ON Semiconductor NCP1050, NCP1051, NCP1052, NCP1053, NCP1054 Technical data

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NCP1050P100

NCP1050, NCP1051,

NCP1052, NCP1053,

NCP1054, NCP1055

Monolithic High Voltage

Gated Oscillator Power

Switching Regulator

The NCP1050 through NCP1055 are monolithic high voltage regulators that enable end product equipment to be compliant with low standby power requirements. This device series combines the required converter functions allowing a simple and economical power system solution for office automation, consumer, and industrial products. These devices are designed to operate directly from a rectified AC line source. In flyback converter applications they are capable of providing an output power that ranges from 6.0 W to 40 W with a fixed AC input of 100 V, 115 V, or 230 V, and 3.0 W to 20 W with a variable AC input that ranges from 85 V to 265 V.

This device series features an active startup regulator circuit that eliminates the need for an auxiliary bias winding on the converter transformer, fault detector and a programmable timer for converter overload protection, unique gated oscillator configuration for extremely fast loop response with double pulse suppression, power switch current limiting, input undervoltage lockout with hysteresis, thermal shutdown, and auto restart fault detection. These devices are available in economical 8−pin dual−in−line and 4−pin SOT−223 packages.

Features

Startup Circuit Eliminates the Need for Transformer Auxiliary Bias Winding

Optional Auxiliary Bias Winding Override for Lowest Standby Power Applications

Converter Output Overload and Open Loop Protection

Auto Restart Fault Protection

IC Thermal Fault Protection

Unique, Dual Edge, Gated Oscillator Configuration for Extremely Fast Loop Response

Oscillator Frequency Dithering with Controlled Slew Rate Driver for Reduced EMI

Low Power Consumption Allowing European Blue Angel Compliance

On−Chip 700 V Power Switch Circuit and Active Startup Circuit

Rectified AC Line Source Operation from 85 V to 265 V

Input Undervoltage Lockout with Hysteresis

Oscillator Frequency Options of 44 kHz, 100 kHz, 136 kHz

Typical Applications

AC−DC Converters

Wall Adapters

Portable Electronic Chargers

Low Power Standby and Keep−Alive Supplies

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MARKING

 

 

DIAGRAMS

 

8

 

 

DIP−8

NCP105XZ

8

CASE 626A

AWL

 

P SUFFIX

YYWW

1

1

 

 

 

Pin: 1.

VCC

 

2.

Control Input

 

3, 7−8. Ground

4.No Connection

5.Power Switch Drain

 

 

 

4

 

4

SOT−223

N5XZ

 

CASE 318E

 

 

1

 

ALYW

 

ST SUFFIX

 

 

 

 

 

1

Pin: 1. VCC

2.Control Input

3.Power Switch Drain

4.Ground

X

= Current Limit (0, 1, 2, 3, 4, 5)

Z

= Oscillator Frequency (A, B, C)

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W

= Work Week

ORDERING INFORMATION

See detailed ordering and shipping information on page 22 of this data sheet.

Semiconductor Components Industries, LLC, 2003

1

Publication Order Number:

July, 2003 − Rev. 7

 

NCP1050/D

NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

 

 

 

 

 

+

AC Line

+

Snubber

+

Input

 

 

 

 

Converter

 

 

 

 

 

DC Output

 

 

 

 

5

 

 

Power Switch Circuit Output

 

 

 

 

 

VCC

Startup & VCC

 

 

 

+

1

Regulator Circuit

 

 

 

 

 

 

 

 

 

 

 

Power

 

 

 

Fault Detector

 

Switch

 

 

 

 

 

Circuit

 

Control Input

2

Oscillator &

 

 

 

 

 

 

 

 

 

 

Gating Logic

 

 

 

 

 

 

Ground 3, 7−8

 

 

 

 

 

Figure 1. Typical Application

Pin Function Description

 

 

 

 

 

 

 

Pin

Pin

 

 

 

(SOT−223)

(DIP−8)

 

Function

Description

 

 

 

 

 

1

1

 

VCC

This is the positive supply voltage input. During startup, power is supplied to this input

 

 

 

 

from Pin 5. When VCC reaches VCC(on), the Startup Circuit turns off and the output is

 

 

 

 

allowed to begin switching with 1.0 V hysteresis on the VCC pin. The capacitance

 

 

 

 

connected to this pin programs fault timing and frequency modulation rate.

