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BTCPower
HB75-24 Series
TM
Broadband TelCom Power, Inc.
Redefining "Current" Limits In Power Conversion
Technical Specification
24Vin 2.5, 3.3, 5.0, 12, 15, 24Vout 75W
Description
The HB75 Series of low cost half brick DC/DC converters are comparable to existing half-bricks. They are targeted specifically at the telecommunication, industrial electronics, mobile telecommunication and distributed power markets. With a wide input voltage range of 18-36V they are available with output voltage of either 2.5, 3.3, 5, 12, 15 or 24Volts. All models feature an input filter, input undervoltage lockout, output overvoltage and overtemperature protection, output current limiting and short circuit protection. The unique open-frame construction with aluminum heat spreader design achieves efficient heat transfer with no hot spots.
Features
* Delivers up to 75W in half brick * No minimum load required * Low profile of only 0.50 inch * 2.5V, 3.3V, 5V, 12V, 15V or 24V output models * Wide input operating range 36-75V * -40C to +100C ambient operation * On/Off pin and remote sense * Output adjustment +10% and -10% range * 1500V, 10M input-to-output isolation * Meets Basic Insulation requirements of EN60950 * UL 1950 recognized, TUV EN60950 and CSA C22.2 No. 60950-00 Certified (pending) * Meets conducted limits of FCC Class B and CEI IEC61204-3 Class B with external filter * MTBF of 1,000,000 hours @ 50C (Bellcore)
Applications
* * * * * * * Telecommunications Data Communications Wireless Communications Networking Gear Servers, Switches and Data Storage Semiconductor Test Equipment Distributed Power Architecture
Broadband TelCom Power, Inc. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.
Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com * PS HB75-24 Rev2 16-1-04
Technical Specification
HB75-24 Series 24Vin 2.5, 3.3, 5, 12, 15, 24Vout 75W
BTCPower
CONVERTER SELECTION
TM
Typical @ Ta=+25C under nominal line voltage and 75% load conditions, unless noted.
Model Part Number Voltage (Volts) Nominal 24 24 24 24 24 24 Range 18-36 18-36 18-36 18-36 18-36 18-36 Input Current (A) No load 0.1 0.1 0.1 0.1 0.1 0.1 Full load 2.09 2.61 3.81 3.67 3.67 3.64 Output Voltage (Volts) 2.5 3.3 5.0 12 15 24 Current (Amps) 15 15 15 6.25 5.0 3.13 Efficiency 75% Load (%) 77 79 82 85 85 85
Positive Logic
HB75-24-25 HB75-24-33 HB75-24-05 HB75-24-12 HB75-24-15 HB75-24-24
Negative Logic
HB75-24-25N HB75-24-33N HB75-24-05N HB75-24-12N HB75-24-15N HB75-24-24N
Consult factory for other output voltage configurations.
Outline and Pin-out Information
Pin Connection Pin# Function 1 2 3 4 5 6 7 8 9 Vin + On/Off Case Vin Vout Sense Trim Sense + Vout +
All dimensions are in inches [mm] Pin 5 and 9 are dia. 0.08 [2.03] All other pins are all dia. 0.040 [1.02] Pin material: Brass Pin finish: Tin/Lead plated Heat spreader (baseplate) material: Aluminum Weight: 60.5g
Tolerance Inches Millimeters *XX 0.020 *X 0.5 *XXX 0.010 *XX 0.25 Pin: 0.002 0.05
The information and specifications contained in this specification are believed to be accurate and reliable at the time of publication. Specifications are subject to change without notice.
Broadband TelCom Power, Inc. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 2 of 8 Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com * PS HB75-24 Rev2 16-1-04
Technical Specification
HB75-24 Series 24Vin 2.5, 3.3, 5, 12, 15, 24Vout 75W
BTCPower
TM
Electrical Specification
Typical test data at Ta=25C, Vin=24V unless otherwise noted.
