ncs1002 ON Semiconductor, ncs1002 Datasheet

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ncs1002

Manufacturer Part Number
ncs1002
Description
Constant Voltage/ Constant Current Secondary?side Controller
Manufacturer
ON Semiconductor
Datasheet

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NCS1002
Product Preview
Constant Voltage/ Constant
Current Secondary­Side
Controller
Description
Power Supply (SMPS) applications requiring a dual control loop to
perform Constant Voltage (CV) and Constant Current (CC) regulation.
The NCS1002 integrates a 2.5 V voltage reference and two precision
op amps. The voltage reference, along with Op Amp 1, is the core of
the voltage control-loop. Op Amp 2 is an independent, uncommitted
amplifier specifically designed for the current control. Key external
components needed to complete the two control loops are: (a) A
resistor divider that senses the output of the power supply (battery
charger) and fixes the voltage regulation set point at the specified
value. (b) A sense resistor that feeds the current sensing circuit with a
voltage proportional to the DC output current. This resistor determines
the current regulation set point and must be adequately rated in terms
of power dissipation. The NCS1002 comes in a small 8−pin SOIC
package and is ideal for space-shrunk applications such as battery
chargers.
Features
Typical Applications
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2009
May, 2009 − Rev. P3
The NCS1002 is a highly integrated solution for Switching Mode
Low Input Offset Voltage: 0.5 mV, Typ
Input Common-Mode Range includes Ground
Low Quiescent Current: 300 mA per Op Amp at V
Large Output Voltage Swing
Wide Power Supply Range: 3 V to 32 V
High ESD Protection: 2 kV
These are Pb−Free Devices
Battery Chargers
Switch Mode Power Supplies
CC
= 5 V
1
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
(Note: Microdot may be in either location)
8
ORDERING INFORMATION
Out 1
In 1+
A
L
Y
W
G
In 1−
GND
1
PIN CONNECTIONS
http://onsemi.com
1
2
3
4
CASE 751
D SUFFIX
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
SOIC−8
(Top View)
Publication Order Number:
8
7
6
5
DIAGRAMS
8
1
MARKING
V
Out 2
In 2−
In 2+
ALYWG
CC
N1002
NCS1002/D
G

Related parts for ncs1002

ncs1002 Summary of contents

Page 1

... A sense resistor that feeds the current sensing circuit with a voltage proportional to the DC output current. This resistor determines the current regulation set point and must be adequately rated in terms of power dissipation. The NCS1002 comes in a small 8−pin SOIC package and is ideal for space-shrunk applications such as battery chargers. ...

Page 2

MAXIMUM RATINGS Parameter Supply Voltage (V to GND) CC Differential Input Voltage Input Voltage ESD Protection Voltage at Pin Maximum Junction Temperature Specification Temperature Range (T min Operating Free−Air Temperature Range Storage Temperature Range Stresses exceeding Maximum Ratings may damage ...

Page 3

ELECTRICAL CHARACTERISTICS Symbol Characteristics I Total Supply Current, excluding current in the Voltage Reference V CC load; − +105° Total Supply Current, excluding Current in the Voltage Reference V CC load; − ...

Page 4

ELECTRICAL CHARACTERISTICS (continued) Symbol Characteristics OP AMP 2 (INDEPENDENT OP AMP) (continued Input Common Mode Voltage Range (Note 2) ICM ( CMRR Common Mode Rejection Ratio (Note 4) I Output Current Source (V = ...

Page 5

OP1 0.4 0.2 0 −50 −30 − TEMPERATURE (°C) Figure 1. Input Offset Voltage vs. Temperature 2.6 2.58 2.56 2.54 2.52 2.5 2.48 2.46 2.44 2.42 2 ...

Page 6

... Figure 7. NCS1002 PSRR vs. Supply Voltage 0.5 0.2 0.1 0.05 0.02 0.01 0.005 0.002 0.001 20 50 100 120 25°C 100 Figure 8. NCS1002 CMRR vs. Supply Voltage 500 200 1k 2k FREQUENCY (Hz) Figure 9. THD+N http://onsemi.com 6 −40°C 105°C 25° SUPPLY VOLTAGE (V) 5k 10k 20k 35 ...

Page 7

http://onsemi.com 7 ...

Page 8

... ORDERING INFORMATION Device NCS1002DR2G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Package SOIC−8 (Pb−Free) http://onsemi.com 8 † Shipping 2500 / Tape & Reel ...

Page 9

... C 1.35 1.75 0.053 0.069 D 0.33 0.51 0.013 0.020 G 1.27 BSC 0.050 BSC H 0.10 0.25 0.004 0.010 J 0.19 0.25 0.007 0.010 J K 0.40 1.27 0.016 0.050 0.25 0.50 0.010 0.020 S 5.80 6.20 0.228 0.244 mm inches ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCS1002/D _ ...

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