PKJ 4000 PI 37.5-150W DC/DC Power Modules 48V Input Series • • • • • • • High efficiency 91.5% Typ (5V) at full load Industry standard footprint Max case temperature +100ºC Wide input voltage range according to ETSI specifications High power density, up to 55W/in3 1,500 Vdc isolation voltage MTBF > 3 million hours in accordance with Bellcore TR-332 The PKJ series represents a “third generation” of High Density DC/DC Power Modules providing 90% efficiency. To achieve this high efficiency, Ericsson uses proprietary drive and control circuits with planar magnetics and low resistivity multilayer PCB technology, and a patent pending topology with active rectification. The PKJ series can be used without bulky and height consuming heatsinks, resulting in a lower total cost. This also provides narrow board spacing for electronic, shelf based applications. The PKJ series also offers the flexibility of using a heatsink when needed, enabling reduced airflow, extended reliability or higher ambient temperature operation in a wide range of 48V and 60V DC powered systems. Similar to other Ericsson Power Modules, the PKJ series includes an undervoltage shut down facility, protecting the associated batteries from being too deeply discharged. The PKJ series also offers over-voltage protection, over-temperature protection and is short circuit proof. The products are in the industry standard package size and offer a beneficial alternative to competing products on the market. Because for certain applications they may not require heatsinks, they are ideal for cost sensitive or highdensity applications. These products are manufactured using highly automated manufacturing lines with a world-class quality commitment and a five-year warranty. Ericsson Components AB has been an ISO 9001 certified supplier since 1991. For product program please see back cover. General Absolute Maximum Ratings Characteristics min max Unit TC Maximum Operating Case Temperature -40 +100 °C TS Storage temperature -40 +125 °C VI Continuous input voltage -0.5 +75 Vdc VISO Isolation voltage (input to output test voltage) 1,500 Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as no destruction limits, are normally tested with one parameter at a time exceeding the limits of Output data or Electrical Characteristics. If exposed to stress above these limits, function and performance may degrade in an unspecified manner. For design margin and to enhance system reliability, it is recommended that the PKJ series DC/DC power modules are operated at case temperatures below 90°C. Vdc VRC Remote control voltage 15 Vdc I 2t 1 A2s Inrush transient Input TC < TCmax Characteristics Conditions min typ max VI Input voltage range1) VIoff Turn-off input voltage Ramping from higher voltage VIon Turn-on input voltage Ramping from lower voltage CI Input capacitance IIac Reflected ripple current 5 Hz to 20 MHz-150W IImax Maximum input current VI = VI PIi Input idling power IO = 0 2.5 7.5 W PRC Input stand-by power VI = 50V (turned off with RC) RC open .05 2.5 W TRIM 36 min 50 75 100 150 31 72 33 34 Vdc Vdc 36 µF 20 mA p-p W W W W 1.6 2.4 3.2 5.3 6 A Vdc Environmental Characteristics Random Vibration 2 Test procedure & conditions IEC 68-2-34Ed Frequency Spectral density Duration Safety Vdc 2.8 Maximum input voltage on trim pin Characteristics 1) See also Input Voltage in the Operating Information section Unit 10...500 Hz 0.025 g2/Hz 10 min in each direction Sinusoidal Vibration IEC 68-2-6 Fc Frequency Amplitude Acceleration # of cycles 10-500 Hz 0.75mm 10g 10 in each axis Shock (half sinus) IEC 68-2-27 Ea Peak acceleration Duration 50 g 3ms Temperature change IEC 68-2-14 Na Temperature Number of cycles -40°C...