IRPLHALO1E International Rectifier, IRPLHALO1E Datasheet
IRPLHALO1E
Specifications of IRPLHALO1E
Related parts for IRPLHALO1E
IRPLHALO1E Summary of contents
Page 1
... A new approach, using power MOSFETs driven by a control IC incorporating additional functionality tailored to this application, is realized in the IR2161 and demonstrated in a typical application by the IRPLHALO1E reference design kit. The IR2161 is a dedicated intelligent half bridge driver IC for a Halogen convertor (1) or “Electronic Transformer” ...
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... Functional description of the IR2161 based Halogen convertor 220VAC CLF INPUT DCP1 DBOOT DCP2 DS VCC CVCC CVCC1 2 COM CBOOT CSD CSD CF Fig. 1 IRPLHALO1E Circuit Schematic CSNUB RB1 RB2 12VAC RCS OUTPUT www.irf.com ...
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... The IC also includes adaptive dead time to realize soft-switching and allow cool running MOSFETs (and improves the EMI behavior due to frequency modulation during the line voltage half cycle). Some points to consider when comparing a Halogen convertor circuit design with an electronic ballast for fluorescent lamps: www.irf.com IRPLHALO1E 3 ...
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... IRPLHALO1E • Filament Lamp is a Resistive Load • No Preheat / Ignition is required • DC Bus is full wave rectified line without smoothing • Close to Unity Power Factor is inherent in system • Can be dimmed with Triac (standard domestic type) dimmer • Dimming is achieved by PHASE CUTTING of the AC line • ...
Page 5
... When the IC starts oscillating the frequency is initially very high (about 125kHz). This causes the output voltage of the convertor to be lower since the HF transformer in the system has a fixed primary leakage inductance that will present a higher impedance at higher frequency allowing less www.irf.com IRPLHALO1E 5 ...
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... IRPLHALO1E AC voltage to appear across the primary. The reduced output voltage will naturally result in a reduced current in the lamp which eases the inrush current thus avoiding tripping of the shutdown circuit and easing stress on the lamp filament as well as high current in the half bridge MOSFETs (M1 and M2). ...
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... Under this condition there is also an excessive current in the half bridge that is sufficient to cause heating and eventual failure but over a longer period of time. The threshold for overload shutdown is approximately 50% www.irf.com IRPLHALO1E 7 ...
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... IRPLHALO1E above maximum load with a delay of approximately 0.5s. This is based on a current waveform that has a sinusoidal envelope with a high frequency square wave component with 50% duty cycle. Both shutdown modes have auto reset, which allows the oscillator to start again approximately 1s after shutting down. This is so that if the fault condition is removed the system can start operating normally again without the line voltage having to be switched off and back on again ...
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... The value of the current sense resistor RCS is critical to achieve correct operation in the IR2161 based Halogen con- vertor. www.irf.com Fig. 3 Short circuit and Overload detection ° assumed that the die temperature will be approxi- Fig. 4 Calculation of the peak half bridge current IRPLHALO1E DC Bus Voltage VS 1/2 DC Bus Voltage LOAD VCSpk ...
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... IRPLHALO1E Ignoring the output transformer we can assume for this calculation that the load is connected from the half bridge to the mid point of the two output capacitors and that the voltage at this point will be half the DC bus voltage. The RMS voltage of the DC bus is the same as that of the AC line so we can see that the RMS voltage across the load shown in Figure 4, will be half the RMS voltage of the line ...
Page 11
... As a rule the MOSFET breakdown voltage may be used to calculate the primary turns such that the core will not saturate at minimum frequency and maximum temperature. If the core saturates a large current will flow in the half bridge and may trigger the short circuit protection when the convertor is connected via a dimmer. www.irf.com 2 P LOAD 062 W IRPLHALO1E 11 ...
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... IRPLHALO1E The transformer selection procedure is as follows: 1. Select the correct core size for the maximum load at 30kHz. Use the manufacturer’s core data to determine the maximum throughput power at this frequency. 2. Calculate the number of turns required at the primary Np (min) Where Bmax (maximum flux density in Teslas) can be obtained from the core manufactur- ...
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... Note Ready wound toroidal output transformers as used in the IRPLHALO1E design kit are available from Vogt or Kaschke. These have many advantages including high isolation breakdown capability because of the moulded plastic separator between the primary and secondary. ...
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... IRPLHALO1E In the event of the voltage at the half bridge failing to slew all the way down to COM the adaptive dead time circuit will time out after 1 to 1.5uS and switch on the relevant MOSFET thus operating with hard switching. This could happen during the first few cycles after start up. It should never be the case in normal running conditions unless the load is very light or the primary leakage induc- tance is excessive or that an unnecessarily large snubber capacitor is present ...
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... EMC Issues The IRPLHALO1E demo board has not been EMC tested although a filter capacitor CLF and inductor LF are fitted. The capacitor value may not be increased beyond a certain point to improve filtering as this causes problems when dimming with triac type phase cut dimmers, i.e. that the phase shift introduced can prevent the triac current dropping below its holding current at the end of the line voltage half cycle and so the dimmer no longer functions ...
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... As in most electronic power applications, capacitors and resistors are the components most likely to fail due to stress over time and and high operating temperatures. Careful selection of these will significantly increase the reliability of the product. 16 Fig. 7 IRPLHALO1E PCB Layout www.irf.com ...
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... BC Components 5073NW220K0J12AFX BC Components 2322 329 03271BC BC Components ERJ-8GEYJ220V Panasonic ECG Huntingdon Electric ALSR1F-.33R-ND Inc 5073NW1K000J12AFX BC Components IR2161 IR Amp Tyco 2-641260-1 Electronics IRF740 IR 236-105 Wago 236-106 Wago IRPLLHALO1 IRPLHALO1E No of devices in References circuit 2 C1,2 1 CLF 2 C3 CVCC2,CSD, CVCC1 1 CSNUB 5 D1-4, Not Fitted ...