Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 1 of 12

www.power-one.com

Applications

Distributed power architectures

Data and Telecommunications Equipment

Computer

Equipment

Distributed power architectures

LAN/WAN

applications

Data processing applications

Features

60 Watts maximum total output power

Three fully isolated outputs 5V/12V/12V

5V output provides up to 12 Amps

(2) 12V outputs each provide up to 2.5 Amps

Excellent

cross

regulation

Low profile 12.7 mm

High efficiency topology, 88% Typical

Output

overcurrent

& overvoltage protection

Overtemperature

protection

Set

point

accuracy

2.0%

1500V Input/output isolation meets basic
insulation requirements

UL 1950 Recognized, CSA 22.2 No. 950-95
certified; TUV IEC950

Description

The HBT17ZGHH DC-DC Converter operates over an input voltage range of 33Vdc to 75Vdc and provides
three isolated output voltages. The 5V output can provide a full 60W (12 Amperes) of output power and each
12V output can provide up to 30W (2.5 Amperes) of output power. The input is fully isolated from each
output and each output is isolated from one another. The isolation of each output provides flexible output
configurations and separate output returns, which are important in preventing cross-interference between
different loads in system applications. The module has a typical full load efficiency of 88%.

The two-board construction optimizes thermal performance. Power devices are connected to an Integrated
Metal Substrate base plate to minimize thermal impedance and a separate control board is physically
isolated from the hotter IMS board. This approach allows for lower average component temperatures on the
control board and increases the overall reliability. The comprehensive standard feature set includes remote
on/off, and output trim.

Selection Chart

Model

Input

voltage

range,

VDC

Input

current,

max,

ADC

Output

voltage, VDC

Output

rated

current,

ADC

Output Ripple

and Noise,

mV p-p

Efficiency

HBT060ZGHH-A

33-75

3.0

5.0/12.2/12.2

12/2.5/2.5

125/150/150

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 2 of 12

www.power-one.com

Table 1. Absolute Maximum Ratings
Parameter

Symbol

Min

Max

Units

Input Voltage
Continuous
Transient

Vi
Vi

-
-

100

Vdc
Vdc

Operating Baseplate Temperature
Note 1

-40

+100

Storage Temperature

Tstg

-55

+125

Input to Output Isolation

1500

Vdc

Output Short Circuit Duration

Continuous

Total Output Power

Pomax

No Load Power Dissipation

Electrical Specifications

Unless otherwise indicated, specifications apply over all input voltages, resistive load, and Tbp=+40

Table 2. Input Specifications
Parameter

Symbol

Min

Typ

Max

Units

Voltage Range

Vdc

Maximum Input Current

Input Ripple Rejection (120Hz)

Inrush Transient

Input Reflected Ripple (See Fig.1)

100

p-p

Fusing considerations
Caution: This DC-DC converter is not internally fused. An external input fuse must always be used.

Table 3. Output Specifications
Parameter

Symbol

Min

Typ

Max

Units

Output Power

Po1
Po2
Po3

-
-
-

60
30
30

W
W
W

Output Voltage Set Point
(Vi=48Vdc, Io1=6A,
Io2=Io3=1.25A)

Vo1

Vo2, Vo3

4.9

11.834

5.0

12.2

5.1

12.566

Vdc
Vdc

Output Line Regulation:
(Vi=Vi,min to Vi,max)
(Io1=6A, Io2=Io3=1.25A)

Vo1

0.02

0.1

Output Load Regulation:
(0.5A to Iomax)

Vo1

0.2

0.4

Output Load Regulation:
(Vi = Vi.min to Vi,max)
(All Loading Conditions)

Vo2, Vo3

10.5

13.5

Vdc

Output Temperature Regulation:

(Tbase =-40

C to +100

All Outputs

0.02

0.05

Output Current
(Maximum output power limited to
60W)

Io1
Io2
Io3

0.5

0
0

1.25
1.25

2.5
2.5

A
A
A

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 3 of 12

www.power-one.com

Parameter

Symbol

Min

Typ

Max

Units

Output Ripple (See Figure 2)
(DC to 20MHz)
(Io1 = 6A, Io2,Io3 = 1.25A)

Vo1
Vo2
Vo3

-
-
-

125
150
150

200
250
250

mVp-p
mVp-p
mVp-p

Output Current Limit inception
(Other outputs at no load)

Io1
Io2
Io3

-
-
-

6.5
6.5

7
7

A
A
A

Transient Response
(50% to 100% Load Step,

Io/

t=0.1A/uSec)

Peak Deviation
Settling Time (Vo, 1% of Vo1)

Vo1

-
-

75
50

200
150

Sec

Overvoltage Limit

Vo1

5.9

6.5

Vdc

Table 4. Feature Specifications
Parameter

Symbol

Min

Typ

Max

Units

Remote On/Off, Primary side
Vlow
Vhigh
Sink Current-Logic Low

-
-
-

1
7
2

V
V

Turn-on time (Within 1% Vonom)

