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NCP4355ADR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
NCP4355
http://onsemi.com
4
PIN FUNCTION DESCRIPTION
NCP4355A NCP4355B NCP4355C Pin Name Description
8 8 8 VCC Supply voltage pin
7 7 7 GND Ground
1 1 1 VSNS Output voltage sensing pin, connected to output voltage divider
2 2 2 OFFDET OFF mode detection input. Voltage divider provides adjustable off mode
detection threshold
− 3 3 VMIN Minimum output voltage adjustment
3 − 4 ISNS Current sensing input for output current regulation, connect it to shunt
resistor in ground branch.
4 4 − LED PWM LED driver output. Connected to LED cathode with current define by
external serial resistance
6 6 6 FBC Output of current sinking OTA amplifier or amplifiers driving feedback op-
tocoupler’s LED. Connect here compensation network (networks) as well.
5 5 5 ON/OFF ON mode current sink. This output keeps primary control pin at low level
in on mode.
ABSOLUTE MAXIMUM RATINGS
Rating Symbol Value Unit
Input Voltage V
CC
−0.3 to 40.0 V
ON/OFF, FBC, LED Voltage V
ONOFF
, V
FBC
, V
LED
−0.3 to V
CC
+ 0.3 V
VSNS, ISNS, OFFDET, VMIN Voltage V
SNS
, V
ISNS
, V
OFFDET
, V
MIN
−0.3 to 10.0 V
LED Current I
LED
10 mA
Thermal Resistance − Junction−to−Air (Note 1) NCP4355A/C
NCP4355B
R
q
JA
260
277
°C/W
Junction Temperature T
J
−40 to 150 °C
Storage Temperature T
STG
−60 to 150 °C
ESD Capability, Human Body Model (Note 2) ESD
HBM
2000 V
ESD Capability, Machine Model (Note 2) ESD
MM
250 V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. 50 mm
2
, 1.0 oz. Copper spreader.
2. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per JESD22−A114F
ESD Machine Model tested per JESD22−A115C
Latchup Current Maximum Rating tested per JEDEC standard: JESD78D.
NCP4355
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS
0°C ≤ TJ ≤ 125°C; V
CC
= 15 V; unless otherwise noted. Typical values are at TJ = +25°C.
Parameter
Test Conditions Symbol Min Typ Max Unit
Maximum Operating Input Voltage VCC 36.0 V
VCC UVLO
V
CC
rising
V
CCUVLO
3.75 4.00 4.25
V
V
CC
falling 3.22 3.50 3.78
VCC UVLO Hysteresis V
CCUVLOHYS
0.4 0.5 V
Quiescent Current In Regulation
NCP4355A
I
CC
125 155 mA
NCP4355B 107 135
NCP4355C 115 155
Quiescent Current In OFF mode V
SNS
< 1.12 V I
CCOFF
90 110
mA
VOLTAGE CONTROL LOOP OTA
Transconductance
Sink current only gm
V
1 S
Reference Voltage
3.8 V ≤ V
CC
≤ 36.0 V, T
J
= 25°C
V
REF
1.244 1.250 1.256
V
3.8 V ≤ V
CC
≤ 36.0 V, T
J
= 0 − 85°C 1.240 1.250 1.264
3.8 V ≤ V
CC
≤ 36.0 V, T
J
= 0 − 125°C 1.230 1.250 1.270
Sink Current Capability
In regulation, V
FBC
> 1.5 V
I
SINKV
2.5 mA
In OFF mode, V
FBC
> 1.5 V 1.2 1.5 2.0 mA
Inverting Input Bias Current
In regulation
I
BIASV
−100 100 nA
In OFF mode, V
SNS
> 1.12 V −2.6 −2.3 −1.9
mA
Inverting Input Bias Current Threshold In OFF mode V
SNSBIASTH
1.07 1.12 1.17 V
CURRENT CONTROL LOOP OTA (except NCP4355B)
Transconductance
Sink current only gm
C
3 S
Reference Voltage V
REFC
60.0 62.5 65.0 mV
Sink Current Capability V
FBC
> 1.5 V I
SINKC
2.5 mA
Inverting Input Bias Current I
SNS
= V
REFC
I
BIASC
−100 100 nA
MINIMUM VOLTAGE COMPARATOR (except NCP4355A)
Threshold Voltage
V
REFM
355 377 400 mV
Hysteresis Output change from logic high to logic low V
MINH
40 mV
OFF MODE DETECTION COMPARATOR
Threshold Value
2.5 V ≤ V
CC
≤ 36.0 V
V
OFFDETTH
10% V
CC
V
V
CC
= 15 V 1.47 1.50 1.53 V
Hysteresis Output change from logic high to logic low V
OFFDETH
40 mV
LED DRIVER (except NCP4355C)
Switching Frequency
f
SWLED
1 kHz
Duty Cycle D
LED
10.0 12.5 15.0 %
Switch Resistance I
LED
= 5 mA R
SW2
50
W
ON MODE CONTROL
Sink Current
In ON mode, V
ONOFF
> 0.6 V I
DRIVEON
140 160 180
mA
NCP4355
http://onsemi.com
6
TYPICAL CHARACTERISTICS
Figure 4. V
REF
at V
CC
= 15 V Figure 5. V
REF
at T
J
= 255C
T
J
(°C) V
CC
(V)
100806040200−20−40
1.22
1.23
1.24
1.25
1.26
1.27
1.28
1.29
363024181260
1.22
1.23
1.24
1.25
1.26
1.27
1.28
1.29
Figure 6. V
REFC
at V
CC
= 15 V Figure 7. V
REFC
at T
J
= 255C
T
J
(°C) V
CC
(V)
100806040200−20−40
62.0
62.1
62.3
62.4
62.5
62.7
62.9
63.0
363024181260
Figure 8. V
REFM
at V
CC
= 15 V Figure 9. V
REFM
at T
J
= 255C
T
J
(°C) V
CC
(V)
350
360
370
380
390
400
410
350
360
370
380
390
400
410
V
REF
(V)
V
REF
(V)
V
REFC
(mV)
V
REFC
(mV)
V
REFM
(mV)
V
REFM
(mV)
120
62.2
62.6
62.8
120
62.0
62.1
62.3
62.4
62.5
62.7
62.9
63.0
62.2
62.6
62.8
100806040200−20−40 120
363024181260
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

NCP4355ADR2G

Mfr. #:
Buy NCP4355ADR2G
Manufacturer:
ON Semiconductor
Description:
Current & Power Monitors & Regulators Secondary Side Cntlr SMPS Off Mode
Lifecycle:
New from this manufacturer.
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