TECHNICAL DATASHEET LANC4812DW8 DC/DC Converter 36-75 VDC Input ±12 VDC Output at ±0.333A Features: UL TUV CB CE MARK Applications: • RoHS Compliant • Dual Output • Standard 24 Pin DIP and SMT Package • Five-Sided Continuous Shield • No Minimum Load Required • High Power Density • High Efficiency up to 87% • Small Size: 1.25 x 0.8 x 0.450 Inches • Input to Output Isolation (1600VDC) • 2:1 Wide Input Voltage Range • Fixed Switching Frequency • Distributed Power Architectures • Input Under-Voltage Protection • Communications Equipment • Over-Current Protection • Computer Equipment • Output Short Circuit Protection • Work Stations • Remote ON/OFF Description: The LANCW8 dual output series offers 8 watts of output power from a package in an IC compatible 24 pin DIP and SMT configuration. LANCW8 dual output series has 2:1 wide input voltage of 9-18VDC, 18-36VDC, and 36-75VDC. The LANCW8 dual output series features 1600VDC of isolation, short circuit protection, and five sided shielding. All models are particularly suited for telecommunications, industrial, mobile telecom, and test equipment applications. (888) 597-WALL www.wallindustries.com 1 of 14 TECHNICAL DATASHEET LANC4812DW8 Technical Specifications Model No. LANC4812DW8 All specifications are based on 25 oC, Nominal Input Voltage and Maximum Output Current unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION Related condition Min Nom Max Unit Switching Frequency Test at nominal Vin and full load 300 kHz INPUT (Vin) Operating Voltage Range 36 48 75 Vdc Input Voltage (Continuous) 80 Vdc Input Voltage (Transient 100ms) 100 Vdc Input Standby Current Nominal Vin and No Load 18 mA Input Voltage Variation Complies with EST300 132 part 4.4 5 V/ms Input Current Nominal Vin and Full Load 200 mA 5 to 20MHz, 12µH source impedance Reflected Ripple Current 20 mApk-pk (See the Test Setup section - pg 8) Test at nominal Vin and full load 87 % EFFICIENCY (See the Test Setup section – pg 8) OUTPUT (Vo) Operating Output Range Nominal Vin and Full Load 11.88 12.0 12.12 Vdc Load Regulation 0% to 100% Full Load -1.0 +1.0 % Line Regulation LL to HL at Full Load -0.2 +0.2 % Cross Regulation Asymmetrical Load 25% / 100% of Full Load -5.0 +5.0 % 5Hz to 20MHz bandwidth Output Ripple & Noise 50 mVpk-pk (See the Test Setup section - pg 8) Output Current 0 ±0.333 A Output Voltage Overshoot LL to HL at Full Load 0 3 % Vout Over Current Protection 150 % FL Short Circuit Protection Continuous, automatic recovery Test at nominal Vin DYNAMIC LOAD RESPONSE Peak Deviation Load step change from 75 to 100% or 100 to 75 % of FL 200 mV Setting Time (Vout < 10% peak deviation) 200 µs The ON/OFF pin voltage is referenced to -Vin REMOTE ON/OFF (See the Remote ON/OFF Control section - pg 5) ON/OFF pin High Voltage (Remote ON) 3.5 12 Vdc ON/OFF pin Low Voltage (Remote OFF) 0 1.2 Vdc ON/OFF pin Low Voltage, input current 2.5 mA Test at nominal Vin and constant resistive load START UP TIME Power Up 700 ms Remote ON/OFF 5 ms ISOLATION Isolation Voltage (Input-Output) 1600 Vdc Isolation Voltage (Output to Case–DIP Type) 1600 Vdc Isolation Voltage (Output to Case–SMT Type) 1000 Vdc Isolation Voltage (Input to Case - DIP Type) 1600 Vdc Isolation Voltage (Input to Case - SMT Type) 1000 Vdc Isolation Resistance 1 GΩ Isolation Capacitance 300 pF ENVIRONMENTAL o Operating Ambient Temperature (w/ derating) -40 85 C o Operating Case Temperature 100 C o Storage Temperature -55 105 C Temperature Coefficient -0.02 +0.02 % / oC See the MTBF and Reliability section (pg 