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آی سی سوییچینگ
UCC28084D
Switching Controllers Crnt Mode Push-Pull
کیفیت: ORIGINAL(distributor) پکیج: SOIC-8
قیمت تک فروشی 1,194,144 ریال
قیمت عمده 1,139,280 ریال (10 به بالا)
قیمت ویژه 1,117,334 ریال (100 به بالا)
قیمت فوق العاده1,106,362 ریال (1000 به بالا)
 قیمت تک فروشی 2.052 تتر با تخفیف
10.089.69.419.31
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توضیحات
8 pin current mode push-pull pwm controllers with programmable slope comensation
Description
The UCC38083/4/5/6 is a family of BiCMOS pulse width modulation (PWM) controllers for dc-to-dc or off-line fixed-frequency current-mode switching power supplies. The dual output stages are configured for the push-pull topology. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 110 ns, limiting each output’s duty cycle to less than 50%.
The new UCC3808x family is based on the UCC3808A architecture. The major differences include the addition of a programmable slope compensation ramp to the CS signal and the removal of the error amplifier. The current flowing out of the ISET pin through an external resistor is monitored internally to set the magnitude of the slope compensation function. This device also includes an internal discharge transistor from the CS pin to ground,which is activated at each clock cycle after the pulse is terminated. This discharges any filter capacitance on the CS pin during each cycle and helps minimize filter capacitor values and current sense delay.
The UCC38083 and the UCC38084 devices have a typical soft-start interval time of 3.5 ms while the UCC38085 and the UCC38086 has less than 100 µs for applications where internal soft-start is not desired.
The UCC38083 and the UCC38085 devices have the turn-on/off thresholds of 12.5 V / 8.3 V, while the UCC38084 and the UCC38086 has the turn-on/off thresholds of 4.3 V / 4.1 V. Each device is offered in 8-pin TSSOP (PW), 8-pin SOIC (D) and 8-pin PDIP (P) packages.
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