TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 D D D D D D D D D NFC or NFD PACKAGE (TOP VIEW) TL1431, Optocoupler, and Advanced Current-Mode-PWM in a 16-Pin DIP LinBiCMOS Current-Mode-PWM Operates at Frequencies up to 1 MHz 100-µA Maximum Start-up Current 2-A, 30-ns MOSFET Drive Output TL1431 Voltage Reference/Feedback Amplifier 7500-V Peak Withstand Voltage Available With Gull Wing VDE Lead Forms – 40°C to 100°C Free-Air Operating Temperature Range Safety Regulatory Approvals Pending – UL . . . File Number E65085 – FIMKO, SEMKO, NEMKO, DEMKO – EN60065/IEC 65 – EN60950/IEC 950 – VDE 0884, Level 4 (6000-V Insulation) FB INPUT_GND COMP BIAS 1 16 2 15 3 14 4 13 12 11 NC NC 7 10 8 9 IS VC RT/CT PWM_GND REF VCC REG OUT description The TIL5942 and TIL5942A consist of an advanced current-mode-PWM controller and a TL1431 adjustable precision shunt regulator, incorporated in a single package. The controller provides a photodetector, an improved MOSFET drive output, and an LED for isolation. The TL1431 is configured as a precision reference/error amplifier. Using the TIL5942 or the TIL5942A, the power-supply designer can implement the controller for an isolated dc/dc converter or off-line switching power supply, with one IC and a few passive components. The TIL5942 standard version has a reference voltage tolerance of 0.8% and the TIL5942A has a reference voltage tolerance of 0.4% These controllers are available in a 16-pin PDIP with a lead form for through-hole, or gull-wing lead form for surface-mount applications. These devices operate over a – 40°C to 100°C junction temperature range. End equipment applications for the TIL5942 and the TIL5942A include isolated ac-to-dc power supplies and dc/dc converters. AVAILABLE OPTIONS PACKAGED DEVICES TA PLASTIC DUAL-IN-LINE WITH VDE LEAD FORM, THROUGH-HOLE PLASTIC DUAL-IN-LINE WITH VDE LEAD FORM, SURFACE-MOUNT LEADS – 40°C to 100°C TIL5942NFC, TIL5942ANFC TIL5942NFD, TIL5942ANFD 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. LinBiCMOS is a trademark of Texas Instruments Incorporated. Copyright 1997, 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 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 functional block diagram VCC PWM_GND REF RT/CT 11 Voltage Reference 13 Voltage Regulator 10 REG 12 Driver 14 Oscillator D Q 9 OUT Primary Secondary BIAS I(VC) CLK R IIB(IS) 4 LED COMP FB INPUT_GND 3 1 TL1431X 2 1V 16 15 IS VC Terminal Functions TERMINAL NAME NO. I/O DESCRIPTION FB 1 I Feedback. FB is an error-amplifier inverting input. INPUT_GND 2 I Ground connection for the voltage reference/error amplifier section. COMP 3 O Error amplifier output/LED cathode connection. RC networks may be connected between COMP, FB, and GND to stabilize the control loop of the dc/dc converter. BIAS 4 I Optocoupler LED anode. BIAS connects to the output voltage of the dc/dc converter or to some other suitable supply voltage through a resistor. NC 7,8 No connection. OUT 9 O Drive output. OUT is a pulse-width-modulated output. REG 10 O Regulator output. A 0.1-µF, typical, ceramic capacitor should be connected between REG and PWM_GND. VCC REF 11 I Supply voltage for PWM controller 12 O PWM 5-V reference output PWM_GND 13 I PWM ground connection RT/CT 14 VC 15 IS 16 2 Connection for external RC network to set PWM oscillator frequency Connection for integrating capacitor (0.1µF typ) to PWM_GND (terminal 13) I PWM current sense input POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 theory of operation The current through the LED is controlled by the precision reference amplifier according to the voltage error at FB, with respect to the internal 2.5-V reference. The light emitted by the LED is coupled to the PWM controller to change the modulation duty cycle and reduce the error voltage. The PWM controller is in the off state until VCC is greater than the turn-on threshold voltage level. Typically the controller turns on at 16 V. It stays in the on state until the voltage drops below the turn-off threshold of 10 V typical. Upon turning on, the controller generates an internal reference voltage Vref of 5 V, which controls the chip logic and can be used for low-power external applications. A voltage Vreg is also generated to supply current to charge an external capacitor Creg, which supplies instant current for the pulsing output. The oscillator shown in Figure 1 consists of an external resistance-capacitance (RC) network, a voltage comparator, logic, a 125-ns one-shot for the dead time, and a MOSFET used to discharge the external capacitor to ground each cycle. At the end of the reset period, CT charges toward the 5-V reference through timing resistor RT for a time given by one time constant RTCT. The oscillator period is given by: TOSC = RTCT + 0.125 µs. A current IIB(IS) supplied out of IS biases the current-sense resistor on the primary side of the power supply. If the voltage V(IS) at IS exceeds 1 V, the output pulse is reset. An internal current source I(VC) supplies a nominal current of –4 µA as a reference. This current charges a capacitor connected between VC and ground. The photodiode is connected internally in parallel with the capacitor. The light-generated photodiode current tends to discharge the capacitor until a steady-state balance is reached. When I(VC) is greater than the photodiode current, a net current is being sourced and the capacitor is charged. When I(VC) is lower than the photodiode current, a net current is being sinked and the capacitor is discharged. When I(VC) is equal to the photodiode current, the capacitor voltage stays constant. The voltage at VC is monitored by an internal comparator with a threshold voltage given by V(IS) + 2Vd, where Vd is a diode voltage drop of typically 0.7 V. Whenever VC is below this threshold, the output pulse is reset. The output pulse is enabled if V(IS) is less than 1 V and VC is greater than its threshold. The 5-V reference on the PWM chip is brought out on REF and can be used as a reference and/or supply for external circuits as long as the output current is limited to 20 mA and the power dissipation is not exceeded. It is recommended that a 0.1-F ceramic capacitor be connected between REF and PWM_GND. REF RT (see Note A) RT/CT CT PWM_GND NOTE A: tosc = RTCT + 0.125 µs Figure 1. Typical Oscillator Application POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 absolute maximum ratings over operating free-air temperature (unless otherwise noted)† LED/REF section Supply voltage range, VCC, BIAS to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 37 V Input current range at FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 µA to 10 mA LED forward current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA Input LED reverse voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V PWM section Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 30 V Input voltage at IS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 5 V Continuous supply current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 mA entire package Isolation voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 kV peak or dc (5.3 kVrms) Total continuous power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 100°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C † 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. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING NFD 1000 mW 8 mW/°C 640 mW 520 mW NFC 1000 mW 8 mW/°C 640 mW 520 mW recommended operating conditions Supply voltage range, VCC, PWM MIN MAX 11 30 V 2 A Peak output current, IO Output current, REF Oscillator frequency, fosc External timing resistance, RT External timing capacitance, CT 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT 0 20 mA 10 1000 kHz 2 39 kΩ 0.47 10 nF TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 electrical characteristics over recommended operating junction temperature range, VCC = 17 V, RT = 3.9 kΩ, CT = 1 nF (unless otherwise noted) voltage reference/error amplifier PARAMETER Vreff TEST CONDITIONS TA = 25°C, VO(COMP) = VI(FB) II(LED) = 10 mA, See Figure 2 Reference voltage MIN TYP MAX UNIT TIL5942 2.48 2.5 2.52 V TIL5942A 2.49 2.5 2.51 V Deviation of reference voltage over temperature TA = 25°C to 100°C, VO(COMP) = VI(FB) II(LED) = 10 mA, See Figure 2 25 DV I(LED) Ratio of reference voltage change to change in input light-emitting-diode voltage ∆VI(LED) = 4 V to 37 V, II(LED) = 10 mA 1.1 2 mV/V II(FB) Feedback input current II(LED) = 10 mA, See Figure 4 R3 = 10 kΩ 1.5 3 µA Iref(dev) Deviation of reference input current over full temperature range II(LED) = 10 mA, TA = 25°C to 100°C R3 = 10 kΩ, See Figure 4 IDRV(min) Minimum drive current TA = 25°C, VO(COMP) = VI(FB) II(off) Off-state input light-emitting diode current VI(LED) = 37 V, See Figure 5 VI(FB) = 0 Zka† Regulator output impedance VO(COMP) = VI(FB) IO(COMP) = 1 mA to 50 mA f ≤ 1 kHz Vref(dev) DVref mV µA 0.5 0.4 1 mA 0.18 0.5 µA 0.1 † This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology. LED PARAMETER TEST CONDITIONS VF Forward voltage TA = 25°C, IR LED reverse current VO = 6 V VO(COMP) = VI(FB), MIN II(LED) = 10 mA, See Figure 2 TYP MAX 1.2 1.4 UNIT V 10 µA PWM Section voltage reference PARAMETER TEST CONDITIONS Vref Vref(line reg) Reference voltage IO = 1 mA, TJ = 25°C VCC = 11 V to 30 V Vref(load reg) Reference load regulation Vref(temp f(t reg)) Reference temperature regulation Reference line regulation MIN TYP MAX 4.95 5 5.05 UNIT V 50 mV 25 mV IO = 0 mA to 20 mA TA = 25°C to 100°C –4 mV TA = 25°C to –40°C –4 mV oscillator PARAMETER fosc t(off) Frequency TEST CONDITIONS R = 3.9 kΩ, C = 1 nF Dead time, (minimum off time) MIN TYP MAX UNIT 225 250 275 kHz 100 148 200 ns Minimum timing ramp voltage 0.5 V Peak timing ramp voltage 3.2 V POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 electrical characteristics over recommended operating junction temperature range, VCC = 15 V, RT = 3.9 kΩ, CT = 1 nF (unless otherwise noted) (continued) current sense PARAMETER IIB(IS) td Input bias current, IS VIT(CS) Current sense threshold TEST CONDITIONS MIN Delay time to output TYP MAX UNIT –4 –10 µA 70 ns 0.9 1.0 1.1 V MIN TYP MAX UNIT –5 –10 µA integrating capacitor current PARAMETER IO(cap) IL TEST CONDITIONS Capacitor integrating current at VC with LED off Photodiode light current at VC, I(VC)(on) – I(VC)(off) II(LED) = 0 II(LED) = 10 mA, TA = 25°C 5 µA 8 PWM (pulse-width modulation) PARAMETER TEST CONDITIONS Maximum duty cycle CL = 1 nF, CREG = 0.1 µF Minimum duty cycle CL = 1 nF, CREG = 0.1 µF MIN TYP MAX UNIT 97% 0 UVLO (under voltage lockout) PARAMETER VIT(H) VIT(L) TEST CONDITIONS Start-up threshold voltage Minimum operating voltage after start-up MIN TYP MAX 15 16 17 UNIT V 9 10 11 V MIN TYP MAX 55 100 µA 13 16 mA supply current PARAMETER ICC(off) ICC(on) TEST CONDITIONS Start-up current VCC < 15 V VCC > 11 V Operating supply current 8 UNIT output section PARAMETER TEST CONDITIONS VOH High level output voltage High-level IO = –20 mA IO = –200 mA VOL Low level output voltage Low-level IO = 20 mA IO = 200 mA tr tf Rise time TJ = 25°C, TJ = 25°C, Fall time MIN TYP 11 11.7 10.5 11.2 MAX UNIT V 0.78 0.9 1.38 2 CL = 1 nF 20 35 ns CL = 1 nF 20 35 ns V regulator PARAMETER TEST CONDITIONS VO(REG) Regulator output Voltage IOS(REG) Regulator short-circuit output current 6 VCC = 17 V VO = 0 V POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MIN TYP MAX UNIT 12 12.5 13.5 V –9 –12.5 –15.0 mA TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 PARAMETER MEASUREMENT INFORMATION II(LED) A – PWM With PhotoDiode 2 4 + V 15 14 VF V VO(COMP) 16 1 15 + V II(LED) 16 1 14 R1 13 12 V 4 11 Vref – 2 VI(LED) 10 R2 9 3 PWM With PhotoDiode 13 12 11 10 Vref 9 3 Figure 3. ∆Vref /∆VI(LED) Test Circuit Figure 2. Vref, VF , Imin Test Circuit II(off) II(LED) 16 1 II(FB) A 15 14 2 4 V 16 1 A 15 PWM With PhotoDiode R3 14 13 VI(LED) 12 11 4 V 10 Figure 4. II(FB) Test Circuit POST OFFICE BOX 655303 PWM With PhotoDiode 13 12 11 10 Vref 9 3 2 3 9 Figure 5. II(off) Test Circuit • DALLAS, TEXAS 75265 7 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 TYPICAL CHARACTERISTICS Table of Graphs FIGURE 8 VF Vref LED forward voltage Free-air temperature 6 Input reference voltage Free-air temperature 7 II(FB) ICC(on) Feedback input current Free-air temperature 8 On-state supply current Free-air temperature 9 Vref Vreg PWM reference voltage Free-air temperature 10 PWM regulator voltage Free-air temperature 11 PWM relative oscillator frequency Free-air temperature 12 I(VC) IL Integrating capacitor current Free-air temperature 13 Photodiode current source Free-air temperature 14 IIB(IS) t(off) Sense current source Free-air temperature 15 PWM dead time Free-air temperature 16 IOS(REG) VOL(1) PWM regulator short-circuit current Free-air temperature 17 Low-state output voltage Free-air temperature 18 VOL(2) VIT(H) Low-state output voltage Free-air temperature 19 PWM turn-on threshold voltage Free-air temperature 20 VIT(L) PWM turn-off threshold voltage Free-air temperature 21 PWM threshold voltages showing hysteresis Free-air temperature 22 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 TYPICAL CHARACTERISTICS LED FORWARD VOLTAGE vs FREE-AIR TEMPERATURE INPUT REFERENCE VOLTAGE vs FREE-AIR TEMPERATURE 1.35 3 II(LED) = 10 mA 2.9 II(LED) = 10 mA 2.8 1.25 Vref – Input Reference Voltage – V VF – LED Forward Voltage – V 1.3 1.2 1.15 1.1 1.05 1 0.95 –40 –20 0 20 40 60 80 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2 –40 100 –20 TA – Free-Air Temperature – °C Figure 6 80 100 14.2 II(LED) = 10 mA R = 10 kΩ VCC = 17 V I CC(on) – On-State Supply Current - mA I I(FB) – Feedback Input Current – µA 60 ON-STATE SUPPLY CURRENT vs FREE-AIR TEMPERATURE 1.8 1.4 1.2 1 0.8 0.6 0.4 0.2 0 –40 40 Figure 7 FEEDBACK INPUT CURRENT vs FREE-AIR TEMPERATURE 1.6 20 0 TA – Free-Air Temperature – °C –20 0 20 40 60 80 100 14 13.8 13.6 13.4 13.2 13 12.8 12.6 12.4 –40 –20 TA – Free-Air Temperature – °C 0 20 40 60 80 100 TA – Free-Air Temperature – °C Figure 8 Figure 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 TYPICAL CHARACTERISTICS PWM REFERENCE VOLTAGE vs FREE-AIR TEMPERATURE PWM REGULATOR VOLTAGE vs FREE-AIR TEMPERATURE 5.05 12.53 VCC = 17 V IO = 10 mA VCC = 17 V Vreg – PWM Regulator Voltage – V Vref – PWM Reference Voltage – V 5.04 5.03 5.02 5.01 5 4.99 4.98 4.97 12.52 12.51 12.5 12.49 4.96 4.95 –40 –20 0 20 40 60 80 12.48 –40 100 –20 TA – Free-Air Temperature – °C 0 Figure 10 80 100 0 VCC = 17 V I (VC) – Integrating Capacitor Current – µA PWM Relative Oscillator Frequency – kHz 60 INTEGRATING CAPACITOR CURRENT vs FREE-AIR TEMPERATURE 1.025 1.02 1.015 1.01 1.005 1 0.995 –20 0 20 40 60 80 100 –1 –2 –3 –4 –5 –6 –7 –8 –40 –20 TA – Free-Air Temperature – °C 0 20 Figure 13 POST OFFICE BOX 655303 40 60 TA – Free-Air Temperature – °C Figure 12 10 40 Figure 11 PWM RELATIVE OSCILLATOR FREQUENCY vs FREE-AIR TEMPERATURE 0.99 –40 20 TA – Free-Air Temperature – °C • DALLAS, TEXAS 75265 80 100 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 TYPICAL CHARACTERISTICS PHOTODIODE CURRENT SOURCE vs FREE-AIR TEMPERATURE SENSE CURRENT SOURCE vs FREE-AIR TEMPERATURE 12 0 –1 10 I IB(IS) – Sense Current Source – µA Photodiode Current Source – µA VCC = 17 V IL(LED) = 10 mA 8 6 4 2 0 –40 –20 0 20 40 60 80 –2 –3 –4 –5 –6 –7 –8 –40 100 –20 TA – Free-Air Temperature – °C 0 Figure 14 160 155 150 145 140 135 20 40 60 80 100 TA – Free-Air Temperature – °C I OS(REG) – PWM Regulator Short-Circuit Current – mA t (off) – PWM Dead Time – ns 165 0 60 80 100 PWM REGULATOR SHORT-CIRCUIT CURRENT vs FREE-AIR TEMPERATURE 170 –20 40 Figure 15 PWM DEAD TIME vs FREE-AIR TEMPERATURE 130 –40 20 TA – Free-Air Temperature – °C 18 16 14 12 10 8 6 4 2 0 –40 –20 0 20 40 60 80 100 TA – Free-Air Temperature – °C Figure 16 Figure 17 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 TYPICAL CHARACTERISTICS LOW-STATE OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE LOW-STATE OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 2 IO = 200 mA 1.48 VOL(2) – Low-State Output Voltage – V VOL(1) – Low-State Output Voltage – V 1.8 1.5 VCC = 17 V IO = 20 mA 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 –40 –20 20 0 40 60 80 1.46 1.44 1.42 1.4 1.38 1.36 1.34 1.32 1.3 –40 100 –20 TA – Free-Air Temperature – °C Figure 18 VIT(L) – PWM Turn-Off Threshold Voltage – V VIT(H) – PWM Turn-On Threshold Voltage – V 16.2 100 16.15 16.1 16.05 16 15.95 15.9 15.85 15.8 20 40 60 80 100 10.2 10.15 10.1 10.05 10 9.95 9.9 9.85 9.8 9.75 –40 –20 TA – Free-Air Temperature – °C 0 20 Figure 21 POST OFFICE BOX 655303 40 60 TA – Free-Air Temperature – °C Figure 20 12 80 10.25 IO = 200 mA 0 60 PWM TURN-OFF THRESHOLD VOLTAGE vs FREE-AIR TEMPERATURE 16.25 –20 40 Figure 19 PWM TURN-ON THRESHOLD VOLTAGE vs FREE-AIR TEMPERATURE 15.75 –40 20 0 TA – Free-Air Temperature – °C • DALLAS, TEXAS 75265 80 100 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 