TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 D D D D D TLV431 Precision Programmable Reference (1.24 V) and an Optocoupler in a Single Package 1% Voltage-Reference Tolerance Controlled Optocoupler CTRs: TPS5908, TPS5910 100% to 400% TPS5908A, TPS5910A 150% to 300% High Withstand Voltage (WTV), 7500 V Peak for 1 Minute Safety Regulatory Approvals – UL . . . File Number E65085 – FIMKO, SEMKO, NEMKO, DEMKO – EN60065/IEC 65 – EN60950/IEC 950 – VDE 0884, Level 4 (6000-V Insulation) DCS OR P PACKAGE (TOP VIEW) LED COMP GND FB 1 8 2 7 3 6 4 5 NC/BASE† C E NC NC – No internal connection †BASE – TPS5910, TPS5910A only description These optoisolated feedback amplifiers consist of the industry standard TLV431 precision programmable reference with a 1% reference voltage tolerance, and an optocoupler. The devices are primarily intended for use as the error-amplifier/reference/isolation-amplifier element in isolated ac-to-dc power supplies and dc-to-dc converters. The optocoupler is a gallium-arsenide (GaAs) light-emitting diode that emits at a wavelength of 940 nm, combined with a silicon phototransistor. The current transfer ratio (CTR) ranges from 100% to 400% in the standard version. The TPS5908A and TPS5910A versions with 150%-to-300% CTR are available for higher-performance applications. All versions enable power-supply designers to reduce component count and save space in tightly packaged designs. The tight-tolerance reference eliminates the need for adjustments in many applications. These devices are characterized for operation from – 40°C to 100°C. Each amplifier is supplied in an 8-pin DIP or in an 8-pin gull-wing surface-mount package (DCS). typical application + + VI VO PWM Control 7 TPS5908 TPS5908A TPS5910 TPS5910A 1 2 4 6 3 TPS5908, TPS5910: CTR Range, 100% to 400% TPS5908A, TPS5910A: CTR Range, 150% to 300% R1 R2 8 (TPS5910, TPS5910A Only) 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. Copyright 1998, Texas Instruments Incorporated 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 schematic LED COMP FB GND 7 1 C 2 6 4 E 3 Terminal Functions TERMINAL NAME NO. C 7 COMP 2 E 6 FB 4 GND 3 LED NC 1 5, 8 I/O DESCRIPTION Phototransistor collector O Light-emitting diode and TLV431 cathodes Phototransistor emitter I Feedback Ground I Light-emitting diode anode No connection absolute maximum ratings at 25°C free-air temperature (unless otherwise noted)† Input power dissipation at (or below) TA = 25°C (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mW Input LED current, II(LED) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA Input LED voltage, VI(LED) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 V Input diode reverse voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V Output power dissipation at (or below) TA = 25°C (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 mW Output collector-to-emitter voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Output emitter-to-collector voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Output collector current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA Total continuous power dissipation at (or below) TA = 25°C (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . 350 mW Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 100°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 150°C Total input-to-output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 kV peak or dc (5.3 kVrms) Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Flammability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (see Note 4) † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. Derate linearly from 25°C at a rate of 2.95 mW/°C. 2. Derate linearly from 25°C at a rate of 1.76 mW/°C. 3. Derate linearly from 25°C at a rate of 4.12 mW/°C. 4. Optocoupler total-package flame retardancy is tested to IEC695-2-2 using a flame application time of 30 seconds. Outer mold compound is verified to meet UL 94 V-0. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 electrical characteristics, TA = 25°C (unless otherwise noted) input PARAMETER TEST CONDITIONS VF Light-emitting diode forward voltage IR Light-emitting diode reverse current MIN VO(COMP) = VI(FB), See Figure 1 II(LED) = 10 mA, VR = 6 V VO(COMP) = VI(FB), See Figure 1 II(LED) = 10 mA, 1.228 TYP MAX 1.2 1.4 V 10 µA 1.252 V 1.24 UNIT Vref Reference voltage Vref(dev) Deviation of reference voltage over temperature VO(COMP) = VI(FB), TA = 25°C to 100°C, II(LED) = 10 mA, See Figure 1 ∆Vref ∆VI(LED) Ratio of reference voltage change-to-change in input light-emitting-diode voltage ∆VI(LED) = 3 V to 7 V, See Figure 2 II(LED) = 10 mA, II(FB) Feedback input current II(LED) = 10 mA, See Figure 3 R3 = 10 kΩ , Iref(dev) Deviation of reference input current over temperature II(LED) = 10 mA, TA = 25°C to 100°C, R3 = 10 kΩ, See Figure 3 0.05 IDRV(min) Minimum drive current 55 80 µA II(off) VO(COMP) = VI(FB), VI(LED) = 7 V, See Figure 4 See Figure 1 Off-state input light-emitting-diode current 0.001 0.1 µA |Zka|† Regulator output impedance VO(COMP) = VI(FB), IO(COMP) = 1 mA to 50 mA f ≤ 1 kHz, 4 VI(FB) = 0, mV –1.5 – 2.7 0.15 0.5 mV/ V µA µA Ω 0.25 † This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology. output PARAMETER ICEO V(BR)ECO TEST CONDITIONS Collect dark current VCE = 35 V, IE = 100 µA See Figure 5 Breakdown voltage, emitter-to-collector, base open V(BR)CBO Breakdown voltage, collector-to-base, emitter open IC = 10 µA, See Figure 7 IF = 0, hFE Static forward current transfer ratio, common collector VCE = 5 V, See Figure 8 V(BR)EBO Breakdown voltage, emitter-to-base, collector open IC = 10 mA, IF = 0, IE = 10 µA, See Figure 9 TPS5910, TPS5910A IF = 0, MIN TYP MAX UNIT 100 nA 7 V 70 V 200 7 V coupler PARAMETER CTR VCE(sat) Current transfer ratio Collector-emitter saturation voltage TEST CONDITIONS TPS5908, TPS5910 TPS5908A, TPS5910A VO(COMP) = VI(FB), VCE = 5 V, II(LED) = 5 mA,, See Figure 6 VO(COMP) = VI(FB), IC = 1 mA, II(LED) = 10 mA, See Figure 6 Viso† Isolation voltage IIO = 10 µA, f = 60 Hz Cio Input to output capacitance VIO = 0, f = 1 kHz † This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MIN TYP MAX 100% 400% 150% 300% 0.1 7500 0.2 UNIT V V 0.6 pF 3 TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 PARAMETER MEASUREMENT INFORMATION II(LED) A II(LED) 7 1 7 1 + V – VF R1 2 6 4 V VO(COMP) + V V Vref R2 – 2 VI(LED) 6 4 Vref 3 3 Figure 2. ∆Vref /∆VI(LED) Test Circuit Figure 1. Vref, VF , Imin Test Circuit II(off) II(LED) 7 1 7 1 A II(FB) A 2 V 2 VI(LED) 6 4 6 4 V R3 Vref 3 3 Figure 3. II(FB) Test Circuit Figure 4. II(off) Test Circuit ICEO ICEO 1 7 1 A A 2 6 4 V VO(COMP) 6 3 Figure 5. ICEO Test Circuit POST OFFICE BOX 655303 Figure 6. CTR, VCE(sat) Test Circuit • DALLAS, TEXAS 75265 + V – Vref 3 4 7 VCE VCE 2 4 II(LED) TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 PARAMETER MEASUREMENT INFORMATION IB 1 8 V 2 1 8 2 7 A VCE – VBE IC 7 IC hFE = IB 4 4 6 6 3 3 IC, IB Figure 8. hFE Test Circuit Figure 7. V(BR)CBO Test Circuit 1 2 8 7 4 V IE 6 3 Figure 9. V(BR)EBO Test Circuit POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 TYPICAL CHARACTERISTICS 250 VO(COMP) = VI(FB) TA = 25°C 200 150 100 50 0 0 INPUT LIGHT-EMITTING-DIODE CURRENT vs REFERENCE VOLTAGE II(LED) – Input Light-Emitting-Diode Current – mA II(LED) – Input Light-Emitting-Diode Current – µA INPUT LIGHT-EMITTING-DIODE CURRENT vs REFERENCE VOLTAGE 0.5 1 15 VO(COMP) = VI(FB) TA = 25°C 10 5 0 0 1.5 0.5 Figure 11 Figure 10 RATIO OF DELTA REFERENCE VOLTAGE TO DELTA LED VOLTAGE vs FREE-AIR TEMPERATURE REFERENCE VOLTAGE vs FREE-AIR TEMPERATURE Vref / VI(LED) – Ratio of Delta Reference Voltage to Delta LED Voltage – V 1.250 VO(COMP) = VI(FB) II(LED) = 10 mA Vref – Reference Voltage – V 1.248 1.246 1.244 1.242 1.240 – 50 –25 0 25 50 75 100 0 VI(LED) = 3 V to 7 V II(LED) = 10 mA – 0.1 – 0.2 – 0.3 – 0.4 – 0.5 – 50 TA – Free-Air Temperature – °C – 25 0 25 Figure 13 POST OFFICE BOX 655303 50 TA – Free-Air Temperature – °C Figure 12 6 1.5 Vref – Reference Voltage – V Vref – Reference Voltage – V 1.238 –72 1 • DALLAS, TEXAS 75265 75 100 TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 TYPICAL CHARACTERISTICS OFF-STATE INPUT LIGHT-EMITTING-DIODE CURRENT vs FREE-AIR TEMPERATURE FEEDBACK INPUT CURRENT vs FREE-AIR TEMPERATURE 40 250 VI(LED) = 7 V 200 150 100 0 – 50 – 25 0 25 50 75 30 Current – nA I I(off) – Off-State Input Light-Emitting-Diode I I(FB) – Feeback Input Current – nA II(LED) = 10 mA R3 = 10 kΩ 100 20 10 0 – 50 – 25 0 25 100 Figure 15 Figure 14 NORMALIZED CURRENT TRANSFER RATIO RELATIVE TO VALUE AT TA = 25°C vs FREE-AIR TEMPERATURE COLLECTOR DARK CURRENT vs FREE-AIR TEMPERATURE 1.2 10000 VCE = 5 V VO(COMP) = VI(FB) IA = 5 mA CTR – Normalized Current Transfer Ratio Relative to Value at TA = 25 °C VCE = 35 V I CEO – Collector Dark Current – nA 75 TA – Free-Air Temperature – °C TA – Free-Air Temperature – °C 1000 100 10 1 0.1 – 50 50 – 25 0 25 50 75 100 1 0.8 0.6 0.4 0.2 0 – 50 TA – Free-Air Temperature – °C – 25 0 25 50 75 100 TA – Free-Air Temperature – °C Figure 16 Figure 17 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 TYPICAL CHARACTERISTICS CURRENT TRANSFER RATIO vs INPUT LIGHT-EMITTING-DIODE CURRENT COLLECTOR-TO-EMITTER SATURATION VOLTAGE vs FREE-AIR TEMPERATURE VCE(sat) – Collector-to-Emitter Saturation Voltage – V 300 CTR – Current Transfer Ratio – % VCE = 5 V 250 200 150 100 50 0 1 2 5 10 20 30 3 50 II(LED) – Input Light-Emitting-Diode Current – mA 0.20 II(LED) = 10 mA IC = 1 mA 0.18 0.16 0.14 0.12 0.10 0.08 – 50 – 25 0 Figure 19 I I(LED) – Input Light-Emitting-Diode Forward Current – mA Figure 18 INPUT LIGHT-EMITTING-DIODE FORWARD CURRENT vs LIGHT-EMITTING-DIODE FORWARD VOLTAGE 60 50 40 TA = 75°C 30 TA = 25°C 20 TA = – 25°C 10 0 0.8 0.9 1 1.1 1.2 1.3 1.4 VF – Light-Emitting-Diode Forward Voltage – V Figure 20 8 25 POST OFFICE BOX 655303 50 TA – Free-Air Temperature – °C • DALLAS, TEXAS 75265 75 100 TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 MECHANICAL DATA DCS (R-PDSO-G8) PLASTIC DUAL SMALL-OUTLINE OPTO COUPLER 0.023 (0,58) 0.013 (0,33) 0.092 (2,34) TYP 0.055 (1,40) 0.045 (1,14) 0.045 (1,14) 0.035 (0,89) 8 5 0.405 (10,29) 0.385 (9,78) 0.008 (0,20) NOM 0.260 (6,60) 0.240 (6,10) 1 Gage Plane 4 0.055 (1,40) 0.035 (0,89) 0.100 (2,54) 0.390 (9,91) 0.370 (9,40) 0°– 5° 0.010 (0,25) 0.030 (0,76) MIN 0.150 (3,81) MAX Seating Plane 0.020 (0,51) MAX 0.004 (0,10) 4073327/B 01/98 NOTES: A. All linear dimensions are in inches(millimeters). B. This drawing is subject to change without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK AMPLIFIERS SOES030B – MAY 1997 – REVISED JANUARY 1998 MECHANICAL DATA P (R-PDIP-T8) PLASTIC DUAL-IN-LINE PACKAGE 0.400 (10,60) 0.355 (9,02) 8 5 0.260 (6,60) 0.240 (6,10) 1 4 0.070 (1,78) MAX 0.310 (7,87) 0.290 (7,37) 0.020 (0,51) MIN 0.200 (5,08) MAX Seating Plane 0.125 (3,18) MIN 0.100 (2,54) 0.021 (0,53) 0.015 (0,38) 0°– 15° 0.010 (0,25) M 0.010 (0,25) NOM 4040082 / B 03/95 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Falls within JEDEC MS-001 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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 acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor 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. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. 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 semiconductor 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, warranty or endorsement thereof. Copyright 1998, Texas Instruments Incorporated