PARAM ETER
Absolute maximum rating Input voltage Operating case temperature Storage temperature Humidity Input characteristics Operating input voltage range Turn on voltage threshold Turn off voltage threshold Off converter input current Output characteristics Output voltage HB75-24-25 or HB75-24-25N HB75-24-33 or HB75-24-33N HB75-24-05 or HB75-24-05N HB75-24-12 or HB75-24-12N HB75-24-15 or HB75-24-15N HB75-24-24 or HB75-24-24N Output current HB75-24-25 or HB75-24-25N HB75-24-33 or HB75-24-33N HB75-24-05 or HB75-24-05N HB75-24-12 or HB75-24-12N HB75-24-15 or HB75-24-15N HB75-24-24 or HB75-24-24N Output voltage trim range Output voltage ripple and noise Output over power protection Over-voltage protection Over-temperature protection Temperature coefficient Output dynamic characteristics Startup time Transient recovery time Transient Peak Efficiency HB75-24-25 or HB75-24-25N HB75-24-33 or HB75-24-33N HB75-24-05 or HB75-24-05N HB75-24-12 or HB75-24-12N HB75-24-15 or HB75-24-15N HB75-24-24 or HB75-24-24N Isolation characteristics Isolation voltage(primary to secondary) 1minute 24Vin
NOTES
MIN
0 -40 -40
TYP
MAX
50 100 105 95 36 17.5 17
UNIT
V C C % V V V mA
18 16 5
18-36Vin, no load to full load 18-36Vin, no load to full load 18-36Vin, no load to full load 18-36Vin, no load to full load 18-36Vin, no load to full load 18-36Vin, no load to full load
2.47 3.25 4.85 11.7 14.5 23.5 0 0 0 0 0 0
2.50 3.30 5.00 12.0 15.0 24.0
2.53 3.35 5.15 12.3 15.5 24.5
V V V V V V A A A A A A % mV(pk-pk) mV(pk-pk) % % C %/C ms s mv % % % % % %
15 15 15 6.25 5.0 3.13
+10 100 150 240 140 150 110 0.05
Percentage of normal output 20Mz bandwidth, 100% Load, 48Vin, for 2.5,3.3,5,12,15V For 24V
-10
110
120 130 105
5% to 95% of the output voltage 25% load change (2.0A/us) 25% load change (2.0A/us) 77 79 82 89 85 86
20 800 400
1500
VDC
Broadband TelCom Power, Inc. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 3 of 8 Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com * PS HB75-24 Rev2 16-1-04
Technical Specification
HB75-24 Series
Isolation voltage (primary to case) Isolation voltage (secondary to case) Isolation resistance 1minute 1minute 500VDC, Primary to secondary 10
BTCPower
24Vin 2.5, 3.3, 5, 12, 15, 24Vout 75W
1000 500
TM
VDC VDC M
Broadband TelCom Power, Inc. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 4 of 8 Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com * PS HB75-24 Rev2 16-1-04
Technical Specification
HB75-24 Series 24Vin 2.5, 3.3, 5, 12, 15, 24Vout 75W
BTCPower
TM
Basic operation and functions
The HB family uses planar transformer technology to achieve high output current. The whole unit switches at the fixed frequency for a predictable EMI performance. The HB Brick has many standard controls and protection functions. Input Power ( pin1, pin4 ) Input power Vin(+) must be connected to Positive input voltage pin1; Input power Vin(-) must be connected to Negative input voltage pin4. Output Power ( pin9, pin5 )
according to the specification, will turn the unit on or off. The positive logic version turns on when pin 2 is at logic high, and turns off when pin 2 is at logic low. The unit is on when pin 2 is left open. The negative logic version turns on when pin 2 is at logic low and turns off when pin 2 is at logic high. The pin 2 can be directed to Vin(-), to enable automatic turn on to the unit without the need of an external control signal. Remote Sense ( pin 8, pin 6 )
Output power Vout(+) must be connected to Positive output voltage pin9; Output power Vout(-) must be connected to Negative output voltage pin5. On/Off ( pin 2 ) Permits the user to maintain unit On/Off, in order to properly sequence different power supplies and reduce power consumption during the standby condition. There are two remote control options available, positive logic and negative logic is referenced to Vin(-), and typical connections are shown in Fig 1.
Permits the user to maintain the accurate output voltage at the remote load terminals regardless of the line drop. The Sense(-) (pin6) and Sense(+) (pin8) should be connected at the load or at the point where the regulation is needed. ( shown on Fig. 2)
Fig 2: Remote Sense Circuit
Fig. 1: Typical Circuit for On/Off Function
The remote sense feature of the unit compensates for voltage drop occurring between the output pins of the unit and load. The Sense(-) (pin5) and Sense(+)(pin7) should be connected at the load or at the point where regulation is required. If remote Sense is not required, the Sense(-) pin must be connected to the Vout(-) pin (pin5), and
Pin 2 is the "Enable" pin, connecting a TTL compatible pin. A TTL control signal to this pin,
Broadband TelCom Power, Inc. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 5 of 8 Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com * PS HB75-24 Rev2 16-1-04
Technical Specification
HB75-24 Series 24Vin 2.5, 3.3, 5, 12, 15, 24Vout 75W
BTCPower
TM
the Sense(+) pin must be connected to the Vout(+) pin(pin 9) to ensure the unit will regulate at the specified output voltage. If these connections are not made, the unit's output voltage will be higher than the specified value. The unit output over voltage protection senses the voltage across Vout(+) and Vout(-), and not across the sense lines, so the resistance between the output pins of the unit and the load should be minimized to prevent unwanted triggering of the OVP. When using the remote sense feature, the output voltage at the unit can be increased by as much as 10% above the normal rating, in order to maintain the required voltage across the load. Therefore, the designer must consider this condition. Also when using the remote sense function, the output power must be taken care of, as not to exceed the maximum power capability of the unit. Output Voltage Trim (pin 7) Permits the user to adjust the output voltage up or down to achieve the custom voltage or to make the output voltage margining. The adjustment range is from + 10% to -10%. Output voltage can be adjusted up or down, by connecting the Rtrim-up or Rtrim-down resistor as shown. Rtrim-up makes the output voltage go up to 10%; and the Rtrim-down makes the output voltage go down to 10%. Leave Trim pin ( Pin 7) open for normal output voltage.