TYPICAL CHARACTERISTICS PWM Threshold Voltages Showing Hysteresis – V PWM THRESHOLD VOLTAGES SHOWING HYSTERESIS vs FREE-AIR TEMPERATURE 18 16 VIT(H) 14 12 VIT(L) 10 8 6 4 2 0 –40 –20 0 20 40 60 80 100 TA – Free-Air Temperature – °C Figure 22 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 13 R1 680 kΩ, 0.5 W SECONDARY L1 t° C3 470 pF, 250 V MV1 275 V BR1 T1 AC + + C1 0.33 µF, 250 V C4 120 µF, 400 V R18 C19 470 µF + C20 100 µF, CR5 25 V C6 IN AC – GND OUT C21 0.1 µF, 63 V J2 5 CR6 N R9 C29 100 Ω 0.001 µF, 100 V C2 470 pF, 250 V J1 + – 12 V U2 uA79M12CKC 4 GND C16 R8 L2 3 R2 750 kΩ 12 V POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 C15 470 µF, + C17 100 µF, + C18 0.1 µF 2 GND C10 R7 R3 4.7 Ω L3 1 5V CR3 CR1 + C5 100 µF, 25 V C12 2200 µF, + C11 470 µF, + C14 0.1 µF R17 C22 Q1 IRFBC40 C23 R12 R11 1 kΩ R5 0.62 Ω C26 470 pF R4 150 Ω R6 1O kΩ 16 1 15 2 R14 100 Ω C9 R13 C24 0.1 µF 3 14 C27 1000 pF CR2 CR7 Q2 R15 R10 12 kΩ 12 11 C28 1 µF, 63 V C7 0.1 µF 13 U1 TIL5942, TIL5942A R16 4 5 NC 6 NC 10 7 9 8 NC NC C25 0.1 µF, 63 V Figure 23. Off-Line Power-Supply Application C8 C13 0.1 µF APPLICATION INFORMATION CR4 Template Release Date: 7–11–94 SOES040 – OCTOBER 1997 F1 3A TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER 14 RT1 L TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 Table 1. Bill of Materials for TIL5942 and TIL5942A Off-Line Power-Supply ITEM NO. REF DES PART NUMBER DESCRIPTION VENDOR 1 U1 TIL5942NFC IC, PWM controller Texas Instruments 2 U2 uA79M12CKC IC, voltage regulator Texas Instruments 3 Q1 IRFBC40 N-ch MOSFET 8A/600 V International Rectifier (IR) 4 Q2 S4015L SCR 100 V Teccor Electronics 5 MV1 ERZ-V10D431 MOV, 275 V Panasonic 6 BD1 BR86D Bridge, 2A/600 V Diodes, Inc. 7 RT1 CL–80 Thermistor Keystone 8 CR1 1N4148CT Rectifier, 100mA/100 V Diodes, Inc. 9 CR2 1N4148CT Rectifier, 100mA/100 V Diodes, Inc. 10 CR3 6TQ045 Rectifier, 7.5A/45 V International Rectifier (IR) 11 CR4 31DF2 Rectifier, 3A/200 V International Rectifier (IR) 12 CR5 11DF2 Rectifier, 1A/200 V International Rectifier (IR) 13 CR6 BYV26C Rectifier, 1A/600 V Philips 14 CR7 1N5232BCT Zener diode 5.6 V Diodes, Inc. 15 C1 ECQ-U2A334MV Capacitor, film, 0.33 µF/250Vac/20% Panasonic 16 C2 ECK-DGL471MB Capacitor, film, 470 pF/250Vac/20% Panasonic 17 C3 ECK-DGL471MB Capacitor, film, 470 pF/250Vac/20% Panasonic 18 C4 ECO-S2GP121CA Capacitor, electrolytic, 120 µF/400 V Panasonic 19 C5 ECE-A1EFS101 Capacitor, electrolytic, 100 µF/25 V Panasonic 20 C6 ECK-D3A332KBP Capacitor, ceramic, 3300 pF/1000 V Panasonic 21 C7 ECU-S2A104KBA Capacitor, ceramic, 0.1 µF/100 V Panasonic 22 C8 ECU-S2A333KBA Capacitor, ceramic, 0.033 µF/100 V Panasonic 23 C9 ECU-S2A471KBA Capacitor, ceramic, 470 pF/100 V Panasonic 24 C10 ECU-S2A222KBA Capacitor, ceramic, 2200 pF/100 V Panasonic 25 C11 ECE-A1AFS471 Capacitor, electrolytic, 470 µF/10 V Panasonic 26 C12 ECA–1AFQ222 Capacitor, electrolytic, 2200 µF/10 V Panasonic 27 C13 ECU-S2A104KBA Capacitor, ceramic, 0.1 µF/100 V Panasonic 28 C14 ECU-S2A104KBA Capacitor, ceramic, 0.1 µF/100 V Panasonic 29 C15 ECE-A1EFS471 Capacitor, electrolytic, 470 µF/25 V Panasonic 30 C16 ECU-S2A471KBA Capacitor, ceramic, 470 pF/100 V Panasonic 31 C17 ECE-A1EFS101 Capacitor, electrolytic, 100 µF/25 V Panasonic 32 C18 ECU-S2A104KBA Capacitor, ceramic, 0.1 µF/100 V Panasonic 33 C19 ECE-A1EFS471 Capacitor, electrolytic, 