Electronic Components Datasheet Search |
|
XRP6840EVB Datasheet(PDF) 6 Page - Exar Corporation |
|
XRP6840EVB Datasheet(HTML) 6 Page - Exar Corporation |
6 / 17 page X XR RP P6 68 84 40 0 4 4..3 3A A S Su up pe errcca ap pa acciitto orr F Flla as sh h L LE ED D D Drriiv ve err w wiitth h II22C C © 2009 Exar Corporation 6/17 Rev. 1.0.0 PIN DESCRIPTION Name Pin Number Description CGND 1 Charge pump ground pin. RDY 2 Active high push-pull output. RDY is high when VOUT reached to 100mV below its VOUT_LIMIT voltage. The VOUT_LIMIT for Flash mode is determined by STATUS2 register [B7 B6 B5]. The VOUT_LIMIT for Torch mode is 4.50V. SCL, SDA 3, 4 The SDA and SCL pins connect to the I2C bus. Multiple functions can be programmed through his interface. They can also be used for read-back. PGND 5, 11 Power ground pin. The Source of internal NMOS is connected to this pin. RESET_N 6 Active Low input pin. If RESET_N = 0, then XRP6840 is in Shut-down mode If RESET_N = 0 and STATUS1 register [B5] = 0, then reset all registers to logic low. If RESET_N = 0 and STATUS1 register [B5] = 1, then all bits of all registers will be saved. LED1, LED2, LED3 (XRP6840A) 7, 8, 9 LED1, LED2, LED3 connect to the drain of the internal NMOS which are current sources for LED current. These current sources are controlled by LEDFLASH or LEDTORCH registers which is programmed through I2C to provide the Torch and Flash current for the LEDs. LED1, LED2, LED3 pins can be connected together to provide higher LED current. If a pin is not used connect it to VOUT. The XRP6840 incorporates a short LED protection circuit which shut-down LED current if LED voltage approaches to VOUT_LIMIT. LED1, NC, LED2 (XRP6840B) 7, 8, 9 FLASH 10 Digital Input pin. Active high. If STATUS1 register [B7 B6] = 11 and FLASH = 1 then LEDs are ON for one Flash timeout duration. Flash Timeout duration is controlled by STATUS1 register [B1 B0]. NC 12 No connection. This pin can be connected to PGND pin for heat sink. GND 13 Ground pin. This ground pin doesn’t carry high internal current. CAP 14 This pin is the output of an internal Op-Amp. This internal Op-Amp is powered by VOUT. The output voltage is half of VOUT, and output resistance is 470Ω. The sink and source current is limited by 470Ω output resistance. This provides active balancing between two internal sections of the super capacitor. VOUT 15 Output voltage. Connect positive terminal of SuperCap here. Connect the LEDs between this pin and the corresponding internal current source. Decouple with 10µF ceramic capacitor close to the pins of the IC. C2P, C2N 16, 17 Connect C2 external flying capacitor between these pins. C1P, C2P 18, 19 Connect C1 external flying capacitor between these pins. VIN 20 Power supply input. Decouple with 10µF ceramic capacitor close to the pins of the IC. Thermal Pad - Connect thermal pad to PGND pins. ORDERING INFORMATION Part Number Junction Temperature Range Marking Package Packing Quantity Note 1 Note 2 XRP6840AILB-F -40°C≤TA≤+125°C 6840AI YYWWX 20-pin TQFN Bulk RoHS Compliant/ Halogen Free 3 Channels XRP6840AILBTR-F -40°C≤TA≤+125°C 6840AI YYWWX 20-pin TQFN 3K/Tape & Reel RoHS Compliant/ Halogen Free 3 Channels XRP6840BILB-F -40°C≤TA≤+125°C 6840BI YYWWX 20-pin TQFN Bulk RoHS Compliant/ Halogen Free 2 Channels XRP6840BILBTR-F -40°C≤TA≤+125°C 6840BI YYWWX 20-pin TQFN 3K/Tape & Reel RoHS Compliant/ Halogen Free 2 Channels XRP6840EVB XRP6840 Evaluation Board – XRP6840A based. “YY” = Year – “WW” = Work Week – “X” = Lot Number |
Similar Part No. - XRP6840EVB |
|
Similar Description - XRP6840EVB |
|
|
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 |