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NCP81243 Datasheet(PDF) 11 Page - ON Semiconductor

Part No. 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) 11 Page - ON Semiconductor

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NCP81243
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11
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
BIAS SUPPLY
VCC Quiescent Current
PS2
50
mA
VCC Quiescent Current
PS3
20
mA
VCC Quiescent Current
PS4 (25
°C only)
230
mA
VCC Quiescent Current
Enable low
45
mA
UVLO Threshold
VCC rising
4.5
V
VCC falling
4
VCC UVLO Hysteresis
200
mV
VRMP
Supply Range
4.5
20
V
UVLO Threshold
VRMP rising
4.2
V
VRMP falling
3
VCC UVLO Hysteresis
700
mV
DAC SLEW RATE
Soft Start Slew Rate
1/2 SR Fast
mv/
ms
Slew Rate Slow
1/2 SR Fast
mv/
ms
Slew Rate Fast
>10
mv/
ms
AUX Soft Start Slew Rate
1/2 SR Fast
mv/
ms
AUX Slew Rate Slow
1/2 SR Fast
mv/
ms
AUX Slew Rate Fast
>10
mv/
ms
ENABLE INPUT
Enable High Input Leakage Current
Enable = 0
−1
0
1.0
mA
Upper Threshold
VUPPER
0.8
V
Lower Threshold
VLOWER
0.3
V
Enable Delay Time
Measure time from Enable transitioning HI,
VBOOT is not 0 V
2.5
ms
DRON
Output High Voltage
Sourcing 500
mA
3.0
V
Output Low Voltage
Sinking 500
mA
0.1
V
Pull Up Resistances
2.0
k
W
Rise/Fall Time
CL (PCB) = 20 pF,
DVo = 10% to 90%
160
ns
Internal Pull Down Resistance
VCC = 0 V
70
k
W
IOUT /IOUTA OUTPUT
Input Referred Offset Voltage
Ilimit to CSREF
−3
+3
mV
Output current max
Ilimit sink current 80
mA
800
mA
Current Gain
(Iout current)/(Ilimit Current)
Rlim = 20 K, Riout = 5 K
DAC = 0.8 V, 1.25 V, 1.52 V
9.5
10
10.5
OSCILLATOR
Switching Frequency Range
300
1400
KHz
Switching Frequency Accuracy
300 KHz < Fsw < 1.4 MHz
−10
10
%
3 Phase Operation
350
390
430
kHz
OUTPUT OVER VOLTAGE & UNDER VOLTAGE PROTECTION (OVP & UVP)
Over Voltage Threshold During
Soft−Start
2.5
V


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