NCS1002DR2G_技术文档

NCS1002

Constant Voltage / Constant

Current SecondarySide

Controller

Description

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MARKING

The NCS1002 is a highly integrated solution for Switching Mode

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.

DIAGRAMS

8

SOIC−8

D SUFFIX

CASE 751

1002

8

ALYWG

G

1

A

L

Y

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

W

G

(Note: Microdot may be in either location)

PIN CONNECTIONS

Features

V

1

2

3

4

8

7

6

5

Out 1

• Low Input Offset Voltage: 0.5 mV, Typ

• Input Common-Mode Range includes Ground

CC

Out 2

In 2−

In 2+

In 1−

• Low Quiescent Current: 300 mA per Op Amp at V = 5 V

CC

In 1+

• Large Output Voltage Swing

• Wide Power Supply Range: 3 V to 32 V

• High ESD Protection: 2 kV

GND

(Top View)

• These are Pb−Free Devices

Typical Applications

• Battery Chargers

• Switch Mode Power Supplies

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 8 of this data sheet.

1

Publication Order Number:

July, 2009 − Rev. 1

NCS1002/D

NCS1002

MAXIMUM RATINGS

Parameter

Symbol

Rating

36

Unit

V

Supply Voltage (V to GND)

V

CC

Differential Input Voltage

Input Voltage

V

36

V

id

V

−0.3 to +36

2000

V

i

ESD Protection Voltage at Pin

Maximum Junction Temperature

Human Body Model

V

ESD

V

T

150

°C

J

Specification Temperature Range (T

to T

)

T

A

−40 to +105

−55 to +125

−55 to +150

min

max

Operating Free−Air Temperature Range

T

oper

Storage Temperature Range

T

stg

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.

THERMAL CHARACTERISTICS

Parameter

Symbol

Rating

Unit

Thermal Resistance

Junction−to−Ambient

R

175

°C/W

q

JA

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2

NCS1002

ELECTRICAL CHARACTERISTICS

Symbol

Characteristics

Conditions

Min

Typ

Max

Unit

I

Total Supply Current, excluding current in the Voltage Reference V = 5 V, no

0.3

0.4

mA

CC

load; −40 v T v +105°C

A

I

Total Supply Current, excluding Current in the Voltage Reference V = 30 V, no

0.75

mA

CC

load; −40 v T v +105°C

A

OP AMP 1 (OP AMP WITH NONINVERTING INPUT CONNECTED TO THE INTERNAL V

)

ref

(V = 5 V, T = 25°C unless otherwise noted)

CC

A

V

IO

Input Offset Voltage

T = 25°C

2.0

3.0

mV

A

−40 v T v +105°C

A

DV

Input Offset Voltage Drift (−40 v T v +105°C)

7.0

20

mV/°C

nA

IO

A

l

IB

Input Bias Current (Inverting Input Only) T = 25°C

A

AVD

Large Signal Voltage Gain (V = 15 V, R = 2 kW,

ICM

100

V/mV

CC

L

V

= 0 V)

PSRR

Power Supply Rejection (V = 5.0 V to 30 V, V

= 2 V)

80

20

100

40

dB

CC

OUT

I

Output Source Current (V = 15 V, V = 2.0 V,

OUT

mA

SOURCE

CC

V

id

= 1 V)

I

Short Circuit to GND (V = 15 V)

40

10

60

mA

O

CC

I

Output Current Sink (V = −1 V)

V

CC

= +15 V, V = 0.2 V

OUT

1

SINK

id

(Note 1)

V

= +15 V, V

= 2 V

OUT

10

26

27

20

27

mA

V

CC

V

OH

Output Voltage Swing, High (V = 30 V)

R = 2 kW, T = 25°C

CC

L

A

−40 v T v +105°C

A

R = 10 kW, T = 25°C

28

L

A

−40 v T v +105°C

A

V

OL

Output Voltage Swing, Low

5.0

50

mV

R = 10 kW, T = 25°C

L

A

−40 v T v +105°C

A

SR

Slew Rate (AV = +1, V = 0.5 V to 2 V, V = 15 V,

0.2

0.5

0.4

0.9

V/ms

MHz

%

i

CC

R = 2 kW, C = 100 pF)

L

GBP

THD

Gain Bandwidth Product (V = 30 V, AV = +1, (Note 1)

CC

R = 2 kW, C = 100 pF, f = 100 kHz, V = 10 mV )

L

IN

PP

Total Harmonic Distortion (f = 1 kHz, AV = 10,

R = 2 kW, V = 30 V, V = 2 V

0.08

)

PP

L

CC

OUT

OP AMP 2 (INDEPENDENT OP AMP) (V = 5.0 V, T = 25°C unless otherwise noted)

