 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ICE2QR2280Z-1 Datasheet(PDF) 11 Page - Infineon Technologies AG |
|
||||||||||||||||||||||||||||||
ICE2QR2280Z-1 Datasheet(HTML) 11 Page - Infineon Technologies AG |
|
|
11 / 21 page  CoolSET® - Q1 ICE2QR2280Z-1 Functional Description Version 2.1 11 March 7, 2013 immediately after leaving Active Burst Mode. This is helpful to decrease the output voltage undershoot. Figure 8 Signals in Active Burst Mode 3.6 Protection Functions The IC provides full protection functions. The following table summarizes these protection functions. Table 2 Protection features During operation, the VCC voltage is continuously monitored. In case of an under-voltage or an over- voltage, the IC is reset and the main power switch is then kept off. After the VCC voltage falls below the threshold VVCCoff, the startup cell is activated. The VCC capacitor is then charged up. Once the voltage exceeds the threshold VVCCon, the IC begins to operate with a new soft-start. In case of open control loop or output over load, the feedback voltage will be pulled up. After a blanking time of tOLP_B (30ms), the IC enters auto-restart mode. The blanking time here enables the converter to provide a peak power in case the increase in VFB is due to a sudden load increase. This output over load protection is disabled during burst mode. During off-time of the power switch, the voltage at the zero-crossing pin is monitored for output over-voltage detection. If the voltage is higher than the preset threshold vZCOVP, the IC is latched off after the preset blanking time tZCOVP. This latch off mode can only be reset if the Vcc < VVCCPD (5.2V). If the junction temperature of IC exceeds TjCon (140 °C), the IC enters into OTP auto restart mode. This OTP is disabled during burst mode. If the voltage at the current sensing pin is higher than the preset threshold vCSSW during on-time of the power switch, the IC is latched off. This is short-winding protection. The short winding protection is disabled during burst mode. During latch-off protection mode, the VCC voltage drops to vVCCoff (9.85V) and then the startup cell is activated. The VCC voltage is then charged to vVCCon (18V). The startup cell is shut down again. This action repeats again and again. There is also a maximum on time limitation implemented inside the CoolSET® - Q1. Once the gate voltage is high and longer than tOnMAx, the switch is turned off immediately. VCC Overvoltage Auto Restart Mode VCC Undervoltage Auto Restart Mode Overload/Open Loop Auto Restart Mode Over temperature Auto Restart Mode Output Overvoltage Latched Off Mode Short Winding Latched Off Mode VFBEB VFBBOn VFBLB V FB t VCSB 1.0V VCS VVCCoff V VCC t t VO t VFBBOff Max. Ripple < 1% Time to 7th zero and Blanking Window (tBEB) Current limit level during Active Burst Mode Leaving Active Burst Mode Entering Active Burst Mode |
Similar Part No. - ICE2QR2280Z-1 |
|
Similar Description - ICE2QR2280Z-1 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
