DCP02 Series DCP 02 DCP 02 www.ti.com Miniature, 2W Isolated UNREGULATED DC/DC CONVERTERS FEATURES DESCRIPTION ● ● ● ● The DCP02 series is a family of 2W, unregulated, isolated DC/DC converters. Requiring a minimum of external components and including on-chip device protection, the DCP02 series provides extra features such as output disable and synchronization of switching frequencies. UP TO 89% EFFICIENCY THERMAL PROTECTION DEVICE-TO-DEVICE SYNCHRONIZATION SO-28 POWER DENSITY OF 106W/in3 (6.5W/cm3) ● EN55022 CLASS B EMC PERFORMANCE ● UL1950 RECOGNIZED ● JEDEC 14-PIN AND SO-28 PACKAGES The use of a highly integrated package design results in highly reliable products with power densities of 79W/in3 (4.8W/cm3) for DIP-14, and 106W/in3 (6.5W/cm3) for SO-28. This combination of features and small size makes the DCP02 suitable for a wide range of applications. APPLICATIONS ● ● ● ● POINT-OF-USE POWER CONVERSION GROUND LOOP ELIMINATION DATA ACQUISITION INDUSTRIAL CONTROL AND INSTRUMENTATION ● TEST EQUIPMENT 800kHz Oscillator SYNC/DISABLE ÷2 Reset VOUT Power Stage 0V Watch-dog/ start-up PSU Thermal Shutdown IBIAS VS Power Controller IC 0V Copyright © 2000, Texas Instruments Incorporated SBVS011A Printed in U.S.A. November, 2001 SPECIFICATIONS At TA = +25°C, unless otherwise specified. DCP02 SERIES PARAMETER CONDITIONS OUTPUT Power Ripple MIN TYP 100% Full Load O/P Capacitor = 1µF, 50% Load INPUT Voltage Range on VS MAX 2 20 W mVp-p –10 ISOLATION Voltage 1s Flash Test 60s Test, UL1950(1) 10 1 1 1 Switching Frequency = fOSC/2 %/1% of VS 800 0 0.4 VSYNC = +2V 75 2 External RELIABILITY Demonstrated 10 TA = +55°C 75 °C mA 150 3 –40 INPUT VOLTAGE (V) OUTPUT VOLTAGE (V) VS +85 LOAD REGULATION (%) NO LOAD CURRENT (mA) 10% TO 100% LOAD VNOM °C EFFICIENCY (%) BARRIER CAPACITANCE (pF) 0% LOAD 100% LOAD VISO = 750VRMS IQ 75% LOAD(2) kHz V µA µs pF FITS THERMAL SHUTDOWN IC Temperature at Shutdown Shutdown Current TEMPERATURE RANGE Operating % kVrms kVrms LINE Regulation SWITCHING/SYNCHRONIZATION Oscillator Frequency (fOSC) Sync Input Low Sync Input Current Disable Time Capacitance Loading on Sync Pin UNITS CISO PRODUCT MIN TYP MAX MIN TYP MAX TYP MAX TYP TYP TYP DCP020503P, U 4.5 5 5.5 3.13 3.3 3.46 19 30 18 74 26 DCP020505P, U 4.5 5 5.5 4.75 5 5.25 14 20 18 80 22 DCP020507P, U 4.5 5 5.5 6.65 7 7.35 14 25 20 81 30 DCP020509P, U 4.5 5 5.5 8.55 9 9.45 12 20 23 82 31 DCP020515DP, U 4.5 5 5.5 ±14.25 ±15 ±15.75 11 20 27 85 24 DCP021205P, U 10.8 12 13.2 4.75 5 5.25 7 15 14 83 33 DCP021212P, U 10.8 12 13.2 11.4 12 12.6 7 20 15 87 47 DCP021212DP, U 10.8 12 13.2 ±11.4 ±12 ±12.6 6 20 16 88 35 DCP021515P, U 13.5 15 16.5 14.25 15 15.75 6 20 15 88 42 DCP022405P 21.6 24 26.4 4.85 5 5.35 6 10 13 81 33 DCP022405U 21.6 24 26.4 4.75 5 5.25 10 15 13 81 33 DCP022405DP, U 21.6 24 26.4 ±4.75 ±5 ±5.25 6 15 12 80 22 DCP022415DP, U 21.6 24 26.4 ±14.25 ±15 ±15.75 6 20 16 79 44 NOTES: (1) During UL1950 recognition tests only. (2) 100% Load Current = 2W/VNOM TYP. 2 DCP02 SBVS011A PIN CONFIGURATION (Single-DIP) PIN CONFIGURATION (Dual-DIP) Top View DIP VS 1 0V 2 Top View 14 SYNC DIP VS 1 0V 2 DCP02 DCP02 0V 5 0V 5 +VOUT 6 +VOUT 6 NC 7 –VOUT 7 8 NC PIN DEFINITION (Single-DIP) PIN # PIN NAME 1 2 5 6 7 8 14 VS 0V 0V +VOUT NC NC SYNC DESCRIPTION PIN # Voltage Input Input Side Common Output Side Common +Voltage Out Not Connected Not Connected Synchronization Pin 1 2 5 6 7 8 14 Top View PIN NAME NC DESCRIPTION Voltage Input Input Side Common Output Side Common +Voltage Out –Voltage Out Not Connected Synchronization Pin VS 0V 0V +VOUT –VOUT NC SYNC PIN CONFIGURATION (Dual-SO) SO