When trimming up, care must be taken, not to exceed the unit OVP threshold. A typical circuit is shown in Fig. 3.
Fig 3. Trim Up Output Voltage Circuit
Trimming down the output voltage for a typical circuit, as shown on Fig. 4.
Fig 4. Trim Down Output Voltage Circuit
Broadband TelCom Power, Inc. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 6 of 8 Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com * PS HB75-24 Rev2 16-1-04
Technical Specification
HB75-24 Series 24Vin 2.5, 3.3, 5, 12, 15, 24Vout 75W
BTCPower
TM
Protection Features
Input Under-voltage lockout ( IUV ) Input under voltage ( IUV ) is standard with the HB unit. The unit will shut down when the input voltage drops below a threshold, and the unit will turn on when the input voltage goes to the upper threshold. The hysteretic voltage of the under voltage protection is 1.5V, normally from the 16V to 17V range. Output Over-current Protection ( OCP ) The unit will shut down when the over current or short circuit condition exists. Once the OCP happens, the unit has shut down. The attempted restart will continue indefinitely until the over current or short circuit condition is removed. When OCP happens, the output voltage drops below 1.1V. Input voltage has almost no effect on the current limit point. Output Over-voltage Protection ( OVP ) The unit will shut down when the output voltage exceeds the over voltage threshold. If the output voltage across Vout(+) (pin9) and Vout(-) (pin5) exceeds the threshold of the OVP circuitry, the unit has shut down which is caused by an OVP circuit, and the unit will never restart, and the output voltage is below 0.5V. Over Temperature Protection ( OTP ) The unit will shut down when the base plate temperature exceeds the protection threshold. The unit will shut down under the base plate temperature over a 105C condition to protect the unit from overheating. The OTP circuit will turn the unit off when OTP happens. Once the unit has shut down, it will restart at the cycle when the base plate temperature goes down.
Broadband TelCom Power, Inc. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 7 of 8 Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com * PS HB75-24 Rev2 16-1-04
Technical Specification
HB75-24 Series 24Vin 2.5, 3.3, 5, 12, 15, 24Vout 75W
BTCPower
TM
Application information
Input Source Impedance The unit has been designed to be stable with no external capacitors when used in a low inductance input and output circuit. However in many applications, the inductance with the distribution from the power source to the input of the unit can affect the stability of the unit. The addition of 47uF electrolytic capacitor with an Esr < 1 (at 100khz) across the input can ensure the stability of the unit. Also in many applications, the user has to use decoupling capacitors at the output load, to ensure the hold up time for the load. Safety Requirements and Considerations The unit meets the American and International safety regulatory requirement UL1950. Basic insulation is also provided between the input side and the output side. To meet safety agencies requirements, an input line fuse must be used external to the unit. An 8A fuse or less with a normal blow rate must be used to meet the safety agencies requirements. A minimum 42LFM airflow should also be provided if the unit is intended to operate at full power without heatsink. * If the input source is non-SELV ( ELV or a hazardous voltage greater than 60 Vdc and less than or equal to 75 Vdc), for the unit output to be considered meeting the requirements of safety extra low voltage (SELV), all of the following must be met: * The input source is to be provided with reinforced insulation from any hazardous voltage, including the ac main. The input pins of the unit are not operator accessible. For whole system, for safety agencies requirements, and for the combination of the unit's input side (primary side) and the unit's output side (secondary side), verify that under a single fault, hazardous voltages do not appear at the unit's output side (secondary side). Never ground either of the input pins of the unit without grounding one of the output pins. This may allow a non-SELV voltage to appear between the output pin and ground.
* *
Broadband TelCom Power, Inc. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 8 of 8 Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com * PS HB75-24 Rev2 16-1-04

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