 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
SDA 数据表(PDF) 21 Page - Exar Corporation |
|
|
|||||||||||||||||||||||||||||
SDA 数据表(HTML) 21 Page - Exar Corporation |
|
|
21 / 29 page  X XR RP P7 77 72 24 4 Q Qu ua ad d C Ch ha an nn ne ell D Diig giitta all P PW WM M/ /P PF FM M P Prro og grra am mm ma ab blle e P Po ow we err M Ma an na ag ge em me en ntt S Sy ys stte em m © 2012 Exar Corporation 21/29 Rev. 1.0.1 specified way if the current level surpasses threshold level. Start-up Time-out Fault monitors if a channel gets into regulation in a user defined time period LDO5 Over Current Protection (LDO5 OCP) monitor current drawn from the regulator and will cause the controller to be reset if the current exceeds LDO5 limit (155mA typical) LDO3.3 Over Current Protection (LDO3.3 OCP) monitors current drawn from the regulator and will cause the controller to shut down the regulator if the current exceeds LDO3.3 current limit (65mA typical) UVLO Both UVLO warning and fault levels are user programmable and set at 200mV increments in PA5. When the warning level is reached the controller will generate the UVLO_WARNING_EVENT interrupt. In addition, the host can be informed about the event through HW Flags on GPIO0 (see the Digital I/O section). When an under voltage fault condition occurs, the XRP7724 outputs are shutdown and the UVLO_FAULT_ACTIVE_EVENT interrupt is generated. In addition, the host can be informed by forwarding the Low Vcc signal to any GPIO/PSIO (see the Digital I/O section). This signal transitions when the UVLO fault occurs. When coming out of the fault, rising Vcc crossing the UVLO fault level will trigger the UVLO_FAULT_INACTIVE_EVENT interrupt. Once UVLO condition clears (Vcc voltage rises Above or TO the user defined UVLO warning level), the Low Vcc signal will transition and the controller will be reset. A special attention needs to be paid in the case when Vcc = LDO5 = 4.75V to 5.5V. Since the input voltage ADC resolution is 200mV, the UVLO warning and fault set points are coarse for a 5V input. Therefore, setting the warning level at 4.8V and the fault level at 4.6V may result in the outputs not re- enable until a full 5.0V is reached on Vcc. Setting the warning level to 4.6v and the fault level at 4.4V would likely make UVLO handing as desired, however, below 4.6V the device has a hardware UVLO on LDO5 to ensure proper shutdown of the internal circuitry of the controller. This means the 4.4V UVLO fault level will never occur. A special test has been added to ensure that if UVLO FAULT will OTP User defined OTP warning, fault and restart levels are set at 5°C increments in PA5. When the warning level is reached the controller will generate the TEMP_WARNING_EVENT interrupt. In addition, the host can be informed about the event through HW Flags on GPIO0 (see the Digital I/O section). When an OTP fault condition occurs, the XRP7724 outputs are shutdown and the TEMP_OVER_EVENT interrupt is generated. Once temperature reaches a user defined OTP Restart Threshold level, the TEMP_UNDER_EVENT interrupt will be generated and the controller will reset. OVP A user defined OVP fault level is set in PA5 and is expressed in percentages of a regulated target voltage. Resolution is the same as for the target voltage (expressed in percentages). The OVP minimum and maximum values are calculated by the following equation where the range for N is 1 to 63: When the OVP level is reached and the fault is generated, the host will be notified by the |
|
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