+100°C 300 Accelerated damp heat IEC 68-2-3 Ca with bias Temperature Humidity Duration 85°C 85% RH 500 hours Solder resistibility IEC 68-2-20 Tb method IA Temperature, solder Duration 260° C 10...13 s The PKJ Series DC/DC power modules are designed to comply with EN 60 950 Safety of information technology equipment including electrical business equipment. The PKJ DC/DC power modules are also recognized by UL and meet the applicable requirements in UL 1950, Safety of information technology equipment and applicable Canadian safety requirements. The isolation is an operational insulation in accordance with EN 60 950. The DC/DC power module should be installed in end-use equipment, in compliance with the requirements of the ultimate application, and is intended to be supplied by an isolated secondary circuit. Consideration should be given to measuring the case temperature to comply with TCmax when in operation. When the supply to the DC/DC power module meets all the requirements for SELV (<60Vdc), the output is considered to remain within SELV limits (level 3). If connected to a 60V DC power system, reinforced insulation must be provided in the power supply that isolates the input from the mains. Single fault testing in the power supply must be performed in combination with the DC/DC power module to demonstrate that the output meets the requirement for SELV. One pole of the input and one pole of the output is to be grounded or both are to be kept floating. Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 Safety (continued) The galvanic isolation is verified in an electric strength test. The test voltage (VISO) between input and output is 1,500 Vdc for 60 sec. Leakage current is less than 1µA @ 50Vdc. Flammability ratings of the terminal support and internal plastic construction details meet UL 94V-0. A fuse should be used at the input of each PKJ series power module. If a fault occurs in the power module, that imposes a short on the input source, this fuse will provide the following two functions: • Isolate the failed module from the input source so that the remainder of the system may continue operation. • Protect the distribution wiring from overheating. A fast blow fuse should be used with a rating of 10A or less. It is recommended to use a fuse with the lowest current rating, that is suitable for the application. Mechanical Data Connections Weight Designation Function -In Case RC Negative input Connected to base plate Remote control (primary). To turn-on and turn-off the output Positive input Negative output Negative remote sense (if sense not needed, connect to -Out) Output voltage adjust Positive remote sense (if sense not needed, connect to +Out) Positive output +In -Out -Sen Trim +Sen +Out Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 85 grams Case Aluminum baseplate with metal standoffs. Pins Pin material: Brass Pin plating: Tin/Lead over Nickel. 3 Thermal Data The PKJ series DC/DC power modules has a robust thermal design which allows operation at case (baseplate) temperatures (TC) up to +100°C. The main cooling mechanism is convection (free or forced) through the case or optional heatsinks. The graph above shows the allowable maximum output current to maintain a maximum +100°C case temperature. Note that the ambient temperature is the air temperature adjacent to the power module which is typically elevated above the room environmental temperature. The graphs below can be used to estimate case temperatures for given system operating conditions (see Thermal design). For further information on optional heatsinks, please contact your local Ericsson sales office. Thermal Design The thermal data can be used to determine thermal performance without a heatsink. Case temperature is calculated by the following formula: TC = TA + Pd x RthC-A where Pd = PO(1/η - 1) Where: TC: Case Temperature TA: Local Ambient Temperature Pd: Dissipated Power RthC-A: Thermal Resistance from TC to TA The efficiency η can be found in the tables on the following pages. For design margin and to enhance system reliability, it is recommended that the PKJ series DC/DC power modules are operated at case temperatures below 90°C. 4 Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 PKJ 4719 PI (75W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 2.5 2.55 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 2.45 Output adjust range IO = 0 to IOmax 2.0 2.75 V Output voltage tolerance band IO = 0 to IOmax 2.38 2.63 V Line regulation VI = 36...72V, IO = IOmax 2 15 mV Load regulation VI = 53V, IO = 0 to IOmax 2 15 mV Vtr Load transient voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ttr Load transient recovery time