470 µF/25 V Panasonic 34 C20 ECE-A1EFS101 Capacitor, electrolytic, 100 µF/25 V Panasonic 35 C21 ECU-S2A104KBA Capacitor, ceramic, 0.1 µF/100 V Panasonic 36 C22 ECK-DGL471MB Capacitor, film, 470 pF/250Vac Panasonic 37 C23 ECK-DGL471MB Capacitor, film, 470 pF/250Vac Panasonic 38 C24 ECU-S2A104KBA Capacitor, ceramic, 0.1 µF/100 V Panasonic 39 C25 ECU-S2A104KBA Capacitor, ceramic, 0.1 µF/100 V Panasonic 40 C26 ECU-S2A471KBA Capacitor, ceramic, 470 pF/100 V Panasonic 41 C27 ECU-S1J102JCB Capacitor, ceramic, 1000 pF/63 V Panasonic POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 15 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 Table 1. Bill of Materials for TIL5942 and TIL5942A Off-Line Power-Supply (Continued) 16 ITEM NO. REF DES 42 C28 ECU-S1J105MEB Capacitor, ceramic, 1 µF/63 V Panasonic 43 C29 ECU-S1J102JCB Capacitor, ceramic, 1000 pF/100 V Panasonic 44 R1 Resistor, MF, 680 kΩ, 1/2 W, 5% 45 R2 Resistor, MF, 750 kΩ, 2 W, 5% 46 R3 Resistor, MF, 4.7 Ω, 1/4 W, 5% 47 R4 Resistor, MF, 150 Ω, 1/4 W, 5% 48 R5 Resistor, MF, 0.62 Ω, 1/4 W, 5% 49 R6 Resistor, MF, 10 kΩ, 2 W, 5% 50 R7 Resistor, MF, 47 Ω, 1/4 W, 5% 51 R8 Resistor, MF, 100 Ω, 1/4 W, 5% 52 R9 Resistor, MF, 100 Ω, 1/4 W, 5% 53 R10 Resistor, MF, 12 kΩ, 1/4 W, 5% 54 R11 Resistor, MF, 100 Ω, 1/4 W, 5% 55 R12 56 R13 57 R14 Resistor, MF, 100 Ω, 1 W, 5% 58 R15 Resistor, MF, 100 Ω, 1/4 W, 5% 59 R16 Resistor, MF, 150 kΩ, 1/4 W, 5% 60 R17 Resistor, MF, 1 kΩ, 1/4 W, 5% 61 R18 Resistor, MF, 4.7 kΩ, 2 W, 5% 62 T1 CYX01-13940-X4 Transformer, turns ratio Colitronics 63 L1 0571-0203-01 Common mode filter Bel 64 L2 PCV-0-0050-10 Inductor, choke Coilcraft 65 L3 PCV-0-0050-10 Inductor, choke Coilcraft 66 F1 Fuse, 3AG Bel 67 FH1 F052-ND Fuseclip 68 FH1 F052-ND Fuseclip 69 HS1 PF430 Heat sink Q1 Thermalloy 70 HS4 PF430 Heat sink CR3 Thermalloy 71 P1 42R05-3143-150 Connector, input Power Dynamics 72 P2 WM4403ND Connector, output Waldom 73 JMP1 Strap 74 JMP2 Strap 75 JMP3 Strap 76 PWB PC board PART NUMBER DESCRIPTION VENDOR Resistor, MF, 2.4 kΩ, 1/4 W, 5% 3306F-502-ND 5 kΩ, 1/4 W, POT POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Bourns TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 MECHANICAL DATA NFD (R-PDSO-G14) PLASTIC SMALL-OUTLINE PACKAGE 0.100 (2,54) 0.050 (1,27) 16 0.010 (0,25) M 9 0.010 (0,25) NOM 0.260 (6,60) 0.240 (6,10) 0.410 (10,41) 0.390 (9,91) 1 8 Gage Plane 0.790 (20,07) 0.782 (19,86) 0.010 (0,25) 0°– 8° 0.039 (0,99) 0.029 (0,74) 0.180 (4,57) 0.160 (4,06) Seating Plane 0.154 (3,91) 0.146 (3,71) 0.020 (0,51) MIN 0.004 (0,10) 4073330/A 08/97 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 17 TIL5942, TIL5942A CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER SOES040 – OCTOBER 1997 MECHANICAL DATA NFC (R-PDIP-T14) PLASTIC DUAL-IN-LINE PACKAGE 0.790 (20,07) 0.782 (19,86) 16 9 0.260 (6,60) 0.240 (6,10) 1 8 0.058 (1,47) 0.042 (1,07) 0.154 (3,91) 0.146 (3,71) 0.180 (4,57) 0.160 (4,06) 0.020 (0,51) MIN Seating Plane 0.125 (3,18) NOM 0.024 (0,61) 0.016 (0,41) 0.010 (0,25) M 0.010 (0,25) NOM 0.410 (10,41) 0.390 (9,91) 0.100 (2,54) 4110451/A 08/97 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. 18 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. TI warrants performance of its semiconductor products and related software 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. 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