3.5

mSec

Switching Frequency

440

KHz

Output Voltage Adjust (Vo1 only)

Vo,adj

%Vo,nom

Thermal Shutdown

+105

+115

Undervoltage Lockout

Turn-on
Turn-off

32
30

32.9

V
V

Table 5. Environmental
Parameter

Min

Typ

Max

Units

Operating Baseplate Temperature

-40

+100

Operating Humidity (non-condensing)

Storage Humidity (non-condensing)

Table 6. Isolation Specifications

Parameter

Min

Typ

Max

Units

Input to Each Output

1500

Vdc

Input to Baseplate

1500

Vdc

Output to Output

500

Vdc

Resistance, Input - Output

Capacitance, Input - Output

1000

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 4 of 12

www.power-one.com

Table 7. EMI & Regulatory Agency Compliance

Conducted Emissions
(With input filter configuration in Figure 3.)

CISPR 22 class A

Safety Basic

UL60950 Recognized, CAN/CSA C22.2 No.
60950-00 Recognized

Table 8. General Specifications
Parameter

Min

Typ

Max

Units

Efficiency

(Vi=48Vdc, Io1=6A, Io2=Io3=1.25A)

87.5

Calculated MTBF (Po=60W, Tbp=40

900

kHrs

Table 9. Physical

Parameter

Min

Typ

Max

Units

Dimensions

2.30(58.4)

2.40(60.9 )

0.50(12.70 )

In. (mm)

Weight

2.4(68)

oz(g)

Markings & labeling

Includes Part Number, Power-One Logo, Date Code and
Country of Manufacture

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 5 of 12

www.power-one.com

Feature Descriptions

Output Over-voltage Clamp

The output overvoltage clamp consists of a
separate control loop, independent of the primary
control loop. This control loop has a higher
voltage set point than the primary loop. In a fault
condition which creates an excessive output
voltage, the converter goes into "Hiccup Mode"
(turns off and restarts periodically in a pre-
programmed fashion), and the output overvoltage
clamp ensures that the output voltage does not
exceed Vo, clamp, max. This secondary control
loop provides a redundant voltage control
mechanism that prevents catastrophic voltages
from occurring on the output under any single-
fault condition.

Output Current Protection

To provide protection in an output overload or
short circuit condition, the converter is equipped
with a current limiting circuit, which can protect
the converter from damage under a fault condition
indefinitely. At the current-limit inception point due
to an output overload, the converter goes into
"Hiccup Mode" and limits both the peak output
current and the duration of the operation. The
converter recovers automatically to its normal
operation once the output overload or short circuit
is removed.

Enable

Two enable options are available-Positive Logic
and Negative Logic. Positive Logic turns the
converter on when a logic-high is present at the
enable pin, and turns the converter off when a
logic-low is present at the enable pin. Negative
Logic turns the converter off when a logic-high is
present at the enable pin, and turns the converter
on when a logic-low is present at the enable pin.

Output Voltage Adjustment

Output voltage adjustment is accomplished by
connecting an external resistor between the Trim
Pin and the +Vo1 or Vo1 Pins.

With an external resistor (R

adj-down

) between the

Trim Pin and +Vo1 Pin the output voltage set
point (Vo,adj) decreases. The following equation
determines the required external resistor value to
obtain an adjusted output voltage:

Note: Output Vo1 is the only trimable output.
Output Vo2 and Vo3 only follow how Vo1 is
trimmed.

Radj dn

Vo adj

(

) A

Vo nom

adj

ohm

Where R

adj-down

is the trim-down resistance value

and A, B, and D are constants defined in Table
10.

With an external resistor (R

adj-up

) between the

Trim Pin and Vo1 Pin the output voltage set
point (Vo,adj) increases. The following equation
determines the required external resistor value to
obtain an adjusted output voltage:

Raj up

A D

Vo adj

(

)

ohm

Where R

adj-up

is the trim-up resistance value and

A, B, C, and D are constants defined in Table 10:

4990

25500

2.5

Table 10 Output Adjustment Variables.

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 6 of 12

www.power-one.com

Thermal Considerations

The power converter operates in various thermal
environments. Sufficient cooling should be
provided to help ensure reliable operation of the
converter. Major heat-dissipating components are
thermally coupled to the metal substrate. Heat is
removed from the metal substrate by conduction,
convection, and radiation to the surrounding
environment. Proper cooling can be verified by
measuring the temperature of the substrate. It is
recommended the substrate temperature be
maintained below 100 ºC for reliable operation.
When necessary, an additional heat sink can be
attached to the substrate to achieve desired
thermal performance.

Heat Transfer Characteristics

Increasing airflow over the converter enhances
the heat transfer via convection. Figure 4 shows
the maximum power that can be dissipated by the
converter without exceeding the maximum

substrate temperature versus local ambient
temperature (T

Use of Figures 4 and 5 to properly determine
proper airflow for cooling the converter at a given
output power and a maximum ambient
temperature is illustrated in the following example.

