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MC44605 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. MC44605
Description  High Safety, Latched Mode, GreenLine TM PWM Controller for (Multi) Synchronized Applications
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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MC44605 Datasheet(HTML) 5 Page - ON Semiconductor

 
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MC44605
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ELECTRICAL CHARACTERISTICS (VCC and VC = 12 V, Rref = 10 kW, CT = 2.2 nF, for typical values TA = 25°C, for
min/max values TA = −25° to +85°C unless otherwise noted.) (Note 5)
Characteristic
Pin #
Symbol
Min
Typ
Max
Unit
REFERENCE SECTION
Reference Output Voltage (VCC = 10 V to 15 V)
16
Vref
2.4
2.5
2.6
V
Reference Current Range (Iref = Vref/Rref, R = 5.0 k to 25 kW)
16
Iref
−500
−100
mA
Reference Voltage Over Iref Range
DVref
−40
40
mV
DEMAGNETIZATION DETECTION SECTION (Note 6)
Demagnetization Detect Input
Demagnetization Comparator Threshold (Vpin9 Decreasing)
Propagation Delay (Input to Output, Low to High)
Input Bias Current (Vdemag = 65 mV)
8
Vdemag−th
tPLH(In/Out)
Idemag−lb
50
−0.5
65
0.5
80
mV
ms
mA
Minimum Off−Time when the pin 8 is grounded
TDEM−GND
1.5
3.0
4.5
ms
Negative Clamp Level (Idemag = −2.0 mA)
CLVL−neg
−0.50
−0.38
−0.25
V
Positive Clamp Level (Idemag = +2.0 mA)
CLVL−pos
0.50
0.72
0.85
V
SOFT−START SECTION (Note 7)
Ratio Charge Current/Iref (TA = −25° to +85°C)
Iss−ch/Iref
0.37
0.43
Discharge Current (Vsoft−start = 1.0 V)
Idischarge
1.5
5.0
mA
Clamp Level
VSS−CLVL
2.2
2.4
2.6
V
Circuit Inhibition Threshold (Note 8)
VSSinhi
30
150
mV
VCS Soft−Start Clamp Level (Rsoft−start = 5 kW)
VCSsoft−start
0.45
0.5
0.55
V
OVERVOLTAGE SECTION
Propagation Delay (VCC > 18.1 V to Vout Low)
TPHL(In/Out)
1.0
4.0
ms
Protection Level on VCC (TA = −25° to +85°C)
VCC prot
15.9
18.1
V
EHT OVP SECTION (Note 9)
Negative Clamp Level (Isynch−in = −2.0 mA)
NEG−SYN
C
−0.65
−0.5
−0.35
V
EHT OVP Input Threshold
Vref
7.0
7.4
7.8
V
EHT OVP Input Bias Current (VEHT OVP(pin 9) = 0 V)
9
IEHTOVP
−5.0
0
mA
WINDING SHORT CIRCUIT DETECTION SECTION
WSCD Threshold with Ipin15 = 200 mA
Vshift
70
100
120
mV
MPL & OHD SECTION
MPL Parameter (Note 10)
ΓMPL
0.185
0.240
0.295
V−1
MPL Comparator Threshold (Note 11)
VMPL−th
2.4
2.5
2.6
V
OHD Parameter (Note 12)
ΓOHD
1.15
1.50
1.85
V−1
OHD Comparator Threshold (Note 13)
VOHD−th
2.4
2.5
2.6
V
5. Adjust VCC above the startup threshold before setting to 12 V. Low duty cycle pulse techniques are used during test to maintain junction
temperature as close to ambient as possible.
6. This function can be inhibited by connecting pin 8 to GND. In this case, there is a minimum off−time equal to TDEM−GND.
7. The MC44605 can be shut down by connecting soft−start pin (pin 11) to GND.
8. The circuit is shutdown if the soft−start pin voltage is lower than this level.
9. This function can be inhibited by connecting pin 9 to GND. In this case, the synchronization block is inhibited too and the MC44605 works
in free mode.
10. This parameter is defined in the MPL §. This parameter is obtained by measuring the MPL pin average current and dividing this result by the
corresponding squared VCS, the measured frequency value and the CT value deducted from the measured frequency value.
Measurement conditions: VFeedback(pin 14) = 2.3 V, Vsoft−start(pin 11) = 0.5 V and pins 7, 8, and 9 connected to GND (the working frequency
is typically equal to 18 kHz − Rref = 10 kW "1%, CT = 2.2 nF).
11. The MPL comparator output is DisMPL.
12. This parameter is defined in the OHD §. This parameter is obtained by measuring the OHD pin average current and dividing this result by
the corresponding squared VCS value and multiplying it by the Rref value.
Measurement conditions: VFeedback(pin 14) = 2.3 V, Vsoft−start(pin 11) = 0.5 V and pins 7, 8, and 9 connected to GND (the working frequency
is typically equal to 18 kHz − Rref = 10 kW "1%, CT = 2.2 nF).
13. The OHD comparator output is DisOHD.


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