Datasheet LT3751 (Analog Devices) - 28

LT3751
TYPICAL APPLICATIONS High Input Voltage, High Output Voltage Regulator DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
T1* VTRANS F1, 1A D1 VOUT D2 1:3 100V TO 500V 100V TO * T1 REQUIRES PROPER THERMAL MANAGEMENT 400VDC + C3 R6, 625k C2 TO ACHIEVE DESIRED OUTPUT POWER LEVELS 47µF 2.2µF • + R7, 97.6k C4 ×5 100µF ** M1 REQUIRES PROPER HEAT SINK/THERMAL • DISSIPATION TO MEET MANUFACTURER’S RVTRANS R8, 417k SPECIFICATIONS C5 OFF ON CHARGE RDCM 0.47µF CLAMP R9 *** DEPENDING ON DESIRED OUTPUT VOLTAGE, VCC LT3751 67.3k R10 MUST BE SPLIT INTO MULTIPLE RESISTORS 10V TO VCC RVOUT TO MEET MANUFACTURER’S VOLTAGE SPECIFICATION 24V C1 10µF TO DONE R5, 20Ω C1: 25V X5R OR X7R CERAMIC MICRO HVGATE M1** C2: 630V X5R OR X7R CERAMIC FAULT LVGATE VCC C3: 450V ILLINOIS CAP 476CKE450MQW R1, 1.5M CSP C4: 50V TO 500V ELECTROLYTIC UVLO1 R12 V C5: TDK CKG57NX7R2J474M TRANS R2, 9M 68mΩ C6: 6.3V X5R OR X7R CERAMIC OVLO1 CSN D1, D2: VISHAY US1M 1000V R3, 154k R10*** F1: BUSSMANN PCB-1-R UVLO2 M1: FAIRCHILD FQB4N80 VCC R4, 475k FB R1, R2: 2 X 1206 RESISTORS IN SERIES, 1% OVLO2 C6 R3 THRU R5, R7, R9, R11: 0805 RESISTORS, 1% R11 GND RBG 10nF R6, R8: 3 X 1206 RESISTORS IN SERIES, 1% R10: 1206 RESISTOR(S), 1% 3751 TA05a R12: IRC LR SERIES 1206 RESISTOR, 1% T1: COILCRAFT HA4060-AL
Suggested Component Values IOUT(MAX) (mA) IOUT(MAX) (mA) VOUT AT VTRANS = 100V, AT VTRANS = 400V, R10 R11 (V) 1% VOUT DEFLECTION 1% VOUT DEFLECTION (kΩ) (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
Steady-State Operation with Efficiency Line Regulation 50mA Load Current
90 398 V VIN = 200V IN = 100V VOUT = 400V 80 VIN = 250V IOUT = 10mA VDRAIN 397 100V/DIV 70 TAGE (V) IOUT = 25mA VIN = 400V 60 EFFICIENCY (%) 396 IOUT = 50mA OUTPUT VOL IPRI 50 2A/DIV 40 395 0 25 50 75 100 200 300 400 3751 TA05d 10µs/DIV OUTPUT CURRENT (mA) INPUT VOLTAGE (V) 3751 TA05b 3751 TA05c 3751fd 28 For more information www.linear.com/LT3751 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts