Moteur de recherche de fiches techniques de composants électroniques |
|
TC54VN3002EZB713 Fiches technique(PDF) 6 Page - Microchip Technology |
|
TC54VN3002EZB713 Fiches technique(HTML) 6 Page - Microchip Technology |
6 / 20 page TC54 DS21434J-page 6 2001-2011 Microchip Technology Inc. 4.0 APPLICATIONS INFORMATION 4.1 Modifying the Trip Point, VDET – Although the TC54 has a pre-programmed VDET –, it is sometimes necessary to make adjustments during pro- totyping. This can be accomplished by connecting an external resistor divider to a TC54, which has a VDET – lower than that of VSOURCE (Figure 4-1). To maintain detector accuracy, the bleeder current through the divider should be significantly higher than the 1 µA operating current required by the TC54. A rea- sonable value for this bleeder current is 100 µA (100 times the 1 µA required by the TC54). For example, if VDET – = 2V and the desired trip point is 2.5V, the value of R1 + R2 is 25 k (2.5V/100 µA). The value of R1 +R2 can be rounded to the nearest standard value and plugged into the equation of Figure 4-1 to calculate values for R1 and R2. 1% tolerance resistors are recommended. FIGURE 4-1: Modify Trip-Point of the TC54 using External Resistor Divider. 4.2 Other Applications Low operating power and small physical size make the TC54 series ideal for many voltage detector applica- tions, such as those shown in Figures 4-2, 4-3 and 4-4. Figure 4-2 shows a low-voltage gate drive protection circuit that prevents the overheating of the logic-level MOSFET due to insufficient gate voltage. When the input signal is below the threshold of the TC54VN, its output grounds the gate of the MOSFET. Figures 4-3 and 4-4 show the TC54 in conventional voltage monitoring applications. FIGURE 4-2: MOSFET Low Drive Protection. FIGURE 4-3: Battery Voltage Monitor. FIGURE 4-4: Power Good Monitor. Note: In this example, VSOURCE must be greater than (VDET –) V SOURCE R 1 R 1 R 2 + --------------------- V DET - = VIN VOUT VSS R1 VSOURCE R2 Where: VSOURCE = Voltage to be monitored VDET – = Threshold Voltage setting of TC54 TC54 VIN VOUT VSS 270 MTP3055EL VCC RL 4.3V TC54VX VIN VOUT VSS BATLOW + – – TC54VX VIN VOUT VSS Power Good + – Pwr Sply TC54VX |
Numéro de pièce similaire - TC54VN3002EZB713 |
|
Description similaire - TC54VN3002EZB713 |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |