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TFS758HG

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TFS758HG

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Part Number TFS758HG
Manufacturer Power Integrations
Description IC PWR SUPPLY CTLR 236W ESIP-16
Datasheet TFS758HG Datasheet
Package 16-SIP, 12 Leads, Exposed Pad, Formed Leads
In Stock 26,000 piece(s)
Unit Price $ 6.5200 *
Lead Time Can Ship Immediately
Estimated Delivery Time Jun 1 - Jun 6 (Choose Expedited Shipping)
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Part Number # TFS758HG (PMIC - AC DC Converters, Offline Switchers) is manufactured by Power Integrations and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

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TFS758HG Specifications

ManufacturerPower Integrations
CategoryIntegrated Circuits (ICs) - PMIC - AC DC Converters, Offline Switchers
Datasheet TFS758HGDatasheet
Package16-SIP, 12 Leads, Exposed Pad, Formed Leads
SeriesHiperTFS?
Output IsolationIsolated
Internal Switch(s)Yes
Voltage - Breakdown530V, 725V
TopologyFlyback, Forward
Voltage - Start Up12.1V
Voltage - Supply (Vcc/Vdd)11.1 V ~ 13.4 V
Duty Cycle70%
Frequency - Switching66kHz
Power (Watts)236W
Fault ProtectionCurrent Limiting, Over Temperature, Over Voltage, Short Circuit
Control FeaturesEN
Operating Temperature-40°C ~ 150°C (TJ)
Package / Case16-SIP, 12 Leads, Exposed Pad, Formed Leads
Supplier Device Package16-eSIPB
Mounting TypeThrough Hole

TFS758HG Datasheet

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TFS757-764HG HiperTFS Family www.power.com April 2015 Combined Two-Switch Forward and Flyback Power Supply Controllers with Integrated High Voltage MOSFETs ™ HD DC Input Main Output Auxiliary/Standby Output RTN G S HiperTFS VDDH L FB FB EN EN BP DSB EN FB Control, Gate Drivers, Level Shift R D HS PI-6200-102910 Two-Switch Forward Transformer Flyback Transformer Figure 1. Simplified Schematic of Two-Switch Forward and Flyback Converter. Key Benefits • Single chip solution for two-switch forward main and flyback standby • High integration allows smaller form factor and higher power density designs • Incorporates control, gate drivers, and three power MOSFETS • Level shift technology eliminates need for pulse transformer • Protection features include: UV, OV, OTP, OCP, and SCP • Transformer reset control • Prevents transformer saturation under all conditions • Allows >50% duty cycle operation • Reduces primary side RMS currents and conduction losses • Standby supply provides built-in overload power compensation • Up to 434 W total output power in a highly compact package • Up to 550 W peak • High efficiency solution easily enables design to meet stringent efficiency specifications • >90% efficiency at full load • No-load regulation and low losses at light-load • Simple clip mounting to heat sink without need for insulation pad • Halogen free and RoHS compliant Applications • PC • Printer • LCD TV • Video game consoles • High-power adapters • Industrial and appliance high-power adapters Output Power Table Product Two-Switched Forward 380 V Flyback 100 V - 400 V Continuous (25 °C) Continuous (50 °C) Peak (50 °C) 50 °C TFS757HG 193 W 163 W 228 W 20 W TFS758HG 236 W 200 W 278 W 20 W TFS759HG 280 W 235 W 309 W 20 W TFS760HG 305 W 258 W 358 W 20 W TFS761HG 326 W 276 W 383 W 20 W TFS762HG 360 W 304 W 407 W 20 W TFS763HG 388 W 327 W 455 W 20 W TFS764HG 414 W 344 W 530 W 20 W Table 1. Output Power Table (See Notes on page 13).

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Rev. E 04/15 2 TFS757-764HG www.power.com Section List Description .................................................................................................................................................................. 3 Product Highlights ...................................................................................................................................................... 3 Pin Functional Description ......................................................................................................................................... 5 Pin Configuration ...................................................................................................................................................... 5 Functional Block Diagram .....................................................................................................................................6-7 Functional Description ............................................................................................................................................... 8 Output Power Table ............................................................................................................................................... 13 Design, Assembly, and Layout Considerations .................................................................................................... 14 Application Example ................................................................................................................................................. 20 Absolute Maximum Ratings ..................................................................................................................................... 23 Parameter Table ..................................................................................................................................................... 23 Typical Performance Characteristics .................................................................................................................29-33 Package Details ........................................................................................................................................................ 34 Part Ordering Information......................................................................................................................................... 35 Part Marking Information ......................................................................................................................................... 35

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Rev. E 04/15 3 TFS757-764HG www.power.com Description The HiperTFS device family members incorporate both a high-power two-switch-forward converter and a mid-power flyback (standby) converter into a single, low-profile eSIP™ power package. The single chip solution provides the controllers for the two-switch-forward and flyback converters, high- and low-side drivers, all three of the high-voltage power MOSFETs, and eliminates the converter’s need for costly external pulse transformers. The device is ideal for high power applications that require both a main power converter (two-switch forward) up to 414 W, and standby converter (flyback) up to 20 W. HiperTFS includes Power Integrations’ standard set of comprehen- sive protection features, such as integrated soft-start, fault and over-load protection, and hysteretic thermal shutdown. HiperTFS utilizes advanced power packaging technology that simplifies the complexity of two-switch forward layout, mounting and thermal management, while providing very high power capabilities in a single compact package. The devices operate over a wide input voltage range, and can be used following a power-factor correction stage such as HiperPFS. Two-switch-forward power converters are often selected for applications demanding cost-effective efficiency, fast transient response, and accurate tolerance to line voltage fluctuation. The two-switch-forward controller incorporated into HiperTFS devices improves on the classic topology by allowing operation considerably above 60% duty cycle. This improvement reduces RMS currents conduction losses, minimizes the size and cost of the bulk capacitor, and minimizes output diode voltage ratings. The advanced design also includes transformer flux reset control (saturation protection) and charge-recovery switching of the high-side MOSFET, which reduces switching losses. This combination of innovations yields an extremely efficient power supply with smaller MOSFETs, fewer passives and discrete components, and a lower-cost transformer. HiperTFS’s flyback standby controller and MOSFET solution is based on the highly popular TinySwitch™ technology used in billions of power converter ICs due to its simplicity of operation, light load efficiency, and rugged, reliable, performance. This flyback converter can provide up to 20 W of output power and the built in overload power compensation reduces component design margin. Product Highlights Protected Two-Switch Forward and Flyback Combination Solution • Incorporates three high-voltage power MOSFETs, main and standby controllers, and gate drivers • Level shift technology eliminates need for pulse transformer • Programmable line undervoltage (UV) detection prevents turn-off glitches • Programmable line overvoltage (OV) detection; latching and non-latching • Accurate hysteretic thermal shutdown (OTP) • Accurate selectable current limit (main and standby) • Fully integrated soft-start for minimum start-up stress • Simple fast AC reset • Reduced EMI • Synchronized 66 kHz forward and 132 kHz flyback converters • Frequency jitter • Eliminates up to 30 discrete components for higher reliability and lower cost Asymmetrical Two-Switch Forward Reduces Losses • Allows >50% duty cycle operation • Reduces primary side RMS currents and conduction losses • Minimizes the size and cost of the bulk capacitor • Allows reduced capacitance or longer hold-up time • Allows lower voltage output diodes • Transformer reset control • Prevents transformer saturation under all conditions • Extends duty cycle to satisfy AC cycle drop out ride through • Duty cycle soft-start with 115% current limit boost • Satisfies 2 ms ~ 20 ms start-up with large capacitance at output • Remote ON/OFF function • Voltage mode controller with current limit 20 W Flyback with Selectable Power Limit • TinySwitch-III based converter • Selectable power limit (10 W, 12.5 W, 15 W, or 20 W) • Built-in overload power compensation • Flat overload power vs. input voltage • Reduces component stress during overload conditions • Reduces required design margin for transformer and output diode • Output overvoltage (OV) protection with fast AC reset • Latching, non-latching, or auto-restart • Output short-circuit protection (SCP) with auto-restart • Output over-current protection (OCP) Advanced Package for High Power Applications • 434 W output power capability in a highly compact package • Up to 550 W peak • Simple clip mounting to heat sink • Can be directly connected to heat sink without insulation pad • Provides thermal impedance equivalent to a TO-220 • Heat slug connected to ground potential for low EMI • Staggered pin arrangement for simple routing of board traces and high-voltage creepage requirements • Single power package for two power converters reduces assembly costs layout size

