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NCP1234BD100R2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33
NCP1234
www.onsemi.com
7
ELECTRICAL CHARACTERISTICS (For typical values T
J
= 25°C, for min/max values T
J
= −40°C to +125°C, V
HV
= 125 V,
V
CC
= 11 V unless otherwise noted)
Characteristics UnitMaxTypMinSymbolTest Condition
LATCH−OFF INPUT
High threshold
V
Latch
going up V
OVP
2.35 2.5 2.65 V
Low threshold V
Latch
going down V
OTP
0.76 0.8 0.84 V
Current source for direct NTC
connection
During normal operation
During soft−start
V
Latch
= 0 V
I
NTC
I
NTC(SSTART)
65
130
95
190
105
210
mA
Blanking duration on high latch
detection
65 kHz version
100 kHz version
t
Latch(OVP)
35
25
50
35
70
45
ms
Blanking duration on low latch
detection
t
Latch(OTP)
− 350 −
ms
Clamping voltage I
Latch
= 0 mA
I
Latch
= 1 mA
V
clamp0(Latch)
V
clamp1(Latch)
1.0
2.0
1.2
2.4
1.4
3.0
V
TEMPERATURE SHUTDOWN
Temperature shutdown
T
J
going up T
TSD
135 150 165 °C
Temperature shutdown
hysteresis
T
J
going down T
TSD(HYS)
20 30 40 °C
NCP1234
www.onsemi.com
8
TYPICAL PERFORMANCE CHARACTERISTICS
20.00
22.00
24.00
26.00
28.00
30.00
32.00
34.00
36.00
38.00
40.00
−50 −25 0 25 50 75 100 125
Figure 3. Minimum Current Source Operation
V
HV(min)
TEMPERATURE (°C)
V
HV(min)
(V)
0
5
10
15
20
25
30
35
−50 −25 0 25 50 75 100 12
5
Figure 4. Off−State Leakage Current I
start(off)
TEMPERATURE (°C)
I
start(off)
(V)
0.65
0.66
0.67
0.68
0.69
0.70
0.71
0.72
0.73
0.74
0.75
−50 −25 0 25 50 75 100 125
V
ILIM
(V)
TEMPERATURE (°C)
Figure 5. Maximum Internal Current Setpoint
V
ILIM
0.95
0.97
0.99
1.01
1.03
1.05
1.07
1.09
1.11
1.13
1.15
−50 −25 0 25 50 75 100 12
5
TEMPERATURE (°C)
V
CS(stop)
(V)
Figure 6. Threshold for Immediate Fault
Protection Activation V
CS(stop)
40
50
60
70
80
90
100
110
−50 −25 0 25 50 75 100 125
TEMPERATURE (°C)
t
delay
(ns)
Figure 7. Propagation Delay t
delay
TEMPERATURE (°C)
t
LEB
(ns)
Figure 8. Leading Edge Blanking Duration t
LEB
200
210
220
230
240
250
260
270
280
290
300
−50 −25 0 25 50 75 100 12
5
NCP1234
www.onsemi.com
9
TYPICAL PERFORMANCE CHARACTERISTICS
60
61
62
63
64
65
66
67
68
69
70
−50 −25 0 25 50 75 100 125
15
16
17
18
19
20
21
22
23
24
−50 −25 0 25 50 75 100 125
TEMPERATURE (°C)
R
FB(up)
(kW)
Figure 9. FB Pin Internal Pull−up Resistor
R
FB(up)
4.60
4.70
4.80
4.90
5.00
5.10
5.20
5.30
−50 −25 0 25 50 75 100 125
V
FB(ref)
(V)
TEMPERATURE (°C)
Figure 10. FB Pin Open Voltage V
FB(ref)
TEMPERATURE (°C)
f
OSC
(kHz)
Figure 11. Oscillator Frequency f
OSC
75
76
77
78
79
80
81
82
83
84
85
−50 −25 0 25 50 75 100 125
TEMPERATURE (°C)
D
MAX
(%)
Figure 12. Maximum Duty Cycle D
MAX
1.80
1.85
1.90
1.95
2.00
2.05
−50 −25 0 25 50 75 100 125
V
FB(foldS)
(V)
TEMPERATURE (°C)
Figure 13. FB Pin Voltage Below Which
Frequency Foldback Starts V
FB(foldS)
1.20
1.25
1.30
1.35
1.40
1.45
1.50
−50 −25 0 25 50 75 100 125
TEMPERATURE (°C)
V
FB(foldE)
(V)
Figure 14. FB Pin Voltage Below Which
Frequency Foldback is Complete V
FB(foldE)
2.10
2.15
2.20
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33

NCP1234BD100R2G

Mfr. #:
Buy NCP1234BD100R2G
Manufacturer:
ON Semiconductor
Description:
Switching Controllers Fixed Freq (I) Mode For FlyBk Conv
Lifecycle:
New from this manufacturer.
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