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NCV3843BVDR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
NCV3843BV
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (V
CC
= 15 V [Note 7], R
T
= 10 k, C
T
= 3.3 nF. For typical values T
A
= 25°C, for min/max values
T
A
is the operating ambient temperature range that applies [Note 8], unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
OUTPUT SECTION
Output Voltage
Low State (I
Sink
= 20 mA)
(I
Sink
= 200 mA)
High State (I
Source
= 20 mA)
(I
Source
= 200 mA)
V
OL
V
OH
−
−
12.9
12
0.1
1.6
13.5
13.4
0.4
2.3
−
−
V
Output Voltage with UVLO Activated (V
CC
= 6.0 V, I
Sink
= 1.0 mA) V
OL(UVLO)
− 0.1 1.1 V
Output Voltage Rise Time (C
L
= 1.0 nF, T
J
= 25°C) t
r
− 50 150 ns
Output Voltage Fall Time (C
L
= 1.0 nF, T
J
= 25°C) t
f
− 50 150 ns
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold (V
CC
) V
th
7.8 8.4 9.0 V
Minimum Operating Voltage After Turn−On (V
CC
) V
CC(min)
7.0 7.6 8.2 V
PWM SECTION
Duty Cycle
Maximum
Minimum
DC
(max)
DC
(min)
93
−
96
−
−
0
%
TOTAL DEVICE
Power Supply Current
Startup (V
CC
14 V) (Note 7)
I
CC
+ I
C
− 12 17
mA
Power Supply Zener Voltage (I
CC
= 25 mA) V
Z
30 36 − V
7. Adjust V
CC
above the Startup threshold before setting to 15 V.
8. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
NCV3843BV: T
low
= −40°C, T
high
= +125°C. Guaranteed by design.
NCV prefix is for automotive and other applications requiring site and change control.
NCV3843BV
http://onsemi.com
5
0.8
2.0
5.0
8.0
20
50
80
R
T
, TIMING RESISTOR (k )
Ω
1.0 M500 k200 k100 k50 k20 k10 k
f
OSC
, OSCILLATOR FREQUENCY (kHz)
V
CC
= 15 V
T
A
= 25°C
Figure 2. Timing Resistor
versus Oscillator Frequency
Figure 3. Output Deadtime
versus Oscillator Frequency
1.0 M500 k200 k100 k50 k20 k10 k
f
OSC
, OSCILLATOR FREQUENCY (kHz)
1.0
2.0
5.0
10
20
50
100
% DT, PERCENT OUTPUT DEADTIME
1
2
Figure 4. Oscillator Discharge Current
versus Temperature
Figure 5. Maximum Output Duty Cycle
versus Timing Resistor
, DISCHARGE CURRENT (mA)
7.0
-55
T
A
, AMBIENT TEMPERATURE (°C)
-25 0 25 50 75 100 125
dischg
I
7.5
8.0
8.5
9.0
V
CC
= 15 V
V
OSC
= 2.0 V
, MAXIMUM OUTPUT DUTY CYCLE (%)
max
D
40
0.8
R
T
, TIMING RESISTOR (kW)
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
50
60
70
80
90
100
I
dischg
= 7.5 mA
V
CC
= 15 V
C
T
= 3.3 nF
T
A
= 25°C
1. C
T
= 10 nF
2. C
T
= 5.0 nF
3. C
T
= 2.0 nF
4. C
T
= 1.0 nF
5. C
T
= 500 pF
6. C
T
= 200 pF
7. C
T
= 100 pF
5
I
dischg
= 8.8 mA
7
3
6
4
V
CC
= 15 V
T
A
= 25°C
Figure 6. Error Amp Small Signal
Transient Response
Figure 7. Error Amp Large Signal
Transient Response
1.0 ms/DIV0.5 ms/DIV
20 mV/DIV
20 mV/DIV
2.55 V
2.50 V
2.45 V
3.0 V
2.5 V
2.0 V
V
CC
= 15 V
A
V
= -1.0
T
A
= 25°C
V
CC
= 15 V
A
V
= -1.0
T
A
= 25°C
Where: Vosc = 1.7 V
I
Rt
= Vref/Rt
Idis = 8.3 mA
Freq +
1
ǒ
Ct
Vosc
I
Rt
Ǔ
)
ǒ
Ct
Vosc
Idis*I
Rt
Ǔ
NCV3843BV
http://onsemi.com
6
Figure 8. Error Amp Open Loop Gain and
Phase versus Frequency
Figure 9. Current Sense Input Threshold
versus Error Amp Output Voltage
Figure 10. Reference Voltage Change
versus Source Current
Figure 11. Reference Short Circuit Current
versus Temperature
-20
A
VOL
, OPEN LOOP VOLTAGE GAIN (dB)
10 M10
f, FREQUENCY (Hz)
Gain
Phase
V
CC
= 15 V
V
O
= 2.0 V to 4.0 V
R
L
= 100 K
T
A
= 25°C
0
30
60
90
120
150
180
100 1.0 k 10 k 100 k 1.0 M
0
20
40
60
80
100
, EXCESS PHASE (DEGREES)
φ
0
V
O
, ERROR AMP OUTPUT VOLTAGE (V)
0
, CURRENT SENSE INPUT THRESHOLD (V)
V
th
0.2
0.4
0.6
0.8
1.0
1.2
2.0 4.0 6.0 8.0
V
CC
= 15 V
T
A
= 25°C
T
A
= -55°C
T
A
= 125°C
V
CC
= 15 V
T
A
= -55°C
T
A
= 25°C
, REFERENCE VOLTAGE CHANGE (mV)
-16
0
I
ref
, REFERENCE SOURCE CURRENT (mA)
20 40 60 80 100 120
ref
V
-12
-8.0
-4.0
0
Δ
-20
-24
T
A
= 125°C
V
CC
= 15 V
R
L
≤ 0.1 W
, REFERENCE SHORT CIRCUIT CURRENT (mA)
SC
I
50
-55
T
A
, AMBIENT TEMPERATURE (°C)
-25 0 25 50 75 100 125
70
90
110
Figure 12. Reference Load Regulation Figure 13. Reference Line Regulation
2.0 ms/DIV 2.0 ms/DIV
V
CC
= 15 V
I
O
= 1.0 mA to 20 mA
T
A
= 25°C
V
CC
= 12 V to 25
T
A
= 25°C
, OUTPUT VOLTAGE CHANGE (2.0 mV/DIV)
V
O
Δ
, OUTPUT VOLTAGE CHANGE (2.0 mV/DIV)
V
O
Δ
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

NCV3843BVDR2G

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Buy NCV3843BVDR2G
Manufacturer:
ON Semiconductor
Description:
Switching Controllers ANA PWM SWTCHING REG
Lifecycle:
New from this manufacturer.
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