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Rev. E 04/15 4 TFS757-764HG www.power.com Table 2. Summary of Differences Between HiperTFS and Other Typical High Power Supplies. Function Typical Two-Switch Forward HiperTFS Advantages of HiperTFS Nominal Duty Cycle 33% 45% Wider duty cycle reduces RMS switch currents by 17%. Reduces RDS(ON) losses by 31%Maximum Duty Cycle <50% 63% Switch Current (RMS) 100% 83% Output Catch Diode VO + VD/DMAX VO + VD/DMAX Lower losses. Wider DMAX lowers catch diode rating by (1-(50%/63%)) = 21% reduction in catch diode voltage rating Clamp Voltage Reset diodes from zero to VIN Reset from zero to (VIN + 130) With fast/slow diode combination, allows charge recovery to limit high-side COSS loss Thermal Shutdown --- 118 °C Shutdown / 55 °C hysteresis HiperTFS provides integrated OTP device protection Current Sense Resistor 0.5 V drop (0.33 W at 300 W) Sense resistor not required Improved efficiency. MOSFET RDS(ON) sense eliminated need for sense resistor High-Side Drive Requires gate-drive transformer (high cost) Built in high-side drive Lower cost; component elimination. Removes high-cost gate-drive transformer (EE10 or toroid) Component Count Higher Lower Saves up to 50 components, depending on specification. TinySwitch Overload Power Compensation vs. Input Voltage --- Built-in compensation Safer design; easier to design power supply. Flattens overload output power over line voltages Package Creepage TO-220 = 1.17 mm eSIP16/12 = 2.3 mm/ 3.3 mm HiperTFS meets functional safety spacing at package pins Package Assembly 2 × TO-220 package, 2 × SIL (insulation) 1 Package No SIL (insulation) pad required

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Rev. E 04/15 5 TFS757-764HG www.power.com Pin Functional Description MAIN DRAIN (D) Pin Drain of the low-side MOSFET transistor forward converter. STANDBY DRAIN (DSB) Pin Drain of the MOSFET of standby power supply. GROUND (G) Pin This pin gives a signal current path to the substrate of the low-side controller. This pin is provided to allow a separate Kelvin connection to the substrate of the low-side controller to eliminate inductive voltages that might be developed by high switching currents in the SOURCE pin. The GROUND pin is not intended to carrier high currents, instead it is intended as a voltage-reference connection only. SOURCE (S) Pin SOURCE pin that is common to both the standby and main supplies. RESET (R) Pin This pin provides information to limit the maximum duty cycle as a function of the current fed into the RESET pin during the off-time of the main converter MOSFET. This pin can also be pulled up to bypass to signal remote ON/OFF of the main converter only. ENABLE (EN) Pin This is the ENABLE pin for the standby controller. Prior to the start-up a resistor connected from ENABLE to BYPASS, can be detected to select one of several internal current limits. LINE-SENSE (L) Pin This pin provides input bulk voltage line-sense function. This information is used by the undervoltage and overvoltage detection circuits for both main and standby. The pin can also be pulled up to BYPASS or be pulled down to SOURCE to implement a remote ON/OFF of both standby and main supplies simultaneously. The LINE-SENSE pin works in conjunction with the RESET pin to implement a duty-cycle limit function. Also the LINE-SENSE pin compensates the value of standby current limit so as to flatten the output overload response as a function of input voltage. FEEDBACK (FB) Pin This pin provides feedback for the main two transistor forward converter. An increase in current sink from FEEDBACK pin to ground, will lead to a reduction in operating duty cycle. This pin also selects the main device current limit at start-up (in a similar manner to ENABLE pin). BYPASS (BP) Pin This is the decoupled operating voltage pin for the low-side controller. At start-up the bypass capacitor is charged from an internal device current source. During normal operation the capacitor voltage is maintained by drawing current from the low-side bias winding on the standby power supply. This pin is also used to implement remote ON/OFF for the main controller. This is done by driving extra current into the BYPASS pin when we want to turn-on the Main controller. The BYPASS pin also implements a latch-off function to disable standby and main when the BP pin current exceeds latching threshold. Latch is reset when LINE-SENSE pin falls below UV (off) standby threshold. HIGH-SIDE OPERATING VOLTAGE (VDDH) Pin This is the high-side bias (VDD) of approximately 11.5 V. This voltage is maintained with current from a high-side bias winding on the main transformer and/or from a bootstrap diode from the low-side standby bias supply. HIGH-SIDE SOURCE (HS) Pin SOURCE pin of the high-side MOSFET. HIGH-SIDE DRAIN (HD) Pin DRAIN pin of the high-side MOSFET. This MOSFET is floating with respect to low-side source and ground. Figure 2. Pin Configuration. PI-5290-110510 16D D S B G S R E N H D H D H S S S L F B H S H D V D D H B P 141310 1191 3 5 6 7 8 H Package (eSIP-16/12) Exposed Pad (Backside) Internally Connected to SOURCE Pin (see eSIP-16B Package Drawing) Exposed Metal (On Edge) Internally Connected

