MSK BBF2815SK, BBF2815SH, BBF2815SE, BBF2815S, BBF2812SK Datasheet

HI-REL DESIGN

 REPLACES APEX DB2800S SERIES

 SURFACE MOUNT MAGNETICS

 WELDED HERMETIC PACKAGE

 LOW INTERNAL TEMPERATURE GRADIENTS

 ALL CERAMIC CAPACITORS

 WITHSTANDS 5000G

OTHER FEATURESSINGLE OUTPUT



NO DERATING  55°C to +125°C

 OUTPUT VOLTAGE ADJUSTMENT STANDARD

 REMOTE SHUTDOWN

DESCRIPTION

The BBF2800S series of DC-DC converters provides the
ruggedness, reliability and features required to meet the
advanced design challenges of today’s hi-rel market. This has
been accomplished using a package having very low thermal
gradients, excellent hermeticity and high voltage isolation.
The use of advanced substrate and reflow soldering tech­niques during construction results in a rugged, cost-effective
pin solderable package.

The BBF2800S hybrid converter series utilizes all ceramic
capacitors and surface mount magnetics to provide reliable
operation at all operating temperatures while surviving very
high G forces.

BBF2800S series standard features include kelvin sense,
indefinite short circuit protection, remote shutdown, output
fault monitoring, turn on voltage point adjustment, switching
frequency synchronization of up to 3 units using no external
components and pi-network input filtering. An output voltage
adjustment/load compensation pin is also standard.

Fault tolerant design protects these converters from most
external circuit faults. The output and output adjust pins will
withstand +35V while the shutdown and all synchronization
pins will withstand +50V protecting the converters from a
variety of system or board faults, i.e. solder bridges, etc.
Unique load fault protection circuitry allows this converter to
pull up loads having difficult static load line characteristics and
allows short term load excursions significantly beyond ratings
in most applications.

The BBF2800 series is a current mode push-pull topology
converter which operates at a switching frequency of 500KHz.
Internal filtering of both input and output eliminates the need for
external capacitors in many applications.

The 12-pin power dip package allows connection to a
heatsink and is hermetically sealed and isolated from the
internal circuits.

P W M

CURRENT MODE

CONTROLLER

ERROR AMPLIFIER

REFERENCE AND

ISOLATION

8

7

5

6

1

2

3
10
11

12

4

BLOCK DIAGRAM

4707 Dey Road Liverpool, N.Y. 13088

M.S.KENNEDY CORP.

[phone]

BBF2800S

SERIES

ISO-9001 CERTIFIED BY DSCC

20W

DC-DC

CONVERTERS

Rev. - 3/011

EXTERNAL CONNECTIONS

1
2
3
4
5
6

+INPUT
SHUTDOWN PLUS
CLOCK
ADJUST/COMP

-OUTPUT
+OUTPUT

12
11
10
9
8
7

-INPUT
TIMING 2
TIMING 1
CASE

-SENSE
+SENSE

BBF2803S

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM

RATINGS

INPUT VOLTAGE RANGE (Pin 12 to 1, 2, 3, 10 or 11) 0 - 50 Vdc
INPUT TRANSIENT (Pin 12 to 1) 80 V @ 50 ms
OUTPUT WITHSTAND (Pin 5 and 8 to 7, 6 or 4) 35 Vdc
OUTPUT CURRENT (Continuous) 5.5 Adc BBF2803S

4.0 Adc BBF2805S

1.9 Adc BBF2812S

1.5 Adc BBF2815S

TEMPERATURE, Storage –65

o

C, 150oC

TEMPERATURE, Pin Soldering 10s 300oC

NOTES: 1. Unless otherwise stated: TC = 25°, VIN = 28V, I

OUT

= I

MAX AMPS

2. Derate power linearly to zero from 125°C to 135°C.

3. Regulation measured between pin 8 and pin 7.

4. Recovery spec assumes that converter has been OFF for at least 500ms.

CAUTION: The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or

subject to temperatures in excess of 850°C to avoid generating toxic fumes.

