® DCV01 Series DCV 01 DCV 01 For most current data sheet and other product information, visit www.burr-brown.com Miniature, 1W, 1500Vrms Isolated UNREGULATED DC/DC CONVERTERS FEATURES APPLICATIONS ● UP TO 85% EFFICIENCY ● INDUSTRIAL CONTROL AND INSTRUMENTATION ● THERMAL PROTECTION ● DEVICE-TO-DEVICE SYNCHRONIZATION ● POINT-OF-USE POWER CONVERSION ● GROUND LOOP ELIMINATION ● SHORT CIRCUIT PROTECTION ● EN55022 CLASS B EMC PERFORMANCE ● UL1950 RECOGNIZED COMPONENT ● JEDEC PDIP-14 AND GULL-WING PACKAGES ● DATA ACQUISITION ● TEST EQUIPMENT ● SECONDARY ISOLATION CIRCUITS DESCRIPTION The DCV01 series is a family of 1W, 1500Vrms isolated, unregulated, isolated DC/DC converters. Requiring a minimum of external components and including on-chip device protection, the DCV01 series provides extra features such as output disable and synchronization of switching frequencies. The use of a highly integrated package design results in highly reliable products with a power density of 40W/in3 (2.4W/cm3). This combination of features high isolation and small size makes the DCV01 suitable for a wide range of applications. SYNCOUT 800kHz Oscillator SYNCIN ÷2 Reset VOUT Power Stage 0V Watch-dog/ start-up PSU Thermal Shutdown 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/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 ® © 2000 Burr-Brown Corporation PDS-1592A 1 DCV01 Printed in U.S.A. April, 2000 SPECIFICATIONS At TA = +25°C, unless otherwise specified. DCV01 SERIES PARAMETER CONDITIONS OUTPUT Power Ripple Voltage vs Temp MIN 100% Full Load O/P Capacitor = 1µF, 50% Load Room to Cold Room to Hot TYP 0.97 20 0.046 0.016 INPUT Voltage Range on VS –10 ISOLATION Voltage 1s Flash Test 60s Test, UL1950(1) 1.5 1.5 Switching Frequency = fOSC /2 External 3 kHz V µA µs pF TA = +55°C 75 FITS 75 2 °C mA 150 3 TEMPERATURE RANGE Operating +85 °C EFFICIENCY (%) BARRIER CAPACITANCE (pF) LEAKAGE CURRENT (µA) –40 INPUT VOLTAGE (V) OUTPUT VOLTAGE (V) VS LOAD REGULATION (%) NO LOAD CURRENT (mA) 10% TO 100% LOAD(3) 0% LOAD 100% LOAD VISO = 750Vrms VISO = 750Vrms TYP TYP TYP TYP VNOM IQ 75% LOAD(2) TYP 0.4 VSYNC = +2V THERMAL SHUTDOWN IC Temperature at Shutdown Shutdown Current MIN %/1% of VS 800 0 RELIABILITY Demonstrated MAX MIN TYP MAX % kVrms kVrms 1 SWITCHING/SYNCHRONIZATION Oscillator Frequency (fOSC) Sync Input Low Sync Input Current Disable Time Capacitance Loading on SYNCIN Pin UNITS W mVp-p %/°C %/°C 10 LINE Regulation PRODUCT MAX TYP MAX CISO DCV010505 4.5 5 5.5 4.75 5 5.25 19 31 20 80 3.6 0.9 DCV010505D 4.5 5 5.5 ±4.75 ±5 ±5.25 19 32 23 80 3.8 0.9 DCV010512 4.5 5 5.5 11.4 12 12.6 23 38 30 85 5.1 1.2 DCV010512D 4.5 5 5.5 ±11.4 ±12 ±12.6 19 37 40 82 4.0 1.0 DCV010515 4.5 5 5.5 14.25 15 15.75 30 50 34 84 3.8 0.9 DCV010515D 4.5 5 5.5 ±14.25 ±15 ±15.75 27 50 42 85 4.7 1.1 DCV011512D(4) 13.5 15 16.5 ±11.4 ±12 ±12.6 11 39 19 78 4.2 1.0 DCV011515D(4) 13.5 15 16.5 ±14.25 ±15 ±15.75 12 39 20 79 4.2 1.0 DCV012405(4) 21.6 24 26.4 4.75 5 5.25 13 23 14 77 3.8 0.9 DCV012415D(4) 21.6 24 26.4 ±14.25 ±15 ±15.75 12 35 17 76 5.3 1.3 NOTES: (1) During UL1950 recognition tests only, UL File #E199929. (2) 100% Load Current = 1W/VNOM TYP. (3) Load regulation = (VOUT at 10% – VOUT at 100%)/ VOUT at 75%. (4) Scheduled availability Q3 2000. 