Example

What is the minimum airflow required for the
device operating with an input voltage range of
33V to 75V, an output power of 60 W, at a
maximum ambient temperature of 70 ºC?

Solution:

Given: Vi = 33V-75V, Po = 60 W, T

= 70 ºC.

Step 1 (Determining P

): From Figure 5,

the maximum power dissipation is 12W (occurs at
Vin = 33V)

Step 2 (Determine airflow): From Figure

4, to maintain the substrate temperature below
100C, the airflow has to be greater than 160LFM
(interpolated between curves for 100LFM and
200LFM).

Test Setup

Figure 1 Input Reflected Ripple Current Test Set-up:

Note: Measure input reflected-ripple current with a simulated inductance (Ltest) of 12 uH. Capacitor Cs offsets possible
battery impedance. Measure current as shown above.

BATTERY

Cs 220 uF

ESR < 0.1 OHM

@ 20 ºC, 100

kHz

Ltest

12 uH

22uF

ESR < 0.7 OHM

@ 20 ºC, 100 kHz

Vi(+)

Vi(-)

TO CURRENT PROBE

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 7 of 12

www.power-one.com

H B T 1 7 Z G H H - A

C 1

V i n +

V i n -

V I N

C 2

F C 1 0 0 V 1 0

C A S E

G N D

C 3

C 4

C 5

C 6

V o 1

- V o 1

V o 2

- V o 2

V o 3

- V o 3

L O A D 1

L O A D 2

L O A D 3

Figure 2: Output Ripple Measurement Test Set-up:
Note: Use a 0.1uf ceramic capacitor. Scope measurement should be made using a BNC socket. Position
loads between 51 mm and 76 mm (2 in. and 3 in.) from module.

Figure 3: Input filter configuration required to meet CISPR 22 Class A for Conducted Emissions.

Part List for Input Filter

Ref. Des

Description

Manufacture

C1, 2

0.47uF @100V MLC Capacitor (1812)

AVX or Equivalent (Equiv.)

100uF @ 100V Alum. Electrolytic Capacitor

Nichicon NRSZ Series or Equiv.

22uF@ 100V Alum. Electrolytic Capacitor

United Chemicon KMG Series or Equiv.

C5, 6

0.01uF MLC Capacitor

AVX or Equiv.

FC100V10 Input Filter Module

Power-One

DUT

LOAD1

LOAD2

LOAD3

0.1uf

ceramic

0.1uf

ceramic

0.1uf

ceramic

SCOPE

COPPER STRIPS (2 to 3 inches)

+Vo1

-Vo1

+Vo2

-Vo2

+Vo3

-Vo3

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 8 of 12

www.power-one.com

Thermal Considerations

Figure 4. Maximum Allowable Power Dissipation to maintain substrate at 100

Figure 5. Power Dissipation vs. Output Power (substrate temperature maintained at 100 ºC)

HBT060ZGHH-A - Power Derating

100

Ambient Temperature (C)

Power Dissipation (W)

Natural

100 LFM

200 LFM

300 LFM

400 LFM

HBT060ZGHH-A Power Dissipation vs Output Power

Baseplate @ 100 °C

Output Power (W)

Power Dissipation (W)

Vin,min

Vin,nom

Vin,max

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 11 of 12

www.power-one.com

Characteristic Curves

= 25 ºC, nominal input voltage, and rated load unless otherwise specified.

Figure 8 Efficiency vs. FL Power Distribution

H B T 0 6 0 Z G H H - A T y p i c a l C r o s s R e g u l a t i o n

0.5/5

6/2.5

12/0

V o1

Vo2
Vo3

HBT060ZG HH-A E fficiency vs Full Load Pow er Distribution

Baseplate @ 100 °C

0.5/5

1/4.6

2/4.2

3/3.8

4/3.3

5/2.9

6/2.5

7/2.1

8/1.7

9/1.3

10/0.8

11/0.4

12/0

Output P ower (W )

Efficiency (%)

V in,m in

V in,nom

V in,m ax

Figure 9. Typical Cross Regulation

Data Sheet

HBT Series Half-Brick DC/DC Converter

48V Input
60 Watt Triple Output

REV. 10/01 Page 12 of 12

www.power-one.com

Mechanical Drawing

PIN VIEW

Tolerances:

.xx

.020 (.5)

.xxx

.010 (.25)

Pin diameter:

.0.002 (.05)

Ordering Information

Options

Suffixes to add to part number
Positive- Standard, no suffix required

Remote On/Off

Negative- Add "N" suffix
0.18"- Standard, no suffix required
0.11"- Add "8" suffix

Pin Length

0.15"- Add "9" suffix

Notes

Consult factory for the complete list of available options.

Power-One products are not authorized for use as critical components in life support systems, equipment used in hazardous
environments, or nuclear control systems without the express written consent of the President of Power-One, Inc.

Specifications are subject to change without notice.

Pin

Function

On/off

-Vin

+Vin

-Vo2

+Vo2

Trim

+Vo1

-Vo1

+Vo3

-Vo3

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