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NCP81243 Datasheet(PDF) 14 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) 14 Page - ON Semiconductor

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NCP81243
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14
Table 5. STATE TRUTH TABLE
STATE
VR_RDY Pin
Error AMP
Comp Pin
OVP & UVP
DRON PIN
Method of Reset
POR
0<VCC<UVLO
N/A
N/A
N/A
Resistive pull down
Disabled
EN < threshold
UVLO >threshold
Low
Low
Disabled
Low
Start up Delay &
Calibration
EN> threshold
UVLO>threshold
Low
Low
Disabled
Low
DRON Fault
EN> threshold
UVLO>threshold
DRON<threshold
Low
Low
Disabled
Resistive pull up
Driver must release
DRON to high
Soft Start
EN > threshold
UVLO >threshold
DRON > High
Low
Operational
Active / No latch
High
Normal Operation
EN > threshold
UVLO >threshold
DRON > High
High
Operational
Active / Latching
High
N/A
Over Voltage
Low
N/A
DAC+OVP
High
Over Current
Low
Operational
Last DAC Code
Low
VOUT = 0 V
Low: if
Reg34h:bit0=0;
High:if
Reg34h:bit0=1;
Clamped at 0.9 V
Disabled
High,
PWM outputs in
low state


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