CC

A

V

IO

Input Offset Voltage

T = 25°C

0.5

2.0

3.0

mV

A

−40 v T v +105°C

A

DV

Input Offset Voltage Drift (−40 v T v +105°C)

7.0

2.0

mV/°C

IO

A

I

IO

Input Offset Current

T = 25°C

A

75

nA

−40 v T v +105°C

150

200

A

I

Input Bias Current

T = 25°C

A

20

nA

V/mV

dB

B

−40 v T v +105°C

A

AVD

Large Signal Voltage Gain (V = 15 V,

T = 25°C

50

25

65

100

CC

A

R = 2 kW, V

= 1.4 V to 11.4 V)

L

OUT

−40 v T v +105°C

A

PSRR

Power Supply Rejection (V = 5 V to 30 V)

CC

1. Guaranteed by design and/or characterization.

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3

NCS1002

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Characteristics

Conditions

Min

Typ

Max

Unit

OP AMP 2 (INDEPENDENT OP AMP) (continued) (V = 5.0 V, T = 25°C unless otherwise noted)

CC

A

V

ICM

Input Common Mode Voltage Range (Note 2)

CC

T = 25°C

A

0

V

CC

1.5

−

V

(V = +30 V)

−40 v T v +105°C

0

V

CC

2.0

−

A

CMRR

Common Mode Rejection Ratio (Note 4)

0 to V − 1.7 V,

70

60

20

85

dB

CC

T = 25°C

A

0 to V − 2.2 V

CC

−40 v T v +105°C

A

I

Output Current Source (V = 15 V, V

= 2 V, V = +1 V)

40

10

20

27

mA

V

SOURCE

CC

OUT

ID

I

O

Short−Circuit to GND (V = 15 V)

60

CC

I

Output Current Sink (V = −1 V)

V

= +15 V, V = 0.2 V

OUT

1

SINK

ID

CC

V

= +15 V, V

= 2 V

10

26

27

CC

OUT

V

OH

Output Voltage Swing, High (V = 30 V)

R = 2 kW, T = 25°C

CC

L

A

−40 v T v +105°C

A

R = 10 kW, T = 25°C

28

L

A

−40 v T v +105°C

A

V

OL

Output Voltage Swing, Low

5.0

50

mV

R = 10 kW, T = 25°C

L

A

−40 v T v +105°C

A

SR

Slew Rate (AV = +1, V = 0.5 V to 3 V, V = 15 V, R = 2 kW, C = 100 pF)

0.2

0.5

0.4

0.9

V/ms

i

CC

L

GBP

Gain Bandwidth Product (V = 30 V, AV = +1,

MHz

CC

R = 2 kW, C = 100 pF, f = 100 kHz, V = 10 mV ) (Note 4)

L

IN

PP

THD

Total Harmonic Distortion (f = 1 kHz, AV = 10,

R = 2 kW, V = 30 V, V = 2 V

0.08

50

%

)

PP

L

CC

OUT

e

noise

Equivalent Input Noise Voltage (f = 1 kHz, R = 100 W, V = 30 V)

nV/√Hz

S

CC

VOLTAGE REFERENCE

I

Cathode Current

Reference Voltage (I = 1 mA)

1 to 100

2.5

mA

V

K

V

ref

T = 25°C

2.49

2.48

2.51

2.52

30

K

A

−40 v T v +105°C

2.5

A

DV

Reference Deviation over Temperature (V = V , I = 10 mA, −40 v T v

A

+105°C) (Note 4)

7.0

mV

ref

KA

ref

K

I

Minimum Cathode Current for Regulation (V w 2.45 V )

40

75

mA

min

KA

f

I ZKA I

Dynamic Impedance (Note 3)

(V = V , I = 1 mA to 100 mA, f < 1 kHz)

0.2

0.5

W

KA

ref

K

2. The input common−mode voltage of either input signal should not be allowed to go negative by more than 0.3 V. The upper end of the

common−mode range is V − 1.5 V. Both inputs can go to V + 0.3 V without damage.

