NCV8877
ELECTRICAL CHARACTERISTICS (−40°C < T < 150°C, 3.6 V < V
< 40 V, unless otherwise specified) Min/Max values are
J
OUT
guaranteed by test, design or statistical correlation.
Characteristic
GENERAL
Symbol
Conditions
Min
Typ
Max
Unit
Quiescent Current, Sleep Mode
Quiescent Current, No switching
I
V
= 13.2 V, T = 25°C, DISB = 0 V
−
−
12
14
mA
q,sleep
OUT
J
I
Into V
pin, VOUT,reg < V <
OUT
2.2
4.0
mA
q,off
OUT
VOUT,des, No switching
OSCILLATOR
Switching Frequency
F
153
−
−
501
−
kHz
V
SW
R
Voltage
V
ROSC
1.0
170
OSC
Switching Frequency
Default Switching
F
F
ROSC = Open
153
187
187
kHz
kHz
SW
ROSC = Open
ROSC = 100 kW
ROSC = 20 kW
ROSC = 10 kW
153
180
283
409
170
200
315
455
SW
220
347
501
Minimum Pulse Width
t
NCV887700
NCV887701
NCV887711
NCV887720
NCV887721
NCV887740
90
90
89
90
90
90
115
115
115
115
115
115
145
145
146
145
145
145
ns
on,min
Maximum Duty Cycle
D
ROSC = OPEN
81
83
85
%
max
Slope Compensating Ramp
(Note 2)
S
a
NCV887700
NCV887701
NCV887711
NCV887720
NCV887721
NCV887740
30
46
45
46
46
46
34
53
53
53
53
53
38
60
61
60
60
60
mV/ ms
DISABLE
DISB Pull−down Current (Note 2)
DISB Input High Voltage
DISB Input High Voltage Hysteresis
DISB Input Low Voltage
CURRENT SENSE AMPLIFIER
Low−Frequency Gain
I
V
= 5 V
−
2.0
−
0.6
−
1.0
5.0
−
mA
V
DIS
DIS
V
d,ih
V
d,hys
500
−
mV
mV
V
0
800
d,il
A
Input−to−output gain at dc, ISNS ≤ 1 V
Gain of A − 3 dB
0.9
2.5
−
1.0
−
1.1
−
V/V
MHz
mA
csa
Bandwidth
BW
csa
sns,bias
csa
ISNS Input Bias Current
Current Limit Threshold Voltage
I
Out of ISNS pin
30
50
V
Voltage on ISNS pin
NCV887700
NCV887701
NCV887711
NCV887720
NCV887721
NCV887740
360
180
180
180
180
180
400
200
200
200
200
200
440
220
220
220
220
220
mV
cl
Current Limit, Response Time (Note
2)
t
CL tripped until GDRV falling edge,
= V (typ) + 60 mV
−
125
−
80
150
80
125
175
125
ns
%
cl
V
ISNS
cl
Overcurrent Protection,
Threshold Voltage
%V
Percent of V
cl
ocp
Overcurrent Protection,
Response Time (Note 2)
t
From overcurrent event, Until switching
stops, V = V + 40 mV
ns
ocp
ISNS
OCP
VOLTAGE ERROR OPERATIONAL TRANSCONDUCTANCE AMPLIFIER
Transconductance 100 mV
g
m,vea
V
OUT
=
0.8
1.2
1.63
mS
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
2. Not tested in production. Limits are guaranteed by design.
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