® DCP 011 DCP0115 Series 5 DCP 011 5 Miniature 15V Input, 1W Isolated UNREGULATED DC/DC CONVERTERS FEATURES DESCRIPTION ● STANDARD JEDEC PLASTIC PACKAGE ● LOW PROFILE: 0.15" (3.8mm) The DCP0115 family is a series of high efficiency, 15V input isolated DC/DC converters. In addition to 1W nominal galvanically isolated output power capability, the range of DC/DCs are also fully synchronizable. The devices feature thermal shutdown, and overload protection is implemented via watchdog circuitry. Advanced power-on reset techniques give superior reset performance and the devices will start into any capacitive load up to full power output. ● SYNCHRONIZABLE ● OUTPUT SHORT CIRCUIT PROTECTION ● THERMAL SHUTDOWN ● STARTS INTO ANY CAPACITIVE LOAD ● EFFICIENCY: 76% (at Full Load) ● 1000Vrms ISOLATION The DCP01 family is implemented in standard-molded IC packaging, giving outlines suitable for high volume assembly. ● 400kHz SWITCHING ● 93 MILLION HOURS MTTF ● AVAILABLE IN TAPE AND REEL APPLICATIONS ● POINT OF USE POWER CONVERSION ● GROUND LOOP ELIMINATION ● DATA ACQUISITION ● INDUSTRIAL CONTROL AND INSTRUMENTATION ● TEST EQUIPMENT SYNCOUT ÷2 Reset 800kHz Oscillator +VOUT Power Stage 0V Watch-dog/ start-up SYNCIN PSU Thermal Shutdown –VOUT IBIAS VS Power Controller IC 0V International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111 Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 © 1997 Burr-Brown Corporation PDS-1382C Printed in U.S.A. January, 1999 SPECIFICATIONS At TA = +25°C, VS = +15V, unless otherwise specified. DCP0115 SERIES PARAMETER CONDITIONS OUTPUT Power MIN VS + 4% 100% Full Load Voltage (VNOM)(1) DCP011512D DCP011515D Voltage vs Temperature Short Circuit Duration Ripple INPUT Nominal Voltage (VS) Voltage Range Supply Current Reflected Ripple Current ISOLATION Voltage(2) Continuous Voltage(3) Insulation Resistance Input/Output Capacitance LOAD REGULATION DCP011512D DCP011515D SWITCHING/SYNCHRONIZATION Oscillator Frequency (fOSC) Sync Input Low Sync Input Current Reset Time SYNCOUT Frequency GENERAL No Load Current DCP011512D DCP011515D Efficiency DCP011512D DCP011515D MTTF(3) Weight TYP MAX 1 0.92 75% Full Load 75% Full Load ±10 ±13 VS ± 10% CL = O/P Capacitor = 10µF 100% Full Load Indefinite ±12 ±15 ±0.08 W W ±12.6 ±15.75 6 1s Flash Test V V %/°C mVp-p 15 83 8 V % mA mArms 1 >1 2.5 kVrms kVrms GΩ pF –10 100% Full Load CIN = I/P Capacitor = 1µF 50% Full Load UNITS 10 1 10% to 100% Load 10% to 25% Load 25% to 75% Load 75% to 100% Load 20 10 5 –7 39 % % % % 10% to 100% Load 10% to 25% Load 25% to 75% Load 75% to 100% Load 20 10 9 –4 39 % % % % Switching Frequency = fOSC/2 800 VSYNC = +2V 48 3.8 400 kHz V µA µs kHz 0% Load 0% Load 14 17 mA mA 100% Full Load 10% Full Load 100% Full Load 10% Full Load TA = +85°C TA = +55°C TA = +25°C 76 48 76 42 % % % % hrs hrs hrs 1.08 g 0 136,000 2,630,000 92,600,000 14-Pin PDIP THERMAL SHUTDOWN Die Temperature Shutdown Current 0.8 115 140 °C mA 100 °C 3 TEMPERATURE RANGE Operating –40 NOTES: (1) 100 % load current = 1W/VNOM typical. (2) Rated working voltage = 130Vrms (IEC950 convention). (3) Life test data. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ® DCP0115 2 PIN CONFIGURATION (Dual Out) PIN DEFINITION Top View PIN # DIP VS 1 0V 2 1 2 5 6 7 8 14 14 SYNCIN PIN NAME VS 0V 0V +VOUT –VOUT SYNCOUT SYNCIN DESCRIPTION Voltage Input. Input Side Common. Output Side Common. +Voltage Out. –Voltage Out. Unregulated 400kHz Output from Transformer. Synchronization Pin. DCP0115 0V 5 +VOUT 6 –VOUT 7 8 ELECTROSTATIC DISCHARGE SENSITIVITY SYNCOUT This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ABSOLUTE MAXIMUM RATINGS 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. Input Voltage ........................................................................................ 18V Storage Temperature ...................................................... –60°C to +150°C Lead Temperature (soldering, 10s) ................................................. 300°C ORDERING INFORMATION DCP01 15 15 D ( ) Basic Model Number: 1W Product Voltage Input: 15V In Voltage Output: 15V Out Dual Output: Package Code: P = 14-Pin Plastic DIP P-U = 14-Pin Plastic DIP Gull Wing PACKAGE/ORDERING INFORMATION PRODUCT Dual DCP011512D DCP011512D " DCP011515D DCP011515D " PACKAGE PACKAGE DRAWING NUMBER(1) SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ORDERING NUMBER(2) TRANSPORT MEDIA 14-Pin PDIP 14-Pin PDIP Gull Wing " 14-Pin PDIP 14-Pin PDIP Gull Wing " 010-1 010-2 " 010-1 010-2 " –40°C to +100°C –40°C to +100°C " –40°C to +100°C –40°C to +100°C " DCP011512DP DCP011512DP-U " DCP011515DP DCP011515DP-U " DCP011512DP DCP011512DP-U DCP011512DP-U/700 DCP011515DP DCP011515DP-U DCP011515DP-U/700 Rails Rails Tape and Reel Rails Rails Tape and Reel NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /700 indicates 700 devices per reel). Ordering 700 pieces of DCP011512DP-U/700 will get a single 700-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book. ® 3 DCP0115 TYPICAL PERFORMANCE CURVES At TA = +25°C, unless otherwise noted. DCP011515D EFFICIENCY vs LOAD 80 80 75 75 70 70 Efficiency (%) Efficiency (%) DCP011512D EFFICIENCY vs LOAD 65 60 55 60 55 50 50 45 45 40 40 0 10 20 30 40 50 60 70 80 90 100 10 0 20 30 60 70 80 Load (%) DCP011512D OUTPUT VOLTAGE vs LOAD DCP011515D OUTPUT VOLTAGE vs LOAD 90 100 90 100 18.0 17.5 Output Voltage (V) 13.5 13.0 +VOUT 12.5 –VOUT 12.0 11.5 17.0 16.5 16.0 +VOUT 15.5 –VOUT 15.0 14.5 11.0 14.0 0 10 20 30 40 50 60 70 80 90 100 10 0 20 30 50 40 Load (%) 60 70 80 Load (%) REFLECTED rms RIPPLE CURRENT vs LOAD PEAK-TO-PEAK RIPPLE VOLTAGE vs LOAD 60 200 180 50 CL = 100nF 160 rms Ripple Current (mA) Peak-to-Peak Ripple Voltage (mV) 50 40 Load (%) 14.0 Output Voltage (V) 65 140 120 100 80 60 CL = 1µF 40 CIN = 100µF 40 30 20 CIN = 1µF 10 CL = 10µF 20 0 0 0 10 20 30 40 50 60 70 80 90 0 100 ® DCP0115 10 20 30 40 50 Load (%) Load (%) 4 60 70 80 90 100 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, unless otherwise noted. DCP011512D OUTPUT VOLTAGE vs INPUT VOLTAGE (75% Load) DCP011515D OUTPUT VOLTAGE vs INPUT VOLTAGE (75% Load) 14.0 17.5 17.0 13.5 12.5 12.0 11.5 11.0 +VOUT 16.5 13.0 Output Voltage (V) Output Voltage (V) –VOUT +VOUT 16.0 15.5 15.0 14.5 –VOUT 14.0 10.5 13.5 10.0 13.5 14.0 14.5 15 15.5 16.0 13.0 13.5 16.5 14.0 14.5 Input Voltage (V) 15.5 16.0 16.5 OUTPUT POWER vs TEMPERATURE 101 1.0 100 0.9 99 0.8 Output Power (W) Frequency (%) SWITCHING FREQUENCY vs TEMPERATURE 98 97 96 95 0.7 0.6 0.5 0.4 0.3 94 0.2 93 0.1 92 0 –40 –20 0 20 40 60 80 100 120 –40 –20 0 20 40 60 Temperature (°C) Temperature (°C) DCP011512D LOAD BALANCE (+VOUT LOAD = 100%) DCP011512D LOAD BALANCE (+VOUT LOAD = 10%) 15 15 10 10 +VOUT 0 –5 80 100 +VOUT 5 VOUT (V) 5 VOUT (V) 15 Input Voltage (V) 0 –5 –VOUT –VOUT –10 –10 –15 –15 100 75 50 10 150 –VOUT Load (% of Full Load) 100 75 50 10 –VOUT Load (% of Full Load) ® 5 DCP0115 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, unless otherwise noted. DCP011515D LOAD BALANCE (+VOUT LOAD = 100%) DCP011515D LOAD BALANCE (+VOUT LOAD = 10%) 15 20 10 15 +VOUT VOUT (V) VOUT (V) +VOUT 10 5 0 –5 0 –5 –VOUT –VOUT –10 5 –10 –15 –15 –20 –20 100 75 50 10 150 –VOUT Load (% of Full Load) 75 –VOUT Load (% of Full Load) ® DCP0115 100 6 50 10 FUNCTIONAL DESCRIPTION THERMAL SHUTDOWN The DCP0115 is also protected by thermal shutdown. If the on-chip temperature reaches a predetermined value, the DC/ DC will shutdown. This effectively gives indefinite short circuit protection for the DC/DC. OVERVIEW The DCP0115 offers up to 1W of unregulated output power from a 15V input source with a typical efficiency of 76%. This is achieved through highly integrated packaging technology and the implementation of a custom power stage and control