MC44608_06 Datasheet, PDF (4/15 Pages) ON Semiconductor – Few External Components Reliable and Flexible SMPS Controller

MC44608
ELECTRICAL CHARACTERISTICS (V_CC = 12 V, for typical values T_A = 25°C, for min/max values T_A = −25°C to +85°C unless
otherwise noted) (Note 2)
Characteristic
DEMAGNETIZATION DETECTION section (note 3)
Demag Comparator Threshold (V_pin1 increasing)
Demag Comparator Hysteresis (Note 4)
Propagation Delay (Input to Output, Low to High)
Input Bias Current (V_demag = 50 mV)
Negative Clamp Level (I_demag = −1.0 mA)
Positive Clamp Level @ I_demag = 125 mA
Positive Clamp Level @ I_demag = 25 mA
OVERTEMPERATURE section
Trip Level Over Temperature
Hysteresis
STANDBY MAXIMUM CURRENT REDUCTION section
Normal Mode Recovery Demag Pin Current Threshold
K FACTORS SECTION FOR PULSED MODE OPERATION
I_CCS / I_stup
MC44608P40
I_CCS / I_stup
MC44608P75
I_CCL / I_stup
(V_stup − UVLO2) / (V_stup − UVLO1)
(UVLO1 − UVLO2) / (V_stup − UVLO1)
I_CS / V_csth
Demag ratio I_ovp / I_dem NM
(V3 _{1.0 mA} − V3 _{0.5 mA}) / (1.0 mA − 0.5 mA)
V_control Latchoff
SUPPLY SECTION
Minimum Startup Voltage
V_CC Startup Voltage
Output Disabling V_CC Voltage After Turn On
Hysteresis (V_stup−th − V_uvlo1)
V_CC Undervoltage Lockout Voltage
Hysteresis (V_uvlo1 − V_uvlo2)
Absolute Normal Condition V_CC Start Current @ (V_i = 100 V) and
(V_CC = 9.0 V)
Switching Phase Supply Current (no load)
MC44608P40
MC44608P75
Symbol
V_dmg−th
H_dmg
t_PHL(In/Out)
I_dem−lb
V_{cl−neg−dem}
V_{cl−pos−dem−H}
V_{cl−pos−dem−L}
T_high
T_hyst
I_dem−NM
10 x K1
10 x K1
10³ x K2
10² x K_sstup
10² x K_sl
10⁶ x Y_cstby
Dmgr
R3
V3
V_ilow
V_stup−th
V_uvlo1
H_{stup−uvlo1}
V_uvlo2
H_{uvlo1−uvlo2}
−(I_CC)
I_CCS
Min
30
−
−
−0.6
−0.9
2.05
1.4
−
−
20
2.4
2.8
46
1.8
90
175
3.0
−
−
−
12.5
9.5
−
6.2
−
7.0
2.0
2.4
Typ
50
30
300
−
−0.7
2.3
1.7
160
30
25
2.9
3.3
52
2.2
120
198
4.7
1800
4.8
−
13.1
10
3.1
6.6
3.4
9.5
2.6
3.2
Max Unit
69
mV
−
mV
−
ns
−
mA
−0.4
V
2.8
V
1.9
V
−
°C
−
°C
30
mA
3.8
−
4.2
−
63
−
2.6
−
150
−
225
−
5.5
−
−
W
−
V
50
V
13.8
V
10.5
V
−
V
7.0
V
−
V
12.8 mA
3.6
mA
4.0
Latched Off Phase Supply Current
I_{CC−latch}
0.3
0.5
0.68 mA
Hiccup Mode Duty Cycle (no load)
d_Hiccup
−
10
−
%
2. Adjust V_CC 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.
3. This function can be inhibited by connecting pin 1 to GND.
4. Guaranteed by design (non tested).
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