LinearVoltageRegulators Motorola Semiconductor Products, LinearVoltageRegulators Datasheet - Page 22

• Manufacturer Part Number: LinearVoltageRegulators
• Description: Analog And Interface Integratedcircuits Selector Guide & Cross Reference
• Manufacturer: Motorola Semiconductor Products

Single–Ended GreenLine
High Safety Latched Mode GreenLine
for (Multi)Synchronized Applications
MC44605P
T A = –25 to +85 C, Case 648
troller that is specifically designed for off–line converters. The
MC44605 has several distinguishing features that make it
particularly suitable for multisynchronized monitor applica-
tions.
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.
power management. Safety enhancements detect four differ-
ent fault conditions and provide protection through a disab-
ling latch.
Current or Voltage Mode Controller
ANALOG AND INTERFACE INTEGRATED CIRCUITS
SELECTOR GUIDE & CROSS REFERENCE
Current Mode Operation Up to 250 kHz Output Switching
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
Synchronization Facility
Frequency
Amplifier Output)
The MC44605 is a high performance current mode con-
The MC44605 synchronization arrangement enables
The MC44605 protections provide well controlled, safe
Controllers
(continued)
PWM Controller
Safety/Protection Features
Latched Disabling Mode
High Current Totem Pole Output
Undervoltage Lockout with Hysteresis
Low Output dV/dT for Low EMI
Low Startup and Operating Current
Soft–Start Feature
Demagnetization (Zero Current Detection) Protection
Overvoltage Protection Facility Against Open Loop
EHT Overvoltage Protection (E.H.T.OVP): Protection
Winding Short Circuit Detection (W.S.C.D.)
Limitation of the Maximum Input Power (M.P.L.):
Over Heating Detection (O.H.D.): to Prevent the Power
When one of the following faults is detected: EHT
If the counter is activated for a time that is long enough,
Against Excessive Amplitude Synchronization Pulses
Calculation of Input Power for Overload Protection
Switch from Excessive Heating
overvoltage, Winding Short Circuit (WSCD), excessive
input power (M.P.L.), power switch over heating (O.H.D.),
a counter is activated
the circuit gets definitively disabled. The latch can only be
reset by removing and then re–applying power
MOTOROLA
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