LT3751EUFD#PBF Linear Technology, LT3751EUFD#PBF Datasheet - Page 34

• Manufacturer Part Number: LT3751EUFD#PBF
• Description: IC CAPACITOR CHRG 20-QFN
• Manufacturer: Linear Technology

Specifications of LT3751EUFD#PBF

• Applications: Photoflash Capacitor Charger
• Current - Supply: 5.5mA
• Voltage - Supply: 4.75 V ~ 24 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-QFN
• Primary Input Voltage: 24V
• No. Of Outputs: 1
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Supply Voltage Range: 4.75V To 24V
• Termination Type: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LT3751
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER
LTC3225
LT3420/LT3420-1
LT3468/LT3468-1/
LT3468-2
LT3484-0/LT3484-1/
LT3484-2
LT3485-0/LT3485-1/
LT3485-2/LT3485-3
LT3585-0/LT3585-1/
LT3585-2/LT3585-3
LT3750
ThinSOT is a trademark of Linear Technology Corporation.
34
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
24V
V
CC
DESCRIPTION
V
150mA Supercapacitor Charger
1.4A/1A, Photofl ash Capacitor Charger
with Automatic Top-Off
1.4A, 1A, 0.7A, Photofl ash Capacitor Charger
1.4A, 0.7A, 1A Photofl ash Capacitor Charger
1.4A, 0.7A, 1A, 2A Photofl ash Capacitor
Charger with Output Voltage Monitor and
Integrated IGBT
1.2A, 0.55A, 0.85A, 1.7A Photofl ash
Capacitor Charger with Adjustable Input
Current and IGBT Drivers
Capacitor Charger Controller
TRANS
24V
●
V
FAX: [phone]
C1
10μF
TRANS
C1: 25V X5R OR X7R CERAMIC CAPACITOR
C2: 25V X5R OR X7R CERAMIC CAPACITOR
C3: 25V ELECTROLYTIC
C4: 330V RUBYCON PHOTOFLASH CAPACITOR
D1: VISHAY US1M 1000V
V
CC
+
OFF ON
MICRO
TO
C3
680μF
432k
475k
432k
475k
R1
R2
R3
R4
UVLO1
OVLO1
UVLO2
OVLO2
CHARGE
CLAMP
DONE
FAULT
V
CC
●
GND
www.linear.com
RV
LT3751
TRANS
RBG
R6
40.2k
HVGATE
300V Regulated Power Supply
LVGATE
RV
RDCM
3751 TA08
CSP
CSN
OUT
FB
18.2k
R7
V
COMMENTS
CC
V
Charges 220μF to 320V in 3.7 Seconds from 5V, V
10-Lead MS Package
V
V
V
V
V
V
V
V
V
C2
2.2μF
R9
1.13k
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
5
: 2.75V to 5.5V, Charges Two Supercapacitors in Series to 4.8V or 5.3V
: 2.5V to 16V, Charge Time: 4.6 Seconds for LT3468 (0V to 320V, 100μF ,
: 1.8V to 16V, Charge Time: 4.6 Seconds for LT3484-0 (0V to 320V, 100μF ,
: 1.8V to 10V, Charge Time: 3.7 Seconds for LT3485-0 (0V to 320V, 100μF ,
: 1.5V to 16V, Charge Time: 3.3 Seconds for LT3585-3 (0V to 320V, 100μF ,
: 3V to 24V, Charge Time: 300ms for (0V to 300V, 100μF) MSOP-10 Package
M1: FAIRCHILD FQP34N20L
R1 THROUGH R4: USE 1% 0805 RESISTORS
R5: IRC LR SERIES 2512 RESISTOR
T1: SUMIDA PS07-299, 20A TRANSFORMER
= 3.6V), I
= 3.6V), I
= 3.6V), I
= 3.6V), I
•
1:10
M1
T1
R5
6mΩ
SD
SD
SD
SD
•
< 1μA, ThinSOT™ Package
< 1μA, 2mm × 3mm 6-Lead DFN Package
< 1μA, 3mm × 3mm 10-Lead DFN Package
< 1μA, 3mm × 2mm DFN-10 Package
D1
+
C5
10nF
C4
20μF
* DEPENDING ON DESIRED OUTPUT
R8*
274k
VOLTAGE, R8 MUST BE SPLIT
INTO MULTIPLE RESISTORS TO
MEET MANUFACTURER’S VOLTAGE
SPECIFICATION.
V
300V
0mA TO 270mA
OUT
© LINEAR TECHNOLOGY CORPORATION 2008
IN
: 2.2V to 16V, I
LT 0510 REV B • PRINTED IN USA
SD
< 1μA,
3751fb