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Rev. E 04/15 6 TFS757-764HG www.power.com PI-5263-021511 PWM COMPARATOR PWM INPUT THERMAL SD CONTROLLED TURN-ON GATE DRIVER CURRENT LIMIT COMPARATOR SOURCE (S) S R Q - + BYPASS (BP) LINE-SENSE (L) RESET (R) FEEDBACK (FB) and MAIN CURRENT LIMIT SELECT STOP HSD1 HSD2 FAULT PRESENT LV SAWD2MAX CLK2 MAIN REMOTE-ON + - LEADING EDGE BLANKING R L DUTY CYCLE LIMIT DMAX GATE CLK ON DRAIN (D) VBG LINE SENSE LV POWER ON ILIMIT SELECT VILIMIT DSS SOFT-START PWM INPUT REMOTE OFF REMOTE OFF GATE HS 3 V+VT Figure 3. Functional Block Diagram for Two-Switch Forward Converter. HIGH-SIDE OPERATING VOLTAGE (VDDH) HSD1 HSD2 12 V 11.1 V 9.9 V HIGH-SIDE DRAIN (HD) HIGH-SIDE SOURCE (HS) VDDH UNDERVOLTAGE PI-5516-060410 + S R Q DISCRIMINATOR

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Rev. E 04/15 7 TFS757-764HG www.power.com Figure 4. Functional Block Diagram for Flyback/Standby Converter. PI-5264-020510 CLOCK CLK2 5.7 V 4.7 V SOURCE (S) S R Q DCMAX D2MAX SAW BYPASS (BP) + - VILIMIT FAULT PRESENT CURRENT LIMIT COMPARATOR ENABLE LEADING EDGE BLANKING THERMAL SHUTDOWN + - STANDBY DRAIN (DSB) BYPASS PIN UNDER-VOLTAGE LV (LINE VOLTAGE) SAW D2MAX CLK2 FAULT PRESENT OSCILLATOR THERMAL SD 1.0 V + VTENABLE (EN) and STANDBY CURREN LIMIT SELECT Q 115 µA RESET AUTO- RESTART COUNTER JITTER 1.0 V 6.0 V ENABLE PULL UP RESISTOR SELECT AND CURRENT LIMIT STATE MACHINE MAIN REMOTE ON/ OVP LATCH OFF VIN ILIMIT ADJUST MAIN REMOTE ON REGULATOR 5.7 V