CAUTION

SPECIFICATIONS

BBF2803S

PARAMETER TEST CONDITIONS

1

MIN TYP MAX UNITS

STEADY STATE CHARACTERISTICS

INPUT VOLTAGE RANGE 16 28 40 Vdc
OUTPUT VOLTAGE VIN; min to max Vdc @ I

MIN

3.2 3.3 3.4 Vdc

OUTPUT CURRENT VIN; min to max Vdc 500 5500 mAdc
EFFICIENCY 66 %

OUTPUT RIPPLE VOLTAGE Bandwidth 10 kHz to 1MHz 20 50 mVrms
INPUT RIPPLE CURRENT Bandwidth 10 kHz to 1MHz 20 50 mArms

OUTPUT POWER

2

1.6 18.0 W

LINE REGULATION

3

VIN; min to max

3

2 20 mVdc

LOAD REGULATION

3

I

OUT

; min to max

3

1 15 mVdc

TEMPERATURE COEFFICIENT .01 %/°C
TEMPERATURE RANGE, case

2

–55 125 °C

QUIESCENT CURRENT I

OUT

= 0 A 35 40 mAdc

INHIBITED V

PIN5

; < 8 Vdc .09 1.25 2.5 mAdc

ISOLATION CHARACTERISTICS

(INPUT/OUTPUT/CASE)
LEAKAGE RESISTANCE (V

TEST

= 500Vdc) 100 MΩ

LEAKAGE CAPACITANCE (f = 10kHz) 50 pF

DYNAMIC CHARACTERISTICS

LINE STEP RESPONSE V

IN; TR

, TF = 10µs
VOLTAGE CHANGE VIN; 16 to 40 Vdc 300 mV
RECOVERY TIME (95%) 30 µs

WITH 100µF OUTPUT CAP

VOLTAGE CHANGE VIN; 16 to 40 Vdc 100 mV
RECOVERY TIME (95%) 100 µs

LOAD STEP RESPONSE I

OUT; TR

, TF = 10µs

VOLTAGE CHANGE I

OUT

; 50% to max Adc 1400 m V

RECOVERY TIME (95%) 40 µs

WITH 100µF OUTPUT CAP

VOLTAGE CHANGE I

OUT

; 50% to max Adc 300 mV

RECOVERY TIME (95%) 60 µs

START-UP OVERSHOOT VIN ; 0 to 40 Vdc 0 mV
SHUTDOWN DELAY V

PIN5

; > 10 Vdc to < 8 Vdc 220 500 µs

SHUTDOWN RECOVERY

4

V

PIN5

; < 8 Vdc to > 10 Vdc 30 60 mS

Rev. - 3/012

SPECIFICATIONS

BBF2805S  BBF2812S  BBF2815S

BBF2805S BBF2812S BBF2815S

MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS

16 28 40 16 28 40 16 28 40 Vdc

5.00 5.05 5.1 12.00 12.05 12.1 15.0 15.1 15.2 Vdc
400 4000 190 1900 150 1500 mAdc

70 72 73 %
20 50 25 50 25 50 mVrms
20 30 20 30 20 30 mArms

2 20 2.3 23 2.2 22 W

5 50 5 50 10 50 mVdc
2 25 5 50 20 50 mVdc

.01 .01 .01 %/°C

–55 125 –55 125 –55 125 °C

35 40 35 40 35 40 mAdc

.09 1.25 2.5 .09 1.25 2.5 .9 1.25 2.5 mAdc

100 100 100 MΩ

50 80 85 pF

400 300 300 mV

30 40 40 µs

200 150 150 mV
250 250 250 µs

1400 800 800 mV

40 60 60 µs

500 280 280 mV
150 400 400 µs

000mV

220 500 220 500 220 500 µs

30 60 30 60 30 60 ms

PACKAGE THERMAL SPECIFICATIONS MIN TYP MAX UNITS
RESISTANCE, case to air 12 °C/W

TEMPERATURE RISE, junction to case 10 15 °C

Rev. - 3/013