DDA010 datasheet(5/21 Pages) INFINEON

5 / 21 page

Version 2.3

April 27, 2010

CoolSET

® - Q1

ICE2QR0665

Pin Configuration and Functionality

1.1

Pin Configuration with PG-DIP-8-6

1.2

Package PG-DIP-8-6

Figure 1

Pin Configuration PG-DIP-8-6 (top view)

Note: Pin 4 and 5 are shorted

1.3

Pin Functionality

ZC (Zero Crossing)

At this pin, the voltage from the auxiliary winding after

a time delay circuit is applied. Internally, this pin is

connected to the zero-crossing detector for switch-on

determination. Additionally, the output overvoltage

detection is realized by comparing the voltage Vzc with

an internal preset threshold.

FB (Feedback)

Normally, an external capacitor is connected to this pin

for a smooth voltage V

FB.

Internally, this pin is

connected to the PWM signal generator for switch-off

determination (together with the current sensing

signal), the digital signal processing for the frequency

reduction

with

decreasing

load

during

normal

operation, and the Active Burst Mode controller for

entering Active Burst Mode operation determination

and burst ratio control during Active Burst Mode

operation. Additionally, the open-loop / over-load

protection is implemented by monitoring the voltage at

this pin.

CS (Current Sense)

This pin is connected to the shunt resistor for the

primary current sensing, externally, and the PWM

signal generator for switch-off determination (together

with the feedback voltage), internally. Moreover, short-

winding protection is realised by monitoring the voltage

cs during on-time of the main power switch.

Drain (Drain of integrated Depl. CoolMOS

®)

Drain pin is the connection to the drain of the internal

Depl. CoolMOS

®.

VCC (Power supply)

VCC pin is the positive supply of the IC. The operating

range is between V

VCCoff and VVCCOVP.

GND (Ground)

This is the common ground of the controller.

Symbol

Function

Zero Crossing

Feedback

Current Sense/

650V

1) Depl. CoolMOS® Source

at T

j=110°C

4, 5

Drain

650V

1) Depl. CoolMOS® Drain

n.c.

Not connected

VCC

Controller Supply Voltage

GND

Controller Ground

GND

VCC

n.c.

Drain

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