Electronic Components Datasheet Search |
|
DRV601 Datasheet(PDF) 9 Page - Texas Instruments |
|
DRV601 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 16 page Charge Pump Flying Capacitor and PVSS Capacitor Decoupling Capacitors Gain setting resistors ranges Input-Blocking Capacitors fc IN + 1 2p R IN CIN C IN + 1 2p fc IN RIN or (3) Supply Voltage Limiting At 4.5 V Capacitive load DRV601 www.ti.com ................................................................................................................................................ SLOS553A – JANUARY 2008 – REVISED AUGUST 2008 The charge pump flying capacitor serves to transfer charge during the generation of the negative supply voltage. The PVSS capacitor must be at least equal to the charge pump capacitor in order to allow maximum charge transfer. Low ESR capacitors are an ideal selection, and a value of 1µF is typical. Capacitor values that are smaller than 1µF can be used, but the maximum output voltage may be reduced and the device may not operate to specifications. The DRV601 is a DirectPath™ Line Driver amplifier that require adequate power supply decoupling to ensure that the noise and total harmonic distortion (THD) are low. A good low equivalent-series-resistance (ESR) ceramic capacitor, typically 2.2µF, placed as close as possible to the device VDD lead works best. Placing this decoupling capacitor close to the DRV601 is important for the performance of the amplifier. For filtering lower frequency noise signals, a 10-µF or greater capacitor placed near the audio power amplifier would also help, but it is not required in most applications because of the high PSRR of this device. The gain setting resistors, Rin and Rfb, must be chosen so that noise, stability and input capacitor size of the DRV601 is kept within acceptable limits. Voltage gain is defined as Rfb divided by Rin. Selecting values that are too low demands a large input ac-coupling capacitor, CIN . Selecting values that are too high increases the noise of the amplifier. Table 1 lists the recommended resistor values for different gain settings. Table 1. Recommended Resistor Values Gain Input Resistor Value, Rin Feedback Resistor Value, Rfb -1 V/V 10 k Ω 10 k Ω -1.5 V/V 10 k Ω 15 k Ω -2 V/V 10 k Ω 20 k Ω -10 V/V 4,7 k Ω 47 k Ω DC input-blocking capacitors are required to be added in series with the audio signal into the input pins of the DRV601. These capacitors block the DC portion of the audio source and allow the DRV601 inputs to be properly biased to provide maximum performance. These capacitors form a high-pass filter with the input resistor, Rin. The cutoff frequency is calculated using Equation 3. For this calculation, the capacitance used is the input-blocking capacitor and the resistance is the input resistor chosen from the gain table above, then the frequency and/or capacitance can be determined when one of the two values are given. The DRV601 have a built-in charge pump which serves to generate a negative rail for the line driver. Because the line driver operates from a positive voltage and negative voltage supply, circuitry has been implemented to protect the devices in the amplifier from an overvoltage condition. Once the supply is above 4.5 V, the DRV601 can shut down in an overvoltage protection mode to prevent damage to the device. The DRV601 resume normal operation once the supply is reduced to 4.5 V or lower. The DRV601 has the ability to drive a high capacitive load up to 330pF directly, higher capacitive loads can be accepted by adding a series resistor of 10 Ω or larger. The figure below shows a 10kHz signal into a 470pF capacitor using the 10R series resistor. Copyright © 2008, Texas Instruments Incorporated 9 Product Folder Link(s): DRV601 |
Similar Part No. - DRV601_08 |
|
Similar Description - DRV601_08 |
|
|
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 |