Top View SO VS 1 28 SYNC VS 1 28 SYNC 0V 2 27 NC 0V 2 27 NC 0V 3 26 NC 0V 3 26 NC DCP02 DCP02 0V 12 17 NC 0V 12 17 NC +VOUT 13 16 NC +VOUT 13 16 NC NC 14 15 NC –VOUT 14 15 NC PIN DEFINITION (Single-SO) PIN # PIN NAME 1 2 3 12 13 14 15 16 17 26 27 28 VS 0V 0V 0V +VOUT NC NC NC NC NC NC SYNC SBVS011A 8 PIN DEFINITION (Dual-DIP) PIN CONFIGURATION (Single-SO) DCP02 14 SYNC DESCRIPTION Voltage Input Input Side Common Input Side Common Output Side Common +Voltage Out Not Connected Not Connected Not Connected Not Connected Not Connected Not Connected Synchronization Pin PIN DEFINITION (Dual-SO) PIN # PIN NAME 1 2 3 12 13 14 15 16 17 26 27 28 VS 0V 0V 0V +VOUT –VOUT NC NC NC NC NC SYNC DESCRIPTION Voltage Input Input Side Common Input Side Common Output Side Common +Voltage Out –Voltage Out Not Connected Not Connected Not Connected Not Connected Not Connected Synchronization Pin 3 ELECTROSTATIC DISCHARGE SENSITIVITY ABSOLUTE MAXIMUM RATINGS Input Voltage 5V Input Models .................................................................................. 7V 12V Input Models .............................................................................. 15V 15V Input Models .............................................................................. 18V 24V Input Models .............................................................................. 29V Storage Temperature ...................................................... –60°C to +125°C Lead Temperature (soldering, 10s) ................................................. 270°C ORDERING INFORMATION DCP02 05 05 ( D ) ( Basic Model Number: 2W Product Voltage Input: 5V In Voltage Output: 5V Out Dual Output: Package Code: P = DIP-14 U = SO-28 ) This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION PRODUCT PACKAGE PACKAGE DRAWING NUMBER SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ORDERING NUMBER(1) TRANSPORT MEDIA Single DCP020503P DIP-14 010-1 –40°C to +85°C DCP020503P DCP020503P Rails DCP020503U SO-28 217-2 –40°C to +85°C DCP020503U DCP020503U/1K Tape and Reel DCP020505P DIP-14 010-1 –40°C to +85°C DCP020505P DCP020505P Rails DCP020505U SO-28 217-2 –40°C to +85°C DCP020505U DCP020505U/1K Tape and Reel DCP020507P DIP-14 010-1 –40°C to +85°C DCP020507P DCP020507P Rails DCP020507U SO-28 217-2 –40°C to +85°C DCP020507U DCP020507U/1K Tape and Reel DCP020509P DIP-14 010-1 –40°C to +85°C DCP020509P DCP020509P Rails DCP020509U SO-28 217-2 –40°C to +85°C DCP020509U DCP020509U/1K Tape and Reel DCP021205P DIP-14 010-1 –40°C to +85°C DCP021205P DCP021205P Rails DCP021205U SO-28 217-2 –40°C to +85°C DCP021205U DCP021205U/1K Tape and Reel DCP021212P DIP-14 010-1 –40°C to +85°C DCP021212P DCP021212P Rails DCP021212U SO-28 217-2 –40°C to +85°C DCP021212U DCP021212U/1K Tape and Reel DCP021515P DIP-14 010-1 –40°C to +85°C DCP021515P DCP021515P Rails DCP021515U SO-28 217-2 –40°C to +85°C DCP021515U DCP021515U/1K Tape and Reel DCP022405P DIP-14 010-1 –40°C to +85°C DCP022405P DCP022405P Rails DCP022405U SO-28 217-2 –40°C to +85°C DCP022405U DCP022405U/1K Tape and Reel Dual DCP020515DP DIP-14 010-1 –40°C to +85°C DCP020515DP DCP020515DP Rails DCP020515DU SO-28 217-2 –40°C to +85°C DCP020515DU DCP020515DU/1K Tape and Reel DCP021212DP DIP-14 010-1 –40°C to +85°C DCP021212DP DCP021212DP Rails DCP021212DP SO-28 217-2 –40°C to +85°C DCP021212DU DCP021212U/1K Tape and Reel DCP022405DP DIP-14 010-1 –40°C to +85°C DCP022405DP DCP022405DP Rails DCP022405DU SO-28 217-2 –40°C to +85°C DCP022405DU DCP022405U/1K Tape and Reel DCP022415DP DIP-14 010-1 –40°C to +85°C DCP022415DP DCP022415DP Rails DCP022415DU SO-28 217-2 –40°C to +85°C DCP022415DU DCP022415U/1K Tape and Reel NOTES: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /1K indicates 1000 devices per reel). Ordering 1000 pieces of “DCP020503U/1K” will get a single 1000-piece Tape and Reel. 4 DCP02 SBVS011A TYPICAL PERFORMANCE CURVES At TA = +25°C, unless otherwise noted. 