13) MTBF Bellcore TR-NWT-000332, TC=40°C 3,050,000 hours MIL-STD-217F 1,880,000 hours MECHANICAL See Figure 1 Weight 18.0 grams Dimensions 1.25 x 0.8 x 0.450 inches (888) 597-WALL www.wallindustries.com Page 2 of 14 TECHNICAL DATASHEET LANC4812DW8 Figure 1: Mechanical Dimensions Pin size is 0.02(0.5) Dia or 0.01 x 0.02 (0.25 x 0.50) Rectangular Pin DIP Type 0.08(2.0) 1 2 3 Pin Connection 16 9 14 11 0.20 (5.1) BOTTOM VIEW 1.25 (31.8) Table 1 0.80 (20.3) 23 22 0.15 (3.8) 0.60(15.2) 0.40 (10.2) Pin 1 2 3 Define CTRL -Input -Input Pin Define 23 22 +Input +Input 9 11 Common -Output 16 14 Common +Output 0.80(20.3) 1. All dimensions are in Inches (mm) Tolerance: x.xx±0.02 (x.x±0.5) 2. Pin pitch tolerance ±0.014(0.35) SMT Type Suffix-S 0.44(11.2) 0.10 (2.54) 1.00(25.4) Pin Area 0.04 x 0.02 (1.0 x 0.5) BOTTOM VIEW 5 16 9 13 12 0.80(20.3) 1.26 (32.0) 20 1 0.15 (3.81) 24 0.43(10.9) Table 2 Pin Connection Pin 1 2 3 Define CTRL -Input -Input Pin Define 23 22 +Input +Input 9 11 Others Common -Output NC 16 14 Others Common +Output NC 0.25 (6.35) 0.02(0.5) 0.92(23.4) 1. All dimensions in Inches (mm) Tolerance: x.xx±0.02 (x.x±0.5) 2. Pin pitch tolerance ±0.014(0.35) (888) 597-WALL www.wallindustries.com Page 3 of 14 TECHNICAL DATASHEET LANC4812DW8 DESIGN CONSIDERATIONS: Output Over Current Protection When excessive output currents occur in the system, circuit protection is required on all power supplies. Normally, overload current is maintained at approximately 150% of rated current for the LANCW8 dual output series. Fold back-mode is a method of operation in a power supply whose purpose is to protect the power supply from being damaged during an over-current fault condition. It also enables the power supply to operate normally when the fault is removed. One of the problems resulting from over current is that excessive heat may be generated in power devices; especially MOSFET and Schottky diodes and the temperature of those devices may exceed their specified limits. A protection mechanism has to be used to prevent those power devices from being damaged. The operation of fold back is as follows. When the current sense circuit sees an over-current event, the output voltage of the module will be decreased for low power dissipation and decrease the heat of the module. Figure 2 Input Source Impedance The power module should be connected to a low impedance input source. Highly inductive source impedance can affect the stability of the power module. Input external L-C filter is recommended to minimize input reflected ripple current. The inductor is simulated source impedance of 12µH and capacitor is Nippon chemi-con KZE series 47µF/100V. The capacitor must as close as possible to the input terminals of the power module for lower impedance. Thermal Consideration The power module operates in a variety of thermal environments. However, sufficient cooling should be provided to help ensure reliable operation of the unit. Heat is removed by conduction, convention, and radiation to the surrounding environment. Proper cooling can be verified by measuring the point as the figure below. The temperature at this location should not exceed 105°C. When operating, adequate cooling must be provided to maintain the test point temperature at or below 105°C. Although the maximum point temperature of the power modules is 105°C, you can limit this temperature to a lower value for extremely high reliability. Figure 3 Measurement shown in inches and millimeters 0.4 (10.15) TOP VIEW 0.625 (15.9) (888) 597-WALL