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Rev. E 04/15 8 TFS757-764HG www.power.com Functional Description The HiperTFS contains two switch-mode power supply controllers and associated low-side MOSFET’s along with high-side driver and high-side MOSFET. • The HiperTFS two-switch forward includes a controller along with low-side power MOSFET, high-side power MOSFET and high-side driver. This device operates in voltage mode (linear duty-cycle control) at fixed frequency (exactly half the operat- ing frequency of the standby controller). The control converts a current input (FEEDBACK pin), to a duty-cycle at the open drain MOSFET MAIN DRAIN pin decreasing duty-cycle with increasing sourced current from the FEEDBACK pin. • The HiperTFS flyback includes a controller and power MOSFET which is based on TinySwitch-III. This device operates in multi-level ON/OFF current limit control mode. The open drain MOSFET (STANDBY DRAIN pin) is turned on when the sourced current from the ENABLE pin is below the threshold and switching is disabled when the ENABLE pin current is above the threshold. In addition to the basic features, such as the high-voltage start-up, the cycle-by-cycle current limiting, loop compensation circuitry, auto-restart and thermal shutdown, the HiperTFS main controller incorporates many additional functions that reduce system cost, increase power supply performance and design flexibility. Main Converter General Introduction The Main converter for the HiperTFS, is a two-switch forward converter (although the HiperTFS could be used with other two-switch topologies). This topology involves a low-side and high-side power MOSFET, both of which are switched at the same time. In the case of the HiperTFS, the low-side MOSFET is a 725 V MOSFET (with the substrate connected to the SOURCE pin). The high-side MOSFET is a 530 V MOSFET (with the substrate connected to the HIGH-SIDE DRAIN (HD) pin). As such the substrate of both low-side and high-side MOSFET’s are tied to quiet circuit nodes (0 V and VIN respectively), meaning that both MOSFETs have electrically quiet substrates – good for EMI. The low-side MOSFET has a very low COSS capacitance and thus can be hard-switched without performance penalty. Due to the external clamp configuration it is possible to substantially soft-switch the high-side MOSFET at high-loads (thus eliminating a large proportion of high-side capacitive switching loss) and improving efficiency. The higher breakdown voltage on the low-side MOSFET allows the transformer reset voltage to exceed the input voltage, and thus allow operation at duty cycles greater than 50%. Higher duty cycle operation leads to lower RMS switch currents and also lower output diode voltage-rating, both of which contribute to improved efficiency. The HiperTFS also contains a high-side driver to control the high-side MOSFET. This internal high-side driver eliminates the need for a gate-driver transformer, an expensive component that is required for many other two-switch forward circuits. Main Start-Up Operation Once the flyback (standby) converter is up and running, the main converter can be enabled by two functions. The first condition is that the BYPASS pin remote-on current must exceed the remote-on threshold (IBP(ON)), provided by an external remote ON/OFF circuit. This current threshold has a hysteresis to prevent noise interference. Once the BYPASS remote-on has been achieved, the HiperTFS also requires that the LINE- SENSE pin current exceeds the UV Main-on (IL(MA-UVON)), which corresponds to approximately 315 VDC input voltage when using a 4 MW LINE-SENSE pin resistor. Once this LINE-SENSE pin threshold has been achieved the HiperTFS will enter a 12 ms pre-charge period (tD(CH)) to allow the PFC-boost stage to reach regulation before the main applies a load to the bulk-capacitor. Also during this pre-charge period the high-side driver is charged via the boot-strap diode from the low-side auxiliary voltage, and is charged when the main low-side MOSFET turns Figure 5. Switching Frequency Jitter (Idealized VDRAIN Waveforms). P I- 45 30 -0 41 10 7 fOSC - 4 ms Time Switching Frequency VDRAIN fOSC + Figure 6. Supply Start-Up Sequence by Remote ON. VIN Standby Output Main Output 12 ms 385 V Main Primary Current Remote ON 12 ms 32 ms t t t t t PI-5619a-102710 100% ILIM 115% ILIM

