参数资料
型号: LT3751IFE#TRPBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
封装: 4.40 MM, LEAD FREE, PLASTIC, TSSOP-20
文件页数: 21/34页
文件大小: 403K
代理商: LT3751IFE#TRPBF
LT3751
28
3751fb
CHARGE
CLAMP
VCC
DONE
FAULT
UVLO1
OVLO1
UVLO2
OVLO2
RDCM
RVOUT
HVGATE
LVGATE
CSP
CSN
FB
RVTRANS
T1*
1:3
D1
F1, 1A
VOUT
100V TO 500V
VTRANS
100V TO
400VDC
VCC
3751 TA05a
LT3751
GND RBG
R6, 625k
OFF ON
C3
47μF
C2
2.2μF
5
C1
10μF
R8, 417k
R5, 20Ω
R7, 97.6k
M1**
R12
68mΩ
R9
67.3k
D2
+
C4
100μF
VTRANS
VCC
R2, 9M
R1, 1.5M
R4, 475k
R3, 154k
C1: 25V X5R OR X7R CERAMIC
C2: 630V X5R OR X7R CERAMIC
C3: 450V ILLINOIS CAP 476CKE450MQW
C4: 50V TO 500V ELECTROLYTIC
C5: TDK CKG57NX7R2J474M
C6: 6.3V X5R OR X7R CERAMIC
D1, D2: VISHAY US1M 1000V
F1: BUSSMANN PCB-1-R
M1: FAIRCHILD FQB4N80
R1, R2: 2 X 1206 RESISTORS IN SERIES, 1%
R3 THRU R5, R7, R9, R11: 0805 RESISTORS, 1%
R6, R8: 3 X 1206 RESISTORS IN SERIES, 1%
R10: 1206 RESISTOR(S), 1%
R12: IRC LR SERIES 1206 RESISTOR, 1%
T1: COILCRAFT HA4060-AL
* T1 REQUIRES PROPER THERMAL MANAGEMENT
TO ACHIEVE DESIRED OUTPUT POWER LEVELS
** M1 REQUIRES PROPER HEAT SINK/THERMAL
DISSIPATION TO MEET MANUFACTURER’S
SPECIFICATIONS
***DEPENDING ON DESIRED OUTPUT VOLTAGE,
R10 MUST BE SPLIT INTO MULTIPLE RESISTORS
TO MEET MANUFACTURER’S VOLTAGE SPECIFICATION
TO
MICRO
VCC
10V TO
24V
C5
0.47μF
R11
R10***
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
C6
10nF
OUTPUT CURRENT (mA)
0
40
EFFICIENCY
(%)
50
60
70
80
90
25
50
3751 TA05b
75
VIN = 400V
VIN = 250V
VIN = 100V
INPUT VOLTAGE (V)
100
395
OUTPUT
VOL
TAGE
(V)
396
397
398
200
300
3751 TA05c
400
IOUT = 25mA
IOUT = 50mA
IOUT = 10mA
10μs/DIV
3751 TA05d
VIN = 200V
VOUT = 400V
VDRAIN
100V/DIV
IPRI
2A/DIV
Efciency
Line Regulation
Steady-State Operation with
50mA Load Current
TYPICAL APPLICATIONS
High Input Voltage, High Output Voltage Regulator
Suggested Component Values
VOUT
(V)
IOUT(MAX) (mA)
AT VTRANS = 100V,
1% VOUT DEFLECTION
IOUT(MAX) (mA)
AT VTRANS = 400V,
1% VOUT DEFLECTION
R10
(kΩ)
R11
(kΩ)
100
55
130
30.9
0.383
200
110
150
124
0.768
300
95
175
274
1.13
400
80
130
499
1.54
500
65
140
715
1.74
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