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. ® DCV01 2 ABSOLUTE MAXIMUM RATINGS ELECTROSTATIC DISCHARGE SENSITIVITY Input Voltage: 5V Input Models .................................................................................. 7V 15V Input Models .............................................................................. 18V 24V Input Models .............................................................................. 29V Storage Temperature ...................................................... –60°C to +125°C Lead Temperature (soldering, 10s) ................................................. 270°C 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. ORDERING INFORMATION DCV01 05 05 (D ) ( 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. ) Basic Model Number: 1W Product Voltage Input: 5V In Voltage Output: 5V Out Dual Output: Package Code: P = PDIP-14 P-U = PDIP-14 Gull-Wing PACKAGE/ORDERING INFORMATION PACKAGE PACKAGE DRAWING NUMBER Single DCV010505P DCV010505P-U DCV010512P DCV010512P-U DCV010515P DCV010515P-U DCV012405P(2) DCV012405P-U(2) DIP-14 Gull-Wing-14 DIP-14 Gull-Wing-14 DIP-14 Gull-Wing-14 DIP-14 Gull-Wing-14 010-1 010-2 010-1 010-2 010-1 010-2 010-1 010-2 –40°C –40°C –40°C –40°C –40°C –40°C –40°C –40°C to to to to to to to to Dual DCV010505DP DCV010505DP-U DCV010512DP DCV010512DP-U DCV010515DP DCV010515DP-U DCV011512DP(2) DCV011512DP-U(2) DCV011515DP(2) DCV011515DP-U(2) DCV012415DP(2) DCV012415DP-U(2) DIP-14 Gull-Wing-14 DIP-14 Gull-Wing-14 DIP-14 Gull-Wing-14 DIP-14 DIP-14 Gull-Wing-14 DIP-14 Gull-Wing-14 DIP-14 010-1 010-2 010-1 010-2 010-1 010-2 010-1 010-2 010-1 010-2 010-1 010-2 –40°C –40°C –40°C –40°C –40°C –40°C –40°C –40°C –40°C –40°C –40°C –40°C to to to to to to to to to to to to PRODUCT SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ORDERING NUMBER(1) TRANSPORT MEDIA +85°C +85°C +85°C +85°C +85°C +85°C +85°C +85°C DCV010505P DCV010505P-U DCV010512P DCV010512P-U DCV010515P DCV010515P-U DCV012405P DCV012405P-U DCV010505P DCV010505P-U/700 DCV010512P DCV010512P-U/700 DCV010515P DCV010515P-U/700 DCV012405P DCV012405P-U/700 Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Tape and Reel Rails +85°C +85°C +85°C +85°C +85°C +85°C +85°C +85°C +85°C +85°C +85°C +85°C DCV010505DP DCV010505DP-U DCV010512DP DCV010512DP-U DCV010515DP DCV010515DP-U DCV011512DP DCV011512DP-U DCV011515DP DCV011515DP-U DCV012415DP DCV012415DP-U DCV010505DP DCV010505DP-U/700 DCV010512DP DCV010512DP-U/700 DCV010515DP DCV010515DP-U/700 DCV011512DP DCV011512DP-U/700 DCV011515DP DCV011515DP-U/700 DCV012415DP DCV012415DP-U/700 Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel NOTE: (1) 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 “DCP010505BP-U/700” will get a single 700-piece Tape and Reel. (2) Scheduled availability Q3, 2000. ® 3 DCV01 PIN CONFIGURATION (Single-DIP and Gull-Wing) Top View PIN CONFIGURATION (Dual-DIP and Gull-Wing) DIP VS 1 0V 2 Top View 14 SYNCIN DIP VS 1 0V 2 DCV01D DCV01 0V 5 0V 5 +VOUT 6 +VOUT 6 NC 7 –VOUT 7 8 SYNCOUT PIN DEFINITION (Single-DIP) PIN # 1 2 5 6 7 8 14 PIN NAME VS 0V 0V +VOUT NC SYNCOUT SYNCIN 8 SYNCOUT PIN DEFINITION (Dual-DIP) DESCRIPTION PIN # Voltage Input Input Side Common Output Side Common +Voltage Out Not Connected Unrectified Transformer Output Synchronization Pin 1 2 5 6 7 8 14 ® DCV01 14 SYNCIN 4 PIN NAME VS 0V 0V +VOUT –VOUT SYNCOUT SYNCIN DESCRIPTION Voltage Input