MC44603P ON Semiconductor, MC44603P Datasheet

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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0
MC44603A
Enhanced Mixed Frequency
Mode GreenLinet PWM
Controller:
Fixed Frequency, Variable Frequency,
Standby Mode
specifically designed for off−line and dc−to−dc converter applications.
This device has the unique ability of automatically changing operating
modes if the converter output is overloaded, unloaded, or shorted,
offering the designer additional protection for increased system
reliability. The MC44603A has several distinguishing features when
compared to conventional SMPS controllers. These features consist of
a foldback facility for overload protection, a standby mode when the
converter output is slightly loaded, a demagnetization detection for
reduced switching stresses on transistor and diodes, and a high current
totem pole output ideally suited for driving a power MOSFET. It can
also be used for driving a bipolar transistor in low power converters
(< 150 W). It is optimized to operate in discontinuous mode but can
also operate in continuous mode. Its advanced design allows use in
current mode or voltage mode control applications.
Features
Current or Voltage Mode Controller
High Flexibility
Safety/Protection Features
GreenLine Controller: Low Power Consumption in Standby Mode
© Semiconductor Components Industries, LLC, 2011
April, 2011 − Rev. 5
The MC44603A is an enhanced high performance controller that is
Overvoltage Protection Against Open Current and Open Voltage Loop
This is a Pb−Free and Halide−Free Device
Operation up to 250 kHz Output Switching Frequency
Inherent Feed Forward Compensation
Latching PWM for Cycle−by−Cycle Current Limiting
Oscillator with Precise Frequency Control
Externally Programmable Reference Current
Secondary or Primary Sensing7
Synchronization Facility
High Current Totem Pole Output
Undervoltage Lockout with Hysteresis
Protection Against Short Circuit on Oscillator Pin
Fully Programmable Foldback
Soft−Start Feature
Accurate Maximum Duty Cycle Setting
Demagnetization (Zero Current Detection) Protection
Internally Trimmed Reference
Enhanced Output Drive
Low Startup and Operating Current
Fully Programmable Standby Mode
Controlled Frequency Reduction in Standby Mode
1
See detailed ordering and shipping information in the package
dimensions section on page 23 of this data sheet.
Current Sense Input
16
16
Demag Detection
Protection (OVP)
Foldback Input
1
Overvoltage
ORDERING INFORMATION
A
WL
YY
WW
G
1
Output
GND
V
V
CC
PIN CONNECTIONS
C
http://onsemi.com
DW SUFFIX
CASE 751G
CASE 648
P SUFFIX
SOIC−16
PDIP−16
1
2
3
4
5
6
7
8
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Top View)
Publication Order Number:
16
1
16
1
16
15
14
13
12
10
11
9
AWLYYWWG
MC44603AP
MC44603ADW
DIAGRAMS
AWLYYWWG
R
R
Standby
Voltage Feedback
Input
Error Amp Output
R
Soft-Start/D
Voltage Mode
C
Sync Input
MARKING
ref
Frequency
Power Standby
T
MC44603A/D
max
/

Related parts for MC44603P

MC44603P Summary of contents

Page 1

MC44603A Enhanced Mixed Frequency Mode GreenLinet PWM Controller: Fixed Frequency, Variable Frequency, Standby Mode The MC44603A is an enhanced high performance controller that is specifically designed for off−line and dc−to−dc converter applications. This device has the unique ability of automatically ...

Page 2

... Low dV/dT for Low EMI Radiations *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. http://onsemi.com 2 ...

Page 3

MAXIMUM RATINGS Rating Total Power Supply and Zener Current Supply Voltage with Respect to Ground (Pin 4) Output Current (Note 1) Source Sink Output Energy (Capacitive Load per Cycle Soft−Start Inputs F Stby ...

Page 4

ELECTRICAL CHARACTERISTICS 25°C, for min/max values T = −25° to +85°C (Note 3), unless otherwise noted.) A Characteristic OUTPUT SECTION Output Voltage (Note 4) Low State (I = 100 mA) Sink Low State (I = 500 mA) Sink High State ...

