TEA1761T/N2,118【PDF 5/13 页】IC CTRLR GREENCHIP SYNC 8-SOIC

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录46

1页 2页 3页 4页 [5页]6页 7页 8页 9页

TEA1761T_2

Product data sheet

Rev. 02 25 April 2007

5 of 13

NXP Semiconductors

TEA1761T

GreenChip synchronous rectier controller

7.4 Opto output

The opto output is intended to drive an opto coupler (see

Figure

5). The opto output has

an open-drain output conguration. The maximum sink current is internally limited to 5 mA

(typical). The output is linearly controlled via the V

SENSE

and I

SENSE

input pins. An

over-temperature situation will switch the opto output to its maximum sink current.

During start-up (V

< V

startup

) and undervoltage lock-out the output is disabled.

7.5 Supply management

All (internal) reference voltages are derived from a temperature compensated, on-chip

band gap circuit. The reference voltage is trimmed to an accuracy within 1 %.

7.6 OverTemperature Protection (OTP)

The IC provides an accurate internal overtemperature protection of 150 癈 (typical). The

IC will maximize the current of pin OPTO as soon as the internal temperature limit is

reached. The opto signal can be used on the primary side of the yback controller to

activate the SMPS protection or limit the output power. As soon as the overtemperature

condition is solved, normal operation will resume.

7.7 Driver

The driver circuit to the gate of the external power MOSFET has a source capability of

typically 250 mA and a sink capability of typically 2.7 A. This permits fast turn-on and

turn-off of the power MOSFET for efcient operation. The output voltage of the driver is

limited to 10 V (typical). This high output voltage will drive all MOSFET brands to the

minimum on-state resistance.

During start-up conditions (V

< V

startup

) and undervoltage lock-out the driver output

voltage is actively pulled low.

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式