Electronic Components Datasheet Search |
|
LX1742 Datasheet(PDF) 9 Page - Microsemi Corporation |
|
LX1742 Datasheet(HTML) 9 Page - Microsemi Corporation |
9 / 13 page Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 9 Copyright © 2000 Rev. 1.0b, 2005-03-03 LX1742 High Efficiency High Voltage Boost Controller PRODUCTION DATA SHEET I N T E GRA T ED PR ODUC T S EVALUATI ON BOA RD ( C ONTI N UED) Table 2: Jumper Pin Position Assignments Jumper / Position Function VIN n/a Attach the primary input power form to this contact. Input power may also be applied to the pin marked Vin on J4. VOUT n/a Use this contact to measure the circuit’s output voltage at pin 8. SWITCH n/a Use this contact to observe the switching waveform at the Schottky anode (i.e., LX1742 pin 1). FDBK n/a Use this contact to measure the circuit’s feedback voltage at pin 3. GND / GND2 n/a Use these contact to connect to circuit ground. /SHDN 1 / 0 Inserting a jumper (1) enables the LX1742 by connecting pin 4 directly to VIN. Removing this jumper (0) disables the LX1742 JU3 1 Remove the factory installed jumper and insert a 4 ~6cm wire loop (optional) to observe the inductor current waveform using a current probe. JU1 1 / 0 / 0 Use this position when adjusting the output with an external PWM that has a repetition rate less than 100KHz. Or when using a DC adjustment voltage. JU4 0 / 1 / 0 Use this position when adjusting the output with an external PWM that has a repetition rate in excess of 100KHz. JU5 0 / 0 / 1 Use this position to ground the ADJ (pin 5) when using the LX1742 in a fixed output voltage mode Note: (1) = jumper installed; (0) = jumper not installed. Table 3: Factory Installed Component List for the LX1742 Evaluation Board Ref Part Description C1 CAPACITOR, 4.7µF, 1210, 35V C2 CAPACITOR, 4.7µF, 1210, 35V C3 CAPACITOR, 1000pF, 0805, 35V C4 CAPACITOR, 2.2µF, 0603, 35V C5 & C6 CAPACITOR, (SPARE); see note 1. CR1 Microsemi UPS5819, SCHOTTKY, 1A, 40V, POWERMITE L1 INDUCTOR, 47µH, 480mA, SMT Q1 MMBT3904 TRANSISTOR, NPN, 40V, SOT-23 D1 BZX84C24, ZENER DIODE, TBD R1 RESISTOR, 625K, 1/16W, 0805 R2, R5, R6 RESISTOR, 1.0K, 1/16W, 0805 R3 RESISTOR, 1.0M, 1/16W, 0805 R4 RESISTOR, 72K, 1/16W, 0805 R7 RESISTOR, 100K, 1/16W, 0805 U1 Microsemi LX1742CDU BOOST CONTROLLER; see note 2. Notes 1. Use these locations to insert additional input (C6) and/or output (C5) capacitance. 2. The minimum part set for a working power supply consists of: C1, C2, CR1, L1, R2, R3, R4, U1. |
Similar Part No. - LX1742 |
|
Similar Description - LX1742 |
|
|
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 |