Page 5

ELECTRICAL CHARACTERISTICS (continued) (V 25°C, for min/max values T = −25° to +85°C (Note 3), unless otherwise noted.) A Characteristic OSCILLATOR AND SYNCHRONIZATION SECTION Oscillator Voltage Swing (Peak−to−Peak) Ratio Charge Current/Reference Current T = 0° to +70° 2.0 ...

Page 6

ELECTRICAL CHARACTERISTICS (continued) (V 25°C, for min/max values T = −25° to +85°C (Note 3), unless otherwise noted.) A Characteristic SOFT−START SECTION (Note 10) Duty Cycle ( kW) soft−start Duty Cycle (V = 0.1 V) soft−start (Pin 11) ...

Page 7

Negative R Q Active S Clamp Demag Detect 3.7 V Sync Input V 9 ref + 0.4 I 0.7 V ref 1 3.6 V ...

Page 8

C = 100 500 1000 2200 100 Oscillator Frequency (Hz) OSC Figure 2. Timing Resistor versus Oscillator Frequency ...

Page 9

T , AMBIENT TEMPERATURE (°C) A Figure 8. Oscillator Discharge Current versus Temperature 2.0 Sink Saturation (Load 1.6 CC 1.2 0 ...

Page 10

T , AMBIENT TEMPERATURE (°C) A Figure 14. Current Sense Gain versus Temperature 140 120 100 80 -50 - AMBIENT TEMPERATURE (°C) A Figure 16. ...

Page 11

T , AMBIENT TEMPERATURE (°C) A Figure 20. Startup Threshold Voltage versus Temperature 8.0 7.8 7.6 7.4 7.2 7.0 6.8 -50 - AMBIENT TEMPERATURE (°C) A ...

Page 12

T , AMBIENT TEMPERATURE (°C) A Figure 26. Standby Reference Current versus Temperature PIN FUNCTION DESCRIPTION Pin Name 1 V This pin is the positive supply of ...

Page 13

No-Take Over Startup Restart prot V stup-th V disable1 V disable2 V ref UVLO1 V Pin 11 (Soft-Start) V OVP Out Output Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï ...

Page 14

stup-th V disable1 V disable2 V ref UVLO1 V Pin 11 (Soft-Start) Output (Pin 0.3 mA Figure 30. Switching Off Behavior Stby V Demag Out V OSC ...

Page 15

V ref V + 1.6 V CSS V 3 low 1 OSC Output (Pin 3) Error Amplifier A fully compensated Error Amplifier with access to the inverting input and output is provided. It features ...

Page 16

Thus, the error signal controls the peak inductor current on a cycle−by−cycle basis. The Current Sense Comparator PWM Latch ensures that only a single pulse appears at the Source Output during the appropriate oscillator cycle. The inductor current ...

Page 17

Consequently charge T charge DV/I discharge T discharge where the oscillator charge time charge DV is the oscillator peak−to−peak value I is the oscillator charge current charge and T ...

Page 18

ICL + AC Line R startup V CC MC44603A Figure 40. Power Losses in a Classical Flyback Structure In a classical flyback (as depicted in Figure 40), the standby losses mainly consist of the energy waste due ...

Page 19

In order to prevent undesired mode switching when power is close to the threshold value, a hysteresis that is proportional incorporated creating a second R P Stby V threshold level that is equal to [2 ...

Page 20

V out V O Nominal New Startup Sequence Initiated disable2 Figure 46. Foldback Characteristic NOTE: Foldback is disabled by connecting Pin Overvoltage Protection The overvoltage arrangement consists of a comparator that compares the Pin ...

Page 21

Undervoltage Lockout Section R F Stby V ref enable startup Voltage and Current Startup disable2 7 UVLO1 UVLO1 (to Soft-Start) V disable1 9.0 V Figure 48. V ...

Page 22

VAC to 270 VAC RFI Filter R1 1.0/5 ... C7 1.0 nF/1000 V D1 ... D4 1N4007 R2 68 k/2.0 W Sync C16 C8 2.2 nF 100 1 C15 C10 ...

Page 23

W Input Power Fly−Back Converter 185 V − 270 V Mains Range MC44603AP & MTP6N60E Tests Line Regulation 150 V 130 V 114 V 7.0 V Load Regulation 150 V Cross Regulation 150 V Efficiency Standby Mode P input ...

Page 24

... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...

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