Electronic Components Datasheet Search |
|
UCC28050 Datasheet(PDF) 7 Page - Texas Instruments |
|
UCC28050 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 32 page UCC28050, UCC28051 UCC38050, UCC38051 SLUS515F−SEPTEMBER 2002 − REVISED MARCH 2009 7 www.ti.com V CS ^ 0.67 (COMP * 2.5 V) MULTIN ) VOFFSET VOFFSET is approximately 75 mV to improve the zero crossing distortion. ZCD (Pin 5): This pin is the input for the zero current detect comparator. The boost inductor current is indirectly sensed through the bias winding on the boost inductor. The ZCD pin input goes low when the inductor current reaches zero and that transition is detected. Internal active voltage clamps are provided to prevent this pin from going below ground or too high. If zero current is not detected within 400 μs, a reset timer sets the latch and gate drive. GND (Pin 6): The chip reference ground. All bypassing elements are connected to ground pin with shortest loops feasible. DRV (Pin 7): The gate drive output for an external boost switch. This output is capable of delivering up to 750-mA peak currents during turn-on and turn-off. An external gate drive resistor may be needed to limit the peak current depending on the VCC voltage being used. Below the UVLO threshold, the output is held low. VCC (Pin 8): The supply voltage for the chip. This pin should be bypassed with a high-frequency capacitor (greater than 0.1- μF) and tied to GND. The UCC38050 has a wide UVLO hysteresis of approximately 6.3 V that allows use of lower value supply capacitor on this pin for quicker and easier start-up. The UCC38051 has a narrow UVLO hysteresis with of about 2.8 V and a start-up voltage of about 12.5 V for applications where the operation of the PFC device needs to be controlled by a downstream PWM controller. |
Similar Part No. - UCC28050_13 |
|
Similar Description - UCC28050_13 |
|
|
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 |