Product # BQ55090ETA27

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2BE559C Rev. B

10/10/06

Page 3

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

Parameter

Min.

Typ.

Max.

Units

Notes & Conditions

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Non-Operating

60

V

Continuous

Operating

56

V

Continuous

Isolation Voltage (input to output)

2000

V

Basic insulation, Pollution Degree 2

Operating Temperature

-40

100

°C

Storage Temperature

-55

125

°C

Voltage at ON/OFF input pin

-2

18

V

INPUT CHARACTERISTICS

Operating Input Voltage Range

35

48

55

V

Input Under-Voltage Lockout

Turn-On Voltage Threshold

34.3

V

Turn-Off Voltage Threshold

32

V

Lockout Voltage Hysteresis

2.4

V

Input Over-Voltage Shutdown

Turn-Off Voltage Threshold

59.2

V

Turn-On Voltage Threshold

56.9

V

Maximum Input Current

5.8

A

100% Load, 35 Vin

No-Load Input Current

0.10

A

Disabled Input Current

15

30

mA

Inrush Current Transient Rating

0.1

Input Reflected Ripple Current

3.8

7.0

mA

RMS through 10µH inductor; Figures 12 & 14

Input Terminal Ripple Current

250

mA

RMS, full load; Figures 13

Recommended Input Fuse

20

A

Fast blow external fuse recommended

Input Filter Component Values (L\C)

1.5\2.0

µH\µF

Internal values

Recommended External Input Capacitance

47

µF

Typical ESR 0.1-0.2W, see Figure 12

OUTPUT CHARACTERISTICS

Output Voltage Set Point

9.60

V

48Vin, no load

Output Voltage Regulation

Over Line

40/3.8

%\V

Figure 4

Over Load

4.8/460

%\mV

Figure 4

Over Temperature

2/200

%\mV

Figure 4

Total Output Voltage Range

6.3

11.0

V

Over sample, line, load, temperature & life

20MHz bandwidth; Figure 12 & 15

Peak-to-Peak

100

120

mV

Full Load; see Figures 12 & 15

RMS

20

40

mV

Full Load; see Figures 12 & 15

Operating Output Current Range

0

27

A

Subject to thermal derating; Figures 5 & 7

Output DC Current-Limit Inception

34

A

Output Voltage 10% Low; Figure 16

Output DC Current-Limit Shutdown Voltage

0

V

Current Share Accuracy (3 units paralleled)

+10

%

% of rated output current

Back-Drive Current Limit while Disabled

10

mA

Negative current drawn from output

Maximum Output Capacitance

3,000

µF

9.6Vout at 27A Resistive Load

DYNAMIC CHARACTERISTICS

Output Voltage during Load Current Transient

For a Step Change in Output Current (0.1A/µs)

150

mV

50% to 75% to 50% Iout max; Figure 11

Settling Time

200

µs

To within 1% Vout nom

Turn-On Transient

Turn-On Time

1

ms

Full load, Vout=90% nom.; Figures 9 &10

Start-Up Inhibit Time

20

ms

-40°C to +125°C

Output Voltage Overshoot

0

%

2,500 µF load capacitance, Iout = 0A

EFFICIENCY

100% Load

95.7

%

Figures 1 &3

50% Load

96.1

%

Figures 1 &3

TEMPERATURE LIMITS FOR POWER DERATING CURVES

Semiconductor Junction Temperature

125

°C

Package rated to 150°C

Board Temperature

125

°C

UL rated max operating temp 130°C

Transformer Temperature

125

°C

See Figures 5 & 7 for derating curves

ISOLATION CHARACTERISTICS

Isolation Voltage (dielectric strength)

2000

V

Isolation Resistance

30

BQ55090ETA27 ELECTRICAL CHARACTERISTICS

perature with appropriate power derating. Specifications subject to change without notice.

Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)