IC. SYNCHRONIZATION Any number of DCP01 family devices can be synchronized by connecting the SYNCIN pins on the devices together (see Figure 1). All the DCP01 devices will then self-synchronize. POWER STAGE This uses a pull-pull, center-tapped topology switching at 400kHz (divide by 2 from 800kHz oscillator). This same synchronization method applies to any VIN version of the DCP01 family, allowing synchronization of various VOUT and VIN DC/DCs. OSCILLATOR AND WATCHDOG The on-board 800kHz oscillator provides the switching frequency via a divide by 2 circuit and allows synchronization via the SYNCIN pins. To synchronize any number of DCP0115 family of devices, simply tie the SYNCIN pins together (see the Synchronization section). The watchdog circuitry protects the DC/DC against a stopped oscillator and checks the oscillator frequency which will shut down the output stage if it drops below a certain threshold—i.e., it will be tri-stated after approximately 10µs. +5V The SYNCOUT pin gives an unrectified 400kHz signal from the transformer. This can be used to set the timing of external circuitry on the output side. In noise sensitive applications any pick-up from the SYNCOUT pin can be minimized by putting a guard ring round the pin (see Figure 2). +15V 1 C5 470nF 2 1 per DCP01 VS SYNCIN 14 Bottom View 0V FIGURE 2. SYNCOUT Guard Ring. DCP0115xxx 5 0V +Out 1 C1 470nF 6 C2 470nF –Out 1 7 0V DIVIDE BY 2 RESET Isolated DC/DC converter performance normally suffers after power reset. This is because a change in the steady state transformer flux creates an offset after power-up. The DCP01 family does not suffer from this problem. This is achieved through a patented(1) technique employed on the divide by 2 reset circuitry resulting in no change in output phase after power interruption. +VOUT 8 –VOUT +5V +15V 1 2 C6 470nF VS SYNCIN 14 0V DCP0105xxx 5 0V +Out 2 C3 470nF 6 CONSTRUCTION 0V 1 2 The DCP0115’s basic construction is the same as standard ICs. There is no substrate within the molded package. The DCP0115 is constructed using an IC, rectifier diodes, and a wound magnetic toroid on a leadframe. As there is no solder within the package, the DCP0115 does not require any special PCB assembly processing. This results in an isolated DC/DC with inherently high reliability. Out+ 7 8 VS SYNCIN 14 0V DCP0105xxx 5 0V +Out 3 C4 470nF 6 7 ADDITIONAL FUNCTIONS 0V Out+ DISABLE/ENABLE The DCP0115 can be disabled or enabled by driving the SYNCIN pin with an open drain CMOS gate. If the SYNCIN pin is pulled low, the DCP0115 will disable. The disable time depends on the output loading but the internal shutdown takes 8 FIGURE 1. Standard Interface. ® 7 DCP0115 DECOUPLING up to 10µs. Making the gate open drain will re-enable the DCP0115. However, there is a trade-off in using this function; the DCP0115 quiescent current may increase and the on-chip oscillator may run slower. This degradation in performance is dependent on the external CMOS gate capacitance, therefore the smaller the capacitance, the lower the performance decrease. Driving the SYNCIN pin with a CPU type tri-state output, which has a low output capacitance, offers the lowest reduction in performance. Ripple Reduction The high switching frequency of 400kHz allows simple filtering. To reduce ripple, it is recommended that 0.47µF capacitors are used on VS and VOUT (see Figure 3). Dual outputs should both be decoupled to pin 5. In applications where power is supplied over long lines and output loading is high, or, there is significant inductance at the output, it may be necessary to use a 2.2µF capacitor on the input to insure startup. There is no restriction on the size of the output capacitor used to reduce ripple. The DCP0115 will start into any capacitive load. Low ESR capacitors will give the best reduction. +15V 1 C1 0.47µF 2 VS 0V EXTERNAL SYNCHRONIZATION DCP0115 5 6 7 R1 820Ω C2 0.47µF R2 1kΩ R3 820Ω R4 1kΩ The DCP0115 can be synchronized externally if required using a simple external interface. Figure 4 shows a universal interface using a 4066 quad switch. The CTL and SYNCON pins are used to select external synchronization or selfsynchronization. 