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

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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 c onfiguration f or e xtremely 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

T ypical Applications

• AC−DC Converters

• Wall Adapters

• Portable Electronic Chargers

• Low Power Standby and Keep−Alive Supplies

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MARKING

DIAGRAMS

DIP−8

Pin: 1. V

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.

CASE 626A

P SUFFIX

2. Control Input 3, 7−8. Ground

4. No Connection

5. Power Switch Drain

Pin: 1. V

SOT−223

CASE 318E

ST SUFFIX

2. Control Input

3. Power Switch Drain

4. Ground

NCP105XZ

AWL

YYWW

N5XZ

ALYW

 Semiconductor Components Industries, LLC, 2003

July, 2003 − Rev. 7

1 Publication Order Number:

NCP1050/D

NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

AC Line Input

Snubber

Converter DC Output

Power Switch Circuit Output

Startup & V

Regulator Circuit

Power

Fault Detector

Switch Circuit

Control Input

Oscillator &

Gating Logic

Ground

3, 7−8

Figure 1. T ypical Application

Pin Function Description

(SOT−223)

1 1 V

2 2 Control Input The Power Switch Circuit is turned off when a current greater than approximately

4 3, 7, 8 Ground This pin is the control circuit and Power Switch Circuit ground. It is part of the

− 4 No Connection 3 5 Power Switch

(DIP−8)

Function Description

This is the positive supply voltage input. During startup, power is supplied to this input from Pin 5. When V

reaches VCC(on), the Startup Circuit turns off and the output is

allowed to begin switching with 1.0 V hysteresis on the V connected to this pin programs fault timing and frequency modulation rate.

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.

integrated circuit lead frame.

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

Drain

connects to Power Switch and Startup Circuit.

pin. The capacitance

−

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AC Line Input

VCC Bypass/ Fault Timing/

Sweep

Control

NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

Startup

Circuit

Turn On

Latch R

Snubber

Power Switch Circuit Output

Internal

Bias

Fault Latch

Turn Off

Latch

48 A

10 V

Startup/VCC Reg

−

7.5/8.5 V

Undervoltage Lockout

− +

4.5 V

= 10 A

Fault

Detector

Thermal

Shutdown

Oscillator

Driver

Converter DC Output

−

Power Switch Circuit

Control Input

10 V

48 A

2.6 V

3.3 V

= 10 A

Current Limit Comparator

−

Ground

Figure 2. Representative Block Diagram

Leading Edge

Blanking

SENSE

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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

OSC (high)

8.5 V f

7.5 V

OSC (low)

Oscillator Duty

Oscillator Clock

Circuit Gate Drive

Primary Current

Cycle

CONTROL, SINK

Power Switch

47.5 A

37.5 A

0 A

Leading Edge On

Duty Cycle Off

Leading Edge On

Feedback Off

Delay On

Duty Cycle Off

Leading Edge On

Duty Cycle Off

No Second

Pulse

Leading Edge On

Current Limit Off

Current Limit Threshold

Current Limit Propagation Delay

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

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Hysteretic Regulation

CC(reset)

6.3 mA

(start)

CC1

0 mA

47.5 A

37.5 A

CONTROL, SINK

NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

, Current Measurement

CC(on)

CC(off)

0 V

0 mA

CC2

CC3

(start)

0 A

CC1

, Current Measurement

CC2

, Current Measurement

CC3

(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 Drain Current Peak During Transformer Saturation

Power Supply/VCC Bypass and Control Input

Voltage Range Current

Thermal Characteristics

P Suffix, Plastic Package Case 626A−01

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

0.36 Sq. Inch

1.0 Sq. Inch

ST Suffix, Plastic Package Case 318E−04

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

0.36 Sq. Inch

1.0 Sq. Inch Operating Junction Temperature T Storage Temperature T

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.