CC

3. The Dynamic Impedance is defined as l ZKA l = DV / DI .

KA

K

4. Guaranteed by design and/or characterization.

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4

NCS1002

25

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

20

15

10

5

OP1

0

−50 −30 −10 10

30

50

70

90

110 130

−50 −30 −10

10

30

50

70

90

110

TEMPERATURE (°C)

Figure 1. Input Offset Voltage vs. Temperature

Figure 2. IB vs. Temperature

2.6

2.58

2.56

2.54

2.52

2.5

2.52

2.51

2.5

2.48

2.46

2.44

2.42

2.4

2.49

2.48

0

10

20 30 40 50 60 70 80 90 100

−40

−20

0

20

40

60

80

100

CATHODE CURRENT IK (mA)

TEMPERATURE (°C)

Figure 3. Vref as a Function of IK

Figure 4. Vref Over Temperature

S − Stable; U − Unstable

0.5

0.45

0.4

25

20

15

14

13

12

11

10

9

s

u

s

u

s

u

s

u

s

u

s

u

s

u

s

u

s

u

s

u

s

u

s

u

s

u

s

0.35

0.3

8

7

6

5

4

3

0.25

0.2

2

1

0.5

100 pF 500 1000 1500 2000 3 nF

4

5.8

−40−30−20−10 0 10 20 30 40 50 60 70 80 90 100

CAPACITIVE LOAD ON Vref (Pin 3)

TEMPERATURE (°C)

Figure 5. Region of Reference Stability vs.

Capacitive Load (Pin 3)

Figure 6. Ref Dynamic Impedance vs.

Temperature

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5

NCS1002

120

100

80

120

100

80

60

40

20

0

25°C

−40°C

25°C

105°C

60

40

20

0

5

10

15

20

25

30

35

0

5

10

15

20

25

30

35

SUPPLY VOLTAGE (V)

Figure 7. NCS1002 PSRR vs. Supply Voltage

Figure 8. NCS1002 CMRR vs. Supply Voltage

10

5

2

1

0.5

0.2

0.1

0.05

0.02

0.01

0.005

0.002

0.001

500

FREQUENCY (Hz)

20

50

100

200

1k

2k

5k

10k

20k

Figure 9. THD+N

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6

NCS1002

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7

NCS1002

ORDERING INFORMATION

Device

†

Package

Shipping

NCS1002DR2G

SOIC−8

(Pb−Free)

2500 / Tape & Reel

†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.

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8

NCS1002

PACKAGE DIMENSIONS

SOIC−8 NB

CASE 751−07

ISSUE AJ

NOTES:

1. DIMENSIONING AND TOLERANCING PER

ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSION A AND B DO NOT INCLUDE

MOLD PROTRUSION.

−X−

A

4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)

PER SIDE.

8

5

4

5. DIMENSION D DOES NOT INCLUDE DAMBAR

PROTRUSION. ALLOWABLE DAMBAR

PROTRUSION SHALL BE 0.127 (0.005) TOTAL

IN EXCESS OF THE D DIMENSION AT

MAXIMUM MATERIAL CONDITION.

6. 751−01 THRU 751−06 ARE OBSOLETE. NEW

STANDARD IS 751−07.

S

M

B

0.25 (0.010)

Y

1

K

−Y−

MILLIMETERS

DIM MIN MAX

INCHES

G

MIN

MAX

0.197

0.157

0.069

0.020

A

B

C

D

G

H

J

K

M

N

S

4.80

3.80

1.35

0.33

5.00 0.189

4.00 0.150

1.75 0.053

0.51 0.013

C

N X 45

_

SEATING

PLANE

1.27 BSC

0.050 BSC

−Z−

0.10

0.19

0.40

0

0.25 0.004

0.25 0.007

1.27 0.016

0.010

0.050

8

0.020

0.244

0.10 (0.004)

M

J

H

D

8

0

_

0.25

5.80

0.50 0.010

6.20 0.228

M

S

X

0.25 (0.010)

Z

Y

SOLDERING FOOTPRINT*

1.52

0.060

7.0

4.0

0.275

0.155

0.6

0.024

1.270

0.050

mm

inches

ǒ

Ǔ

SCALE 6:1

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and

Mounting Techniques Reference Manual, SOLDERRM/D.

ON Semiconductor and

are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice

to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All

operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights

nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications

intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should

Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,

and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death

associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal

Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

PUBLICATION ORDERING INFORMATION

LITERATURE FULFILLMENT:

N. American Technical Support: 800−282−9855 Toll Free

USA/Canada

Europe, Middle East and Africa Technical Support:

Phone: 421 33 790 2910

Japan Customer Focus Center

Phone: 81−3−5773−3850

ON Semiconductor Website: www.onsemi.com

Order Literature: http://www.onsemi.com/orderlit

Literature Distribution Center for ON Semiconductor

P.O. Box 5163, Denver, Colorado 80217 USA

Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada

Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada

Email: orderlit@onsemi.com

For additional information, please contact your local

Sales Representative

NCS1002/D

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9


型号：	NCS1002DR2G
厂家：	ONSEMI
描述：	Constant Voltage / Constant Current SecondarySide Controller 恒压/恒流SecondarySide控制器电源电路参考电压源开关光电二极管控制器 PC
文件：	总9页 (文件大小：205K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

NCS1002DR2G [ONSEMI]

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