L6732C datasheet(19/32 Pages) STMICROELECTRONICS

tên linh kiện	L6732C

Giải thích chi tiết về linh kiện	Soft-start and inhibit

PDF	32 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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19 / 32 page

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L6732C

5 Device description

19/32

5.12

Minimum on-time (TON, MIN)

The device can manage minimum on-times lower than 100ns. This feature comes down from

the control topology and from the particular over-current-protection system of the L6732C. In

fact, in a voltage mode controller the current has not to be sensed to perform the regulation

and, in the case of L6732C, neither for the over-current protection, given that during the off-time

the valley-current-protection can operate in every case. The first advantage related to this

feature is the possibility to realize extremely low conversion ratios. Figure 12. shows a

conversion from 14V to 0.3V at 500KHz with a TON of about 50ns.

The on-time is limited by the turn-on and turn-off times of the MOSFETs.

Figure 12. 14V -> 0.3V@500KHz, 5A

50ns

VPHASE

VOUT

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L6732C bảng dữ liệu(PDF) 19 Page - STMicroelectronics