LT3484EDCB-1#TRPBF Linear Technology, LT3484EDCB-1#TRPBF Datasheet

IC PHOTOFLASH CAP CHARGER 6-DFN

LT3484EDCB-1#TRPBF

Manufacturer Part Number
LT3484EDCB-1#TRPBF
Description
IC PHOTOFLASH CAP CHARGER 6-DFN
Manufacturer
Linear Technology
Datasheet

Specifications of LT3484EDCB-1#TRPBF

Applications
Photoflash Capacitor Charger
Current - Supply
5mA
Voltage - Supply
1.7 V ~ 16 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
6-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Manufacturer
Quantity
Price
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Part Number:
LT3484EDCB-1#TRPBFLT3484EDCB-1
Manufacturer:
LT
Quantity:
10 000
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Part Number:
LT3484EDCB-1#TRPBFLT3484EDCB-1
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LT3484EDCB-1#TRPBF
Quantity:
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Company:
Part Number:
LT3484EDCB-1#TRPBF
Manufacturer:
LINEAR
Quantity:
20 000
Company:
Part Number:
LT3484EDCB-1#TRPBFLT3484EDCB-1TRPBF
Quantity:
849
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
V
5V
CC
1 TO 2 Li-Ion
Digital Camera and Cell Phone Flash Charger
Highly Integrated IC in 2mm × 3mm DFN Package
Reduces Solution Size
Uses Small Transformers:
Fast Photoflash Charge Times:
Operates from Two AA Batteries, or Any Supply from
1.8V up to 16V
Controlled Average Input Current
No Output Voltage Divider Needed
No External Schottky Diode Required
Charges Any Size Photoflash Capacitor
Available in 6-Lead 2mm × 3mm DFN Package
5.8mm × 5.8mm × 3mm
4.6s for LT3484-0 (0V to 320V, 100µF, V
5.7s for LT3484-2 (0V to 320V, 100µF, V
5.5s for LT3484-1 (0V to 320V, 50µF, V
500mA (LT3484-0)
350mA (LT3484-2)
225mA (LT3484-1)
2AA OR
DANGER HIGH VOLTAGE – OPERATION BY HIGH VOLTAGE
V
0.1µF
BAT
High Efficiency 3mm Tall Transformers
LT3484-0 Photoflash Charger Uses
100k
4.7µF
TRAINED PERSONNEL ONLY
U
V
DONE
CHARGE
V
IN
BAT
LT3484-0
SW
GND
1
2
1:10.2
U
4
5
+
IN
IN
IN
348412 TA01
= 3.6V)
150µF
PHOTOFLASH
CAPACITOR
320V
= 3.6V)
= 3.6V)
DESCRIPTIO
The LT
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 V
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.
LT3484-0/LT3484-1/LT3484-2
trademarks are the property of their respective owners. Protected by U.S. Patents
including 6636021.
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
®
3484 family of photoflash capacitor charger ICs is
Photoflash Capacitor
CURRENT
AVERAGE
50V/DIV
1A/DIV
INPUT
V
OUT
V
C
IN
OUT
LT3484-0 Charging Waveform
U
= 3.6V
= 100µF
BAT
pin, which allows the use of 2
1s/DIV
Chargers
3484 TA02
3484012f
1

Related parts for LT3484EDCB-1#TRPBF

LT3484EDCB-1#TRPBF Summary of contents

Page 1

... The LT3484 series of parts are housed in a tiny low profile 2mm × 3mm DFN package. , 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. ...

Page 2

... EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB ORDER PART NUMBER LT3484EDCB-0 LT3484EDCB-1 LT3484EDCB-2 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges. ...

Page 3

W U TYPICAL PERFOR A CE CHARACTERISTICS LT3484-1 curves use the circuit of Figure 7 and LT3484-2 use the circuit of Figure 8, T LT3484-0 Charging Waveform 100µF OUT V OUT 50V/DIV AVERAGE INPUT ...

Page 4

LT3484-0/LT3484-1/LT3484 TYPICAL PERFOR A CE CHARACTERISTICS LT3484-1 curves use the circuit of Figure 7 and LT3484-2 use the circuit of Figure 8, T LT3484-0 Switch Current Limit 1.5 1.4 1.3 1.2 1.1 – 40 – ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS LT3484-1 curves use the circuit of Figure 7 and LT3484-2 use the circuit of Figure 8, T LT3484-0 Switching Waveform 100V OUT V SW 10V/DIV I PRI ...

Page 6

LT3484-0/LT3484-1/LT3484 CTIO S DONE (Pin 1): Open NPN Collector Indication Pin. When target output voltage is reached, NPN turns on, pulling Pin 1 low. This pin needs a pull-up resistor or current source. CHARGE (Pin ...

Page 7

U OPERATIO The LT3484-0/LT3484-1/LT3484-2 are designed to charge photoflash capacitors quickly and efficiently. The opera- tion of the part can be best understood by referring to Figure 1. When the CHARGE pin is first driven high, a one shot sets ...

Page 8

... SW pin, the parasitic capacitance of the transformer would become large. This will adversely affect the charge time of the photoflash circuit. Linear Technology has worked with several leading mag- netic component manufacturers to produce pre-designed flyback transformers for use with the LT3484-0/ LT3484-1/LT3484-2 ...

Page 9

U U APPLICATIO S I FOR ATIO 320V OUT V SW 10V/DIV 100ns/DIV Figure 3. LT3484-0 SW Voltage Waveform Table 2. Pre-Designed Transformers – Typical Specifications Unless Otherwise Noted FOR USE WITH TRANSFORMER NAME ...

Page 10

LT3484-0/LT3484-1/LT3484 APPLICATIO S I FOR ATIO Table 3. Recommended Output Diodes MAX REVERSE VOLTAGE MAX FORWARD CONTINUOUS CURRENT PART (V) GSD2004S 2x300 (Dual Diode) BAV23S 2x250 (Dual Diode) MMBD3004S 2x350 (Dual Diode) Board Layout The high voltage operation ...

Page 11

... RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Multi-Phase Synchronous Step-Up DC/DC SW Converter LTC3440 600mA (I ), 2MHz, Synchronous Buck-Boost DC/DC OUT Converter LT3468/LT3468-1/ 1.4A/0.7A/1A Photoflash Capacitor Chargers in ThinSOT™ LT3468-2 ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● 1:10.4 320V ...

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