ON NCP1203D100G, NCP1203D100R2G, NCP1203D40G, NCP1203D40R2G, NCP1203D60G Schematic [ru]

NCP1203

PWM Current--Mode
Controller for Universal
Off-- Line S upplies Featuring
Standby and Short Circuit
Protection

Housed in SOIC--8 or PDIP--8 package, the NCP1203 represents a
major leap toward ultra--compact Switchmode Power Supplies and
represents an excellent candidate to replace the UC384X devices. Due
to its proprietary SMARTMOS Very High Voltage Technology, the
circuit allows the implementation of complete off--line AC--DC
adapters, battery charger and a high--power SMPS with few external
components.

With an internal structure operating at a fixed 40 kHz, 60 kHz or
100 kHz switching frequency, the controller features a high--voltage
startup FET which ensures a clean and loss--less startup sequence. Its
current--mode control naturally provides good audio--susceptibility
and inherent pulse--by--pulse control.

When the current setpoint falls below a given value, e .g. the output
power demand diminishes, the IC automatically enters the so--called
skip cycle mode and provides improved efficiency at light loads
while offering excellent performance in standby conditions. Because
this occurs at a user adjustable low peak current, no acoustic noise
takes place.

The NCP1203 also includes an efficient protective circuitry which,
in presence of an output over load condition, disables the output
pulses while the device enters a safe burst mode, trying to restart.
Once the default has gone, the device auto--recovers. Finally, a
temperature shutdown with hysteresis helps building safe and robust
power supplies.

Features

 High--Voltage Startup Current Source
 Auto--Recovery Internal Output Short--Circuit Protection
 Extremely Low No--Load Standby Power
 Current--Mode with Adjustable Skip--Cycle Capability
 Internal Leading Edge Blanking
 250 mA Peak Current Capability
 Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz
 Direct Optocoupler Connection
 Undervoltage Lockout at 7.8 V Typical
 SPICE Models Available for TRANsient and AC Analysis
 Pin to Pin Compatible with NCP1200
 Pb--Free Packages are Available

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MARKING
DIAGRAM

8

SOIC--8

8

1

8

1

D1, D2 SUFFIX

CASE 751

x = 4, 6, or 1
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb--Free Package

PDIP--8
N SUFFIX
CASE 626

xx = 40, 60, or 100
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb--Free Package

PIN CONNECTIONS

Adj

1

FB

2

CS

3

GND

4

(Top View)

8

7

6

5

8

1

1

1203Pxx

YYWWG

HV

NC

V

CC

Drv

203Dx
ALYW

G

AWL

Applications

 AC--DC Adapters for Notebooks, etc.
 Offline Battery Chargers
 Auxiliary Power Supplies (USB, Appliances, TVs, etc.)

 Semiconductor Components Industries, LLC, 2010

December, 2010-- Rev. 10

ORDERING INFORMATION

See detailed ordering and shipping information in thepackage
dimensions section on page 13 of this data sheet.

1

Publication Order Number:

NCP1203/D

NCP1203

*

+

EMI

FILTER

UNIVERSAL

INPUT

*Please refer to the application information section

+

NCP1203

HV

Adj

1

FB

2

CS

3

GND

4

V

CC

Drv

8

7

6

5

Aux.

+

Figure 1. Typical Application Example

PIN FUNCTION DESCRIPTION

Pin No. Pin Name Function Pin Description

1 Adj Adjust the skipping peak current This pin lets you adjust the level at which the cycle skipping process takes

2 FB Sets the peak current setpoint By connecting an optocoupler to this pin, the peak current setpoint is

3 CS Current sense input This pin senses the primary current and routes it to the internal comparator

4 GND The IC ground --

5 Drv Driving pulses The driver’s output to an external MOSFET.

6 V

7 NC -- This unconnected pin ensures adequate creepage distance.

8 HV Ensure a clean and lossless

CC

Supplies the IC

startup s equence

place. Shorting this pin to ground, permanently disables the skip cycle
feature.

adjusted accordingly to the output power demand. Skip cycle occurs when
FB falls below Vpin1.

viaanL.E.B.

This pin is connected to an external bulk capacitor of typically 22 mF.

Connected to the high--voltage rail, this pin injects a constant current into
the V

capacitor during the startup sequence.

CC

V

OUT

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2

NCP1203

Adj

FB

CURRENT

SENSE

GROUND

HV

1

8

HV CURRENT
SOURCE

80 k

1.2 V

2

SKIP CYCLE
COMPARATOR

+

--

INTERNAL V

UVLO HIGH AND LOW

INTERNAL REGULATOR

CC

NC

7

24 k

Q FLIP--FLOP
DCmax = 80%

3

250 ns

L.E.B.

40--60--100 kHz

CLOCK

20 k 57 k

V

4

REF

+

25 k

1V

SET

RESET

+

--

Q

OVERLOAD

MANAGEMENT

250 mA

V

6

Drv

5

CC

--

Figure 2. Internal Circuit Architecture

MAXIMUM RATINGS

Rating Symbol Value Unit

Power Supply Voltage VCC,Drv 16 V

Power Supply Voltage on all other pins except Pin 5 (Drv), Pin 6 (VCC) and Pin 8 (HV) -- --0.3to10 V

Maximum Current into all pins except Pin 6 (VCC) and Pin 8 (HV) when
10 V ESD diodes are activated

Thermal Resistance, Junction--to--Air, PDIP--8 Version
Thermal Resistance, Junction--to--Air, SOIC Version
Thermal Resistance, Junction--to--Case

Maximum Junction Temperature TJ

R
R
R

--

θ

JA

θ

JA

θ

JC

MAX

Temperature Shutdown -- 170 C

Hysteresis in Shutdown -- 30 C

Operating Temperature Range T

Storage Temperature Range T

J

stg

ESD Capability, Human Body Model, All pins except Pin 6 (VCC) and Pin 8 (HV) -- 2.0 kV

ESD Capability, Machine Model -- 200 V

MaximumVoltageonPin8(HV)withPin6(VCC) Decoupled to Ground with 10mF

-- 500 V

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.

