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NCP81243 Datasheet(PDF) 12 Page - ON Semiconductor

Part # NCP81243
Description  Dual Output 3 & 2 Phase Controller
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP81243 Datasheet(HTML) 12 Page - ON Semiconductor

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NCP81243
www.onsemi.com
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Table 4. NCP81243 (3+2) ELECTRICAL CHARACTERISTICS
Unless otherwise stated: −40
°C < TA < 100°C; 4.75 V < VCC < 5.25 V; CVCC = 0.1 mF
Parameter
Unit
Max
Typ
Min
Test Conditions
OUTPUT OVER VOLTAGE & UNDER VOLTAGE PROTECTION (OVP & UVP)
Over Voltage Threshold Above DAC
VSS rising
375
400
425
mV
Over Voltage Delay
VSS rising to PWMx low
50
ns
Under Voltage Threshold Below
DAC−DROOP
VSS falling
275
300
325
mV
Under−voltage Hysteresis
VSS rising
25
mV
Under−Voltage Delay
5
mS
OVERCURRENT PROTECTION
ILIM Threshold Current
(OCP shutdown after 50 us delay)
Main Rail, Rlim = 20 k
W
8.0
10
12
mA
ILIM Threshold Current
(immediate OCP shutdown)
Main Rail, Rlim = 20 k
13
15
16.5
mA
ILIM Threshold Current
(OCP shutdown after 50
ms delay)
Main Rail, RLIM = 20 K
(N = number of phases in PS0 mode)
10/N
mA
ILIM Threshold Current
(immediate OCP shutdown)
Main Rail, RLIM = 20 K
(N= number of phases in PS0 mode)
15/N
mA
ILIM Threshold Current
(OCP shutdown after 50
ms delay)
Auxiliary Rail, Rlim = 20 k
8.0
10
11
mA
ILIM Threshold Current
(immediate OCP shutdown)
Auxiliary Rail, Rlim = 20 k
13
15
16.5
mA
ILIM Threshold Current
(OCP shutdown after 50
ms delay)
Auxiliary Rail RLIM = 20 K
10/N
mA
ILIM Threshold Current
(immediate OCP shutdown)
Auxiliary Rail, RLIM = 20 K
15/N
mA
MODULATORS (PWM COMPARATORS) FOR MAIN RAIL & AUXILIARY RAIL
Minimum Pulse Width
Fsw = 350 KHz
60
ns
0% Duty Cycle
COMP voltage when the PWM outputs
remain LO
1.3
V
100% Duty Cycle
COMP voltage when the PWM outputs
remain HI VRMP = 12.0 V
2.5
V
PWM Ramp Duty Cycle Matching
COMP = 2 V, PWM Ton matching
1
%
PWM Phase Angle Error
Between adjacent phases
±5
deg
Ramp Feed−forward Voltage range
4.5
20
V
TSENSE/TSENSEA
VRHOT Assert Threshold
440
mV
VRHOT Rising Threshold
460
mV
Alert Rising Threshold
480
mV
Alert Assertion Threshold
460
mV
TSENSE Bias Current
−57.5
−60
−62.5
mA
VRHOT
Output Low Voltage
0.3
V
Output Leakage Current
High Impedance State
−1.0
1.0
mA
ADC
Voltage Range
0
2
V
Total Unadjusted Error (TUE)
−1.25
+1.25
%
Differential Nonlinearity (DNL)
8−bit
1
LSB
Power Supply Sensitivity
±1
%
Conversion Time
30
ms


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