MC44608
+
−
+
−
+
−
DMG
Demag
Logic
Output
Start−up
Phase
Switching
Phase
Latched off
Phase
1 V
4 kHz Filter
Regulation
Block
Switching Phase
S2
S3
&
Latched off Phase
Stand−by
Thermal
DMG
OUT Disable
OVP
UVLO1
Switching Phase
Start−up Phase
Latched off Phase
UVLO2
9 mA
Start−up
CC
Buffer
PWM
Q
R
S
&
&
PWM
VPWM
&
OSC
OSC
Clock
Stand−by
Leading Edge
S1
1
0
&
Stand−by
1
8
6
5
4
3
2
Demag
Vi
Isense
Control
GND
Driver
V
Input
CC
Shutdown
Latch
UVLO2
Management
V
&
Source
Management
Enable
Blanking
Output
CS
2 S
>120 A
>24 A
50 mV
/20 mV
NOC
OC
200 A
Start−up
Phase
Figure 1. Representative Block Diagram
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Total Power Supply Current
I
CC
30
mA
Output Supply Voltage with Respect to Ground
V
CC
16
V
All Inputs except Vi
V
inputs
−1.0 to +16
V
Line Voltage Absolute Rating
V
i
500
V
Recommended Line Voltage Operating Condition
V
i
400
V
Power Dissipation and Thermal Characteristics
Maximum Power Dissipation at T
A
= 85
°
C
P
D
600
mW
Thermal Resistance, Junction−to−Air
R
JA
100
°
C/W
Operating Junction Temperature
T
J
150
°
C
Operating Ambient Temperature
T
A
−25 to +85
°
C
