NCP3020A Datasheet, PDF (4/23 Pages) ON Semiconductor – Synchronous PWM Controller

NCP3020A, NCP3020B
ELECTRICAL CHARACTERISTICS (−40°C < T_J < +125°C, V_CC = 12 V, for min/max values unless otherwise noted)
Characteristic
Conditions
Min
Typ
Max
Unit
Input Voltage Range
−
4.5
28
V
SUPPLY CURRENT
V_CC Supply Current
NCP3020A
V_CC Supply Current
NCP3020B
V_FB = 0.55 V, Switching, V_CC = 4.5 V
V_FB = 0.55 V, Switching, V_CC = 28 V
V_FB = 0.55 V, Switching, V_CC = 4.5 V
V_FB = 0.55 V, Switching, V_CC = 28 V
−
5.1
8.0
mA
−
6.2
11
mA
−
6.8
TBD
mA
−
8.3
TBD
mA
UNDER VOLTAGE LOCKOUT
UVLO Rising Threshold
UVLO Falling Threshold
V_CC Rising Edge
V_CC Falling Edge
4.0
4.3
4.7
V
3.5
3.9
4.3
V
OSCILLATOR
Oscillator Frequency NCP3020A
T_J = +25°C, 4.5 V v V_CC v 28 V
250
300
350
kHz
T_J = −40°C to +125°C, 4.5 V v V_CC v 28 V
240
300
360
kHz
Oscillator Frequency NCP3020B
T_J = +25°C, 4.5 V v V_CC v 28 V
TBD
600
TBD
kHz
T_J = −40°C to +125°C, 4.5 V v V_CC v 28 V
TBD
600
TBD
kHz
Ramp−Amplitude Voltage
V_peak − V_alley
−
1.5
−
V
Ramp Valley Voltage
0.46
0.71
0.85
V
PWM
Minimum Duty Cycle
Maximum Duty Cycle
Soft Start Ramp Time
NCP3020A
NCP3020B
(Note 7)
V_FB = V_COMP
−
7.0
−
%
80
84
−
%
−
6.8
−
ms
−
3.4
−
ERROR AMPLIFIER (GM)
Transconductance
Open Loop dc Gain
Output Source Current
Output Sink Current
FB Input Bias Current
Feedback Voltage
COMP High Voltage
COMP Low Voltage
OUTPUT VOLTAGE FAULTS
Feedback OOV Threshold
Feedback OUV Threshold
0.9
1.3
1.7
mS
(Notes 7 and 9)
−
70
−
dB
V_FB = 545 mV
V_FB = 655 mV
45
70
100
mA
45
70
100
mA
−
0.5
500
nA
TJ = 25 C
0.594
0.6
0.606
V
4.5 V < V_IN < 28 V, −40°C < T_J < +125°C
0.588
0.6
0.612
V
V_FB = 0 V
V_FB = 2 V
4.0
4.4
5.0
V
−
65
200
mV
0.68
0.75
0.82
V
0.42
0.45
0.48
V
OVERCURRENT
ISET Source Current
TBD
12.5
TBD
mA
Current Limit Set Voltage (Note 8)
R_SET = 22.5 kW
TBD
298
TBD
mV
7. Guaranteed by design.
8. The voltage sensed across the high side MOSFET during conduction.
9. This assumes 100 pF capacitance to ground on the COMP Pin and a typical internal R_o of > 10 MW.
10. This is not a protection feature.
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