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NCP81232 Datasheet(PDF) 3 Page - ON Semiconductor

Part # NCP81232
Description  Dual-Channel/Multi-Phase Controller
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP81232 Datasheet(HTML) 3 Page - ON Semiconductor

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NCP81232
www.onsemi.com
3
PIN DESCRIPTION
Pin
Description
Type
Name
14
OTP2
/REFIN
Analog Input
Over Temperature Protection 2 / Reference Input. Voltage at this pin sets
over−temperature threshold for channel 2. Reference input pin in DDR mode.
15
COMP2
Analog Output
Compensation 2. Output pin of error amplifier of channel 2.
16
FB2
Analog Input
Feedback 2. Inverting input of internal error amplifier for channel 2.
17
DIFFOUT2
Analog Output
Differential Amplifier Output 2. Output pin of differential voltage sense amplifier of
channel 2.
18
VSN2
Analog Input
Voltage Sense Negative Input 2. Inverting input of differential voltage sense amplifier of
channel 2.
19
VSP2
Analog Input
Voltage Sense Positive Input 2. Non−inverting input of differential voltage sense amplifier
of channel 2.
20
PWM4
Analog Output
PWM 4. PWM output of phase 4.
21
ISN4
Analog Input
Current Sense Negative Input 4. Inverting input of differential current sense amplifier of
phase 4.
22
ISP4
Analog Input
Current Sense Positive Input 4. Non−inverting input of differential current sense amplifier
of phase 4.
23
ISN3
Analog Input
Current Sense Negative Input 3. Inverting input of differential current sense amplifier of
phase 3.
24
ISP3
Analog Input
Current Sense Positive Input 3. Non−inverting input of differential current sense amplifier
of phase 3.
25
PWM3
Analog Output
PWM 3. PWM output of phase 3.
26
PWM2
Analog Output
PWM 2. PWM output of phase 2.
27
ISN2
Analog Input
Current Sense Negative Input 2. Inverting input of differential current sense amplifier of
phase 2.
28
ISP2
Analog Input
Current Sense Positive Input 2. Non−inverting input of differential current sense amplifier
of phase 2.
29
ISN1
Analog Input
Current Sense Negative Input 1. Inverting input of differential current sense amplifier of
phase 1.
30
ISP1
Analog Input
Current Sense Positive Input 1. Non−inverting input of differential current sense amplifier
of phase 1.
31
PWM1
Analog Output
PWM 1. PWM output of phase 1.
32
VSP1
Analog Input
Voltage Sense Positive Input 1. Non−inverting input of differential voltage sense amplifier
of channel 1.
33
VSN1
Analog Input
Voltage Sense Negative Input 1. Inverting input of differential voltage sense amplifier of
channel 1.
34
DIFFOUT1
Analog Output
Differential Amplifier Output 1. Output pin of differential voltage sense amplifier of
channel 1.
35
FB1
Analog Input
Feedback 1. Inverting input of internal error amplifier for channel 1.
36
COMP1
Analog Output
Compensation 1. Output pin of error amplifier of channel 1.
37
OTP1
Analog Input
Over Temperature Protection 1. Voltage at this pin sets over−temperature threshold for
channel 1.
38
ILIMT1
Analog Input
Limit of Current 1. Voltage at this pin sets over−current threshold for channel 1.
39
VREF
Analog Output
Output of Reference. Output of 0.6 V reference. A 10nF ceramic capacitor bypasses this
input to GND. This capacitor should be placed as close as possible to this pin.
40
VCC5V
Analog Power
Voltage Supply of Controller. Output of integrated 5.35V LDO and power supply input pin
of control circuits. A 4.7
mF ceramic capacitor bypasses this input to GND. This capacitor
should be placed as close as possible to this pin.
41
THERM
/GND
Analog Ground
Thermal Pad and Analog Ground. Ground of internal control circuits. Must be connected to
the system ground.


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