ts Start-up time IO Output current POmax Max output power At VO = VOnom Ilim Current limit threshold VO = 0.90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection f<1 kHz OVP Overvoltage protection VO From VI connection to VO = 0.9 x VOnom ±160 mVpeak 50 µs 35 55 ms 30 A 75 W 35 41 A 35 41 A 75 150 mVp-p 0 31 f < 20 MHz -53 3.0 dB 3.3 3.9 V Miscellaneous Characteristics Conditions min typ η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency 84 87 % IO = IOmax, VI = 53V 11.2 W IO = 0.1...1.0 x IOmax 150 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 max Unit 5 PKJ 4519 PI (50W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 2.50 2.55 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 2.45 Output adjust range IO = 0 to IOmax 2.0 2.75 V Output voltage tolerance band IO = 0 to IOmax 2.38 2.63 V Line regulation VI = 36...72VIO = 0 to IOmax 2 15 mV Load regulation VI = 53V, IO = 0 to IOmax 2 15 mV Vtr Load transient voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ±100 mVpeak ttr Load transient recovery time 50 µs ts Start-up time IO Output current POmax Max output power At VO = VOnom IIim Current limit threshold VO = 0.90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection f<1 kHz OVP Overvoltage protection VO From VI connection to VO = 0.9 x VOnom 30 55 ms 20 A 50 W 25 31 A 25 31 A 75 150 mVp-p 0 21 f < 20 MHz -53 3.0 dB 3.3 3.9 V Miscellaneous 6 Characteristics Conditions min typ η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency max Unit 86 89 % IO = IOmax, VI = 53V 6.2 W IO = 0.1...1.0 x IOmax 150 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 PKJ 4319 PI (37.5W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 2.50 2.55 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 2.45 Output adjust range IO = 0 to IOmax 2.0 2.75 V Output voltage tolerance band IO = 0 to IOmax 2.38 2.63 V Line regulation VI = 36...72V, IO = IOmax 2 15 mV Load regulation VI = 53V, IO = 0 to IOmax 2 15 mV Vtr Load transient voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ±90 mVpeak ttr Load transient recovery time 50 µs tS Start-up time VO From VI connection to VO = 0.9 x VOnom IO Output current POmax Max output power At VO = VOnom IIim Current limit threshold VO = 0.90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection f<1 kHz OVP Overvoltage protection 30 55 ms 15 A 37.5 W 17 24 A 17 25 A 75 150 mVp-p 0 16 f < 20 MHz 53 3.0 dB 3.3 3.9 V Miscellaneous Characteristics Conditions min typ η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency 86 89 % IO = IOmax, VI = 53V 4.6 W IO = 0.1...1.0 x IOmax 150 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 max Unit 7 PKJ 4910 PI (99W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 3.30 3.35 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 3.25 Output adjust range IO = 0 to IOmax 2.64 3.63 V Output voltage tolerance band IO = 0 to IOmax 3.2 3.4 V Line regulation VI = 36...72V, IO = IOmax 1 10 mV Load regulation VI = 53V, IO = 0 to IOmax 1 10 mV Vtr Load transient voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ±180 mVpeak ttr Load transient recovery time 50 µs VO tS Start-up time From VI connection to VO = 0.9 x VOnom 35 IO Output current POmax Max output power At VO = VOnom IIim Current limit threshold VO = 0.90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection (ac) f<1kHz -53 OVP Over voltage protection VI = 53V 3.9 60 ms 30 A 100 W 35 39 A 35 41 A 75 150 mVp-p 0 31 f < 20 MHz dB 4.4 5.0 V Miscellaneous 8 Characteristics Conditions min typ η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency max Unit 86 89 % IO = IOmax, VI = 50V 12.2 W IO = 0.1...1.0 x IOmax 150 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 PKJ 4610 PI (66W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 3.30 3.35 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 3.25 Output adjust range IO = 0 to IOmax 2.64 3.63 V Output voltage tolerance band IO = 0 to IOmax 3.2 3.4 V Line regulation VI = 36...72V, IO = IOmax 1 10 mV Load regulation VI = 53V, IO = 0 to IOmax 1 10 mV Vtr Load transient Voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ±140 mVpeak ttr Load transient recovery time 50 µs ts Start-up time VO