ADP3212 查看數據表（PDF） - ON Semiconductor
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ADP3212 Datasheet PDF : 35 Pages
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ADP3212, NCP3218, NCP3218G
ELECTRICAL CHARACTERISTICS
VCC = PVCC = 5.0 V, FBRTN = PGND = GND = 0 V, H = 5.0 V, L = 0 V, EN = VARFREQ = H, DPRSLP = L, PSI = 1.05 V,
VVID = VDAC = 1.2000 V, TA = −40°C to 100°C, unless otherwise noted. (Note 1) Current entering a pin (sink current) has a positive sign.
Parameter
Symbol
Conditions
Min
Typ
Max Units
CURRENT MONITOR
Current Gain Accuracy
IMON Clamp Voltage
PULSE WIDTH MODULATOR
CLOCK OSCILLATOR
IMON/ILIM
VMAXMON
Measured from ILIM to IMON
ILIM = −20 mA
ILIM = −10 mA
ILIM = −5 mA
Relative to FBRTN, ILIMP = −30 mA
−
3.7
4.0
4.3
3.6
4.0
4.4
3.5
4.0
4.5
1.0
1.15
V
RT Voltage
PWM Clock Frequency Range
(Note 2)
VRT
VARFREQ = high, RT = 125 kW,
VVID = 1.5000 V
VARFREQ = low
See also VRT(VVID) formula
fCLK
Operation of interest
V
1.125 1.25 1.375
0.9
1.0
1.1
0.3
3.0
MHz
PWM Clock Frequency
RAMP GENERATOR
fCLK
TA = +25°C, VVID = 1.2000 V
RT = 72 kW
RT = 120 kW
RT = 180 kW
kHz
1100 1257 1400
700
800
900
500
550
600
RAMP Voltage
RAMP Current Range (Note 2)
VRAMP
IRAMP
EN = high, IRAMP = 60 mA
EN = low
EN = high
EN = low, RAMP = 19 V
0.9
1.0
1.1
V
VIN
1.0
100
mA
−1.0
+1.0
PWM COMPARATOR
PWM Comparator Offset (Note 2)
RPM COMPARATOR
VOSRPM
VRAMP − VCOMP
±3.0
mV
RPM Current
RPM Comparator Offset (Note 2)
EPWM CLOCK SYNC
IRPM
VOSRPM
VVID = 1.2 V, RT = 215 kW
See also IRPM(RT) formula
VCOMP − (1 + VRPMTH)
−9.0
mA
±3.0
mV
Trigger Threshold (Note 2)
Relative to COMP sampled TCLK time
earlier
3−phase configuration
2−phase configuration
1−phase configuration
mV
350
400
450
TRDET
Trigger Threshold (Note 2)
Relative to COMP sampled TCLK time
earlier
3−phase configuration
2−phase configuration
1−phase configuration
mV
−450
−500
−600
TRDET Low Voltage (Note 2)
TRDET Leakage Current
SWITCH AMPLIFIER
VLTRDET
IHTRDET
Logic low, ITRDETsink = 4 mA
Logic high, VTRDET = VCC
30
300
mV
5.0
mA
SW Common Mode Range
(Note 2)
VSW(X)CM
Operation of interest for current sensing −600
+200 mV
SWFB Input Resistance
RSW(X)
ZERO CURRENT SWITCHING COMPARATOR
SWX = 0 V, SWFB = 0 V
20
35
50
kW
SW ZCS Threshold
VDCM(SW1)
DCM mode, DPRSLP = 3.3 V
−6.0
mV
1. All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
2. Guaranteed by design or bench characterization, not production tested.
3. Based on bench characterization data.
4. Timing is referenced to the 90% and 10% points, unless otherwise noted.
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