60 5.04 50 5.02 40 5.00 30 20 10 4.98 4.96 0 4.94 –10 4.92 –20 0.15 4.90 1 10 30 –40 0 20 40 60 80 Temperature (°C) DCP021205P VOUT vs LOAD DCP021205P POWER OUT vs TEMPERATURE (400mA Load) 5.4 2.5 5.3 2.0 5.2 1.5 5.1 5.0 100 1.0 0.5 4.9 0 0 20 40 60 80 100 –50 Load (%) –25 0 25 50 Temperature (°C) 75 100 DCP020505P OUTPUT AC RIPPLE (20MHz Band) DCP0212 EFFICIENCY vs LOAD 450 100 DCP1212DP 400 80 350 DCP1205P 0.1µF Ripple (mVp-p) Efficiency (%) –20 Frequency (MHz) POUT (W) VOUT (V) DCP020505P VOUT vs TEMPERATURE (75% Load) VOUT (V) Emission Level, Peak (dBµA) DCP020505P CONDUCTED EMISSIONS (500mA Load) 60 40 300 250 200 150 100 20 1µF 50 0 0 0 25 50 Load (%) DCP02 SBVS011A 75 100 0 200 400 Load Current (mA) 5 SYNCHRONIZATION FUNCTIONAL DESCRIPTION OVERVIEW The DCP02 offers up to 2W of unregulated output power from a 5V, 12V, 15V, or 24V input source with a typical efficiency of up to 89%. This is achieved through highly integrated packaging technology and the implementation of a custom power stage and control IC. The circuit design utilizes an advanced BiCMOS/DMOS process. POWER STAGE This uses a push-pull, center-tapped topology switching at 400kHz (divide by 2 from 800kHz oscillator). OSCILLATOR AND WATCHDOG The onboard 800kHz oscillator generates the switching frequency via a divide by 2 circuit. The oscillator can be synchronized to other DCP02 circuits or an external source, and is used to minimize system noise. A watchdog circuit checks the operation of the oscillator circuit. The oscillator can be stopped by pulling the SYNC pin LOW. The output pins will be tri-stated. This will occur in 2µs. The DCP02 overcomes this by allowing devices to be synchronized to one another. Up to eight devices can be synchronized by connecting the SYNC pins together, taking care to minimize the capacitance of tracking. Significant stray capacitance (> 10pF) will have the effect of reducing the switching frequency, or even stopping the oscillator circuit. It is also recommended that power and ground lines are star connected. If synchronized devices are used, it should be noted that, at start up, all devices will draw maximum current simultaneously. This can cause the input voltage to dip and should it dip below the minimum input voltage (4.5V), the devices may not start up. A 2.2µF capacitor should be connected close to the input pins. If more than eight devices are to be synchronized, it is recommended that the SYNC pins are driven by an external device. Details are contained in a separate applications bulletin (AB-153). CONSTRUCTION THERMAL SHUTDOWN The DCP02 is protected by a thermal shutdown circuit. If the on-chip temperature exceeds 150°C, the device will shut down. Once the temperature falls below 150°C, normal operation will resume. VSUPPLY In the event that more than one DC/DC converter is needed onboard, beat frequencies and other electrical interference can be generated. This is due to the variation in switching frequencies between the DC/DC converters. The DCP02’s basic construction is the same as standard ICs. There is no substrate within the molded package. The DCP02 is constructed using an IC, rectifier diodes, and a wound magnetic toroid on a leadframe. As there is no solder within the package, the DCP02 does not require any special PCB assembly processing. This results in an isolated DC/DC converter with inherently high reliability. VOUT 1 VS SYNC DCP 02 0V 0V VOUT1 + VOUT 2 VS SYNC 0V VOUT 2 DCP 02 0V COM FIGURE 1. Connecting the DCP02 in Series. 