From VI connection to VO = 0.9 x VOnom IO Output current POmax Max output power At VO = VOnom IIim Current limit threshold VO = 0.90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection (ac) f<1kHz OVP Over voltage protection 35 60 ms 20 A 66.6 W 24 30 A 28 32 A 75 150 mVp-p 0 21 f < 20 MHz -53 3.9 dB 4.4 5.0 V Miscellaneous Characteristics Conditions η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency min max Unit 90.5 % IO = IOmax, VI = 53V 6.93 W IO = 0.1...1.0 x IOmax 150 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 88 typ 9 PKJ 4510 PI (50W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 3.30 3.35 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 3.25 Output adjust range IO = 0 to IOmax 2.64 3.63 V Output voltage tolerance band IO = 0 to IOmax 3.2 3.4 V Line regulation VI = 36...72V, IO = IOmax 1 10 mV Load regulation VI = 53V, IO = 0 to IOmax 1 10 mV Vtr Load transient Voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ±100 mVpeak ttr Load transient recovery time 50 µs ts Start-up time VO From VI connection to VO = 0.9 x VOnom IO Output current POmax Max output power At VO = VOnom IIim Current limit threshold VO = 0.90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection (ac) f<1kHz OVP Over voltage protection 35 60 ms 15 A 50 W 19 22 A 21 23 A 75 150 mVp-p 0 16 f < 20 MHz -53 dB 3.9 4.4 min typ 5.0 V Miscellaneous 10 Characteristics Conditions η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency 88 max Unit 90.5 % IO = IOmax, VI = 53V 5.2 W IO = 0.1...1.0 x IOmax 150 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 PKJ 4111 API (150W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 5.0 5.1 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 4.9 Output adjust range IO = 0.1 to IOmax 4.0 5.5 V Output voltage tolerance band IO = 0.1 to IOmax 4.85 5.15 V Line regulation VI = 36...72V, IO = IOmax 5 20 mV Load regulation VI = 53V, IO = 0.1 to IOmax 5 20 mV Vtr Load transient voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ±200 mVpeak ttr Load transient recovery time 50 µs ts Start-up time IO Output current VO From VI connection to VO = 0.9 x VOnom 55 90 ms 30 A 150 W 35 42 A 35 41 A 75 150 mVp-p 0 POmax Max output power At VO = VOnom IIim Current limit threshold VO = .90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection (ac) f<1 kHz OVP Over voltage protection 31 f < 20 MHz -53 5.8 dB 6.1 7 V Miscellaneous Characteristics Conditions η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency min max Unit 90.5 % IO = IOmax, VI = 53V 15.7 W IO = 0.1...1.0 x IOmax 200 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 88 typ 11 PKJ 4111 PI (100W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 5.0 5.1 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 4.9 Output adjust range IO = 0 to IOmax 4.0 5.5 V Output voltage tolerance band IO = 0 to IOmax 4.85 5.15 V Line regulation VI = 36...72V, IO = IOmax 5 20 mV Load regulation VI = 53V, IO = 0.1 to IOmax 5 20 mV Vtr Load transient voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ttr Load transient recovery time ts Start-up time IO Output current VO From VI connection to VO = 0.9 x VOnom ±120 mVpeak 20 µs 55 90 ms 20 A 100 W 25 32 A 25 31 A 75 150 mVp-p 0 POmax Max output power At VO = VOnom IIim Current limiting threshold VO = 0.90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection (ac) f<1 kHz OVR Over voltage protection 21 f < 20 MHz -53 5.8 dB 6.1 7 V Miscellaneous 12 Characteristics Conditions min η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency 89 typ max Unit 91.5 % IO = IOmax, VI = 53V 9.3 W IO = 0.1...1.0 x IOmax 200 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 PKJ 4711 PI (75W) TC = -40...