MC44608P100

Manufacturer Part NumberMC44608P100
DescriptionIC PWM FLYBCK ISO VM 8DIP
ManufacturerON Semiconductor
MC44608P100 datasheet
 


Specifications of MC44608P100

Pwm TypeVoltage ModeNumber Of Outputs1
Frequency - Max110kHzDuty Cycle86%
Voltage - Supply6.6 V ~ 13 VBuckNo
BoostNoFlybackYes
InvertingNoDoublerNo
DividerNoCukNo
IsolatedYesOperating Temperature-25°C ~ 85°C
Package / Case8-DIP (0.300", 7.62mm)Frequency-max110kHz
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantOther namesMC44608P100OS
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MC44608
Few External Components
Reliable and Flexible
SMPS Controller
The MC44608 is a high performance voltage mode controller
designed for off−line converters. This high voltage circuit that
integrates the start−up current source and the oscillator capacitor,
requires few external components while offering a high flexibility and
reliability.
The device also features a very high efficiency stand−by
management consisting of an effective Pulsed Mode operation. This
technique enables the reduction of the stand−by power consumption to
approximately 1.0 W while delivering 300 mW in a 150 W SMPS.
Integrated Start−Up Current Source
Lossless Off−Line Start−Up
Direct Off−Line Operation
Fast Start−Up
General Features
Flexibility
Duty Cycle Control
Undervoltage Lockout with Hysteresis
On Chip Oscillator Switching Frequency 40, 75, or 100 kHz
Secondary Control with Few External Components
Protections
Maximum Duty Cycle Limitation
Cycle by Cycle Current Limitation
Demagnetization (Zero Current Detection) Protection
“Over V
Protection” Against Open Loop
CC
Programmable Low Inertia Over Voltage Protection
Against Open Loop
Internal Thermal Protection
SMPS Controller
Pulsed Mode Techniques for a Very High Efficiency
Low Power Mode
Lossless Startup
Low dV/dT for Low EMI Radiations
Semiconductor Components Industries, LLC, 2003
December, 2003 − Rev. 6
http://onsemi.com
8
1
PDIP−8
P SUFFIX
CASE 626
PIN CONNECTIONS AND
MARKING DIAGRAM
Demag
1
I
2
sense
Control Input
3
(Top View)
GND
4
(Top View)
AWL
= Manufacturing Code
YYWW = Date Code
ORDERING INFORMATION
Switching
Device
Frequency
MC44608P40
40 kHz
MC44608P75
75 kHz
MC44608P100
100 kHz
1
8
V
i
7
6
V
CC
5
Driver
Package
Shipping
Plastic
50/Rail
DIP−8
Plastic
50/Rail
DIP−8
Plastic
50/Rail
DIP−8
Publication Order Number:
MC44608/D

MC44608P100 Summary of contents

  • Page 1

    ... Demag sense Control Input 3 (Top View) GND 4 (Top View) AWL = Manufacturing Code YYWW = Date Code ORDERING INFORMATION Switching Device Frequency MC44608P40 40 kHz MC44608P75 75 kHz MC44608P100 100 kHz Driver Package Shipping Plastic 50/Rail DIP−8 Plastic 50/Rail DIP−8 Plastic 50/Rail DIP−8 ...

  • Page 2

    DMG + − /20 mV Demag Logic Latched off Output Phase Start−up Start−up Phase Switching m Phase 200 A Phase & Stand−by Stand−by Management OC Leading Edge Output Blanking 2 Isense MAXIMUM RATINGS Rating Total ...

  • Page 3

    ... Leading Edge Blanking + Propagation Delay Leading Edge Blanking + Propagation Delay Leading Edge Blanking + Propagation Delay OSCILLATOR SECTION Normal Operation Frequency MC44608P40 Normal Operation Frequency MC44608P75 Normal Operation Frequency MC44608P100 Maximum Duty Cycle @ osc OVERVOLTAGE SECTION Quick OVP Input Filtering (R = 100 kW) ...

  • Page 4

    ... V cl−neg−dem dem−NM MC44608P40 MC44608P75 MC44608P100 stup−uvlo1 H uvlo1−uvlo2 = 100 V) and i MC44608P40 MC44608P75 MC44608P100 I CC−latch d http://onsemi.com 4 = − +85 C unless otherwise A Min Typ Max dmg−th H − 30 − dmg − 300 − −0.6 − − dem−lb − ...

  • Page 5

    Pin Name The Demag pin offers 3 different functions: Zero voltage crossing detection (50 mV current detection 1 Demag and 120 mA current detection. The 24 mA level is used to detect the secondary reconfiguration status and the ...

  • Page 6

    In stand−by mode, this current can be lowered as due to the activation of a 200 mA current source (kW) + Ipk max *stby R sense (W) Switching Phase m 200 A & Isense ...

  • Page 7

    OSC 4 V Vcont 2.4 V Clock DMG Iprim Figure 6. The OSC and Clock signals are provided according to the Figure 6. The Clock signals correspond to the CT capacitor discharge. The bottom curve represents the current flowing in ...

  • Page 8

    Overload In the hiccup mode the 3 distinct phases are described as follows (refer to Figure 7): The SWITCHING PHASE: The SMPS output is low and the regulation block reacts by increasing the ON time (dmax = 80%). The ...

  • Page 9

    EQUATION 1 Start−up Phase Duration: (V stup * UVLO2) C Vcc t start– stup where the start−up current flowing through V stup C is the V capacitor value Vcc CC EQUATION 2 Switching Phase Duration: (V ...

  • Page 10

    EQUATION ccS Stup I stup EQUATION stup where ccs stup ...

  • Page 11

    Pin6 V Voltage (V) CC Figure 9. Output Switching Speed − 0.0 0.5 ...

  • Page 12

    C 10.00 9. 6.00 5.00 0 100 200 Vi Pin8 Voltage (Vi) Figure 15. High Voltage Current Source The data in Figure 16 corresponds to the waveform in Figure 17. The Figure ...

  • Page 13

    The Figure 19 represents a complete power supply using the secondary reconfiguration. The specification is as follows: Input source: 3 Outputs Output power Stand−by mode R F6 47288900 FI RFI WIDE C1 FILTER MAINS 100 nF C3 D1, D2, D3, ...

  • Page 14

    The secondary reconfiguration is activated by the mP through the switch. The dV/dt appearing on the high voltage winding (pins 14 of the transformer) at every TMOS switch off, produces a current spike through the series RC network R7, C17. ...

  • Page 15

    F −A− NOTE 2 C −T− N SEATING PLANE 0.13 (0.005) M MC44608 PACKAGE DIMENSIONS PDIP−8 P SUFFIX PLASTIC PACKAGE CASE 626−05 ISSUE ...

  • Page 16

    ... Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com MC44608 N. American Technical Support: 800−282−9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone: 81−3−5773−3850 http://onsemi.com 16 ON Semiconductor Website: http://onsemi ...