 

 

 

 

 

2

2

 

Control Input

The Power Switch Circuit is turned off when a current greater than approximately

 

 

 

 

50 A is drawn out of or applied to this pin. A 10 V clamp is built onto the chip to

 

 

 

 

protect the device from ESD damage or overvoltage conditions.

 

 

 

 

 

4

3, 7, 8

 

Ground

This pin is the control circuit and Power Switch Circuit ground. It is part of the

 

 

 

 

integrated circuit lead frame.

 

 

 

 

 

4

 

No Connection

 

 

 

 

 

 

3

5

 

Power Switch

This pin is designed to directly drive the converter transformer primary, and internally

 

 

 

Drain

connects to Power Switch and Startup Circuit.

 

 

 

 

 

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ON Semiconductor NCP1050, NCP1051, NCP1052, NCP1053, NCP1054 Technical data

NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

 

 

 

+

AC Line

+

Snubber

+

Input

 

 

 

Converter

 

 

 

DC Output

 

 

 

 

 

Power Switch Circuit Output

VCC

 

 

Startup

 

 

 

+

Startup/VCC Reg

 

Circuit

 

 

 

 

 

 

 

 

 

10 V

 

 

 

 

 

 

+

Fault

 

 

 

 

 

 

 

 

Internal

VCC Bypass/

+

Detector

 

 

 

Bias

7.5/8.5 V

 

 

 

 

 

Fault Timing/

 

 

S

 

Fault

 

VCO Sweep

Undervoltage

Thermal

 

Latch

Power

Control

 

 

 

Shutdown

 

Q

 

Switch

 

Lockout

 

 

Circuit

 

 

 

 

 

 

 

R

 

 

Driver

 

+

 

 

 

 

 

 

 

 

 

 

+

 

 

 

 

 

 

4.5 V

 

 

 

VCC

 

 

 

 

Oscillator

 

 

IH = 10 A

Turn On

 

48 A

Latch

 

 

 

 

 

 

R

Turn Off

 

 

Latch

 

+

Q

Ck

 

 

 

 

2.6 V

S

Q

 

 

Control

 

 

R

Input

 

 

 

 

 

10 V

+

Leading Edge

 

 

 

+

Blanking

 

 

3.3 V

+

 

Current Limit

 

 

Comparator

 

 

IH = 10 A

 

RSENSE

48

 

 

A

 

 

Ground

Figure 2. Representative Block Diagram

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3

NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

fOSC (high)

8.5 V

VCC

 

 

fOSC (low)

 

 

 

7.5 V

 

 

 

Oscillator Duty

 

 

 

Cycle

 

 

 

Oscillator Clock

 

 

 

47.5 A

 

 

 

37.5 A

 

 

 

ICONTROL, SINK

 

 

 

0 A

 

 

 

 

Leading Edge On

Leading Edge On

Leading Edge On

Feedback Off

Duty Cycle Off

Leading Edge On

 

 

Duty Cycle Off

Delay On

No Second

Current Limit Off

 

Duty Cycle Off

Pulse

 

Power Switch

Circuit Gate Drive

Current Limit

Threshold

Primary Current

Current Limit

Propagation

Delay

Figure 3. Timing Diagram for Gated Oscillator with Dual Edge PWM

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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

ICC1, Current Measurement

ICC2, Current Measurement

VCC(on)

Hysteretic Regulation

VCC(off)

VCC

VCC(reset)

ICC3, Current Measurement

0 V

6.3 mA

I(start)

0 mA

ICC1

ICC2

ICC

ICC3

 

0 mA

 

 

I(start)

 

47.5 A

 

37.5 A

ICONTROL, SINK

0 A

V(pin 5)

Fault Applied

Fault Removed

 

Figure 4. Non−Latching Fault Condition Timing Diagram

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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

MAXIMUM RATINGS (Note 1)

Rating

Symbol

Value

Unit

 

 

 

 

Power Switch and Startup Circuit

 

 

 

Drain Voltage Range

VDS

0.3 to 700

V

Drain Current Peak During Transformer Saturation

IDS(pk)