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Rev. E 04/15 9 TFS757-764HG www.power.com on, while the main high-side MOSFET is held off. By the end of the pre-charge period, the PFC-boost voltage should be at or above the nominal boost voltage. The HiperTFS begins switching, going through the soft-start period (tSS). During the soft-start period the maximum duty cycle starts at 30% and is ramped during a 12 ms period to the maximum. The ramped duty cycle controls the rise slew rate of the output during start-up, allowing well controlled start-up and also facilitates a smooth transition when the control loop takes over regulation towards the end of soft-start. Also during a 32 ms period (starting at the beginning of soft-start), the main current limit is boosted to 115% of the nominal selected Main current. This allows the main to start-up within the required period for the application (typically < 20 ms for PC main applications), when there is a substantial capacitive load on the output. After the soft-start period, the current limit returns to 100% of the nominal selected current limit. Main Converter Control FEEDBACK (FB) Pin Operation The FEEDBACK pin is the input for control loop feedback from the main control loop. During normal operation the FEEDBACK pin is used to provide duty cycle control for the main converter. The system output voltage is detected and converted into a feedback current. The main converter duty cycle will reduce as more current is sourced from the FEEDBACK pin, reaching zero duty cycle at approximately 2.1 mA. The nominal voltage of the FEEDBACK pin is maintained at approximately 3.5 V. An internal pole on the FEEDBACK pin is set to approximately 12 kHz, in order to facilitate optimal control loop response. The maximum duty cycle of the main converter is defined by the LINE-SENSE pin and RESET pin behavior and is a dynamically calculated value according to cycle-by-cycle conditions on the LINE-SENSE pin and RESET pin. Main High-Side Driver The high-side driver is a device that is electrically floating at the potential of the HIGH-SIDE MOSFET SOURCE (HS) pin. This device provides gate-drive for the high-side Main MOSFET. The low-side main and high-side main MOSFET’s switch simul- taneously. The high-side driver has a HIGH-SIDE OPERATING VOLTAGE supply pin. External circuitry provides a current source into this HIGH-SIDE OPERATING VOLTAGE pin. The high-side operating voltage has an internal 12 V shunt-regulator. The device consumes approximately 2 mA when driving the high-side MOSFET. The HIGH-SIDE OPERATING VOLTAGE pin has an undervoltage lock-out threshold, to prevent gate-drive when the supply voltage drops below a safe threshold. At power-up the high-side driver remains in the off-state, until the HIGH-SIDE OPERATING VOLTAGE pin is charged above 10.5 V, at which point the high-side driver becomes active. The high-side driver is initially charged via a boot-strap diode connected via a diode to the HIGH-SIDE OPERATING VOLTAGE pin from the low-side standby auxiliary supply (approximately 12 V). During start-up the high-side MOSFET remains off, but the low-side MOSFET is turned on for a period of 14 ms to allow pre-charge of the high-side operating voltage to 12 V. After this period, the high- side operating voltage is supplied by a forward-winding coupled to the main transformer. This floating winding provides energy every time the main converter switches one cycle. The operating power for high-side operating voltage can also be provided from a floating winding on the standby supply. However this would continue delivering power even when the main converter is in remote-off, and thus is considered undesirable from a standby light-load efficiency point of view. Once the high-side driver is operating it receives level-shifted drive commands from the low-side device. These drive commands cause both turn-on and turn-off drive of the high-side main MOSFET simultaneously with that of the low-side main MOSFET. The high-side driver also contains a thermal shutdown on-chip, but this is set to a temperature above the thermal shutdown temperature of the low-side device. Thus the low-side will always shutdown first. Main Converter Maximum Duty Cycle The LINE-SENSE pin resistor converts the input voltage into an LINE-SENSE pin current signal. The RESET pin resistor converts the reset voltage into an RESET pin current signal. The LINE-SENSE pin and RESET pin currents allow the HiperTFS to determine a maximum duty cycle envelope on a cycle-by-cycle basis. This feature ensures sufficient time for transformer reset on a cycle-by-cycle basis and also protects against single-cycle transformer saturation and at high-input voltage by limiting the maximum duty cycle to prevent the transformer from reaching an unsafe flux density during the on-time period. Both of these features allow the optimal performance to be obtained from the main transformer. The duty cycle limit is trimmed during production. The LINE-SENSE pin and RESET pin are sampled just before the turn-on of the next main cycle. This is done to sample at a point when there is minimal noise in the system. Due to the low current signal input to the LINE-SENSE pin and RESET pin, care should be taken to prevent noise injection on these pins (see Applications section layout guidelines for details). Main On-Chip Current Limit with External Selection During start-up, the FEEDBACK pin and ENABLE pin are both used to select internal current limits for the main and standby converters respectively. The detection period occurs at the initial start-up of the device, and before the main or standby MOSFETs start switching. This is done to minimize noise interference. Figure 7. PWM Duty Cycle vs. Control Current. 63% 78% 0% 1 mA 2.1 mA Duty (D) FEEDBACK Pin Current IFB IL = 60 µA IR = 170 µA Typical IL and IR currents at VMIN Limited by L & R pin duty limit PI-5885-082610

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May 10, 2020

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April 12, 2020

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