DYNEX DFB5435, DFB5434, DFB5433, DFB5432, DFB5431 Datasheet

DFB54

DFB54

Fast Recovery Diode

Replaces March 1998 version, DS4219-2.4

DS4219-3.0 January 2000

APPLICATIONS

■Power Supplies

■Freewheel Diode

■Battery Chargers

■D.C. Motor Control

■Welding

■Rectification

FEATURES

■Double Side Cooling

■High Surge Capability

■Low Recovery Charge

VOLTAGE RATINGS

Type Number	Repetitive Peak	Conditions
	Reverse Voltage
	VRRM
	V
DFB54 35	3500	VRSM = VRRM + 100V
DFB54 34	3400
DFB54 33	3300
DFB54 32	3200
DFB54 31	3100
DFB54 30	3000

Lower voltage grades available.

KEY PARAMETERS

VRRM

3500V

IF(AV)

2135A

IFSM

20000A

Qr

1500μC

trr

6.5μs

Outline type code: DO200AD.

See Package Details for further information.

CURRENT RATINGS

Symbol	Parameter			Conditions			Max.	Units
Double Side Cooled
I	Mean forward current	Half wave resistive load, T			case	= 65oC	2135	A
F(AV)
I	RMS value	T	case	= 65oC			3350	A
F(RMS)
I	Continuous (direct) forward current	T	case	= 65oC			3060	A
F
Single Side Cooled (Anode side)
IF(AV)	Mean forward current	Half wave resistive load, Tcase = 65oC					1320	A
I	RMS value	T	case	= 65oC			2080	A
F(RMS)
I	Continuous (direct) forward current	T	case	= 65oC			1810	A
F

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DFB54

SURGE RATINGS

	Symbol	Parameter	Conditions	Max.	Units
	IFSM	Surge (non-repetitive) forward current	10ms half sine; with 0% VRRM, Tj = 150oC	20.0	kA
	I2t	I2t for fusing		2000 x 103	A2s
	IFSM	Surge (non-repetitive) forward current	10ms half sine; with 50% VRRM, Tj = 150oC	16	kA
	I2t	I2t for fusing		1280 x 103	A2s

THERMAL AND MECHANICAL DATA

	Symbol	Parameter	Conditions		Min.	Max.	Units
			Double side cooled	dc	-	0.013	oC/W
	R	Thermal resistance - junction to case		Anode dc	-	0.025	oC/W
	th(j-c)		Single side cooled
				Cathode dc	-	0.027	oC/W
			Clamping force 44kN	Double side	-	0.003	oC/W
	Rth(c-h)	Thermal resistance - case to heatsink
			with mounting compound	Single side	-	0.006	oC/W
	Tvj	Virtual junction temperature	Forward (conducting)		-	150	oC
	Tstg	Storage temperature range			-55	150	oC
	-	Clamping force			39.6	48.4	kN

CHARACTERISTICS

Symbol		Parameter			Conditions			Typ.	Max.	Units
V		Forward voltage	At 1500A peak, T			case	= 25oC	-	1.7	V
	FM
I	RRM	Peak reverse current	At V	RRM	, T = 150oC			-	100	mA
					case
	trr	Reverse recovery time						-	6.5	μs
QRA1		Recovered charge (50% chord)	IF = 1000A, diRR/dt = 100A/μs					-	1500	μC
IRM		Reverse recovery current	Tcase = 150oC, VR = 100V					-	450	A
	K	Soft factor						-	-	-
VTO		Threshold voltage	At Tvj = 150oC					-	1.15	V
	rT	Slope resistance	At Tvj = 150oC					-	0.32	mΩ
V		Forward recovery voltage	di/dt = 1000A/μs, T = 125oC					-	-	V
	FRM					j

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DFB54

DEFINITION OF K FACTOR AND QRA1

QRA1 = 0.5x IRR(t1 + t2)

dIR/dt	t2	k = t1/t2
t1		τ
0.5x IRR
IRR

CURVES

F

Instantaneous forward current I - (A)

5000 Measured under pulse conditions

4000
3000
2000
1000													Tj		= 150˚C
0																								Tj		= 25˚C
																																		3.0
0.5		1.0													1.5											2.0							2.5

Instantaneous forward voltage VF - (V)

Fig.1 Maximum (limit) forward characteristics

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