NCP1239(2005) 查看數據表（PDF） - ON Semiconductor

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NCP1239
(Rev.:2005)

Low−Standby High Performance PWM Controller

ON Semiconductor 

Vbulk

OVP REF5V

Rbo1

to PFC_VCC

NTC REF5V (5V/10mA)

Thermistor

+

Cbulk

BO

Rbo2

Rt

Cbo

Css

NCP1239

1

16

2

15

3

14

4

13

5

12

6

11

7

10

8

9

NCP1239F

VCC

Rramp

Rcomp

+

+

Vout

GND

Vbulk

Figure 1. NCP1239F Typical Application Example

Rbo1

to PFC_VCC

OVP REF5V

NTC REF5V (5V/10mA)

Thermistor

+

Cbulk

BO

Rbo2

Rt

Cbo

Css

1

16

2

15

3

14

4

13

5

12

6

11

7

10

8

9

NCP1239V

VCC

Rramp

Rdmax

+

GND

D3

L2

D4

+ Vout

GND

Figure 2. NCP1239V Typical Application Example

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2

GND

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