Input Side Common Output Side Common +Voltage Out –Voltage Out Unrectified Transformer Output Synchronization Pin TYPICAL PERFORMANCE CURVES At TA = +25°C, unless otherwise noted. DCV010505 OUTPUT RIPPLE vs LOAD (20MHz BW) DCV010512D VOUT vs LOAD 14.5 50 1µF Ceramic 4.7µF Ceramic 10µF Ceramic 45 14.0 13.5 35 13.0 30 VOUT (V) Ripple (mVp-p) 40 25 20 12.5 12.0 11.5 15 10 11.0 5 10.5 +VOUT –VOUT 10.00 0 10 20 30 40 50 60 70 80 90 10 100 20 30 40 50 60 70 80 90 100 80 90 100 Load (%) Load (%) DCV010512D EFFICIENCY vs LOAD DCV010515D VOUT vs LOAD 85 18 80 17 VOUT (V) Efficiency (%) 75 70 65 60 16 15 +VOUT –VOUT 55 50 14 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 Load (%) DCV010515D EFFICIENCY vs LOAD 70 DCV012405 VOUT vs LOAD 90 5.60 85 5.50 80 5.40 75 5.30 VOUT (V) Efficiency (%) 60 Load (%) 70 65 5.20 5.10 60 5.00 55 4.90 50 4.80 10 20 30 40 50 60 70 80 90 100 10 Load (%) 20 30 40 50 60 70 80 100 Load (%) ® 5 DCV01 TYPICAL PERFORMANCE CURVES (Cont.) At TA = +25°C, unless otherwise noted. DCV010505 CONDUCTED EMISSIONS (125% Load) DCV012405 EFFICIENCY vs LOAD 60 80 50 Emission Level, Peak (dBµA) 90 60 50 40 30 20 10 10 20 30 40 50 60 70 80 90 40 30 20 10 0 –10 –20 0.15 0 100 1 Load (%) Frequency (MHz) DCV010505 CONDUCTED EMISSIONS (8% Load) 60 Emission Level, Peak (dBµA) Efficiency (%) 70 50 40 30 20 10 0 –10 –20 0.15 1 10 Frequency (MHz) ® DCV01 6 30 10 30 switching frequency, or even stopping the oscillator circuit. 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 SYNCIN pins are driven by an external device. Details are contained in a separate applications bulletin (AB-153). FUNCTIONAL DESCRIPTION OVERVIEW The DCV01 offers up to 1W of unregulated output power with a typical efficiency of up to 85%. 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. Separate primary and secondary transformer windings give good isolation and low barrier capacitance. POWER STAGE This uses a push-pull, center-tapped topology switching at 400kHz (divide by 2 from 800kHz oscillator). CONSTRUCTION The DCV01’s basic construction is the same as standard ICs. There is no substrate within the molded package. The DCV01 is constructed using an IC, rectifier diodes, and a wound magnetic toroid on a leadframe. As there is no solder within the package, the DCV01 does not require any special PCB assembly processing. This results in an isolated DC/DC converter with inherently high reliability. OSCILLATOR AND WATCHDOG The onboard 800kHz oscillator generates the switching frequency via a divide by 2 circuit. The oscillator can be synchronized to other DCV01 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 SYNCIN pin LOW. The output pins will be tri-stated. This will occur in 2µs. ADDITIONAL FUNCTIONS DISABLE/ENABLE The DCV01 can be disabled or enabled by driving the SYNC pin using an open drain CMOS gate. If the SYNCIN pin is pulled low, the DCV01 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 DCV01 to be enabled. Capacitive loading on the SYNCIN pin should be minimized in order to prevent a reduction in the oscillator frequency. THERMAL SHUTDOWN The DCV01 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. SYNCHRONIZATION 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 small variations in switching frequencies between the DC/DC converters. The DCV01 overcomes this