NCP1608
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4
Table 3. ELECTRICAL CHARACTERISTICS
V
FB
= 2.4 V, V
Control
= 4 V, Ct = 1 nF, V
CS
= 0 V, V
ZCD
= 0 V, C
DRV
= 1 nF, V
CC
= 12 V, unless otherwise specified
(For typical values, T
J
= 25°C. For min/max values, T
J
= −55°C to 125°C (Note 6), V
CC
= 12 V, 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 0 V < 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
= 2 V
I
cc1
− 1.4 1.7 mA
Switching Current Consumption 70 kHz Switching, V
CS
= 2 V I
cc2
− 2.1 2.6 mA
Fault Condition Current Consumption No Switching, V
FB
= 0 V I
cc(fault)
− 0.75 0.95 mA
OVERVOLTAGE AND UNDERVOLTAGE PROTECTION
Overvoltage Detect Threshold V
FB
= Increasing V
OVP
/V
REF
105 106 108 %
Overvoltage Hysteresis V
OVP(HYS)
20 60 100 mV
Overvoltage Detect Threshold
Propagation Delay
V
FB
= 2 V to 3 V ramp,
dV/dt = 1 V/ms
V
FB
= V
OVP
to V
DRV
= 10%
T
J
= −40°C to +125°C
T
J
= −55°C to +125°C (Note 6)
t
OVP
300
210
500
500
800
800
ns
Undervoltage Detect Threshold V
FB
= Decreasing V
UVP
0.25 0.31 0.4 V
Undervoltage Detect Threshold Propa-
gation Delay
V
FB
= 1 V to 0 V ramp,
dV/dt = 10 V/ms
V
FB
= V
UVP
to V
DRV
= 10%
T
J
= −40°C to +125°C
T
J
= −55°C to +125°C (Note 6)
t
UVP
100
50
200
200
300
300
ns
ERROR AMPLIFIER
Voltage Reference T
J
= 25°C
T
J
= −40°C to 125°C
T
J
= −55°C to 125°C (Note 6)
V
REF
2.475
2.460
2.450
2.500
2.500
2.500
2.525
2.540
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
FB
= 2.6 V
V
FB
= 1.08*V
REF
V
FB
= 0.5 V
T
J
= −40°C to +125°C
T
J
= −55°C to +125°C (Note 6)
I
EA(sink)
I
EA(sink)OVP
I
EA(source)
6
10
−250
−250
10
20
−210
−210
20
30
−110
−88
mA
Transconductance V
FB
= 2.4 V to 2.6 V
T
J
= 25°C
T
J
= −40°C to 125°C
T
J
= −55°C to +125°C (Note 6)
gm
90
70
70
110
110
110
120
135
150
mS
Feedback Pin Internal Pull−Down
Resistor
V
FB
= V
UVP
to V
REF
R
FB
2 4.6 10 MW
Feedback Bias Current V
FB
= 2.5 V
T
J
= −40°C to +125°C
T
J
= −55°C to +125°C (Note 6)
I
FB
0.25
0.2
0.54
0.54
1.25
1.25
mA
Control Bias Current V
FB
= 0 V I
Control
−1 − 1 mA
Maximum Control Voltage I
Control(pullup)
= 10 mA, V
FB
= V
REF
T
J
= −40°C to +125°C
T
J
= −55°C to +125°C (Note 6)
V
EAH
5
5
5.5
5.5
6
6.05
V
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
6. For coldest temperature, QA sampling at −40°C in production and −55°C specification is Guaranteed by Characterization.
