NCP4328
Secondary Side CV/CC
Controller
The NCP4328 is a secondary side SMPS controller designed for use
in applications which requires constant current and/or constant current
regulation.
The NCP4328x consists of two OTA amplifiers for voltage and
current loop regulation with precise internal voltage references.
Outputs of OTAs are open drain type (OTAs sink current only).
The NCP4328B includes a LED driver pin implemented with an
open drain MOSFET driven by a 1 kHz square wave with a 12.5%
duty cycle working when VCC is above UVLO for indication purpose.
The NCP4328A is available in TSOP−5 package while the
NCP4328B is available in TSOP−6 package.
Features
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MARKING
DIAGRAMS
5
5
1
TSOP−5
SN SUFFIX
CASE 483
1
XXXAYWG
G
•
•
•
•
•
•
Operating Input Voltage Range: 2.5 V to 36.0 V
Supply current < 100
mA
±0.5%
Reference Voltage Accuracy (T
J
= 25°C)
Constant Voltage and Constant Current (A versions) Control Loop
Indication LED PWM Modulated Driver (NCP4328B)
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
1
TSOP−6
SN SUFFIX
CASE 318G
1
XXXAYWG
G
Typical Applications
•
Offline Adapters for Notebooks, Game Stations and Printers
•
LED Lightening
•
High Power AC−DC Converters for TVs, Set−Top Boxes, Monitors
etc.
XXX = Specific Device Code
A
= Assembly Location
Y
= Year
W = Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 8 of this data sheet.
©
Semiconductor Components Industries, LLC, 2015
1
July, 2015 − Rev. 2
Publication Order Number:
NCP4328/D
NCP4328
VCC
GND
Sink only
OTA
Current
Regulation
ISNS
V
REFC
V
CC
management
FBC
Sink only
OTA
Voltage
Regulation
VSNS
V
REF
NCP4328A
VCC
Sink only
V
CC
management
Power
RESET
OTA
V
REFC
ISNS
Current
Regulation
GND
V
REF
FBC
LED
Power
RESET
Sink only
OTA
V
REF
VSNS
Voltage
Regulation
SW
1 kHz, 12% D.C.
Oscillator
NCP4328B
Figure 1. Simplified Block Diagrams NCP4328A and NCP4328B
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2
NCP4328
PIN FUNCTION DESCRIPTION
NCP4328A
TSOP−5
1
2
5
4
−
3
NCP4328B
TSOP−6
1
2
6
4
5
3
Pin Name
VCC
GND
VSNS
ISNS
LED
FBC
Supply voltage pin
Ground
Output voltage sensing pin, connected to output voltage divider
Current sensing input for output current regulation, connect it to shunt resistor
in ground branch.
PWM LED driver output. Connected to LED cathode with current define by
external serial resistance
Output of current sinking OTA amplifiers driving feedback optocoupler’s LED.
Connect here compensation networks as well.
Description
ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage
FBC, LED Voltage
VSNS, ISNS Voltage
LED Current
Thermal Resistance − Junction−to−Air (Note 1)
Junction Temperature
Storage Temperature
ESD Capability, Human Body Model (Note 2)
ESD Capability, Machine Model (Note 2)
Symbol
V
CC
V
FBC
, V
LED
V
SNS
,V
ISNS
I
LED
R
qJA
T
J
T
STG
ESD
HBM
ESD
MM
Value
−0.3 to 40.0
−0.3 to V
CC
+ 0.3
−0.3 to 10.0
10
315
−40 to 150
−55 to 150
2000
250
Unit
V
V
V
mA
°C/W
°C
°C
V
V
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
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.
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NCP4328
ELECTRICAL CHARACTERISTICS
−40°C
≤
T
J
≤
125°C; V
CC
= 15 V; unless otherwise noted. Typical values are at T
J
= +25°C.
Parameter
Maximum Operating Input Voltage
VCC UVLO
VCC UVLO Hysteresis
NCP4328A
Quiescent Current
VOLTAGE CONTROL LOOP OTA
Transconductance
Sink current only
2.8 V
≤
V
CC
≤
36.0 V, T
J
= 25°C
Reference Voltage
2.8 V
≤
V
CC
≤
36.0 V, T
J
= 0 − 85°C
2.8 V
≤
V
CC
≤
36.0 V,
T
J
= −40 − 125°C
Sink Current Capability
Inverting Input Bias Current
CURRENT CONTROL LOOP OTA
Transconductance
Sink current only
T
J
= 25°C
Reference Voltage
T
J
= −20 – 85°C
T
J
= −40 – 125°C
Sink Current Capability
Inverting Input Bias Current
LED DRIVER (NCP4328B Only)
Switching Frequency
Duty Cycle
Switch Resistance
(Note 3)
I
LED
= 5 mA
f
SWLED
D
LED
R
SW
10.0
1
12.5
50
15.0
kHz
%
W
V
FBC
> 1.5 V
I
SNS
= V
REFC
I
SINKC
I
BIASC
V
REFC
gm
C
61.2
60.5
60.0
2.5
−100
100
3
62.5
62.5
62.5
63.8
64.5
65.0
mA
nA
mV
S
V
FBC
> 1.5 V
V
SNS
= V
REF
V
REF
gm
V
1.244
1.240
1.230
I
SINKV
I
BIASV
2.5
−100
100
1
1.250
1.250
1.250
1.256
1.264
1.270
mA
nA
V
S
NCP4328B
I
CC
V
CC
rising
V
CC
falling
Test Conditions
Symbol
V
CC
3.3
V
CCUVLO
V
CCUVLOHYS
2.3
0.8
3.5
2.5
1.0
105
115
130
140
Min
Typ
Max
36.0
3.7
2.7
V
V
mA
Unit
V
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.
3. Guaranteed by design.
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NCP4328
TYPICAL CHARACTERISTICS
1.29
1.28
1.27
V
REF
(V)
1.26
1.25
1.24
1.23
1.22
−40
1.29
1.28
1.27
V
REF
(V)
−20
0
20
40
60
T
J
(°C)
80
100
120
1.26
1.25
1.24
1.23
1.22
0
6
12
18
V
CC
(V)
24
30
36
Figure 2. V
REF
at V
CC
= 15 V
65
64.5
64
63.5
V
REFC
(mV)
63
V
REFC
(mV)
65
64.5
64
63.5
63
Figure 3. V
REF
at T
J
= 255C
62.5
62
62.5
62
61.5
61
60.5
60
−40
−20
0
20
40
60
T
J
(°C)
80
100
120
61.5
61
60.5
60
0
6
12
18
V
CC
(V)
24
30
36
Figure 4. V
REFC
at V
CC
= 15 V
Figure 5. V
REFC
at T
J
= 255C
3.8
3.6
3.4
V
CC
(V)
3.2
3.0
2.8
2.6
2.4
−40
VCCUVLO_F
VCCUVLO_R
−20
0
20
40
60
T
J
(°C)
80
100
120
Figure 6. V
CCUVLO
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