+100°C, VI = 36...72 V dc unless otherwise specified. Output Characteristics VOi Conditions Output min typ max Unit 5.0 5.1 V Output voltage initial setting and accuracy TC = +25°C, VI = 53V, IO = IOmax 4.9 Output adjust range IO = 0 to IOmax 4.0 5.5 V Output voltage tolerance band IO = 0 to IOmax 4.85 5.15 V Line regulation VI = 36...72V, IO = IOmax 5 20 mV Load regulation VI = 53V, IO = 0.1 to IOmax 5 20 mV Vtr Load transient voltage deviation Load step = 0.25 x IOmax dI/dt = 1A/µs ±100 mVpeak ttr Load transient recovery time 15 µs ts Start-up time IO Output current VO From VI connection to VO = 0.9 x VOnom 55 90 ms 15 A 75 W 20 26 A 22 25 A 75 150 mVp-p 0 POmax Max output power At VO = VOnom IIim Current limiting threshold VO = 0.90 x VOnom @ TC<100°C ISC Short circuit current VOac Output ripple and noise IO = IOmax SVR Supply voltage rejection (ac) f† 1 kHz OVP Over voltage protection 16 f < 20 MHz -53 5.8 dB 6.1 7 V Miscellaneous Characteristics Conditions min typ η Efficiency TA = +25°C, VI = 53V, IO = IOmax Pd Power dissipation fO Switching frequency 89 91.5 % IO = IOmax, VI = 53V 7.0 W IO = 0.1...1.0 x IOmax 200 kHz Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 max Unit 13 Typical Characteristics PKJ 4719 PI (75W) PKJ 4519 PI (50W) PKJ 4319 PI (37.5W) 14 Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 PKJ 4910 PI (99W) 4 3 2 1 PKJ 4610 PI (66W) 4 3 2 1 PKJ 4510 PI (50W) 4 3 2 1 Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 15 PKJ 4111 API (150W) PKJ 4111 PI (100W) PKJ 4711 PI (75W) 16 Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 EMC Specifications The PKJ power module is mounted on a double sided printed circuit board PCB with groundplane during EMC measurements. The fundamental switching frequency is 200 kHz @ IO = IOmax. Conducted EMI Input terminal value with 100µF capacitor (typ) and additional PI filter. dBuV 0.15MHz 1.0MHz 10MHz 30MHz EMI Filter for PKJ Module L1: 425µH, 8.1A (Coilcraft P3217A) L2: 22µH, 7A (Coilcraft D055022-223) Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 17 Operating Information Output Voltage Adjust (Trim) Voltage Trimming Input Voltage The input voltage range 36...72V meets the requirements in the European Telecom Standard ETS 300 132-2 for normal input voltage range in -48 V and -60 V DC power systems, -40.5...-57.0 V and -50.0...-72.0 V respectively. At input voltages exceeding 72 V, (abnormal voltage), the power loss will be higher than at normal input voltage and TC must be limited to absolute max +90º C. The absolute max continuous input voltage is 75 V DC. Output characteristics will be marginally affected at input voltages exceeding 72 V. Remote Control (RC) All PKJ series DC/DC power modules have an Output Voltage Adjust pin. This pin can be used to adjust the output voltage above or below VOi. When increasing the output voltage, the voltage at the output pins (including any remote sensing offset) must be kept below the overvoltage trip point. Also note that at elevated output voltages the maximum power rating of the module remains the same, and the output current capability will decrease correspondingly. To decrease VO connect Radj from - SEN to Trim To increase VO connect Radj from + SEN to Trim The RC pin can be wired directly to -In, to allow the module to power up automatically without the need for control signals. A mechanical switch or an open collector transistor or FET can be used to drive the RC inputs. The device must be capable of sinking up to 1mA at a low level voltage of 1.0V, maximum of 15 V dc, for the primary RC. Standard Remote Control RC (primary) Power module Low Open/High ON OFF Optional Remote Control RC (primary) Power module Low Open/High OFF ON Remote Sense All PKJ series DC/DC power modules have remote sense that can be used to compensate for moderate amounts of resistance in the distribution system and allow for voltage regulation at the load or other selected point. The remote sense lines will carry very little current and do not need a large cross sectional area. However, the sense lines on a PCB should be located close to a ground trace or ground plane. In a discrete wiring situation, the usage of twisted pair wires or other technique for reducing noise susceptibility is recommended. Decrease : Radj = (21*VO-2.5)/(2.5-VO) k ohm Increase : Radj = (9.7*VO+1.225)/(0.49*VO-1.225) k ohm The power module will compensate for up to 0.5 V voltage drop between the sense voltage and the voltage at the power module output pins. The output voltage and the remote sense voltage offset must be less than the minimum overvoltage trip point. If the remote sense is not needed the -Sen should be