5.0 mA

100

C/W

178

57

150 C

--40 to +125 C

--60 to +150 C

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3

NCP1203

ELECTRICAL CHARACTERISTICS (For typical values T

= 11 V unless otherwise noted.)

V

CC

Characteristic

=25C, for min/max values TJ=0C to +125C, Max TJ= 150C,

J

Symbol Pin Min Ty p Max Unit

Supply Section (All frequency versions, otherwise noted)

Turn--on Threshold Level, V

Minimum Operating Voltage after Turn--on V

VCCDecreasing Level at which the Latchoff Phase Ends V

Going Up V

CC

CC(on)

CC(min)

CClatch

6 12.2 12.8 14 V

6 7.2 7.8 8.4 V

6 -- 4.9 -- V

Internal IC Consumption, No Output Load on Pin 5 ICC1 6 -- 750 880

(Note 1)

Internal IC Consumption, 1.0 nF Output Load on Pin 5,

F

=40kHz

SW

Internal IC Consumption, 1.0 nF Output Load on Pin 5,

F

=60kHz

SW

Internal IC Consumption, 1.0 nF Output Load on Pin 5,

= 100 kHz

F

SW

ICC2 6 -- 1.2 1.4

(Note 2)

ICC2 6 -- 1.4 1.6

(Note 2)

ICC2 6 -- 2.0 2.2

(Note 2)

Internal IC Consumption, Latch--off Phase, VCC=6.0V ICC3 6 -- 250 --

Internal Startup Current Source (Pin8biasedat50V)

High--Voltage Current Source, V

=10V IC1 8 3.5 6.0 9.0 mA

CC

High--Voltage Current Source, VCC=0 IC2 8 -- 11 -- mA

Drive Output

Output Voltage Rise--Time @ CL = 1.0 nF, 10-- 90% of

T

r

5 -- 67 -- ns

Output Signal

Output Voltage Fall--Time @ CL = 1.0 nF, 10--90% of

T

f

5 -- 28 -- ns

Output Signal

Source Resistance R

Sink Resistance R

OH

OL

5 27 40 61

5 5.0 10 20

Current Comparator (Pin 5 loaded unless otherwise noted)

Input Bias Current @ 1.0 V Input Level on Pin 3

Maximum Internal Current Setpoint (Note 3) I

Default Internal Current Setpoint for Skip Cycle Operation I

Propagation Delay from Current Detection to Gate OFF

Limit

Lskip

T

I

IB

DEL

3 -- 0.02 --

3 0.85 0.92 1.0 V

3 -- 360 -- mV

3 -- 90 160 ns

State

Leading Edge Blanking Duration (Note 3) T

LEB

3 -- 230 -- ns

Internal Oscillator (VCC= 11 V, Pin 5 loaded by 1 nF)

Oscillation Frequency, 40 kHz Version

Oscillation Frequency, 60 kHz Version f

Oscillation Frequency, 100 kHz Version f

f

OSC

OSC

OSC

-- 37 42 47 kHz

-- 57 65 73 kHz

-- 90 103 11 5 kHz

Maximum Duty--Cycle Dmax -- 74 80 87 %

Feedback Section (VCC= 11 V, Pin 5 unloaded)

Internal Pullup Resistor

Rup 2 -- 20 --

Pin 3 to Current Setpoint Division Ratio Iratio -- -- 3.3 -- --

Skip Cycle Generation

Default S kip Mode Level

Vskip 1 1.0 1.2 1.4 V

Pin 1 Internal Output Impedance Zout 1 -- 22 --

1. Max value at TJ=0C.

2. Maximum value @ T

3. Pin 5 loaded by 1 nF.

=25C, please see characterization curves.

J

mA

mA

mA

mA

mA

Ω

Ω

mA

kΩ

kΩ

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4

NCP1203

14.0

13.8

13.6

13.4

13.2

13.0

THRESHOLD (V)

12.8

CC(on)

12.6

V

12.4

12.2

900

860

820

780

740

700

660

620

580

, CURRENT CONSUMPTION (mA)

540

CC

I

500

8.4

8.2

8.0

LEVEL (V)

7.8

7.6

CC(min)

V

7.4

7.2

--25 --25

TEMPERATURE (C) TEMPERATURE (C)

Figure 3. V

CC(on)

50

Threshold versus

75

100

-- 5 0 0

Figure 4. V

Temperature

2.0

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

, 1 nF LOAD CONSUMPTION (mA)

1.1

CC

I

-- 2 5

1251007550250-- 5 0

TEMPERATURE (C)

1.0

25250 125

CC(min)

Level versus Temperature

100 kHz

60 kHz

40 kHz

TEMPERATURE (C)

50 75 100

125-- 5 0

1251007550250-- 5 0 -- 2 5

HV CURRENT SOURCE (mA)

Figure 5. ICCurrent Consumption (No Load)

versus Temperature

8.0

7.5

7.0

6.5

6.0

5.5

5.0

4.5

4.0

-- 2 5

TEMPERATURE (C)

60 kHz

40 kHz

100 kHz

Figure 7. HV Current Source at VCC=10V

versus Temperature

400

350

300

=6V(mA)

CC

250

@V

CC

I

200

1251007550250-- 5 0

150

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5

Figure 6. ICCConsumption (Loaded by 1 nF)

versus Temperature

-- 2 5

TEMPERATURE (C)

Figure 8. ICConsumption at VCC=6V

versus Temperature

1251007550250-- 5 0