by allowing devices to be synchronized to one another. Up to eight devices can be synchronized by connecting the SYNCIN pins together, taking care to minimize the capacitance of tracking. Stray capacitance (> 3pF) will have the effect of reducing the VSUPPLY DECOUPLING Ripple Reduction The high switching frequency of 400kHz allows simple filtering. To reduce ripple, it is recommended that at least a 1µF capacitor is used on VOUT. Dual outputs should both be decoupled to pin 5. A 2.2µF low ESR capacitor on the input of the 5V in versions, and a 0.47µF low ESR cap on the 24V DCV01 in versions is recommended. VOUT 1 VS SYNCIN DCV 01 0V 0V VS VOUT 2 VOUT1 + VOUT 2 SYNCIN DCV 0V 01 0V COM FIGURE 1. Connecting the DCV01 in Series. ® 7 DCV01 The DCV01 is a switching power supply and as such can place high peak current demands on the input supply. In order to avoid the supply falling momentarily during the fast switching pulses ground and power planes should be used to track the power to the input of DCV01. If this is not possible then the supplies must be connected in a star formation with the tracks made as wide as possible. If the SYNCIN pin is being used then the tracking between device SYNCIN pins should be short to avoid stray capacitance. If the SYNCIN pin is not being used it is advisable to place a guard ring, (connected to input ground) around this pin to avoid any noise pick up. The output should be taken from the device using ground and power planes, this will ensure minimum losses. A good quality low ESR capacitor placed as close as practicable across the input will reduce reflected ripple and ensure a smooth start up. A good quality low ESR capacitor placed as close as practicable across the rectifier output terminal and output ground will give the best ripple and noise performance. Connecting the DCV01 in Series Multiple DCV01 isolated 1W DC/DC converters can be connected in series to provide nonstandard voltage rails. This is possible by utilizing the floating outputs provided by the DCV01’s galvanic isolation. Connect the positive VOUT from one DCV01 to the negative VOUT (0V) of another (see Figure 1). If the SYNCIN pins are tied together, the self-synchronization feature of the DCV01 will prevent beat frequencies on the voltage rails. The SYNCIN feature of the DCV01 allows easy series connection without external filtering, minimizing cost. The outputs on dual output DCV01 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 DCV01 could be connected to provide a 30V rail. Connecting the DCV01 in Parallel If the output power from one DCV01 is not sufficient, it is possible to parallel the outputs of multiple DCV01s, as shown in Figure 3. Again, the SYNCIN feature allows easy synchronization to prevent power-rail beat frequencies at no additional filtering cost. THERMAL MANAGEMENT Due to the high power density of this device it is advisable to provide ground planes on the input and output. PCB LAYOUT Ripple and Noise Careful consideration should be given to the layout of the PCB in order that the best results can be obtained. VSUPPLY VS DCV 01 0V +VOUT +VOUT –VOUT –VOUT 0V COM FIGURE 2. Connecting Dual Outputs in Series. VSUPPLY VOUT VS SYNCIN DCV 01 0V 0V VS VOUT 2 x Power Out SYNCIN DCV 01 0V 0V COM FIGURE 3. Connecting Multiple DCV01s in Parallel. ® DCV01 8