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MC44605 High Safety Latched Mode GreenLineTM PWM Controller for (Multi)Synchronized Applications
The MC44605 is a high performance current mode controller that is specifically designed for off-line converters. The MC44605 has several distinguishing features that make it particularly suitable for multisynchronized monitor applications. The MC44605 synchronization arrangement enables operation from 16 kHz up to 130 kHz. This product was optimized to operate with universal ac mains voltage from 80 V to 280 V, and its high current totem pole output makes it ideally suited for driving a power MOSFET. The MC44605 protections provide well controlled, safe power management. Safety enhancements detect four different fault conditions and provide protection through a disabling latch. Current or Voltage Mode Controller
HIGH SAFETY LATCHED MODE GREENLINETM PWM CONTROLLER FOR (MULTI)SYNCHRONIZED APPLICATIONS
SEMICONDUCTOR TECHNICAL DATA
* * * * * * * * * * * * * * * * * * * *
Current Mode 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 Sensing (Availability of Error Amplifier Output) Synchronization Facility High Current Totem Pole Output Undervoltage Lockout with Hysteresis Low Output dV/dT for Low EMI Low Startup and Operating Current PIN CONNECTIONS
VCC VC Output Gnd Max Power Limitation Over Heating Detection Current Sense Input Demagnetization Detection Input
16 1
P SUFFIX PLASTIC PACKAGE CASE 648
Safety/Protection Features Soft-Start Feature Demagnetization (Zero Current Detection) Protection Overvoltage Protection Facility Against Open Loop EHT Overvoltage Protection (E.H.T.OVP): Protection Against Excessive Amplitude Synchronization Pulses Winding Short Circuit Detection (W.S.C.D.) Limitation of the Maximum Input Power (M.P.L.): Calculation of Input Power for Overload Protection Over Heating Detection (O.H.D.): to Prevent the Power Switch from Excessive Heating
1 2 3 4 5 6 7 8 (Top View)
16 Rref 15 WSCD* Program 14 Voltage Feedback Input 13 Error Amp Output 12 Disabling Block (Cext) 11 Soft-Start Input 10 Osc Capacitor (CT) 9 Sync and
EHTOVP Input
Latched Disabling Mode When one of the following faults is detected: EHT overvoltage, Winding Short Circuit (WSCD), excessive input power (M.P.L.), power switch over heating (O.H.D.), a counter is activated If the counter is activated for a time that is long enough, the circuit gets definitively disabled. The latch can only be reset by removing and then re-applying power
* Winding Short Circuit Detection
ORDERING INFORMATION
Device MC44605P Operating Temperature Range TA = -25 to +85C Package Plastic DIP
GreenLine is a trademark of Motorola, Inc.
(c) Motorola, Inc. 1999
Rev 1
MOTOROLA ANALOG IC DEVICE DATA
1
MC44605
OUTLINE DIMENSIONS
P SUFFIX PLASTIC PACKAGE CASE 648-08 ISSUE R
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. DIM A B C D F G H J K L M S INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040 MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01
-A-
16 9
B
1 8
F S
C
L
-T- H G D
16 PL
SEATING PLANE
K
J TA
M
M
0.25 (0.010)
M
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MOTOROLA ANALOG IC DEVICE DATA MC44605/D

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