ncp1608 ON Semiconductor, ncp1608 Datasheet - Page 5

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ncp1608

Manufacturer Part Number
ncp1608
Description
Critical Conduction Mode Pfc Controller Utilizing A Transconductance Error Amplifier
Manufacturer
ON Semiconductor
Datasheet

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Ct Peak Voltage
On Time Capacitor Charge Current
Ct Capacitor Discharge Duration
PWM Propagation Delay
Current Sense Voltage Threshold
Leading Edge Blanking Duration
Overcurrent Detection Propagation
Delay
Current Sense Bias Current
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
Drive Resistance
Rise Time
Fall Time
Drive Low Voltage
Table 3. ELECTRICAL CHARACTERISTICS
V
(For typical values, T
RAMP CONTROL
CURRENT SENSE
ZERO CURRENT DETECTION
DRIVE
FB
= 2.4 V, V
Characteristic
Control
= 4 V, Ct = 1 nF, V
J
= 25°C. For min/max values, T
CS
= 0 V, V
V
V
Ct
V
ZCD
CS
V
= V
V
CS
ZCD
V
V
= V
Falling V
= 2 V, V
V
Ct
ZCD
CC
Ct(MAX)
V
Rising V
Ct
= V
V
(Continued)
J
Test Conditions
I
ZCD
= V
ZCD(TRIG)
dV/dt = 30 V/ms
dV/dt = 10 V/ms
dV/dt = 20 V/ms
source
= 0 V, C
V
V
V
to V
ZCD
= −40°C to 125°C, unless otherwise specified)
I
= V
I
= 0 V to V
sink
I
I
ZCD
= 2 V to 0 V ramp,
10% to 90%
90% to 10%
Control
Control
Control
sink
ILIM
V
ZCD
V
Control
ZCD
= Decreasing
CS
CC(on)
DRV
http://onsemi.com
= Increasing
DRV
= 100 mA
−100 mV to 500 mV
DRV
= 10 mA
= −2 mA
to V
= 100 mA
DRV
= 3 mA
= 2 V
= 5 V
DRV
= open
= open
= open
= 10%
= 90% to 10%
− Ct
to V
= 10% to
−200 mV,
DRV
= 90%
Ct(MAX)
= 1 nF, V
(offset)
DRV
5
= 10%
= 90%
CC
= 12 V, unless otherwise specified
t
V
Ct(discharge)
V
V
V
V
V
V
Symbol
ZCD(TRIG)
ZCD(ARM)
ZCD(HYS)
I
CL(POS)
CL(NEG)
out(start)
t
Ct(MAX)
charge
t
V
I
t
SYNC
t
R
t
R
PWM
t
t
I
ZCD
ZCD
start
t
LEB
rise
ILIM
CS
CS
fall
OH
OL
4.775
0.45
1.25
−0.9
Min
235
100
500
0.6
− 2
9.8
40
−1
75
4.93
−0.7
Typ
275
130
190
100
700
100
165
0.5
1.4
0.7
50
10
70
12
35
25
6
5.025
Max
0.55
1.55
0.83
−0.5
297
150
220
350
170
900
170
300
+ 2
0.2
12
20
13
80
70
1
Unit
mV
mA
mA
mA
ns
ns
ns
ns
ns
ns
ms
ns
ns
W
V
V
V
V
V
V
V

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