NCP1612B Ver la hoja de datos (PDF) - ON Semiconductor
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NCP1612B Datasheet PDF : 31 Pages
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NCP1612A, NCP1612B, NCP1612A1, NCP1612A2, NCP1612A3, NCP1612B2
Table 3. TYPICAL ELECTRICAL CHARACTERISTICS (continued)
(Conditions: VCC = 15 V, TJ from −40°C to +125°C, unless otherwise specified)
Symbol
Rating
REGULATION BLOCK
VREF
Feedback Voltage Reference:
@ 25°C
Over the temperature range
IEA
Error Amplifier Current Capability
GEA
Error Amplifier Gain
VCONTROL
VCONTROL Pin Voltage:
−VCONTROLMAX − @ VFB = 2 V
−VCONTROLMIN − @ VFB = 3 V
VOUTL/VREF Ratio (VOUT Low Detect Threshold/VREF) (guaranteed by design)
HOUTL/VREF Ratio (VOUT Low Detect Hysteresis/VREF) (guaranteed by design)
IBOOST
VCONTROL Pin Source Current when (VOUT Low Detect) is activated
CURRENT SENSE AND ZERO CURRENT DETECTION BLOCKS
VCS(th)
TLEB,OCP
TLEB,OVS
TOCP
VZCD(th)H
VZCD(th)L
VZCD(hyst)
RZCD/CS
VCL(pos)
IZCD(bias)
IZCD(bias)
TZCD
TSYNC
TWDG
TWDG(OS)
TTMO
IZCD(gnd)
STATIC OVP
Current Sense Voltage Reference
Over-current Protection Leading Edge Blanking Time (guaranteed by design)
“OverStress” Leading Edge Blanking Time (guaranteed by design)
Over-current Protection Delay from VCS/ZCD > VCS(th) to DRV low
(dVCS/ZCD / dt = 10 V/ms)
Zero Current Detection, VCS/ZCD rising
Zero Current Detection, VCS/ZCD falling
Hysteresis of the Zero Current Detection Comparator
VZCD(th)H over VCS(th) Ratio
CS/ZCD Positive Clamp @ ICS/ZCD = 5 mA
Current Sourced by the CS/ZCD Pin, VCS/ZCD = VZCD(th)H
Current Sourced by the CS/ZCD Pin, VCS/ZCD = VZCD(th)L
(VCS/ZCD < VZCD(th)L) to (DRV high)
Minimum ZCD Pulse Width
Watch Dog Timer
Watch Dog Timer in “Overstress” Situation
Time-out Timer
Source Current for CS/ZCD pin impedance Testing
DMIN
Duty Cycle, VFB = 3 V, Vcontrol pin open
ON-TIME CONTROL
TON(LL)
Maximum On Time, Vsense = 1.4 V and Vcontrol maximum (CrM)
TON(LL)2
On Time, Vsense = 1.4 V and Vcontrol = 2.5 V (CrM)
TON(HL)
Maximum On Time, Vsense = 2.8 V and Vcontrol maximum (CrM)
TON(LL)(MIN) Minimum On Time, Vsense = 1.4 V (not tested, guaranteed by characterization)
TON(HL)(MIN) Minimum On Time, Vsense = 2.8 V (not tested, guaranteed by characterization)
FEED-BACK OVER AND UNDER-VOLTAGE PROTECTION (SOFT OVP AND UVP)
RsoftOVP
Ratio (soft OVP Threshold, VFB rising) over VREF (VsoftOVP/VREF)
(guaranteed by design)
RsoftOVP(HYST)
RUVP
Ratio (Soft OVP Hysteresis) over VREF (guaranteed by design)
Ratio (UVP Threshold, VFB rising) over VREF (VUVP/VREF)
(guaranteed by design)
RUVP(HYST)
(IB)FB
Ratio (UVP Hysteresis) over VREF (guaranteed by design)
FB Pin Bias Current @ VFB = VsoftOVP and VFB = VUVP
Min
2.44
2.42
−
110
−
−
95.0
−
180
450
100
50
−
675
200
375
1.4
−
0.5
0.5
−
−
80
400
20
−
−
22.0
10.5
7.3
−
−
104
1.5
8
−
50
Typ
2.50
2.50
±20
220
4.5
0.5
95.5
−
220
500
200
100
40
750
250
500
1.5
15.6
−
−
60
110
200
800
30
250
−
25.0
12.5
8.5
−
−
105
2.0
12
−
200
Max
2.54
2.54
−
290
−
−
96.0
0.5
250
550
350
170
200
825
300
−
1.6
−
2.0
2.0
200
200
320
1200
50
−
0
29.0
14.0
9.6
200
100
106
2.5
16
1
450
Unit
V
mA
mS
V
%
%
mA
mV
ns
ns
ns
mV
mV
mV
−
V
mA
mA
ns
ns
ms
ms
ms
mA
%
ms
ms
ms
ns
ns
%
%
%
%
nA
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