SCY99194 Datasheet, PDF (5/40 Pages) ON Semiconductor – Fixed Frequency Current Mode Controller

SCY99194
ELECTRICAL CHARACTERISTICS (For typical values T_J = 25°C, for min/max values T_J = −40°C to +125°C, V_HV = 125 V,
V_CC = 11 V unless otherwise noted)
Characteristics
Test Condition
Symbol
Min
Typ
Max
HIGH VOLTAGE CURRENT SOURCE
Minimum voltage for current source
operation
V_HV(min)
−
30
40
Current flowing out of V_CC pin
Off−state leakage current
Off−mode HV supply current
SUPPLY
V_CC = 0 V
V_CC = V_CC(on) − 0.5 V
V_HV = 500 V, V_CC = 15 V
V_HV = 141 V,
V_HV = 325 V,
V_CC loaded by 4.7 mF cap
I_start1
I_start2
I_start(off)
I_HV(off)
0.2
0.5
0.8
5
8
11
10
25
50
−
45
60
−
50
70
HV current source regulation threshold
Turn−on threshold level, V_CC going up
HV current source stop threshold
V_CC(reg)
V_CC(on)
8
11
−
11.0 12.0 13.0
HV current source restart threshold
Turn−off threshold
Overvoltage threshold
Blanking duration on V_CC(off) and V_CC(ovp)
detection
V_CC(min)
9.5
10.5 11.5
V_CC(off)
8.5
8.9
9.3
V_CC(ovp)
25
26.5
28
t_VCC(blank)
−
10
−
V_CC decreasing level at which the internal
logic resets
V_CC(reset)
4.8
7.0
7.7
V_CC level for I_START1 to I_START2 transition
Internal current consumption (Note 5)
DRV open, V_FB = 3 V, 65 kHz
V_CC(inhibit)
0.2
0.8
1.25
I_CC1
1.3
1.85
2.2
Cdrv = 1 nF, V_FB = 3 V, 65 kHz
I_CC2
1.8
2.6
3.0
Off mode (skip or before start−up)
I_CC3
0.67
0.9
1.13
X2 DISCHARGE
Fault mode (fault or latch)
I_CC4
0.3
0.6
0.9
Comparator hysteresis observed at HV pin
HV signal sampling period
Timer duration for no line detection
Discharge timer duration
OSCILLATOR
V_HV(hyst)
1.5
3.5
5
T_sample
−
1.0
−
t_DET
21
32
43
t_DIS
21
32
43
Oscillator frequency
Maximum duty cycle
Frequency jittering amplitude, in percentage
of F_OSC
Frequency jittering modulation frequency
FREQUENCY FOLDBACK
f_OSC
D_MAX
A_jitter
F_jitter
58
65
72
−
80
−
±4
±6
±8
85
125
165
Feedback voltage threshold below which
frequency foldback starts
V_FB(foldS)
1.8
2.0
2.2
Feedback voltage threshold below which
frequency foldback is complete
V_FB(foldE)
0.8
0.9
1.0
Minimum switching frequency
V_FB = V_skip(in) + 0.1
f_OSC(min)
22
27
32
5. Internal supply current only, currents sourced via FB pin is not included (current is flowing in GND pin only).
6. Guaranteed by design.
7. CS pin source current is a sum of I_bias and I_OPC, thus at V_HV = 125 V is observed the I_bias only, because I_OPC is switched off.
Unit
V
mA
mA
mA
V
V
V
V
V
ms
V
V
mA
V
ms
ms
ms
kHz
%
%
Hz
V
V
kHz
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