2.0 Ilim Max

A

Power Supply/VCC Bypass and Control Input

VIR

0.3 to 10

V

Voltage Range

Current

Imax

100

mA

Thermal Characteristics

 

 

°C/W

P Suffix, Plastic Package Case 626A−01

 

 

 

Junction−to−Lead

R JL

9.0

 

Junction−to−Air, 2.0 Oz. Printed Circuit Copper Clad

R JA

77

 

0.36 Sq. Inch

 

 

1.0 Sq. Inch

 

60

 

ST Suffix, Plastic Package Case 318E−04

 

 

 

Junction−to−Lead

R JL

14

 

Junction−to−Air, 2.0 Oz. Printed Circuit Copper Clad

R JA

74

 

0.36 Sq. Inch

 

 

1.0 Sq. Inch

 

55

 

 

 

 

 

Operating Junction Temperature

TJ

40 to +150

°C

Storage Temperature

Tstg

65 to +150

°C

1.Maximum Ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute maximum−rated conditions is not implied. Functional operation should be restricted to the Recommended Operating Conditions.

A.This device series contains ESD protection and exceeds the following tests: Pins 1−3: Human Body Model 2000 V per MIL−STD−883, Method 3015.

Machine Model Method 400 V.

Pin 5: Human Body Model 1000 V per MIL−STD−883, Method 3015. Machine Model Method 400 V.

Pin 5 is connected to the power switch and start−up circuits, and is rated only to the max voltage of the part, or 700 V.

B.This device contains Latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.

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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

ELECTRICAL CHARACTERISTICS (VCC = 8.0 V, for typical values TJ = 25°C, for min/max values, TJ is the operating junction temperature range that applies (Note 2), unless otherwise noted.)

 

Characteristics

Symbol

Min

Typ

Max

Unit

 

 

 

 

 

 

 

OSCILLATOR

 

 

 

 

 

 

 

 

 

 

 

 

 

Frequency (VCC = 7.5 V)

 

fOSC(low)

 

 

 

kHz

TJ = 25°C:

 

 

 

 

 

 

A Suffix Device

 

 

38

42.5

47

 

B Suffix Device

 

 

87

97

107

 

C Suffix Device

 

 

119

132

145

 

TJ = Tlow to Thigh

 

 

 

 

 

 

A Suffix Device

 

 

37

47

 

B Suffix Device

 

 

84

107

 

C Suffix Device

 

 

113

145

 

 

 

 

 

 

 

 

Frequency (VCC = 8.5 V)

 

fOSC(high)

 

 

 

kHz

TJ = 25°C:

 

 

41

45.5

50

 

A Suffix Device

 

 

 

B Suffix Device

 

 

93

103

113

 

C Suffix Device

 

 

126

140

154

 

TJ = Tlow to Thigh

 

 

 

 

 

 

A Suffix Device

 

 

39

50

 

B Suffix Device

 

 

90

113

 

C Suffix Device

 

 

120

154

 

 

 

 

 

 

 

Frequency Sweep (VCC = 7.5 V to 8.5 V, TJ = 25°C)

%fOSC

5.0

%

Maximum Duty Cycle

 

D(max)

74

77

80

%

CONTROL INPUT

 

 

 

 

 

 

 

 

 

 

 

 

Lower Window Input Current Threshold

 

 

 

 

A

Switching Enabled, Sink Current Increasing

Ioff(low)

−58

−47.5

−37

 

Switching Disabled, Sink Current Decreasing

Ion(low)

−50

−37.5

−25

 

Upper Window Input Current Threshold

 

 

 

 

 

Switching Enabled, Source Current Increasing

Ioff(high)

37

47.5

58

 

Switching Disabled, Source Current Decreasing

Ion(high)

25

37.5

50

 

Control Window Input Voltage

 

 

 

 

V

Lower (Isink = 25 A)

 

Vlow

1.1

1.35

1.6

 

Upper (Isource = 25 A)

 

Vhigh

4.2

4.6

5.0

 

2. Tested junction temperature range for the NCP105X series:

 

 

 

 

 

Tlow = −40 °C

Thigh = +125°C

 

 

 

 

 

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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

ELECTRICAL CHARACTERISTICS (VCC = 8.0 V, for typical values TJ = 25°C, for min/max values, TJ is the operating junction temperature range that applies (Note 3), unless otherwise noted.)

