UC3842B(2013) Просмотр технического описания (PDF) - ON Semiconductor

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Компоненты Описание

производитель

UC3842B
(Rev.:2013)

High Performance Current Mode Controllers

ON Semiconductor 

UC3842B, UC3843B, UC2842B, UC2843B

From VO

Ri

Rd

Cf

2.5V

2(3)

+

1.0mA 2R

EA

R

Rf

1(1)

Rf ≥ 8.8 k

5(9)

Error Amp compensation circuit for stabilizing any current mode topology except for boost and flyback

converters operating with continuous inductor current.

From VO

Rp

Ri

2.5V

2(3)

+

1.0mA 2R

Cp

Rd

Cf

Rf

EA

R

1(1)

5(9)

Error Amp compensation circuit for stabilizing current mode boost and flyback

topologies operating with continuous inductor current.

Figure 33. Error Amplifier Compensation

VCC

Vin

7(12)

MPS3904

8(14)

RT

R

Bias

R

5.0V Ref

+

-

36V

+

-

7(11)

From VO

RSlope

Ri

CT 4(7)

2(3)

Rd

Cf

Rf

Osc

+

-m

1.0mA 2R

S

Q

R

EA

R 1.0V Comp/Latch

6(10)

5(8)

1(1)

- 3.0m

m

3(5)

RS

5(9)

The buffered oscillator ramp can be resistively summed with either the voltage

feedback or current sense inputs to provide slope compensation.

Figure 34. Slope Compensation

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