connected to -Out and +Sen should be connected to +Out. Current Limiting General Characteristics All PKJ series DC/DC power modules include current limiting circuitry that makes them able to withstand continuous overloads or short circuit conditions on the output. The output voltage will decrease toward zero for heavy overloads (see product code characteristics). Decrease : Radj = (11VO-3.3)/(3.3-VO) k ohm Increase : Radj = 15.94*(VO+0.207)/(VO-3.3) k ohm The power module will resume normal operation after removal of the overload. The load distribution system should be designed to carry the maximum short circuit output current specified (see applicable code typical characteristics). Over Voltage Protection (OVP) All PKJ DC/DC power modules have latching output overvoltage protection. In the event of an overvoltage condition, the power module will shut down. The power module can be restarted by cycling the input voltage. Turn-off Input Voltage (VIoff) The power module monitors the input voltage and will turn on and turn off at predetermined levels. 18 Decrease : Radj = (11VO-4.965)/(4.965-VO) k ohm Increase : Radj = (7.286*VO+1.225)/(0.2467*VO-1.225) k ohm Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 Paralleling for Redundancy The figure below shows how n + 1 redundancy can be achieved. The diodes on the power module outputs allow a failed module to remove itself from the shared group without pulling down the common output bus. This configuration can be extended to additional numbers of power modules and they can also be controlled individually or in groups by means of signals to the primary RC inputs. Low resistance and low inductance PCB (printed circuit board) layouts and cabling should be used. Remember that when using remote sensing, all the resistance, inductance and capacitance of the distribution system is within the feedback loop of the power module. This can have an effect on the modules compensation and the resulting stability and dynamic response performance. As a rule of thumb, 100 µF/A of output current can be used without any additional analysis. For example, with a 30A (max PO 150W) power module, values of decoupling capacitance up to 3000 µF can be used without regard to stability. With larger values of capacitance, the load transient recovery time can exceed the specified value. As much of the capacitance as possible should be outside of the remote sensing loop and close to the load.The absolute maximum value of output capacitance is 10,000 µF. For values larger than this contact your local Ericsson representative. Output Ripple & Noise (VOac) Output ripple is measured as the peak to peak voltage from 0 to 20MHz which includes the noise voltage and fundamental. Quality Over Temperature Protection Reliability The PKJ DC/DC power modules are protected from thermal overload by an internal over temperature shutdown circuit. When the case temperature exceeds +110°C, the power module will automatically shut down (latching). To restart the module the input voltage must be cycled. The internal temperature is a few degrees higher than the case (baseplate) temperature. The calculated MTBF of the PKJ module family is 3 million hours using Bellcore TR-332 methodology. The calculation is valid for an ambient temperature of 40°C and an output load 80% of rated maximum. Input and Output Impedance The impedance of both the power source and the load will interact with the impedence of the DC/DC power module. It is most important to have the ratio between L and C as low as possible, i.e. a low characteristic impedance, both at the input and output, as the power modules have a low energy storage capability. The PKJ series of DC/DC power modules has been designed to be completely stable without the need for external capacitors on the input or output when configured with low inductance input and output circuits. The performance in some applications can be enhanced by the addition of external capacitance as described below. If the distribution of the input voltage source to the power module contains significant inductance, the addition of a 220-470 µF capacitor across the input of the power module will help insure