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NCP1608
Table 3. ELECTRICAL CHARACTERISTICS (Continued)
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/m ax values, T J = ? 40 ° C to 125 ° C, unless otherwise specified)
Characteristic
Test Conditions
Symbol
Min
Typ
Max
Unit
RAMP CONTROL
Ct Peak Voltage
On Time Capacitor Charge Current
Ct Capacitor Discharge Duration
PWM Propagation Delay
V Control = open
V Control = open
V Ct = 0 V to V Ct(MAX)
V Control = open
V Ct = V Ct(MAX) ? 100 mV to 500 mV
dV/dt = 30 V/ m s
V Ct = V Control ? Ct (offset)
to V DRV = 10%
V Ct(MAX)
I charge
t Ct(discharge)
t PWM
4.775
235
?
?
4.93
275
50
130
5.025
297
150
220
V
m A
ns
ns
CURRENT SENSE
Current Sense Voltage Threshold
V ILIM
0.45
0.5
0.55
V
Leading Edge Blanking Duration
Overcurrent Detection Propagation
Delay
Current Sense Bias Current
V CS = 2 V, V DRV = 90% to 10%
dV/dt = 10 V/ m s
V CS = V ILIM to V DRV = 10%
V CS = 2 V
t LEB
t CS
I CS
100
40
? 1
190
100
?
350
170
1
ns
ns
m A
ZERO CURRENT DETECTION
ZCD Arming Threshold
ZCD Triggering Threshold
ZCD Hysteresis
ZCD Bias Current
Positive Clamp Voltage
Negative Clamp Voltage
ZCD Propagation Delay
Minimum ZCD Pulse Width
Maximum Off Time in Absence of ZCD
Transition
V ZCD = Increasing
V ZCD = Decreasing
V ZCD = 5 V
I ZCD = 3 mA
I ZCD = ? 2 mA
V ZCD = 2 V to 0 V ramp,
dV/dt = 20 V/ m s
V ZCD = V ZCD(TRIG) to V DRV = 90%
Falling V DRV = 10% to
Rising V DRV = 90%
V ZCD(ARM)
V ZCD(TRIG)
V ZCD(HYS)
I ZCD
V CL(POS)
V CL(NEG)
t ZCD
t SYNC
t start
1.25
0.6
500
? 2
9.8
? 0.9
?
?
75
1.4
0.7
700
?
10
? 0.7
100
70
165
1.55
0.83
900
+2
12
? 0.5
170
?
300
V
V
mV
m A
V
V
ns
ns
m s
DRIVE
Drive Resistance
Rise Time
Fall Time
Drive Low Voltage
I source = 100 mA
I sink = 100 mA
10% to 90%
90% to 10%
V CC = V CC(on) ? 200 mV,
I sink = 10 mA
R OH
R OL
t rise
t fall
V out(start)
?
?
?
?
?
12
6
35
25
?
20
13
80
70
0.2
W
ns
ns
V
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