722BG

722 SBVS016A - SEPTEMBER 1978 – REVISED JANUARY 2003 DUAL ISOLATED DC/DC CONVERTER DESCRIPTION The 722 converts a single 5VDC to 16VDC input into a pair of bipolar output voltages of the same value as the input voltage. The converter is capable of providing a total output current of 64mA at rated voltage accuracy and up to 200mA without damage. The two output channels are isolated from the input and from each other. They may be connected independently, in series for higher output voltage or in parallel for higher output current, as a single channel isolated DC/DC converter. Integrated circuit construction of the 722 reduces size and cost. High isolation breakdown voltages and low leakage currents are assured by special design and construction that includes use of a high dielectric strength, low leakage coating used on the internal assembly. A self-contained 900kHz oscillator drives switching circuitry, which is designed to eliminate the common problem of input current spiking due to transformer saturation or crossover switching. FEATURES q DUAL ISOLATED ±5V TO ±16V OUTPUTS q HIGH BREAKDOWN VOLTAGE: 8000V Test q LOW LEAKAGE CURRENT: < 1µA at 240V/60Hz q LOW COST PER ISOLATED CHANNEL q SMALL SIZE: 27.9mm x 27.9mm x 7.6mm (1.1" x 1.1" x 0.3") APPLICATIONS q MEDICAL EQUIPMENT q INDUSTRIAL PROCESS CONTROL q TEST EQUIPMENT q DATA ACQUISITION SYSTEMS q NUCLEAR INSTRUMENTATION P+ 11 V+ 20 Rectifiers and Filters 1 2 3 +VO1 C1 –VO1 E 18 Oscillator and Switch Drivers Rectifiers and Filters 10 +VO2 9 8 C2 –VO2 V– 16 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2003, Texas Instruments Incorporated www.ti.com PACKAGE/ORDERING INFORMATION PACKAGE DESIGNATOR(1) JND JND JND SPECIFIED TEMPERATURE RANGE(2) –25°C to +85°C –25°C to +85°C –25°C to +85°C PACKAGE MARKING 722 722BG 722MG ORDERING NUMBER 722G 722BG 722MG TRANSPORT MEDIA, QUANTITY Rails, 17 Rails, 17 Rails, 17 PRODUCT 722 722BG 722MG PACKAGE-LEAD DIP-20 DIP-20 DIP-20 NOTES: (1) For the most current specifications, and package information, refer to our web site at www.ti.com. (2) –25°C to +60°C for 16mA ≤ ILOAD ≤ 40mA per output. ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage, V+ to V– ..................................................................... 16V Input Current ................................................................................... 275mA Operating Temperature .................................................... –25°C to +80°C Storage Temperature ...................................................... –55°C to +125°C Junction Temperature ..................................................... –55°C to +125°C NOTE: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied. ELECTROSTATIC DISCHARGE SENSITIVITY 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. 2 722 www.ti.com SBVS016A ELECTRICAL CHARACTERISTICS At TA = +25°C, VIN = 15VDC, C = 0.47µF, and R1 selected per typical characteristic, unless otherwise noted. 722 PARAMETER INPUT Rated Input Voltage Input Voltage Range(1) Input Current CONDITIONS MIN TYP 15 5 Total Output Current = 12mA Total Output Current = 64mA Total Output Current = 64mA at TA = +85°C Total Output Current = 160mA Total Output Current = 12mA Total Output Current = 64mA Total Output Current = 160mA Input-to-Output, 5 seconds, min Input-to-Output, 1 minute, min Channel-to-Channel, 5 seconds, min Input-to-Output, continuous Channel-to-Channel, continuous Input-to-Output Input-to-Output, 240V, 60Hz ILOAD = 3mA per Output ILOAD = 16mA per Output ILOAD = 40mA per Output Total of All Outputs Any One Output(5) ILOAD = 3mA per Output ILOAD = 16mA per Output ILOAD = 40mA per Output Balanced Loads 15.4 14.3 — 3 (5) 722BG MAX MIN TYP ✽ 16 ✽ ✽ ✽ ✽ 225 ✽ ✽ 12 ✽ ✽ ✽ MAX MIN 722MG TYP ✽ ✽ ✽ ✽ ✽ — ✽ ✽ — ✽ MAX UNITS VDC VDC mA mA mA mA mA, pk mA, pk mA, pk Vpk Vrms Vpk V V GΩ || pF µA VDC VDC VDC mA mA mVpk mVpk mVpk mVDC 50 105 120 — 3 6 — 120 — 275 — Input Ripple(2) ISOLATION Test Voltages Rated Voltages Isolation Impedance Leakage Current(3) OUTPUT Rated Output Voltages(4) 8000 — 5000 3500 2000 10 || 6 1 16.2 16.2 — 200 100 ✽ ✽ ✽ — ✽ ✽ ✽ ✽ ✽ ✽ 2500 ✽ ✽ ✽ ✽ ✽ ✽ — ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ — ✽ ✽ — ✽ ✽ 13.0 ✽ 14.2 Output Current Load Regulation Ripple Voltage ✽ ✽ 16.2 ✽ ✽ — Tracking Error between Dual Outputs Sensitivity to Input Voltage Changes Output Voltage Temperature Coefficient TEMPERATURE Specification Storage Junction Temperature ✽ Specifications same as 722. 15 35 — ±200 100 ✽ ✽ ✽ 50 ✽ ✽ ✽ TA = TSPECIFICATION RANGE 1.13 ±0.02 ✽ ✽ ✽ ✽ V/V %/°C ILOAD ≤ 16mA per Output ILOAD ≤ 40mA per Output –25 –25 –55 +85 +60 +125 +125 ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ °C °C °C °C NOTES: (1) For ambient temperature above +70°C, the input voltage is 12.5V (max). The input voltage remains 16V (max) if case temperature is kept below +85°C. (2) External capacitor across P+ to V– pins and 12" of #24 wire to VIN. (3) Reference UL544, paragraph 27.5, Leakage Current. (4) See Typical Characteristics. (5) A minimum output current of 3mA at each output is recommended to maintain output voltage accuracy. 722 SBVS016A www.ti.com 3 TYPICAL CHARACTERISTICS At TA = +25°C, VIN = 15VDC, C = 0.47µF, and R1 selected per typical characteristic, unless otherwise noted. SELECTION OF R1 OR EXTERNAL VOLTAGE V+ FOR MINIMUM INTERNAL POWER DISSIPATION Maximum Ambient Temperature °C MAXIMUM SAFE OPERATING TEMPERATURE vs TOTAL OUTPUT CURRENT 125 Case 100 100 125 Maximum Case Temperature(1) (°C) Input Voltage (V) >13 11 to 13 9 to 11 8 to 9