NCV887001 Просмотр технического описания (PDF) - ON Semiconductor
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NCV887001 Datasheet PDF : 11 Pages
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NCV8870
ELECTRICAL CHARACTERISTICS (−40°C < TJ < 150°C, 3.2 V < VIN < 40 V, unless otherwise specified) Min/Max values are
guaranteed by test, design or statistical correlation.
Characteristic
Symbol
Conditions
Min Typ Max Unit
GENERAL
Quiescent Current, Sleep Mode
Quiescent Current, Sleep Mode
Quiescent Current, No switching
Quiescent Current, Switching,
normal operation
Iq,sleep
Iq,sleep
Iq,off
Iq,on
VIN = 13.2 V, EN = 0, TJ = 25°C
VIN = 13.2 V, EN = 0, −40°C < TJ < 125°C
Into VIN pin, EN = 1, No switching
Into VIN pin, EN = 1, Switching
−
2.0
−
mA
−
2.0
6.0
mA
−
1.5
2.5
mA
−
3.0
6.0
mA
OSCILLATOR
Minimum pulse width
Maximum duty cycle
ton,min
Dmax
NCV887000
NCV887001
200 250 300
ns
91
93
95
%
91
93
95
Switching frequency
fs
NCV887000
NCV887001
45
50
55
kHz
90
100 110
Soft−start time
tss
From start of switching with VFB = 0 until
ms
reference voltage = VREF
NCV887000
21
26
31
NCV887001
10.5
13
15.5
Soft−start delay
Slope compensating ramp
tss,dly
Sa
From EN → 1 until start of switching with
VFB = 0
NCV887000
NCV887001
ms
−
720 840
12
15
18 mV/ms
28
33
38
ENABLE/SYNCHRONIZATION
EN/SYNC pull−down current
EN/SYNC input high voltage
EN/SYNC input low voltage
EN/SYNC time−out ratio
IEN/SYNC
VEN/SYNC = 5 V
−
5.0
10
mA
Vs,ih
2.0
−
5.0
V
Vs,il
0
−
800
mV
%ten
From SYNC falling edge, to oscillator con-
−
trol (EN high) or shutdown (EN low), Per-
cent of typical switching period
−
350
%
SYNC minimum frequency ratio
SYNC maximum frequency
Synchronization delay
%fsync,min
fsync,max
ts,dly
Percent of fs
From SYNC falling edge to GDRV falling
edge
−
−
80
%
1.1
−
−
MHz
−
50
100
ns
Synchronization duty cycle
CURRENT SENSE AMPLIFIER
Dsync
25
−
75
%
Low−frequency gain
Bandwidth
ISNS input bias current
Current limit threshold voltage
Acsa
BWcsa
Isns,bias
Vcl
Input−to−output gain at dc, ISNS v 1 V
Gain of Acsa − 3 dB
Out of ISNS pin
Voltage on ISNS pin
NCV887000
NCV887001
0.9
1.0
1.1
V/V
2.5
−
−
MHz
−
30
50
mA
mV
360 400 440
360 400 440
Current limit,
Response time
Overcurrent protection,
Threshold voltage
tcl
%Vocp
CL tripped until GDRV falling edge,
VISNS = Vcl + 40 mV
Percent of Vcl
−
80
125
ns
125 150 175
%
Overcurrent protection,
Response Time
tocp
From overcurrent event, Until switching
stops, VISNS = VOCP + 40 mV
−
80
125
ns
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