0V +VOut –VOut C3 0.47µF This interface can also be used to stop (disable) the DCP0115. FIGURE 3. DCP011515 Fully Loaded. CTL SYNCON 1 — 0 1 0 1 FUNCTION External Sync Self-Sync Device Stop +15V 1 2 VCC +Out 1 6 C2 470nF –Out 1 (One Per DC/DC) DCP0115xxx 5 C1 470nF +5V 14 0V 0V 0V SYNC 7 +5V 0V 2 C5 470nF 0V 8 –VOUT VCC C6 470nF R1 33kΩ +VOUT +5V 1 +15V SYNC I/O1A U1 I/O1B CONT CTL 14 0V 0V FREQ IN DCP0105xxx 5 0V C3 470nF +Out 2 6 0V 2 8 VCC SYNC 14 0V 0V 5 C4 470nF +Out 3 6 7 0V +VOUT 8 FIGURE 4. Universal Interface. ® DCP0115 CONT I/O1A U4 I/O1B CONT I/O1A U5 I/O1B CONT 4066 DCP0105xxx 0V U3 I/O1B +VOUT 7 1 I/O1A 8 R2 33kΩ SYNC ON 0V R3 33kΩ Connecting the DCP0115 in Series 1. To predict the output voltage at 100% load take the measured or specified voltage at 75% load and multiply by (1 + Load Reg 75% to 100%). For example a DCP011512DP typical +VOUT at 100% load will be 12V x (1 – 7%) = 11.2V. Multiple DCP01 isolated 1W DC/DC converters can be connected in series to provide non-standard voltage rails. This is possible by utilizing the floating outputs provided by the DCP01’s galvanic isolation. For example, the output on dual output DCP01 versions can be connected in series to provide 2 times the magnitude of VOUT (see Figure 5). In this example, a dual 12V DCP011512D is connected to provide a 24V rail. 2. To predict the output voltage at 25% load take the measured or specified voltage at 75% load and multiply by (1 + Load Reg 25% to 75%). For example a DCP011512DP typical +VOUT at 25% load will be 12V x (1 + 5%) = 12.6V. To then estimate the voltage at 10% load take the previously calculated +VOUT at 25% load and multiply by (1 + Load Reg 10% to 25%). In this case the typical +VOUT at 10% load will be 12.6V x (1 + 10%) = 13.9V. Connecting the DCP0115 in Parallel If the output power from one DCP0115 is not sufficient, it is possible to parallel the outputs of multiple DCP0115s (see Figure 6). Again, the SYNC feature allows easy synchronization to prevent power-rail beat frequencies at no additional filtering cost. To obtain predictions for loads other than those specified assume the VOUT versus load characteristic is linear between the load points and calculate accordingly. The 10% to 100% load specification guarantees the maximum voltage excursion for any load between 10% to 100% with respect to VOUT at 75% load. PREDICTING OUTPUT VOLTAGE VERSUS LOAD The above does not take into consideration line regulation and assumes a nominal input voltage. The 1:1 line regulation of the DCP01 family means that a percentage change in the input will give a corresponding percentage change in the output. The Load Regulation specifications are calculated as follows: CONDITION CALCULATION 10% to 100% Load 10% to 25% Load 10% to 75% Load 75% to 100% Load (VOUT at 10% load – VOUT at 100% load)/ VOUT at 75% load (VOUT at 10% load – VOUT at 25% load)/ VOUT at 25% load (VOUT at 10% load – VOUT at 75% load)/ VOUT at 75% load (VOUT at 75% load – VOUT at 100% load)/ VOUT at 75% load VSUPPLY VS +VOUT +VOUT –VOUT –VOUT 24V DCP 01 0V 0V COM FIGURE 5. Connecting the DCP0115 in Series. VSUPPLY +VOUT VS SYNCIN DCP 01 0V 0V –VOUT VS +VOUT SYNCIN DCP 01 0V –VOUT 0V +VOUT 0V –VOUT COM FIGURE 6. Connecting Multiple DCP0115s in Parallel. ® 9 DCP0115 15.24 (0.600) SIP DC/DC DCP01xx 11.8 (0.464) +VIN –VIN 1.9 (0.075) 0V +VOUT –VOUT 2.54 (0.100) 1.2 (0.047) 14-Pin All Leads on 2.54mm Pitch Dimensions in mm (inches) FIGURE 8. PCB Pad Size and Placement for “U” Package. FIGURE 7. PCB Layout for DCP0115 and Competitive SIP DC/DC. ® DCP0115 10