LT3751EUFD#PBF Linear Technology, LT3751EUFD#PBF Datasheet - Page 29

• 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

C1, C8: 16V COG CERAMIC
C2: 16V X5R OR X74 CERAMIC
C3: 350V ELECTROLYTIC
C4: 250V X5R OR X7R CERAMIC
C5, C6, C11, C12: 630V X5R OR X7R CERAMIC
C7: 350V ELECTROLYTIC
C9, C10: 25V X5R OR X7R CERAMIC
F1: 250V, 2A FUSE
R1: 2010 RESISTOR, 1%
R2, R3, R6, R16, R17: 1206 RESISTORS, 1%
R4, R5: TWO 1206 RESISTORS IN SERIES, 1%
R7 THRU R12, R15 THRU R20: 0805 RESISTORS, 1%
D1: 12V ZENER
D2: VISHAY MURS140
D3: VISHAY P6KE200A
D4: VISHAY MURS160
D5: STMICROELECTRONICS STTH112A
D6: VISHAY BAT54
D7: NXP SEMICONDUCTORS BAS516
M1: VISHAY IRF830
M2: STMICROELECTRONICS STB11NM60FD
TYPICAL APPLICATIONS
–0.50
–0.25
0.50
0.25
0
0
Load Regulation
100V TO
200VDC
V
TRANS
50
F1, 2A
100
I
OUT
V
(mA)
TRANS
C1
100pF
150
49.9k
D1
R1
T1: TDK SRW24LQ
(Np:Ns:Npb:Nsb = 1:2:0.08:0.08)
U1: NEC PS2801-1
U2: LINEAR TECHNOLOGY LT4430
200
M1
V
TRANS
3751 TA06b
V
CC
C2
1μF
250
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
+
OFF ON
R11, 84.5k
MICRO
R10, 4.3M
R12, 442k
R9, 2.7M
TO
C3
22μF
2
D2
100
Isolated 282V Voltage Regulator
CHARGE
CLAMP
V
DONE
FAULT
UVLO1
OVLO1
UVLO2
OVLO2
95
90
85
80
75
70
CC
100
GND RBG
Effi ciency
RV
LT3751
TRANS
R2, 10Ω
R3
210k
R8
2.49k
120
HVGATE
63W OUTPUT
48W OUTPUT
25W OUTPUT
LVGATE
RV
RDCM
3751 TA06a
CSN
CSP
OUT
FB
INPUT VOLTAGE (V)
140
105k
R4
V
ISOLATION BOUNDARY
R7
475Ω
CC
40mΩ
210k
R5
R6
160
C4
1μF
2
M2
V
CC
D3
180
D4
C5
0.01μF
Npb
3751 TA06c
Np
U1
Y RATED
•
•
200
4.7nF
T1
•
•
Ns
Nsb
5.11Ω
100V/DIV
100V/DIV
I
I
R15
PRIMARY
PRIMARY
D7
V
V
0.47μF
2A/DIV
2A/DIV
3.3μF
DRAIN
DRAIN
C10
C9
D6
D5
274Ω
R20
Steady-State Operation with
7.1mA Load Current
Steady-State Operation with
225mA Load Current
V
GND
OC
OPTO
IN
LT4430
U2
C6
0.1μF
COMP
FB
20μs/DIV
20μs/DIV
+
C7
400μF
LT3751
R19
3.16k
C8
22nF
29
R16
249k
R17
221k
R18
1k
V
282V
225mA
3751 TA06d
3751 TA06e
3751fb
OUT