Model: 6681-D3.3/5

6681-D3.3/5

12 – 30 Watt Hybrid DC-DC Converter

Features

Built in EMI input filter meets MIL-STD 461D/E/F requirements CE101,CE102, CS101, CS114, CS115 & CS116.

Meets DO160C/D/E/F/G CE Section 21 & CS Sections 20 & 22.

For MIL-STD 704/1275 applications

Completely self contained Thick Film Hybrid DC-DC Converter

No External Filter Caps required

Inhibit-not function

Short Circuit protection

Fully isolated, input to output

250kHz operation for low ripple and fast response time

Fully hermetic package

BIT

External Sync

Specifications

Input: 28 VDC

Input Range (Continuous): 16 VDC to 50 VDC

Input Range (Full Power): 18 VDC to 50 VDC

Transient Survival Voltage: 80 VDC

Isolation Input to Case: 500 VDC

Isolation Input to Output: 500 VDC

Isolation Output to Case: 100 VDC

Storage Temp: -55 °C to 150 °C

Shock: 50 G's

Acceleration: 500 G's

Vibration: 30 G's

Weight: 75 gms typical

Environment

Grade I:

Full Output Power at T_case = 85°C

Minimum Output Power at T_case = -55°C

Linearly derates to zero at T_case = 115

TID up to kRad(Si)
No SEE up to 60MeV*cm²/mg

Grade M:

Full Output Power at T_case = 85°C

Minimum Output Power at T_case = -55°C

Linearly derates to zero at T_case = 115

TID up to kRad(Si)
No SEE up to 60MeV*cm²/mg

Grade E:

Full Output Power at T_case = 125°C

Minimum Output Power at T_case = -55°C

Linearly derates to zero at T_case = 135

TID up to kRad(Si)
No SEE up to 60MeV*cm²/mg

Dual Output Devices

Toggle Columns: Parameter - Conditions

Parameters	Conditions	6681-D3.3/5 (30W) MIN	6681-D3.3/5 (30W) TYP	6681-D3.3/5 (30W) MAX
Output Voltage (FLD)	^+lout = ^-lout+	+3.2 -4.9	+3.3 -5.0	+3.4 -5.1
Output current	V_{in min} — V_{in max}	300mA 100mA	-	3A 1A
Efficiency	P_out = max rated load	63%	66%	-
Line regulation	P_out = max rated load V_{in min} — V_{in max}	-	±10mV ±10mV	±50mV ±50mV
Load regulation	P_out = 10% to F.L.	-	±10mV ±10mV	±50mV ±50mV
Output ripple	F.L. BW 2 MHz mV_pp	-	30 25	65 60

Pinout Table

6681-DXX
Pin-1: bit
Pin-2: inhibit not
Pin-3: soft start
Pin-4: sync
Pin-5: N/C
Pin-6: input ret
Pin-7: + input
Pin-8: N/C
Pin-9: N/C
Pin-10: + dual output
Pin-11: dual output rtn
Pin-12: - dual output

Case Styles

Part Number Designator	Case Style	Pin Count	Mounting	Step File
2	Case Style 2	12	Solder Sealed Flangelss PCB Mount	Download
F – 10 Pin	Case Style 3	10	Solder Sealed Flanged PCB Mount	Download
I	Case Style 5	12	Seam Weld Flangeless PCB Mount	Download
IF	Case Style 6	12	Seam Weld Flanged PCB Mount	Download
WF	Case Style 8	12	Seam Weld Flanged Chassis Mount	Download
PB	Case Style 10	12	Solder Sealed PCB Stud Mount	Download
PE	Case Style 12	12	Seam Weld Stud PCM Mount	Download