Datasheet > LCLH

LCLH

更新时间： 2024-11-02 05:41:39

品牌	Logo	应用领域
凌特 - Linear		驱动器双极性晶体管
页数	文件大小	规格书
20页	416K
描述
Photofl ash Chargers with Adjustable Input Current and IGBT Drivers

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LCLH 数据手册

LT3585-0/LT3585-1

LT3585-2/LT3585-3

Photoﬂash Chargers with

Adjustable Input Current

and IGBT Drivers

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

BAT

*50µF capacitor, 320V, V = V = 3.6V

BAT

, 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

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

BAT

1:10:2

320V

2 AA OR

1 TO 2 Li-Ion

•

4.7µF

50µF

PHOTOFLASH

CAPACITOR

•

2.2µF

600V

OUT

GND

50V/DIV

BAT

TRIGGER T

FLASHLAMP

DONE

CHRG/IADJ

LT3585-1

0.22µF

IGBTPWR

IGBTIN

500mA/DIV

IGBTPU

IGBTPD

3585 TA01b

TO GATE OF IGBT

= 3.6V

= 50µF

1sec/DIV

BAT

OUT

20Ω TO

160Ω

3585 TA01a

3585f

12 3 4 5 6 7...20

中文翻译

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LCLJ	Linear	获取价格	Photofl ash Chargers with Adjustable Input Current and IGBT Drivers
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