 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ICE3RBR1765JZ Datasheet(PDF) 8 Page - Infineon Technologies AG |
|
||||||||||||||||||||||||||||||
ICE3RBR1765JZ Datasheet(HTML) 8 Page - Infineon Technologies AG |
|
|
8 / 31 page  Version 2.0 8 7 Jun 2013 ICE3RBR1765JZ Functional Description 3 Functional Description All values which are used in the functional description are typical values. For calculating the worst cases the min/max values which can be found in section 4 Electrical Characteristics have to be considered. 3.1 Introduction ICE3RBR1765JZ (ICE3RBRxx65JZ series) is derived from ICE3BRxx65J in DIP-7 package. It has more robust design and can work to -40°C. A high voltage Startup Cell is integrated into the IC which is switched off once the Undervoltage Lockout on-threshold of 18V is exceeded. This Startup Cell is part of the integrated CoolMOS ®. The external startup resistor is no longer necessary as this Startup Cell is connected to the Drain. Power losses are therefore reduced. This increases the efficiency under light load conditions drastically. The particular features are the active burst mode, propagation delay compensation, modulated gate driving, auto-restart protection for Vcc overvoltage, over temperature, over load, open loop, built-in soft start, blanking window and frequency jitter. It provides the flexibility to increase the blanking window by simply addition of a capacitor in BA pin. In order to further increase the flexibility of the protection feature, an external auto-restart enable features are added. The intelligent Active Burst Mode can effectively obtain the lowest Standby Power at light load and no load conditions. After entering the burst mode, there is still a full control of the power conversion to the output through the optocoupler, that is used for the normal PWM control. The response on load jumps is optimized and the voltage ripple on V out is minimized. The Vout is on well controlled in this mode. The usually external connected RC-filter in the feedback line after the optocoupler is integrated in the IC to reduce the external part count. Adopting the BiCMOS technology, it can increase the design flexibility as the Vcc voltage range is increased to 25V. It has a built-in 20ms soft start function. There are 2 modes of blanking time for high load jumps; the basic mode and the extendable mode. The blanking time for the basic mode is set at 20ms while the extendable mode will increase the blanking time by adding an external capacitor at the BA pin in addition to the basic mode blanking time. During this blanking time window the system can give the maximum power to the loading. In order to increase the robustness and safety of the system, the IC provides Auto Restart protection. The Auto Restart Mode reduces the average power conversion to a minimum level under unsafe operating conditions. This is necessary for a prolonged fault condition which could otherwise lead to a destruction of the SMPS over time. Once the malfunction is removed, normal operation is automatically retained after the next Start Up Phase. To make the protection more flexible, an external auto-restart enable pin is provided. When the pin is triggered, the switching pulse at gate will stop and the IC enters the auto-restart mode after the pre-defined spike blanking time. The internal precise peak current control reduces the costs for the transformer and the secondary diode. The influence of the change in the input voltage on the maximum power limitation can be avoided together with the integrated Propagation Delay Compensation. Therefore the maximum power is nearly independent on the input voltage, which is required for wide range SMPS. Thus there is no need for the over-sizing of the SMPS, e.g. the transformer and the output diode. Furthermore, it implements the frequency jitter mode to the switching clock such that the EMI noise will be effectively reduced. 3.2 Power Management Figure 3 Power Management The Undervoltage Lockout monitors the external supply voltage V VCC. When the SMPS is plugged to the main line the internal Startup Cell is biased and starts to charge the external capacitor C VCC which is connected to the VCC pin. This VCC charge current is Internal Bias Voltage Reference Power Management 5.0V Undervoltage Lockout 18V 10.5V Power-Down Reset Active Burst Mode Auto Restart Mode Startup Cell VCC Drain CoolMOS ® Soft Start block |
Similar Part No. - ICE3RBR1765JZ |
|
Similar Description - ICE3RBR1765JZ |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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
