Datasheet

NCL30000
http://onsemi.com
5
Table 3. ELECTRICAL CHARACTERISTICS
V
MFP
= 2.4 V, V
Control
=4V, Ct=1nF, V
CS
=0V, V
ZCD
=0V, C
DRV
= 1 nF, V
CC
= 12 V, unless otherwise specified
(For typical values, T
J
=25C. For min/max values, T
J
= −40C to 125C, unless otherwise specified)
Characteristic
Test Conditions Symbol Min Typ Max Unit
STARTUP AND SUPPLY CIRCUITS
Startup Voltage Threshold
V
CC
Increasing V
CC(on)
11 12 12.5 V
Minimum Operating Voltage V
CC
Decreasing V
CC(off)
8.8 9.5 10.2 V
Supply Voltage Hysteresis H
UVLO
2.2 2.5 2.8 V
Startup Current Consumption 0V<V
CC
<V
CC(on)
− 200 mV I
cc(startup)
− 24 35
mA
No Load Switching
Current Consumption
C
DRV
= Open, 70 kHz Switching,
V
CS
=2V
I
cc1
− 1.4 1.7 mA
Switching Current Consumption 70 kHz Switching, V
CS
=2V I
cc2
− 2.1 2.6 mA
Fault Condition Current Consumption No Switching, V
MFP
=0V I
cc(fault)
− 0.75 0.95 mA
OVERVOLTAGE AND UNDERVOLTAGE PROTECTION
Overvoltage Detect Threshold
V
MFP
= Increasing V
OVP
/V
REF
105 106 108 %
Overvoltage Hysteresis V
OVP(HYS)
20 60 100 mV
Overvoltage Detect Threshold
Propagation Delay
V
MFP
= 2 V to 3 V ramp,
dV/dt = 1 V/ms
V
MFP
= V
OVP
to V
DRV
= 10%
t
OVP
− 500 800 ns
Undervoltage Detect Threshold V
MFP
= Decreasing V
UVP
0.25 0.31 0.4 V
Undervoltage Detect Threshold
Propagation Delay
V
MFP
= 1 V to 0 V ramp,
dV/dt = 10 V/ms
V
MFP
= V
UVP
to V
DRV
= 10%
t
UVP
100 200 300 ns
ERROR AMPLIFIER
Voltage Reference
T
J
= 25C
T
J
= −40C to 125C
V
REF
2.475
2.460
2.500
2.500
2.525
2.540
V
Voltage Reference Line Regulation V
CC(on)
+ 200 mV < V
CC
< 20 V V
REF(line)
−10 − 10 mV
Error Amplifier Current Capability V
MFP
= 2.6 V
V
MFP
= 1.08*V
REF
V
MFP
= 0.5 V
I
EA(sink)
I
EA(sink)OVP
I
EA(source)
6
10
−110
10
20
−210
20
30
−250
mA
Transconductance V
MFP
= 2.4 V to 2.6 V
T
J
= 25C
T
J
= −40C to 125C
gm
90
70
110
110
120
135
mS
Feedback Pin Internal Pull−Down
Resistor
V
MFP
= V
UVP
to V
REF
R
MFP
2 4.6 10
MW
Feedback Bias Current V
MFP
= 2.5 V I
MFP
0.25 0.54 1.25
mA
Control Bias Current V
MFP
= 0 V I
Control
−1 − 1
mA
Maximum Control Voltage
I
Control(pullup)
= 10 mA,
V
MFP
= V
REF
V
EAH
5 5.5 6 V
Minimum Control Voltage to Generate
Drive Pulses
V
Control
= Decreasing until
V
DRV
is low, V
Ct
= 0 V
Ct
(offset)
0.37 0.65 0.88 V
Control Voltage Range V
EAH
– Ct
(offset)
V
EA(DIFF)
4.5 4.9 5.3 V