Product # BQ55090ETA27

Phone 1-888-567-9596

Doc.# 005-2BE559C Rev. B

10/10/06

Page 4

Input:

Input:

Output:

Output:

Current:

Current:

ackage:

35-55 V

35-55 V

9.6 V

9.6 V

27 A

27 A

Eighth-brick

Eighth-brick

T

pecification

Min.

Typ.

Max.

Units

Notes & Conditions

FEATURE CHARACTERISTICS

Switching Frequency

120

150

180

kHz

ON/OFF Control (Option P)

Off-State Voltage

-1.0

0.8

V

On-State Voltage

2.4

18

V

ON/OFF Control (Option N)

Off-State Voltage

2.4

18

V

On-State Voltage

-1.0

0.8

V

ON/OFF Control (Either Option)

Figures A & B

Pull-Up Voltage

9

V

Pull-Up Resistance

124

kW

Output Over-Voltage Protection

11.6

V

Over full temp range; no load

Over-Temperature Shutdown

140

150

°C

Average PCB Temperature

Over-Temperature Shutdown Restart Hysteresis

10

°C

Load Current Scale Factor

1667

See App Note: Output Load Current Calc.

RELIABILITY CHARACTERISTICS

Calculated MTBF (Telcordia)

2.36

Calculated MTBF (MIL-217)

1.79

Field Demonstrated MTBF

STANDARDS COMPLIANCE

Notes

STANDARDS COMPLIANCE

UL/cUL 60950-1

File # E194341, Basic insulation & pollution degree 2

EN60950-1

Certified by TUV

72/23/EEC

93/68/EEC

Needle Flame Test (IEC 695-2-2)

Test on entire assembly; board & plastic components UL94V-0 compliant

IEC 61000-4-2

GR-1089-CORE

Section 7 - electrical safety, Section 9 - bonding/grounding

• An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety

certificates on new releases or download from the SynQor website.

QUALIFICATION TESTING

# Units

Test Conditions

QUALIFICATION TESTING

Life Test

32

Vibration

5

10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis

Mechanical Shock

5

100g minimum, 2 drops in x and y axis, 1 drop in z axis

Temperature Cycling

10

-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles

Power/Thermal Cycling

5

Design Marginality

Humidity

5

85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off

Solderability

3

MIL-STD-883, method 2003

• Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we

supply robust, reliable product. Contact the factory for official product family qualification documents.

ELECTRICAL CHARACTERISTICS (Continued)

OPTIONS

SynQor provides various options for Logic Sense, Pin Length and

Feature Set for this family of DC/DC converters. Please consult the

last page for information on available options.

PATENTS

SynQor is protected under various patents, including but not lim-

ited to U.S. Patent numbers 5,999,417; 6,222,742 B1;

6,594,159 B2; 6,545,890 B2.