VIPER53SPTR-E datasheet(30/36 Pages) STMICROELECTRONICS

Part #	VIPER53SPTR-E

Description	OFF-line primary switch

PDF	36 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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30 / 36 page

Special recommendations

VIPer53 - E

30/36

Special recommendations

As steted in the error amplifier section, a capacitor of 10nF capacitor (minimum value: 8nF)

should always be connected to the COMP pin to ensure correct stability of the internal error

amplifier Figure 18, 19 and 22.

In order to improve the ruggedness of the device versus eventual drain overvoltages, a

resistance of 1k

Ω should be inserted in series with the TOVL pin, as shown on Figure 18,

Figure 19 on page 17.

Note that, this resistance does not impact the overload delay, as its value is negligible prior

to the internal pull-up resistance (about 125k

Ω).

Software implementation

All the above considerations and some others are included included in ST design software

which provides all of the needed components around the VIPer device for specified output

configurations, and is available on www.st.com.

VIPER53SPTR-E Datasheet(PDF) 30 Page - STMicroelectronics