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NCP81274MNTXG

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
NCP81274
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4
Table 1. PIN FUNCTION DESCRIPTION
Pin
Number
Pin
Name
Pin
Type
Description
1 REFIN I Reference voltage input for output voltage regulation.
2 VREF O 2.0 V output reference voltage. A 10 nF ceramic capacitor is required to connect this pin
to ground.
3 VRMP I Feed-forward input of VIN for the ramp slope compensation. The current fed into this pin
is used to control of the ramp of PWM slope.
4 PWM8/SS I/O PWM 8 output/Soft Start setting. During startup it is used to program the soft start time
with a resistor to ground.
5 PWM7/OCP I/O PWM 7 output/Per OCP setting. During startup it is used to program the OCP level per
phase and latch off time with a resistor to ground.
6 PWM6/LPC1 I/O PWM 6 output/Low phase count 1. During startup it is used to program the power zone
(PSI set low) with a resistor to ground.
7 PWM5/LPC2 I/O PWM 5 output/Low phase count 2. During startup it is used to program boot-up power
zone (PSI set low) with a resistor to ground.
8 PWM4/PHTH1 I/O PWM 4 output/Phase Shedding Threshold 1. During startup it is used to program the
phase shedding threshold 1 (PSI set to mid state) with a resistor to ground.
9 PWM3/PHTH2 I/O PWM 3 output/Phase Shedding Threshold 2. During startup it is used to program the
phase shedding threshold 2 (PSI set to mid state) with a resistor to ground.
10 PWM2/PHTH3 I/O PWM 2 output/Phase Shedding Threshold 3. During startup it is used to program the
phase shedding threshold 3 (PSI set to mid state) with a resistor to ground.
11 PWM1/PHTH4 I/O PWM 1 output/Phase Shedding Threshold 4. During startup it is used to program the
phase shedding threshold 4 (PSI set to mid state) with a resistor to ground.
12 DRON I/O Bidirectional gate driver enable for external drivers.
13 CSP8 I Non-inverting input to current balance sense amplifier for phase 8. Pull-up to VCC to
disable the PWM8 output.
14 CSP7 I Non-inverting input to current balance sense amplifier for phase 7. Pull-up to VCC to
disable the PWM7 output.
15 CSP6 I Non-inverting input to current balance sense amplifier for phase 6. Pull-up to VCC to
disable the PWM6 output.
16 CSP5 I Non-inverting input to current balance sense amplifier for phase 5. Pull-up to VCC to
disable the PWM5 output.
17 CSP4 I Non-inverting input to current balance sense amplifier for phase 4. Pull-up to VCC to
disable the PWM4 output.
18 CSP3 I Non-inverting input to current balance sense amplifier for phase 3. Pull-up to VCC to
disable the PWM3 output.
19 CSP2 I Non-inverting input to current balance sense amplifier for phase 2. Pull-up to VCC to
disable the PWM2 output.
20 CSP1 I Non-inverting input to current balance sense amplifier for phase 1. Pull-up to VCC to
disable the PWM1 output.
21 CSREF I Total output current sense amplifier reference voltage input.
22 CSSUM I Inverting input of total current sense amplifier.
23 CSCOMP O Output of total current sense amplifier.
24 ILIM O Over current shutdown threshold setting output. The threshold is set by a resistor
between ILIM and to CSCOMP pins.
25 IOUT O Total output current. A resistor to GND is required to provide a voltage drop of 2 V at the
maximum output current.
26 LLTH/I2C_ADD I Load line selection from 0% to 100% and I
2
C address pin.
27 FSW I Resistor to ground form this pin sets the operating frequency of the regulator.
28 DIFF O Output of the regulators differential remote sense amplifier.
NCP81274