 

Characteristics

Symbol

Min

Typ

Max

Unit

 

 

 

 

 

 

POWER SWITCH CIRCUIT

 

 

 

 

 

 

 

 

 

 

 

Power Switch Circuit On−State Resistance

RDS(on)

 

 

 

 

NCP1050, NCP1051, NCP1052 (ID = 50 mA)

 

 

 

 

 

TJ = 25°C

 

 

22

30

 

TJ = 125°C

 

 

42

55

 

NCP1053, NCP1054, NCP1055 (ID = 100 mA)

 

 

 

 

 

TJ = 25°C

 

 

10

15

 

TJ = 125°C

 

 

23

28

 

Power Switch Circuit & Startup Breakdown Voltage

V(BR)DS

700

V

(ID(off) = 100 A, TA = 25°C)

 

 

 

 

 

Power Switch Circuit & Startup Circuit Off−State Leakage Current

IDS(off)

 

 

 

A

(VDS = 650 V) TJ = 25°C

 

25

40

 

TJ = 125°C

 

15

80

 

Switching Characteristics (RL = 50 , VDS set for ID = 0.7 IIim)

 

 

 

 

ns

Turn−on Time (90% to 10%)

ton

20

 

Turn−off Time (10% to 90%)

toff

10

 

CURRENT LIMIT AND THERMAL PROTECTION

 

 

 

 

 

 

 

 

 

 

 

Current Limit Threshold (TJ = 25°C) (Note 6)

Ilim

 

 

 

mA

NCP1050

 

 

93

100

107

 

NCP1051

 

 

186

200

214

 

NCP1052

 

 

279

300

321

 

NCP1053

 

 

372

400

428

 

NCP1054

 

 

493

530

567

 

NCP1055

 

 

632

680

728

 

 

 

 

 

 

 

Conversion Power Deviation (T = 25°C) (Note 7)

I2f

0

10

%A2Hz

 

J

OSC

 

 

 

 

Propagation Delay, Current Limit Threshold to Power Switch Circuit Output

tPLH

 

 

 

ns

NCP1050, NCP1051, NCP1052

 

135

 

NCP1053, NCP1054, NCP1055

 

160

 

 

 

 

 

 

 

Thermal Protection (VCC = 8.6 V) (Note 3, 4, 5)

Tsd

140

160

°C

Shutdown (Junction Temperature Increasing)

 

Hysteresis (Junction Temperature Decreasing)

TH

75

 

STARTUP CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

Startup/VCC Regulation

 

 

 

 

 

V

Startup Threshold/VCC Regulation Peak (VCC Increasing)

VCC(on)

8.0

8.5

9.0

 

Minimum Operating/VCC Valley Voltage After Turn−On

VCC(off)

7.0

7.5

8.0

 

Hysteresis

 

VH

1.0

 

Undervoltage Lockout Threshold Voltage, VCC Decreasing

VCC(reset)

4.0

4.5

5.0

V

Startup Circuit Output Current (Power Switch Circuit Output = 40 V)

Istart

 

 

 

mA

VCC = 0 V

 

 

 

 

 

 

TJ = 25°C

 

 

5.4

6.3

7.2

 

TJ = −40 to 125 °C

 

 

4.5

8.0

 

VCC = VCC(on) − 0.2 V

 

 

 

 

 

 

TJ = 25°C

 

 

4.6

5.6

6.6

 

TJ = −40 to 125 °C

 

 

3.5

7.0

 

Minimum Start−up Drain Voltage (I start = 0.5 mA, VCC = VCC(on) − 0.2 V)

Vstart(min)

13.4

20

V

Output Fault Condition Auto Restart

 

 

 

 

 

(VCC Capacitor = 10 F, Power Switch Circuit Output = 40 V)

Drst

6.0

%

Average Switching Duty Cycle

Frequency

 

frst

3.5

Hz

3. Tested junction temperature range for the NCP105X series:

 

 

 

 

 

Tlow = −40 °C

Thigh = +125°C

 

 

 

 

 

4.Maximum package power dissipation limits must be observed.

5.Guaranteed by design only.

6.Adjust di/dt to reach Ilim in 4.0 sec.

7.Consult factory for additional options including test and trim for output power accuracy.

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