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TOP210G Datasheet(PDF) 7 Page - Power Integrations, Inc. |
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TOP210G Datasheet(HTML) 7 Page - Power Integrations, Inc. |
7 / 16 page A 8/97 TOP209/210 7 Figure 8. Schematic Diagram of a 12 V, 8 W 110/220 VAC Input Power Supply Using the TOP210. The circuit shown in Figure 8 produces a 12 V, 8 W power supply that operates from 85 to 132 VAC or 170 to 264 VAC input voltage. The 12 V output voltage is determined by the TOPSwitch CONTROL pin shunt regulator voltage, the voltage drops of D2 and D3, and the turns ratio between the bias and output windings of T1. Other output voltages are also possible by adjusting the transformer turns ratios. R1 and C5 provide filtering of the bias winding to improve line and load regulation. AC power is rectified and filtered by BR1, C1 and C9 to create the high voltage DC bus applied to the primary winding of T1. The other side of the transformer primary is driven by the integrated high-voltage MOSFET within the TOP210. JP1 is a jumper used to select 110 VAC or 220 VAC operation. Installing JP1 selects 110 VAC operation. Leaving JP1 open selects 220 VAC operation. RA and RB, which equalize voltage across C1 and C9, are necessary only when JP1 is not installed. D1 and VR1 clamp the leading-edge voltage spike caused by transformer leakage inductance to a safe value and reduce ringing. The power secondary winding is rectified and filtered by D2, C2, L1, and C3 to create the 12 V output voltage. R2 provides a pre- load on the 12 V output to improve load regulation at light loads. The bias winding is rectified and filtered by D3, R1, and C5 to create a bias voltage to the TOP210. L2 and Y1-capacitor C7 attenuate common-mode emission currents caused by high- voltage switching waveforms on the DRAIN side of the primary winding and the primary to secondary capacitance. L2 and C6 attenuate differential-mode emission currents caused by the fundamental and harmonics of the trapezoidal primary current waveform. C5 filters internal MOSFET gate drive charge current spikes on the CONTROL pin, determines the auto- restart frequency, and together with R1, compensates the control loop. PI-2046-052397 VR1 BZY97-C200 D1 UF4005 R1 6.8 Ω 3 µH RA 470 k Ω RB 470 k Ω JP1* JUMPER BR1 DFO6M C1 10 µF 200 V R2 330 1W L1 F1 2A T1 T1RD2 1 4 + - 2 3 8 D2 MBR360 5 L2 12 mH min. 0.2A C6 47nF 250VAC X2 C7 1nF 250 VAC Y1 * JPI INSTALLED FOR 110 VAC INPUT JPI OPEN FOR 220 VAC INPUT C5 47 µF 10 V D3 1N4148 C3 120 µF 16 V C2 330 µF 16 V C9 10 µF 200 V 12 V RTN CIRCUIT PERFORMANCE: Line Regulation - –1% (85-132 VAC) or (170-265 VAC) Load Regulation - –5% (10-100%) Ripple Voltage – 50 mV Meets CISPR-22 Class B J1 L N U1 TOP210 D S C CONTROL TOPSwitch |
Similar Part No. - TOP210G |
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Similar Description - TOP210G |
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