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NCP81243 Datasheet(PDF) 8 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) 8 Page - ON Semiconductor

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NCP81243
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Table 1. QFN52 PIN LIST DESCRIPTION
Pin No.
Description
Symbol
27
VBOOTA/ADDRA
VBOOT and Address AUX rail Input Pin. A resistor to ground on startup is used to VBOOT and
address of the auxiliary rail
28
VBOOT/ADDR
VBOOT and Address main rail Input Pin. A resistor to ground on startup is used to VBOOT and
address of the main rail
29
ICCMAXA
ICCMAX Input for auxiliary rail Pin. During start up it is used to program configuration of Internal
register with a resistor to ground
30
PWM1A
PWM 1 Auxiliary rail output.
30
PWM1A
PWM 1 Auxiliary rail output. ICCMAX Input for auxiliary rail Pin.
31
PWM2A
PWM 2 Auxiliary rail output.
32
PWM3
PWM 3 Main rail output.
33
PWM2
PWM 2 Main rail output.
34
PWM1
PWM 1 Main output.
35
DRVON
Bidirectional gate driver enable for external drivers for both Main and Auxiliary Rails. It should be
left floating if unused.
36
ICCMAX
ICCMAX Main rail Input Pin. During start up it is used to program configuration of Internal register
with a resistor to ground
37
Tsense
Temp Sense input for main rail
38
CSN1
Non−inverting input to current balance sense amplifier for Main Rail phase 1
39
CSP1
Non−inverting input to current balance sense amplifier for Main Rail phase 1
40
CSN2
Non−inverting input to current balance sense amplifier for Main rail phase 2
41
CSP2
Non−inverting input to current balance sense amplifier for Main Rail phase 2
42
CSN3
Non−inverting input to current balance sense amplifier for Main Rail phase 2
43
CSP3
Non−inverting input to current balance sense amplifier for Main Rail phase 2
44
CSREF
Total output current sense amplifier reference voltage input for Main Rail
45
CSSUM
Inverting input of total current sense amplifier for Main Rail output
46
ILIM
Over current shutdown threshold setting for Main Rail output. Resistor to CSCOMP to set threshold.
47
CSCOMP
Output of total current sense amplifier for Main Rail output
48
COMP
Output of the Main Rail error amplifier and the inverting input of the PWM comparator for Main
Rail output
49
FB
Error amplifier voltage feedback for Main Rail output
50
DIFF
Output of the Main Rail differential remote sense amplifier.
51
VSP
Differential Output Voltage Sense Positive for mail rail
52
VSN
Differential Output Voltage Sense Negative for main rail
53
AGND


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