DAP011 데이터 시트보기 (PDF) - ON Semiconductor

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DAP011

PWM Current−Mode Controller for High−Power Universal Off−Line Supplies

ON Semiconductor 

HV−Bulk

OVP

+

DAP011/DAP011C

DAP011/DAP011C

1

14

*See

Note

2

13

3

12

4

11 5 V Ref.

5

10

6

9

7

8

+

Vout

Gnd

Skip

Freq.

Adj.

Jitter

Ramp

+

Gnd

Timer

Delay

*This resistor prevents from negatively biasing the HV pin (14) at power−off. Typical value is 4.7 kW.

Figure 1. Typical Application Example

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1

NC

−

−

2

Latch

Input voltage to latch comparator

By bringing this pin above 3.0 V, e.g. via a Zener or an NTC, the circuit

permanently latches−off.

3

CTimer

Timer/soft−start delay

Wiring a capacitor to ground helps selecting the timer duration. 10% of

this duration fixes the soft−start period.

4

Jitter

Frequency jittering speed

This pin offers a way to adjust the frequency modulation pace.

5

Skip

Skip cycle adjustment

By connecting a resistor to ground, it becomes possible to alter the

default skip cycle level.

6

FB

Feedback pin

Hooking an optocoupler collector to this pin will allow regulation.

7

CS

Current sense + ramp

compensation

This pin monitors the primary peak current but also offers a mean to

introduce ramp compensation.

8

GND

−

The controller ground.

9

DRV

Driver output

The driver’s output to an external MOSFET.

10

VCC

Supplies the controller

This pin is connected to an external auxiliary voltage.

11

Ref.

Reference voltage

This pin delivers 5.0 V and sources up to 5.0 mA.

12

NC

−

Non−connected for improved creepage.

13

NC

−

Non−connected for improved creepage.

14

HV

High−voltage input

Connected to the bulk capacitor, this pin powers the internal current

source to deliver a startup current.

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