www.wallindustries.com Page 4 of 14 TECHNICAL DATASHEET LANC4812DW8 Remote ON/OFF Control The positive logic remote ON/OFF control circuit is included. Turns the module ON during a logic High on the On/Off pin and turns OFF during a logic Low. The On/Off pin is an open collector/drain logic input signal (Von/off) that’s referenced to GND. If not using the Remote On/Off feature, please open circuit between on/off pin and –input pin to turn the module on. Remote ON/OFF Implementation Figure 4 Isolated-Closure Remote ON/OFF Figure 5 Level Control using TTL Output (888) 597-WALL Figure 6 Level Control using Line Voltage www.wallindustries.com Page 5 of 14 TECHNICAL DATASHEET LANC4812DW8 Graph 2: Efficiency vs. Input Voltage (Full Load) Efficiency (%) Efficiency (%) Graph 1: Efficiency vs. Output Current Vin=36V Vin=48V Vin=75V % Of Full Load Input Voltage (V) Graph 4: Power Dissipation Vs. Output Current Power Dissipation (W) Output Power (%) Graph 3: Output Power vs. Ambient Temperature & Airflow (Nominal Vin) Natural Convection 100LFM 200LFM 300LFM 400LFM 500LFM 36V 48V 75V Ambient Temperature, Ta (°C) % Of Full Load Graph 5: Conducted Emission of EN55022 Class A (Nominal Vin and Full Load) Graph 6: Conducted Emission of EN55022 Class B (Nominal Vin and Full Load) Frequency Frequency (888) 597-WALL www.wallindustries.com Page 6 of 14 TECHNICAL DATASHEET LANC4812DW8 Graph 7: Typical Input Start-Up and Output Rise Characteristic (Nominal Vin and Full Load) Graph 8: Typical Output Ripple and Noise (Nominal Vin and Full Load) Vin Vout Graph 9: Using ON/OFF Voltage Start-Up and Vo Rise Characteristic (Nominal Vin and Full Load) Graph 10: Transient Response to Dynamic Load Change from 100% to 75% to 100% of Full Load at Nominal Vin Von-off Vout (888) 597-WALL www.wallindustries.com Page 7 of 14 TECHNICAL DATASHEET LANC4812DW8 TEST SETUP: The LANC4812DW8 specifications are tested with the following configurations: Input Reflected-Ripple Current Measurement Test Setup Figure 7 Component L C Value 12µH 47µF Voltage ---100V Reference ---Aluminum Electrolytic Capacitor Peak-to-Peak Output Ripple & Noise Measurement Setup Figure 8 Figure 9 Output Voltage and Efficiency Measurement Setup Figure 10 Vout × Iout Efficiency = × 100% Vin × Iin NOTE: All measurements are taken at the module terminals (888) 597-WALL www.wallindustries.com Page 8 of 14 TECHNICAL DATASHEET LANC4812DW8 EMC Considerations Suggested Schematic for EN55022 Conducted Emission Class A Limits Figure 11 Recommended Layout with Input Filter Figure 12 To meet Conducted Emissions EN55022 CLASS A needed the following components: LANC12xxDW8 Component C1 C2, C3 Value Voltage Reference 4.7uF 1000pF 25V 2KV 1210 MLCC 1206 MLCC LANC24xxDW8 Component C1 C2, C3 Value Voltage Reference N/A --- --- 1000pF 2KV 1206 MLCC LANC48xxDW8 Component Value Voltage Reference C1 N/A --- --- 1000pF 2KV 1206 MLCC C2, C3 (888) 597-WALL www.wallindustries.com Page 9 of 14 TECHNICAL DATASHEET LANC4812DW8 EMC Considerations (Continued) Suggested Schematic for EN55022 Conducted Emission Class B limits Figure 13 Recommended Layout with Input Filter Figure 14 To meet Conducted Emissions EN55022 CLASS B needed the following components: LANC12xxDW8 Component C1 C3, C4 L1 Value 4.7µF 1000pF 325µH Component C1 C3, C4 L1 Value 6.8µF 1000pF 325µH Component C1, C2 C3, C4 L1 Value 2.2µF 1000pF 325µH Voltage 50V 2KV ---- Reference 1812 MLCC 1206 MLCC Common Choke, P/N: PMT-050 LANC24xxDW8 Voltage 50V 2KV ---- Reference 1812 MLCC 1206 MLCC Common Choke, P/N: PMT-050 LANC48xxDW8 (888) 597-WALL Voltage 100V 2KV ---- Reference 1812 MLCC 1206 MLCC Common Choke, P/N: PMT-050 www.wallindustries.com Page 10 of 14 TECHNICAL DATASHEET LANC4812DW8 Recommended Pad Layout for DIP Type Figure 15 Recommended Pad Layout for SMT Type Figure 16 1. All dimensions in Inches (mm) 2. Pin pitch tolerance ±0.35mm 3. Tolerance: x.xx±0.02 (x.x±0.5) x.xxx±0.01 (x.xx±0.25) (888) 597-WALL www.wallindustries.com Page 11 of 14 TECHNICAL DATASHEET LANC4812DW8 Soldering and Reflow Considerations: Lead Free Wave Solder Profile for DIP Type TEMPERATURE (°C) Reference Solder: Sn-Ag-Cu; Sn-Cu Figure 17 Hand Welding: Soldering Iron: Power 90W Welding Time: 2~4 sec Temp: 380~400°C TIME (SEC) Zone Preheat Zone Actual Heating Reference Parameter Rise temp. speed: 3℃/sec max. Preheat temp: 100~130℃ Peak temp: 250~260℃ Peak time (T1+T2 time): 4~6 sec Figure 18 TEMPERATURE (°C) Lead free reflow profile for SMT type TIME (SEC) Zone Preheat Zone Actual Heating Cooling (888) 597-WALL Reference Parameter Reference Solder: Sn-Ag-Cu; Sn-Cu Rise temp. speed: 1~3℃/sec Preheat time: 60~120sec Preheat temp.155~185℃ Rise temp. speed: 1~3℃/sec Melting time: 30~60 sec Melting temp: 217°C Peak temp: 230~240℃ Peak time: 10~20 sec Rise temp. speed: -1~ -5℃/sec www.wallindustries.com Page 12 of 14 TECHNICAL DATASHEET LANC4812DW8 Packaging Information: DIP Type Figure 19 16 PCS per tube SMT Type Figure 20 16 PCS per tube Safety and Installation Instruction: Fusing Consideration Caution: This power module is not internally fused. An input line fuse must always be used. This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone operation to an integrated part of sophisticated power architecture. To maximum flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a normal-blow fuse with maximum rating of 3A. Based on the information provided in this data sheet on inrush energy and maximum DC input current; the same type of fuse with lower rating can be used. Refer to the fuse manufacturer’s data for further information. MTBF and Reliability The MTBF of the LANCW8 dual output series of DC/DC converters has been calculated using Bellcore TR-NWT-000332 Case I: 50% stress, Operating Temperature at 40°C (Ground fixed and controlled environment). The resulting figure for MTBF is 3.053 × 106 hours. MIL-HDBK 217F NOTICE2 FULL LOAD, Operating Temperature at 25°C. The resulting figure for MTBF is 1.878 × 106 hours. (888) 597-WALL www.wallindustries.com Page 13 of 14 TECHNICAL DATASHEET LANC4812DW8 Ordering Information: Part Number Example: LANC 48 12 D W 8 - S Series Designation Nominal Input Voltage Nominal Output Voltage Dual Output 2:1 Wide Input Voltage Range Option No suffix S Description DIP Type SMT Type Maximum Output Power Company Information: Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and development engineers will provide a solution that exceeds your performance requirements on-time and on budget. Our ISO9001-2000 certification is just one example of our commitment to producing a high quality, well documented product for our customers. Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for your project above and beyond the design and production phases. Give us a call today to discuss your future projects. Contact Wall Industries for further information: Phone: Toll Free: Fax: E-mail: Web: Address: (888) 597-WALL (603)778-2300 (888)587-9255 (603)778-9797 [email protected] www.wallindustries.com 5 Watson Brook Rd. Exeter, NH 03833 www.wallindustries.com Page 14 of 14