NCP1396B ON Semiconductor, NCP1396B Datasheet
NCP1396B
Available stocks
Related parts for NCP1396B
NCP1396B Summary of contents
Page 1
... NCP1396A, NCP1396B Product Preview High Performance Resonant Mode Controller featuring High−voltage Drivers The NCP1396 A/B offers everything needed to build a reliable and rugged resonant mode power supply. Its unique architecture includes a 500 kHz Voltage Controller Oscillator whose control mode brings flexibility when an ORing function is a necessity, e.g. in multiple feedback paths implementations. Thanks to its proprietary high− ...
Page 2
HV R17 FB OVP U2A U3A Fast Input fmax C10 C9 C8 R19 R9 R14 R18 R13 R6 Soft− Timer Skip BO DT start Selection Pin Function Description Pin No. Pin ...
Page 3
Vdd Vdd Imin Vfb ≤ Vfb_off Vref Vref Rt IDT Imax for Vfb = 5 for Vfb < Vfb_min Vdd Imax Vfb = 5 Vdd Vref Itimer Fmax If FAULT Itimer else 0 ...
Page 4
Maximum Ratings Rating High Voltage bridge pin, pin 14 Floating supply voltage, ground referenced High side output voltage Low side output voltage Allowable output slew rate Power Supply voltage, pin 12 Maximum voltage, all pins (except pin 11 and 10) ...
Page 5
ELECTRICAL CHARACTERISTICS (For typical values T = 25°C, for min/max values T J Characteristic SUPPLY SECTION Turn−on threshold level, Vcc going up – A version Turn−on threshold level, Vcc going up – B version Minimum operating voltage after turn−on Startup ...
Page 6
ELECTRICAL CHARACTERISTICS (For typical values T = 25°C, for min/max values T J TIMERS Characteristic Timer charge current Timer duration with capacitor and resistor Timer recurrence in permanent fault, same values as above Voltage ...
Page 7
... TEMPERATURE ( C) Figure 5. Fsw min -40 -25 - TEMPERATURE ( C) Figure 7. Pulldown Resistor (Rfb) NCP1396A, NCP1396B 9.56 9.54 9.52 9.5 9.48 9.46 9.44 9.42 9.4 9.38 9.36 9. 110 125 501 500 499 498 497 496 495 494 493 - 110 125 1.06 1.055 1.05 1.045 1 ...
Page 8
... TEMPERATURE ( C) Figure 11. T_dead_min 1.97 1.968 1.966 1.964 1.962 1.96 1.958 -40 -25 - TEMPERATURE ( C) Figure 13. T_dead_max NCP1396A, NCP1396B 8 7.5 7 6.5 6 5.5 5 4.5 4 3.5 -40 - 110 125 296 295 294 293 292 291 290 289 288 287 286 -40 - ...
Page 9
... TEMPERATURE ( C) Figure 15. Brown-Out Reference (VBO) NCP1396A, NCP1396B 26.8 26.6 26.4 26.2 26 25.8 25.6 25.4 25 110 125 -40 -25 Figure 16. Brown-Out Hysteresis Current (IBO) http://onsemi.com 9 - 110 o TEMPERATURE ( C) 125 ...
Page 10
... TEMPERATURE ( C) Figure 19. Fsw min -40 -25 - TEMPERATURE ( C) Figure 21. Pulldown Resistor (Rfb) NCP1396A, NCP1396B 9.56 9.54 9.52 9.5 9.48 9.46 9.44 9.42 9.4 9.38 9.36 9. 110 125 -40 -25 502 501 500 499 498 497 496 495 -40 - 110 125 1.06 1.055 1 ...
Page 11
... TEMPERATURE ( C) Figure 25. T_dead_min 1.97 1.968 1.966 1.964 1.962 1.96 1.958 -40 -25 - TEMPERATURE ( C) Figure 27. T_dead_max NCP1396A, NCP1396B 8 7.5 7 6.5 6 5.5 5 4.5 4 3.5 - 110 125 294 293 292 291 290 289 288 287 286 285 284 - 110 125 3 ...
Page 12
... TEMPERATURE ( C) Figure 29. Brown-Out Reference (VBO) NCP1396A, NCP1396B 107 106 105 104 103 102 101 100 110 125 -40 -25 Figure 30. Brown-Out Hysteresis Current (IBO) http://onsemi.com 12 - TEMPERATURE ( C) 110 125 ...
