MC44603P ON Semiconductor, MC44603P Datasheet - Page 6

Other Power Management Voltage/Current PWM

MC44603P

Manufacturer Part Number
MC44603P
Description
Other Power Management Voltage/Current PWM
Manufacturer
ON Semiconductor
Type
PWM Mode Controllerr
Datasheet

Specifications of MC44603P

Input Voltage Range
18 V
Mounting Style
Through Hole
Package / Case
PDIP-16
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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ELECTRICAL CHARACTERISTICS
25°C, for min/max values T
SOFT−START SECTION (Note 10)
OVERVOLTAGE SECTION
FOLDBACK SECTION (Note 9)
STANDBY SECTION
CURRENT SENSE SECTION
TOTAL DEVICE
2. Adjust V
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
4. V
5. Standby is disabled for V
6. If not used, Synchronization input must be connected to Ground.
7. Synchronization Pulse Width must be shorter than t
8. This function can be inhibited by connecting Pin 8 to GND. This allows a continuous current mode operation.
9. This function can be inhibited by connecting Pin 5 to V
10. The MC44603A can be shut down by connecting the Soft−Start pin (Pin 11) to Ground.
Duty Cycle (R
Duty Cycle
Protection Threshold Level on V
Propagation Delay (V
Protection Level on V
Input Resistance
Current Sense Voltage Threshold (V
Foldback Input Bias Current (V
Ratio I
Ratio Hysteresis (V
Current Sense Voltage Threshold (V
Maximum Current Sense Input Threshold
Input Bias Current
Propagation Delay (Current Sense Input to Output at V
Power Supply Current
Power Supply Zener Voltage (I
Thermal Shutdown
Standby Operation)
MOS transistor = 3.0 V)
T
T
T
T
T
T
T
T
(V
Startup (V
Operating T
A
A
A
A
A
A
A
A
C
feedback (Pin 14)
= 0° to +70°C
= −25° to +85°C
= 0° to +70°C
= −25° to +85°C
= 0° to +70°C
= −25° to +85°C
= 0° to +70°C
= −25° to +85°C
must be greater than 5.0 V.
R P Stby
CC
(V
CC
soft−start (Pin 11)
/I
soft−start
A
above the startup threshold before setting to 12 V.
ref
= 13 V with V
= −25° to +85°C (Note 2)
h
= 2.3 V and V
Required to Return to Normal Operation from
OVP
CC
= 12 kW)
A
> 2.58 V to V
R P Stby
= −25° to +85°C (Note 3), unless otherwise noted.)
= 0.1 V)
Characteristic
CC
CC
foldback (Pin 5)
OVP
Increasing)
foldback (Pin 6)
= 25 mA)
< 25 mV typical.
foldback (Pin 5)
R P Stby (Pin 12)
out
(continued) (V
Low)
= 0 V)
= 1.2 V)
= 0.9 V)
= 1.0 V)
OSC
TH
CC
CC
http://onsemi.com
of
and V
= 1/f
.
OSC
C
= 12 V, (Note 2), R
.
6
D
V
I
I
R P Stby
soft−start 12k
D
h
foldback−lb
V
Symbol
V
V
V
/V
V
soft−start
CS−Stby
I
OVP−th
CC prot
CS−ib
CS−th
CS−th
I
R P Stby
V
CC
Z
ref
/I
= 10 kW, C
ref
2.42
16.1
15.9
0.86
−6.0
0.37
0.36
1.42
0.28
0.96
18.5
Min
−10
1.0
1.5
1.4
1.4
36
13
T
= 820 pF, for typical values T
0.89
−2.0
0.31
−2.0
Typ
120
155
2.5
2.0
0.4
1.5
1.0
0.3
42
17
17
Max
2.58
17.9
18.1
0.43
0.44
1.58
0.34
1.04
0.45
200
3.0
3.0
3.4
0.9
1.6
49
20
0
A
Unit
=
mA
kW
mA
mA
°C
ms
ns
%
V
V
V
V
V
V

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