AN2811 datasheet(16/25 Pages) STMICROELECTRONICS

No de pièce	AN2811

Description	High brightness LEDs are becoming a prominent source of lighting

PDF	25 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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16 / 25 page

Test results and waveforms

AN2811

16/25

Doc ID 14904 Rev 1

The VIPer17 integrates one 800 V MOSFET and the drain current is limited at 0.6 A. The

drain-source voltage and drain current waveforms are shown in Figure 18 through 21. In

Figure 18 and Figure 19 the waveform is captured at 176 VAC. In Figure 20 and Figure 21

the waveform is captured at 264 VAC. The peak drain voltage, 496 V, is obtained at 264 V

load with two LEDs (see Figure 21). Under the same condition, the peak drain current is

384 mA.

Figure 18.

Vds and Id at 176 VAC, one LED

Figure 19.

Vds and Id at 176 VAC, two LEDs

Top trace: Vin (200 V/div)

Bottom trace: Iin (200 mA/div)

Time: 4 us/div

Top trace: Vin (200 V/div)

Bottom trace: Iin (200 mA/div)

Time: 4 us/div

Figure 20.

Vds and Id at 264 VAC, one LED

Figure 21.

Vds and Id at 264 VAC, two LEDs

Top trace: Vds (200 V/div)

Bottom trace: Id (200 mA/div)

Time: 4 us/div

Top trace: Vin (200 V/div)

Bottom trace: Iin (200 mA/div)

Time: 4 us/div

AN2811 Fiches technique(PDF) 16 Page - STMicroelectronics