Electronic Components Datasheet Search |
|
UCC2806J Datasheet(PDF) 6 Page - Texas Instruments |
|
|
UCC2806J Datasheet(HTML) 6 Page - Texas Instruments |
6 / 21 page UCC1806 UCC2806 UCC3806 SLUS272C − FEBRUARY 2000 − REVISED JUNE 2003 6 www.ti.com TERMINAL FUNCTIONS TERMINAL PACKAGES I/O DESCRIPTION NAME D/DW/J/M /N/PW L,Q I/O DESCRIPTION AOUT 11 14 O High-current gate drive for the external MOSFETs BOUT 14 18 O High-current gate drive for the external MOSFETs COMP 7 9 O Output of the error amplifier CS− 3 4 I Inverting input of the 3 ×, differential current sense amplifier CS+ 4 5 I Non-inverting input of the 3 ×, differential current sense amplifier CT 8 10 I Oscillator timing capacitor connection point CURLIM 1 2 I Programs the primary current limit threshold that determins latching or retry after an overcurrent situation GND 12 15 − Reference ground and power ground for all functions of this device INV 6 8 I Inverting input of the error amplifier. NI 5 7 I Non-nverting input of the error amplifier. RT 9 12 I Connection point for the oscillator timing resistor SHUTDOWN 16 20 I Provided for enhanced protection. When SHUTDOWN is driven above 1 V, AOUT and BOUT are forced low. SYNC 10 13 I/O Allows providing external synchronization with TTL compatible thresholds. VC 13 17 I Input supply connection for the FET drive outputs. VIN 15 19 I Input supply connection for this device. VREF 2 3 O Reference output. DETAILED PIN DESCRIPTIONS AOUT and BOUT: AOUT and BOUT provide alternating high current gate drive for the external MOSFETs. Duty cycle can be varied from 0% to 50% where minimum dead time is a function of CT. Both outputs use MOS transistor switches with inherent anti-parallel body diodes to clamp voltage swings to the supply rails, allowing operation without the use of clamp diodes. COMP: COMP is the output of the error amplifier and the input of the PWM comparator. The error amplifier is a low output impedance, 2-MHz operational amplifier which allows sinking or sourcing of current at the COMP pin. The error amplifier is internally current limited, so that zero duty cycle can be commanded by externally forcing COMP to GND. CS−: CS− is the inverting input of the 3 × differential current sense amplifier. CS+: CS+ is the non-inverting input of the 3 × differential current sense amplifier. CT: CT is the oscillator timing capacitor connection point, which is charged by the current set by RT. CT is discharged to GND through a 2.6-mA current sink. This causes a linear discharge of CT to 0 V which then initiates the next switching cycle. Dead time occurs during the discharge of CT, forcing AOUT and BOUT low. Switching frequency (fS) and dead time (tD) are approximated by: f S + 1 2 R T C T ) tD and t D + 961 C T (1) |
Similar Part No. - UCC2806J |
|
Similar Description - UCC2806J |
|
|
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 |