NCV8871
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4
ELECTRICAL CHARACTERISTICS (−40°C < T
J
< 150°C, 3.2 V < V
IN
< 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
I
q,sleep
V
IN
= 13.2 V, EN = 0, T
J
= 25°C − 2.0 −
mA
Quiescent Current, Sleep Mode I
q,sleep
V
IN
= 13.2 V, EN = 0, −40°C < T
J
< 125°C − 2.0 6.0
mA
Quiescent Current, No switching I
q,off
Into VIN pin, EN = 1, No switching − 1.5 2.5 mA
Quiescent Current, Switching,
normal operation
I
q,on
Into VIN pin, EN = 1, Switching − 3.0 6.0 mA
OSCILLATOR
Minimum pulse width
t
on,min
90 115 140 ns
Maximum duty cycle D
max
NCV887100
NCV887101
NCV887102
NCV887103
NCV887104
86
84
89
91
91
88
86
91
93
93
90
88
93
95
95
%
Switching frequency f
s
NCV887100
NCV887101
NCV887102
NCV887103
NCV887104
153
900
900
306
306
170
1000
1000
340
340
187
1100
1100
374
374
kHz
Soft−start time t
ss
From start of switching with V
FB
= 0 until
reference voltage = V
REF
NCV887100
NCV887101
NCV887102
NCV887103
NCV887104
6.0
1.0
1.0
3.0
3.0
7.4
1.25
1.25
3.7
3.7
8.8
1.5
1.5
4.4
4.4
ms
Soft−start delay t
ss,dly
From EN → 1 until start of switching with
V
FB
= 0 − 240 280
ms
Slope compensating ramp S
a
NCV887100
NCV887101
NCV887102
NCV887103
NCV887104
46
13
46
46
46
53
16
53
53
53
60
19
60
60
60
mV/ms
ENABLE/SYNCHRONIZATION
EN/SYNC pull−down current
I
EN/SYNC
V
EN/SYNC
= 5 V − 5.0 10
mA
EN/SYNC input high voltage V
s,ih
V
IN
> V
UVLO
2.0 − 5.0 V
EN/SYNC input low voltage V
s,il
0 − 800 mV
EN/SYNC time−out ratio %t
en
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 %f
sync,min
Percent of f
s
− − 80 %
SYNC maximum frequency f
sync,max
1.1 − − MHz
Synchronization delay t
s,dly
From SYNC falling edge to GDRV falling
edge under open loop conditions
− 50 100 ns
Synchronization duty cycle D
sync
25 − 75 %
CURRENT SENSE AMPLIFIER
Low−frequency gain
A
csa
Input−to−output gain at dc, ISNS v 1 V 0.9 1.0 1.1 V/V
Bandwidth BW
csa
Gain of A
csa
− 3 dB 2.5 − − MHz
ISNS input bias current I
sns,bias
Out of ISNS pin − 30 50
mA
