Electronic Components Datasheet Search |
|
BD7682FJ-LB Datasheet(PDF) 7 Page - Rohm |
|
BD7682FJ-LB Datasheet(HTML) 7 Page - Rohm |
7 / 30 page 7/27 Datasheet Datasheet BD768xFJ-LB Series TSZ02201-0F1F0A200050-1-2 17.Apr.2015. Rev.001 © 2015 ROHM Co., Ltd. All rights reserved. www.rohm.com TSZ22111・15・001 (3) VCC Pin Protection Function BD768xFJ includes the VCC low voltage protection function VCC UVLO (Under Voltage Protection) and the VCC over voltage protection function VCC OVP (Over Voltage Protection). These functions prevent abnormal voltage-related damage in MOSFETs used for switching. The VCC UVLO function uses an auto recovery type comparator with voltage hysteresis and the VCC OVP function uses latch mode or auto recovery. After latch function is detected by VCCOVP, latching is released (reset) when the condition VCC< VLATCH (typ= VUVLO2 -3.5V) is met. This operation is shown in Figure 3. VCCOVP has a built-in mask time TLATCH (typ = 150 µs). This function masks any surges, etc., that occur at the pin. 18.5Vtyp VCC OFF Time ON OFF ON 29.5Vtyp OUT Switching 14.0Vtyp VCC UVLO ON OFF ON OFF VCC OVP OFF ON OFF A BC D E F OFF Internal Latch Signal L : Normal H : Latch VH G HI J K L M Vlatch= VCCuvlo2- 3.5Vtyp N A Time Figure 3. VCC UVLO / OVP (Latch Mode) A: VH is applied, VCC voltage rises B: When VCC > VUVLO1, DC/DC operation starts. C: When VCC < VUVLO2, DC/DC operation stops. D: When VCC > VUVLO1, DC/DC operation starts. E: VCC voltage drops until DC/DC operation starts. F: VCC rises. F: When VCC > VOVP1, DC/DC operation stops (latch mode). Switching is stopped by an internal latch signal. G: When DC/DC operation stops, power supply from the auxiliary coil stops and VCC voltage drops. H: When VCC < VUVLO2, VCC voltage rises because IC current consumption drops. I: When VCC > VUVLO1, latching occurs and so there are no DC/DC operations. VCC voltage drops because IC current consumption is lowered. K: Same as H L: Same as I M: VH is OPEN (unplugged). VCC drops. N: When VCC < VLATCH, latch is released. |
Similar Part No. - BD7682FJ-LB |
|
Similar Description - BD7682FJ-LB |
|
|
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 |