DS(pk)

max



stg

0.3 to 700

Max

2.0 I

lim

0.3 to 10

100

V A

°C/W

JL JA

9.0

77 60

JL JA

74 55

40 to +150 °C 65 to +150 °C

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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

ELECTRICAL CHARACTERISTICS (V

= 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

OSCILLATOR

Frequency (V

= 25°C:

= 7.5 V)

A Suffix Device B Suffix Device C Suffix Device

= T

to T

low

high

A Suffix Device B Suffix Device C Suffix Device

Frequency (VCC = 8.5 V)

= 25°C:

A Suffix Device B Suffix Device C Suffix Device

= T

to T

low

high

A Suffix Device B Suffix Device

C Suffix Device Frequency Sweep (VCC = 7.5 V to 8.5 V, TJ = 25°C) %f Maximum Duty Cycle D

CONTROL INPUT

Lower Window Input Current Threshold

Switching Enabled, Sink Current Increasing Switching Disabled, Sink Current Decreasing

Upper Window Input Current Threshold

Switching Enabled, Source Current Increasing Switching Disabled, Source Current Decreasing

Control Window Input Voltage

sink source

= 25 A)

Lower (I Upper (I

2. Tested junction temperature range for the NCP105X series: = −40°CT

low

= +125°C

high

Symbol Min Typ Max Unit

OSC(low)

OSC(high)

OSC

(max)

off(low)

on(low)

off(high)

on(high)

low

high

38 87

119

37 84

113

41 93

126

39 90

120

42.5 97

132

−

45.5

103 140

−

47 107 145

50 113 154

− 5.0 − %

74 77 80 %

−58

−50

1.1

4.2

37 25

−47.5

−37.5

47.5

37.5

1.35

4.6

−37

−25

1.6

5.0

kHz

A

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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055

ELECTRICAL CHARACTERISTICS (V

= 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

NCP1050, NCP1051, NCP1052 (I

= 25°C

= 125°C

NCP1053, NCP1054, NCP1055 (I

= 25°C

= 125°C

= 50 mA)

= 100 mA)

Power Switch Circuit & Startup Breakdown Voltage

= 100 A, TA = 25°C)

D(off)

Power Switch Circuit & Startup Circuit Off−State Leakage Current

= 650 V) TJ = 25°C

= 650 V) TJ = 125°C

Switching Characteristics (RL = 50 , VDS set for ID = 0.7 I

Iim

)

Turn−on Time (90% to 10%) Turn−off Time (10% to 90%)

CURRENT LIMIT AND THERMAL PROTECTION

Current Limit Threshold (T

= 25°C) (Note 6)

NCP1050 NCP1051 NCP1052 NCP1053 NCP1054

NCP1055 Conversion Power Deviation (TJ = 25°C) (Note 7) I2f Propagation Delay, Current Limit Threshold to Power Switch Circuit Output

NCP1050, NCP1051, NCP1052

NCP1053, NCP1054, NCP1055 Thermal Protection (VCC = 8.6 V) (Note 3, 4, 5)

Shutdown (Junction Temperature Increasing)

Hysteresis (Junction Temperature Decreasing)

STARTUP CONTROL

Startup/V

Startup Threshold/V

Minimum Operating/V

Regulation

Regulation Peak (VCC Increasing)

Valley Voltage After Turn−On

Hysteresis Undervoltage Lockout Threshold Voltage, VCC Decreasing V

CC(reset)

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

= 0 V

= 25°C

= −40 to 125°C

= V

= 25°C

= −40 to 125°C

Minimum Start−up Drain Voltage (I

CC(on)

− 0.2 V

= 0.5 mA, VCC = V

start

− 0.2 V) V

CC(on)

start(min)

Output Fault Condition Auto Restart

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

Average Switching Duty Cycle

Frequency

3. Tested junction temperature range for the NCP105X series: = −40°CT

low

4. Maximum package power dissipation limits must be observed.

= +125°C

high

5. Guaranteed by design only.

6. Adjust di/dt to reach I

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

in 4.0 sec.

lim

DS(on)

(BR)DS

DS(off)

off

lim

OSC

PLH

CC(on) CC(off)

start

rst



−

22 42

10 23

30 55

15 28

700 − − V

A

−

25 15

40 80

−

20 10

−

93 186 279 372 493 632

100 200 300 400 530 680

107 214 321 428 567 728

− 0 10 %A2Hz ns

−

135 160

−

− °C

140

−

160

−

8.0

7.0

−

8.5

7.5

1.0

9.0

8.0

−

4.0 4.5 5.0 V mA

5.4

4.5

4.6

3.5

6.3

5.6

−

8.0

6.6

7.2

−

7.0

− 13.4 20 V

−

6.0

3.5

−

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