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Table 1. PIN FUNCTION DESCRIPTION (continued)
Pin
Number
Description
Pin
Type
Pin
Name
29 FB I Error amplifier inverting (feedback) input.
30 COMP O Output of the error amplifier and the inverting input of the PWM comparator.
31 VSP I Differential Output Voltage Sense Positive terminal.
32 VSN I Differential Output Voltage Sense Negative terminal.
33 VCC I
Power for the internal control circuits. A 1 mF decoupling capacitor is requires from this
pin to ground.
34 SDA I/O Serial Data bi-directional pin, requires pull-up resistor to VCC.
35 SCL I Serial Bus clock pin, requires pull-up resistor to VCC.
36 EN I Logic input. Logic high enables regulator output logic low disables regulator output.
37 PSI I Power Saving Interface control pin. This pin can be set low, high or left floating.
Use a current limiting resistor of 100 kW when driving the pin with 5 V logic.
38 PGOOD O Open Drain power good indicator.
39 PWM_VID I PWM_VID buffer input.
40 VID_BUFF O PWM_VID pulse output from internal buffer.
41 AGND GND Analog ground and thermal pad, connected to system ground.
Table 2. MAXIMUM RATINGS
Rating
Pin Symbol Min Typ Max Unit
Pin Voltage Range (Note 1)
VSN GND−0.3 GND + 0.3 V
VCC −0.3 6.5 V
VRMP −0.3 25 V
PWM_VID −0.3
(−2, < 50 ns)
VCC + 0.3 V
All Other Pins
with the
exception of
the DRON Pin
−0.3 VCC + 0.3 V
Pin Current Range
COMP
−2 2 mA
CSCOMP
DIFF
PGOOD
VSN −1 1 mA
Moisture Sensitivity Level MSL 1 −
Lead Temperature Soldering Reflow (SMD Styles Only),
Pb-Free Versions (Note 2)
T
SLD
260 °C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. All signals referenced to GND unless noted otherwise.
2. For information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D
.
NCP81274
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Table 3. THERMAL CHARACTERISTICS
Rating
Symbol Min Typ Max Unit
Thermal Characteristics, (QFN40, 5 × 5 mm)
Thermal Resistance, Junction-to-Air (Note 1)
R
θJA
− 68 −
°C/W
Operating Junction Temperature Range (Note 2) T
J
−40 − 150
_C
Operating Ambient Temperature Range T
A
−10 − 100
_C
Maximum Storage Temperature Range T
STG
−55 − 150
_C
1. JESD 51−5 (1S2P Direct-Attach Method) with 0 LFM.
2. JESD 51−7 (1S2P Direct-Attach Method) with 0 LFM.
Table 4. ELECTRICAL CHARACTERISTICS
(Unless otherwise stated: −10°C < T
A
< 100°C; 4.6 V < VCC < 5.4 V; C
VCC
= 0.1 mF)
Parameter
Test Conditions Symbol Min Typ Max Unit
VRMP
Supply Range
VRMP 4.5 20 V
UVLO
VRMP Rising V
RMPrise
4.2 V
VRMP Falling V
RMPfall
3 V
VRMP UVLO Hysteresis V
RMPhyst
800 mV
BIAS SUPPLY
Supply Voltage Range
VCC 4.6 5.4 V
VCC Quiescent current
Enable Low
ICC
40
mA
8 Phase Operation 50 mA
1 Phase-DCM Operation 10 mA
UVLO Threshold
VCC Rising UVLO
Rise
4.5 V
VCC Falling UVLO
Fall
4 V
VCC UVLO Hysteresis UVLO
Hyst
200 mV
SWITCHING FREQUENCY
Switching Frequency Range
8 Phase Configuration F
SW
250 1200 kHz
Switching Frequency Accuracy F
SW
= 810 kHz
DF
SW
−4 +4 %
ENABLE INPUT
Input Leakage
EN = 0 V or VCC I
L
−1.0 1.0
mA
Upper Threshold V
IH
1.2 V
Lower Threshold V
IL
0.6 V
DRON
Output High Voltage
Sourcing 500 mA
V
OH
3.0 V
Output Low Voltage
Sinking 500 mA
V
OL
0.1 V
Rise Time
Cl(PCB) = 20 pF,
DV
O
= 10% to 90%
t
R
160 ns
Fall Time
Cl(PCB) = 20 pF,
DV
O
= 10% to 90%
t
F
3 ns
Internal Pull-up Resistance R
PULL−UP
2.0
kW
Internal Pull-down Resistance VCC = 0 V R
PULL_DOWN
70
kW
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

NCP81274MNTXG

Mfr. #:
Buy NCP81274MNTXG
Manufacturer:
ON Semiconductor
Description:
Motor / Motion / Ignition Controllers & Drivers 8 PHASE CONTROLLER
Lifecycle:
New from this manufacturer.
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