stability. Tantalum capacitors are not recommended due to their low ESR-value. This capacitor is not required when powering the module from a low impedance source with short, low inductance, input power leads. Output Capacitance When powering loads with significant dynamic current requirements, the voltage regulation at the load can be improved by the addition of decoupling capacitance at the load. The most effective technique is to locate low ESR ceramic capacitors as close to the load as possible, using several capacitors to lower the effective ESR. These ceramic capacitors will handle the short duration high frequency components of the dynamic current requirement. In addition, higher values of electrolytic capacitors should be used to handle the mid frequency components. It is equally important to use good design practices when configuring the DC distribution system. Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999 Quality Statement The power modules are designed and manufactured in an industrial environment where quality systems and methods like ISO 9000, 6σ, and SPC, are intensively in use to boost the continuous improvements strategy. Infant mortality or early failures in the products are screened out and they are subjected to an ATE-based final test. Conservative design rules, design reviews and product qualifications, plus the high competence of an engaged work force, contribute to the high quality of our products. Warranty Ericsson Components warrants to the original purchaser or end user that the products conform to this Data Sheet and are free from material and workmanship defects for a period of five (5) years from the date of manufacture, if the product is used within specified conditions and not opened. In case the product is discontinued, claims will be accepted up to three (3) years from the date of the discontinuation. For additional details on this limited warranty we refer to Ericsson Components AB’s “General Terms and Conditions of Sales”, EKA 950701, or individual contract documents. Limitation of Liability Ericsson Components does not make any other warranties, expressed or implied including any warranty of merchantability or fitness for a particular purpose (including, but not limited to use in life support applications, where malfunctions of product can cause injury to a person’s health or life). 19 Product Program VI 48/60 V 48/60 V 48/60 V 48/60 V 48/60 V 48/60 V 48/60 V 48/60 V 48/60 V VO/IO 2.5V/30A 2.5V/20A 2.5V/15A 3.3V/30A 3.3V/20A 3.3V/15A 5V/30A 5V/20A 5V/15A POmax 75W 50W 37.5W 100W 66W 50W 150W 100W 75W Ordering Number PKJ 4719 PI PKJ 4519 PI PKJ 4319 PI PKJ 4910 PI PKJ 4610 PI PKJ 4510 PI PKJ 4111 API PKJ 4111 PI PKJ 4711 PI To order with Optional Remote Control add P to end of ordering number for example PKJ 4719 PIP. Ericsson Energy Systems’ Sales Offices: Brazil: Denmark: Finland: France: Germany: Great Britain: Hong Kong: Italy: Japan: Norway: Russia: Spain: Sweden: United States: Phone: +55 11 681 0040 Phone: +45 33 883 109 Phone: +358 9 299 4098 Phone: +33 1 4083 7720 Phone: +49 211 534 1516 Phone: +44 1793 488 300 Phone: +852 2590 2356 Phone: +39 2 7014 4203 Phone: +81 3 5216 9091 Phone: +47 66 841 906 Phone: +7 095 247 6211 Phone: +34 91 339 1858 Phone: +46 8 721 6258 Phone: +1 888 853 6374 Ericsson Components AB Energy Systems Division SE-164 81 Kista-Stockholm, Sweden Phone: +46 8 721 6258 Fax: +48 8 721 7001 Internet: www.ericsson.com/energy Fax: +55 11 681 2051 Fax: +45 33 883 105 Fax: +358 9 299 4188 Fax: +33 1 4083 7741 Fax: +49 211 534 1525 Fax: +44 1793 488 301 Fax: +852 2590 7152 Fax: +39 2 7014 4260 Fax: +81 3 5216 9096 Fax: +47 66 841 909 Fax: +7 095 247 6212 Fax: +34 91 339 3145 Fax: +46 8 721 7001 Fax: +1 972 583 7999 Information given in this data sheet is believed to be accurate and reliable. No respnsibility is assumed for the consequences of its use nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Ericsson Components. These products are sold only according to Ericsson Components’ general conditions of sale, unless otherwise confirmed in writing. Specifications subject to change without notice. Preliminary Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999