Page 13
... PFC is stabilized before energizing the resonant tank. The A version features a 27 µA NCP1396A, NCP1396B Application information hysteresis current for the lowest consumption and the B version slightly increases this current to 100 µA in order to improve the noise immunity. • ...
Page 14
... Vcc Fmax FMAX sets the maximum Fsw FB Rfb 20k NCP1396A, NCP1396B Voltage-Controlled Oscillator / medical allowing operation from 100 kHz MHz. However division by two internally creates the two Q and Qbar outputs, the final effective signal on output Mlower and Mupper switches between 50 kHz and 500 kHz. The VCO is configured in such a way that if the feedback pin goes up, the switching frequency also goes up ...
Page 15
... take the default FB pin excursion numbers, 1 kHz, 5 500 kHz, then the VCO maximum slope will be 109.7kHz / V. NCP1396A, NCP1396B Figure 33 and 34 portray the frequency evolution depending on the feedback pin voltage level in a different frequency clamp combination. Figure 33. Maximal default excursion kΩ on pin ...
Page 16
... Rdt (kΩ) Figure 37. Dead-Time Resistor Selection NCP1396A, NCP1396B ORing capability frequency variation linked to an event appearance (instead Vcc = abruptly stopping pulses), then the FB pin lends itself 300 ns very well to the addition of other sweeping loops. Several ...
Page 17
... The typical range evolves between 100 ns (RDT = 3.5 kΩ) and 2 us (RDT = 83.5 kΩ). Figure 42 shows the typical waveforms. Soft-start sequence In resonant controllers, a soft-start is needed to avoid suddenly applying the full current into the Figure 40. Soft-start behavior NCP1396A, NCP1396B Icharge : Fsw min + Fsw max + - Idis Figure 39 ...
Page 18
... DC input voltages. Below a given level, the controller blocks the output pulses, above it, it authorizes them. The internal NCP1396A, NCP1396B released, no soft−start occurs to offer the best skip cycle behavior. However very possible to combine skip cycle and true fast fault input, e ...
Page 19
... Vbulk2 equals 250V, then we obtain: Rupper = 1MΩ Rlower = 2.86kΩ The bridge power dissipation is 400² / 1.00286MΩ = 160mW when front-end PFC stage delivers 400V. Figure 44 simulation result confirms our calculations. NCP1396A, NCP1396B 450 16.0 350 12.0 Vin 250 8 ...
Page 20
... This resonant controller differs from competitors thanks to its protection features. The device can react to various inputs like: - Fast events input: like an over-current condition, a need to shut down (sleep mode way to force a controlled burst mode (skip cycle at low output power): as soon as NCP1396A, NCP1396B Vbulk + - Vlatch Rupper ...
Page 21
... Rtimer. Now, when the timer capacitor voltage reaches 1V typical (VtimerOFF), the comparator instructs the internal logic to issues pulses clean soft-start sequence (soft-start is activated). Please note that the NCP1396A, NCP1396B 1 = fault ON/OFF ...
Page 22
... Then Vout slowly drops, the loop reacts by decreasing the feedback level which, in turn, unlocks the pulses, Vout goes up again and so on: we are in skip cycle mode. NCP1396A, NCP1396B Startup behaviour When the Vcc voltage grows-up, the internal current consumption is kept to Istrup, allowing to crank- up the converter via a resistor connected to the bulk capacitor ...
Page 23
... In that case, the VCC(min) comparator stops the output pulses whenever it NCP1396A, NCP1396B is activated, that is to say, when Vcc falls below 10V typical. At this time, the Vcc pin still receives its bias current from the startup resistor and heads toward VCC via the Vcc capacitor ...
Page 24
... To applications where the resonant controller is powered from a standby power supply, the startup level is 10V typically and allows for the direct a connection from a NCP1396A, NCP1396B 12V source. Thanks to this NCP1396B, simple ON/OFF ON operation is therefore feasible. The high-voltage driver the opposite, for circuitry, requiring an external high-voltage diode for the capacitor refueling path ...
Page 25
... The device incorporates an upper UVLO circuitry that makes sure enough Vgs is available for the upper side MOSFET. The B and A outputs are delivered by the internal logic, as figure 46 testifies. A delay is inserted in the lower rail to ensure good matching between these propagating signals. NCP1396A, NCP1396B Pulse Level trigger shifter S ...
Page 26
0.25 (0.010) −A− −T− SEATING PLANE 0.25 (0.010 PACKAGE DIMENSIONS PDIP−16 P SUFFIX ...
Page 27
... SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...