA01b
VBAT = 3.6V
COUT = 50F
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