6 DCP02 SBVS011A ADDITIONAL FUNCTIONS DISABLE/ENABLE The DCP02 can be disabled or enabled by driving the SYNC pin using an open drain CMOS gate. If the SYNC pin is pulled low, the DCP02 will be disabled. The disable time depends upon the external loading; the internal disable function is implemented in 2µs. Removal of the pull down will cause the DCP02 to be enabled. Capacitive loading on the SYNC pin should be minimized in order to prevent a reduction in the oscillator frequency. DECOUPLING Ripple Reduction The high switching frequency of 400kHz allows simple filtering. To reduce ripple, it is recommended that a 1µF capacitor is used on VOUT. Dual outputs should both be decoupled to pin 5. A 2.2µF capacitor on the input is recommended. VSUPPLY Connecting the DCP02 in Series Multiple DCP02 isolated 2W DC/DC converters can be connected in series to provide nonstandard voltage rails. This is possible by utilizing the floating outputs provided by the DCP02’s galvanic isolation. Connect the positive VOUT from one DCP02 to the negative VOUT (0V) of another (see Figure 1). If the SYNC pins are tied together, the self-synchronization feature of the DCP02 will prevent beat frequencies on the voltage rails. The SYNC feature of the DCP02 allows easy series connection without external filtering, minimizing cost. The outputs on dual output DCP02 versions can also be connected in series to provide two times the magnitude of VOUT as shown in Figure 2. For example, a dual 15V DCP022415D could be connected to provide a 30V rail. Connecting the DCP02 in Parallel If the output power from one DCP02 is not sufficient, it is possible to parallel the outputs of multiple DCP02s, as shown in Figure 3. Again, the SYNC feature allows easy synchronization to prevent power-rail beat frequencies at no additional filtering cost. VS DCP 02 +VOUT +VOUT –VOUT –VOUT 0V 0V VS VOUT COM FIGURE 2. Connecting Dual Outputs in Series. VSUPPLY SYNC DCP 02 0V 0V VS VOUT 2 x Power Out SYNC 0V DCP 02 0V COM FIGURE 3. Connecting Multiple DCP02s in Parallel. DCP02 SBVS011A 7 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, license, warranty or endorsement thereof. Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations and notices. Representation or reproduction of this information with alteration voids all warranties provided for an associated TI product or service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use. Resale of TI’s products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use. Also see: Standard Terms and Conditions of Sale for Semiconductor Products. www.ti.com/sc/docs/stdterms.htm Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2001, Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, license, warranty or endorsement thereof. Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations and notices. Representation or reproduction of this information with alteration voids all warranties provided for an associated TI product or service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use. Resale of TI’s products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use. Also see: Standard Terms and Conditions of Sale for Semiconductor Products. www.ti.com/sc/docs/stdterms.htm Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2001, Texas Instruments Incorporated