MC33368

http://onsemi.com

2

Figure 1. Representative Block Diagram

This device contains 240 active transistors.

Restart Delay

Output

Overvoltage

Multiplier/

Error

Amplifier

Current

Sense

WatchdogTimer/

Zero Current Detector

FB

Restart Delay

Comp

Mult

LEB

Current Sense

ZC Det

Frequency

Clamp

Internal Bias

Generator

UVLO

S

S

R

Q

PWM

Line

AGND

Gate

PGND

Frequency

Clamp

Rating

Symbol

Value

Unit

Power Supply Voltage (Transient)

20

V

Power Supply Voltage (Operating)

16

V

Line Voltage

500

V

Current Sense, Multiplier, Compensation, Voltage Feedback, Restart Delay and Zero

Current Input Voltage

−1.0 to +10

V

LEB Input, Frequency Clamp Input

−1.0 to +20

V

Zero Current Detect Input

±5.0

mA

Restart Diode Current

5.0

mA

Power Dissipation and Thermal Characteristics

P Suffix, Plastic Package Case 648

1.25

W

Thermal Resistance, Junction−to−Air

100

°C/W

Power Dissipation and Thermal Characteristics

D Suffix, Plastic Package Case 751K

450

mW

Thermal Resistance, Junction−to−Air

178

°C/W

Operating Junction Temperature

150

°C

Operating Ambient Temperature

−25 to +125

°C

Storage Temperature Range

−55 to +150

°C

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit

values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,

damage may occur and reliability may be affected.

NOTE:

ESD data available upon request.