LT3751EUFD#PBF Linear Technology, LT3751EUFD#PBF Datasheet - Page 9

• 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

BLOCK DIAGRAM
V
12V
CC
V
TRANS
OFF
V
10μF
CC
ON
100k
R
R
R
R
191k
240k
191k
UVLO1
OVLO1
UVLO2
240k
OVLO2
100k
CHARGE
UVLO1
OVLO1
UVLO2
OVLO2
DONE
FAULT
V
CC
REFERENCE
OTLO
1.22V
3.8V
V
CC
55V
55V
55V
55V
S
Q
S
Q
MASTER
LATCH
+
–
–
+
+
–
–
+
+
–
R
Q
R
Q
UVLO/OVLO
COMPARATORS
FAULT
LATCH
INTERNAL
UVLO
GND
ONE-SHOT
1.33k
START-UP
R
ENABLE
GATE
DRIVER
COMPARATOR
BG
TO V
OUT
V
TRANS
RBG
12V
TO CHARGE
ONE-SHOT
COMPARATOR
ONE-SHOT
TEMP
+
26kHz ONE-SHOT
DIE
DCM
V
OUT
CLOCK
47μF
×2
COMPARATOR
160ºC
DCM
ONE-SHOT
CURRENT CONTROL
TIMING AND PEAK
CLOCK
26kHz
–
+
SWITCH
ONE-SHOT
LATCH
COUNTER
S
R
CLOCK
26kHz
Q
Q
REFERENCE
CONTROL
–
+
MODE
0.98V
RESET
CLK
COUNT
ERROR
GATE DRIVE
CIRCUITRY
AMP
COMPARATOR
60V CLAMPS
REFERENCE
INTERNAL
DIFF . AMP
11mV TO 106mV
1.22V
WITH
AUXILIARY
MODULATION
A1
MAIN
RV
40.2k
RV
TRANS
+
–
TRANS
V
+
+
–
–
CC
60V
162mV
106mV
REFERENCE
+–
+–
V
CC
1.22V
HVGATE
LVGATE
60V
60V
CLAMP
RV
RDCM
CSN
OUT
CSP
3751 BD
FB
10μF
RV
40.2k
R
18.2k
DCM
V
OUT
CC
1:10
•
T1
M1
R
12mΩ
•
SENSE
V
DRAIN
10nF
LT3751
D1
R
3.65M
R
10k
FBL
+
FBH
3751fb
9
C
V
450V
OUT
OUT